Merge branch 'master' into vendor_fifo

143 files changed, 4919 insertions, 588 deletions

diff --git a/examples/build_system/cmake/cpu/arm1176jzf-s.cmake b/examples/build_system/cmake/cpu/arm1176jzf-s.cmake
new file mode 100644
index 000000000..8029e3987
--- /dev/null
+++ b/examples/build_system/cmake/cpu/arm1176jzf-s.cmake
@@ -0,0 +1,21 @@
+if (TOOLCHAIN STREQUAL "gcc")
+  set(TOOLCHAIN_COMMON_FLAGS
+    -mcpu=arm1176jzf-s
+    -ffreestanding
+  )
+  # set(FREERTOS_PORT GCC_ARM_CM0 CACHE INTERNAL "")
+
+elseif (TOOLCHAIN STREQUAL "clang")
+  set(TOOLCHAIN_COMMON_FLAGS
+    --target=arm-none-eabi
+    -mcpu=arm1176jzf-s
+    -mfpu=none
+    -mfloat-abi=soft
+    -ffreestanding
+  )
+  #set(FREERTOS_PORT GCC_ARM_CM0 CACHE INTERNAL "")
+
+elseif (TOOLCHAIN STREQUAL "iar")
+  message(FATAL_ERROR "IAR not supported")
+
+endif ()
diff --git a/examples/build_system/cmake/cpu/arm926ej-s.cmake b/examples/build_system/cmake/cpu/arm926ej-s.cmake
new file mode 100644
index 000000000..c19b9f8a8
--- /dev/null
+++ b/examples/build_system/cmake/cpu/arm926ej-s.cmake
@@ -0,0 +1,21 @@
+if (TOOLCHAIN STREQUAL "gcc")
+  set(TOOLCHAIN_COMMON_FLAGS
+    -mcpu=arm926ej-s
+    -ffreestanding
+    )
+  # set(FREERTOS_PORT GCC_ARM_CM0 CACHE INTERNAL "")
+
+elseif (TOOLCHAIN STREQUAL "clang")
+  set(TOOLCHAIN_COMMON_FLAGS
+    --target=arm-none-eabi
+    -mcpu=arm926ej-s
+    -mfpu=none
+    -mfloat-abi=soft
+    -ffreestanding
+    )
+  #set(FREERTOS_PORT GCC_ARM_CM0 CACHE INTERNAL "")
+
+elseif (TOOLCHAIN STREQUAL "iar")
+  message(FATAL_ERROR "IAR not supported")
+
+endif ()
diff --git a/examples/build_system/cmake/cpu/cortex-a53.cmake b/examples/build_system/cmake/cpu/cortex-a53.cmake
new file mode 100644
index 000000000..dde8c0a0c
--- /dev/null
+++ b/examples/build_system/cmake/cpu/cortex-a53.cmake
@@ -0,0 +1,17 @@
+if (TOOLCHAIN STREQUAL "gcc")
+	set(TOOLCHAIN_COMMON_FLAGS
+		-mcpu=cortex-a53
+		)
+	# set(FREERTOS_PORT GCC_ARM_CM0 CACHE INTERNAL "")
+
+elseif (TOOLCHAIN STREQUAL "clang")
+	set(TOOLCHAIN_COMMON_FLAGS
+		--target=arm-none-eabi
+		-mcpu=cortex-a53
+		)
+	#set(FREERTOS_PORT GCC_ARM_CM0 CACHE INTERNAL "")
+
+elseif (TOOLCHAIN STREQUAL "iar")
+	message(FATAL_ERROR "IAR not supported")
+
+endif ()
diff --git a/examples/build_system/cmake/cpu/cortex-a72.cmake b/examples/build_system/cmake/cpu/cortex-a72.cmake
new file mode 100644
index 000000000..a44324234
--- /dev/null
+++ b/examples/build_system/cmake/cpu/cortex-a72.cmake
@@ -0,0 +1,17 @@
+if (TOOLCHAIN STREQUAL "gcc")
+	set(TOOLCHAIN_COMMON_FLAGS
+		-mcpu=cortex-a72
+		)
+	# set(FREERTOS_PORT GCC_ARM_CM0 CACHE INTERNAL "")
+
+elseif (TOOLCHAIN STREQUAL "clang")
+	set(TOOLCHAIN_COMMON_FLAGS
+		--target=arm-none-eabi
+		-mcpu=cortex-a72
+		)
+	#set(FREERTOS_PORT GCC_ARM_CM0 CACHE INTERNAL "")
+
+elseif (TOOLCHAIN STREQUAL "iar")
+	message(FATAL_ERROR "IAR not supported")
+
+endif ()
diff --git a/examples/build_system/cmake/cpu/cortex-m0.cmake b/examples/build_system/cmake/cpu/cortex-m0.cmake
index bc2257048..62019d90d 100644
--- a/examples/build_system/cmake/cpu/cortex-m0.cmake
+++ b/examples/build_system/cmake/cpu/cortex-m0.cmake
@@ -4,14 +4,19 @@ if (TOOLCHAIN STREQUAL "gcc")
     -mcpu=cortex-m0plus
     -mfloat-abi=soft
     )
+  set(FREERTOS_PORT GCC_ARM_CM0 CACHE INTERNAL "")
 
+elseif (TOOLCHAIN STREQUAL "clang")
+  set(TOOLCHAIN_COMMON_FLAGS
+    --target=arm-none-eabi
+    -mcpu=cortex-m0
+    )
   set(FREERTOS_PORT GCC_ARM_CM0 CACHE INTERNAL "")
 
 elseif (TOOLCHAIN STREQUAL "iar")
   set(TOOLCHAIN_COMMON_FLAGS
     --cpu cortex-m0
     )
-
   set(FREERTOS_PORT IAR_ARM_CM0 CACHE INTERNAL "")
 
 endif ()
diff --git a/examples/build_system/cmake/cpu/cortex-m0plus.cmake b/examples/build_system/cmake/cpu/cortex-m0plus.cmake
index bc2257048..ddf0f16af 100644
--- a/examples/build_system/cmake/cpu/cortex-m0plus.cmake
+++ b/examples/build_system/cmake/cpu/cortex-m0plus.cmake
@@ -4,14 +4,19 @@ if (TOOLCHAIN STREQUAL "gcc")
     -mcpu=cortex-m0plus
     -mfloat-abi=soft
     )
+  set(FREERTOS_PORT GCC_ARM_CM0 CACHE INTERNAL "")
 
+elseif (TOOLCHAIN STREQUAL "clang")
+  set(TOOLCHAIN_COMMON_FLAGS
+    --target=arm-none-eabi
+    -mcpu=cortex-m0plus
+    )
   set(FREERTOS_PORT GCC_ARM_CM0 CACHE INTERNAL "")
 
 elseif (TOOLCHAIN STREQUAL "iar")
   set(TOOLCHAIN_COMMON_FLAGS
     --cpu cortex-m0
     )
-
   set(FREERTOS_PORT IAR_ARM_CM0 CACHE INTERNAL "")
 
 endif ()
diff --git a/examples/build_system/cmake/cpu/cortex-m23.cmake b/examples/build_system/cmake/cpu/cortex-m23.cmake
index c7ce1d242..00382ed9b 100644
--- a/examples/build_system/cmake/cpu/cortex-m23.cmake
+++ b/examples/build_system/cmake/cpu/cortex-m23.cmake
@@ -4,14 +4,19 @@ if (TOOLCHAIN STREQUAL "gcc")
     -mcpu=cortex-m23
     -mfloat-abi=soft
     )
+  set(FREERTOS_PORT GCC_ARM_CM23_NTZ_NONSECURE CACHE INTERNAL "")
 
+elseif (TOOLCHAIN STREQUAL "clang")
+  set(TOOLCHAIN_COMMON_FLAGS
+    --target=arm-none-eabi
+    -mcpu=cortex-m23
+    )
   set(FREERTOS_PORT GCC_ARM_CM23_NTZ_NONSECURE CACHE INTERNAL "")
 
 elseif (TOOLCHAIN STREQUAL "iar")
   set(TOOLCHAIN_COMMON_FLAGS
     --cpu cortex-m23
     )
-
   set(FREERTOS_PORT IAR_ARM_CM23_NTZ_NONSECURE CACHE INTERNAL "")
 
 endif ()
diff --git a/examples/build_system/cmake/cpu/cortex-m3.cmake b/examples/build_system/cmake/cpu/cortex-m3.cmake
index f6f5a62f8..27888604e 100644
--- a/examples/build_system/cmake/cpu/cortex-m3.cmake
+++ b/examples/build_system/cmake/cpu/cortex-m3.cmake
@@ -3,14 +3,19 @@ if (TOOLCHAIN STREQUAL "gcc")
     -mthumb
     -mcpu=cortex-m3
     )
+  set(FREERTOS_PORT GCC_ARM_CM3 CACHE INTERNAL "")
 
+elseif (TOOLCHAIN STREQUAL "clang")
+  set(TOOLCHAIN_COMMON_FLAGS
+    --target=arm-none-eabi
+    -mcpu=cortex-m3
+    )
   set(FREERTOS_PORT GCC_ARM_CM3 CACHE INTERNAL "")
 
 elseif (TOOLCHAIN STREQUAL "iar")
   set(TOOLCHAIN_COMMON_FLAGS
     --cpu cortex-m3
     )
-
   set(FREERTOS_PORT IAR_ARM_CM3 CACHE INTERNAL "")
 
 endif ()
diff --git a/examples/build_system/cmake/cpu/cortex-m33-nodsp-nofp.cmake b/examples/build_system/cmake/cpu/cortex-m33-nodsp-nofp.cmake
index 01e6b979a..51fd70b0e 100644
--- a/examples/build_system/cmake/cpu/cortex-m33-nodsp-nofp.cmake
+++ b/examples/build_system/cmake/cpu/cortex-m33-nodsp-nofp.cmake
@@ -4,14 +4,15 @@ if (TOOLCHAIN STREQUAL "gcc")
     -mcpu=cortex-m33+nodsp
     -mfloat-abi=soft
     )
-
   set(FREERTOS_PORT GCC_ARM_CM33_NTZ_NONSECURE CACHE INTERNAL "")
 
+elseif (TOOLCHAIN STREQUAL "clang")
+  message(FATAL_ERROR "Clang is not supported for this target")
+
 elseif (TOOLCHAIN STREQUAL "iar")
   set(TOOLCHAIN_COMMON_FLAGS
     --cpu cortex-m33+nodsp
     )
-
   set(FREERTOS_PORT IAR_ARM_CM33_NTZ_NONSECURE CACHE INTERNAL "")
 
 endif ()
diff --git a/examples/build_system/cmake/cpu/cortex-m33-nodsp.cmake b/examples/build_system/cmake/cpu/cortex-m33-nodsp.cmake
new file mode 100644
index 000000000..b3cd743fd
--- /dev/null
+++ b/examples/build_system/cmake/cpu/cortex-m33-nodsp.cmake
@@ -0,0 +1,25 @@
+if (TOOLCHAIN STREQUAL "gcc")
+  set(TOOLCHAIN_COMMON_FLAGS
+    -mthumb
+    -mcpu=cortex-m33+nodsp
+    -mfloat-abi=hard
+    -mfpu=fpv5-sp-d16
+    )
+  set(FREERTOS_PORT GCC_ARM_CM33_NTZ_NONSECURE CACHE INTERNAL "")
+
+elseif (TOOLCHAIN STREQUAL "clang")
+  set(TOOLCHAIN_COMMON_FLAGS
+    --target=arm-none-eabi
+    -mcpu=cortex-m33+nodsp
+    -mfpu=fpv5-sp-d16
+    )
+  set(FREERTOS_PORT GCC_ARM_CM33_NTZ_NONSECURE CACHE INTERNAL "")
+
+elseif (TOOLCHAIN STREQUAL "iar")
+  set(TOOLCHAIN_COMMON_FLAGS
+    --cpu cortex-m33+nodsp
+    --fpu VFPv5-SP
+    )
+  set(FREERTOS_PORT IAR_ARM_CM33_NTZ_NONSECURE CACHE INTERNAL "")
+
+endif ()
diff --git a/examples/build_system/cmake/cpu/cortex-m33.cmake b/examples/build_system/cmake/cpu/cortex-m33.cmake
index 94c29099d..d56d07ebc 100644
--- a/examples/build_system/cmake/cpu/cortex-m33.cmake
+++ b/examples/build_system/cmake/cpu/cortex-m33.cmake
@@ -5,7 +5,14 @@ if (TOOLCHAIN STREQUAL "gcc")
     -mfloat-abi=hard
     -mfpu=fpv5-sp-d16
     )
+  set(FREERTOS_PORT GCC_ARM_CM33_NTZ_NONSECURE CACHE INTERNAL "")
 
+elseif (TOOLCHAIN STREQUAL "clang")
+  set(TOOLCHAIN_COMMON_FLAGS
+    --target=arm-none-eabi
+    -mcpu=cortex-m33
+    -mfpu=fpv5-sp-d16
+    )
   set(FREERTOS_PORT GCC_ARM_CM33_NTZ_NONSECURE CACHE INTERNAL "")
 
 elseif (TOOLCHAIN STREQUAL "iar")
@@ -13,7 +20,6 @@ elseif (TOOLCHAIN STREQUAL "iar")
     --cpu cortex-m33
     --fpu VFPv5-SP
     )
-
   set(FREERTOS_PORT IAR_ARM_CM33_NTZ_NONSECURE CACHE INTERNAL "")
 
 endif ()
diff --git a/examples/build_system/cmake/cpu/cortex-m4.cmake b/examples/build_system/cmake/cpu/cortex-m4.cmake
index db308aa83..9cdadc6f8 100644
--- a/examples/build_system/cmake/cpu/cortex-m4.cmake
+++ b/examples/build_system/cmake/cpu/cortex-m4.cmake
@@ -5,7 +5,16 @@ if (TOOLCHAIN STREQUAL "gcc")
     -mfloat-abi=hard
     -mfpu=fpv4-sp-d16
     )
+  if (NOT DEFINED FREERTOS_PORT)
+    set(FREERTOS_PORT GCC_ARM_CM4F CACHE INTERNAL "")
+  endif ()
 
+elseif (TOOLCHAIN STREQUAL "clang")
+  set(TOOLCHAIN_COMMON_FLAGS
+    --target=arm-none-eabi
+    -mcpu=cortex-m4
+    -mfpu=fpv4-sp-d16
+    )
   if (NOT DEFINED FREERTOS_PORT)
     set(FREERTOS_PORT GCC_ARM_CM4F CACHE INTERNAL "")
   endif ()
diff --git a/examples/build_system/cmake/cpu/cortex-m7-fpsp.cmake b/examples/build_system/cmake/cpu/cortex-m7-fpsp.cmake
new file mode 100644
index 000000000..b10f00fc2
--- /dev/null
+++ b/examples/build_system/cmake/cpu/cortex-m7-fpsp.cmake
@@ -0,0 +1,25 @@
+if (TOOLCHAIN STREQUAL "gcc")
+  set(TOOLCHAIN_COMMON_FLAGS
+    -mthumb
+    -mcpu=cortex-m7
+    -mfloat-abi=hard
+    -mfpu=fpv5-sp-d16
+    )
+  set(FREERTOS_PORT GCC_ARM_CM7 CACHE INTERNAL "")
+
+elseif (TOOLCHAIN STREQUAL "clang")
+  set(TOOLCHAIN_COMMON_FLAGS
+    --target=arm-none-eabi
+    -mcpu=cortex-m7
+    -mfpu=fpv5-sp-d16
+    )
+  set(FREERTOS_PORT GCC_ARM_CM7 CACHE INTERNAL "")
+
+elseif (TOOLCHAIN STREQUAL "iar")
+  set(TOOLCHAIN_COMMON_FLAGS
+    --cpu cortex-m7
+    --fpu VFPv5_sp
+    )
+  set(FREERTOS_PORT IAR_ARM_CM7 CACHE INTERNAL "")
+
+endif ()
diff --git a/examples/build_system/cmake/cpu/cortex-m7.cmake b/examples/build_system/cmake/cpu/cortex-m7.cmake
index 3e5f7f44b..b41dfded5 100644
--- a/examples/build_system/cmake/cpu/cortex-m7.cmake
+++ b/examples/build_system/cmake/cpu/cortex-m7.cmake
@@ -5,7 +5,14 @@ if (TOOLCHAIN STREQUAL "gcc")
     -mfloat-abi=hard
     -mfpu=fpv5-d16
     )
+  set(FREERTOS_PORT GCC_ARM_CM7 CACHE INTERNAL "")
 
+elseif (TOOLCHAIN STREQUAL "clang")
+  set(TOOLCHAIN_COMMON_FLAGS
+    --target=arm-none-eabi
+    -mcpu=cortex-m7
+    -mfpu=fpv5-d16
+    )
   set(FREERTOS_PORT GCC_ARM_CM7 CACHE INTERNAL "")
 
 elseif (TOOLCHAIN STREQUAL "iar")
@@ -13,7 +20,6 @@ elseif (TOOLCHAIN STREQUAL "iar")
     --cpu cortex-m7
     --fpu VFPv5_D16
     )
-
   set(FREERTOS_PORT IAR_ARM_CM7 CACHE INTERNAL "")
 
 endif ()
diff --git a/examples/build_system/cmake/cpu/msp430.cmake b/examples/build_system/cmake/cpu/msp430.cmake
new file mode 100644
index 000000000..584ec5741
--- /dev/null
+++ b/examples/build_system/cmake/cpu/msp430.cmake
@@ -0,0 +1,10 @@
+if (TOOLCHAIN STREQUAL "gcc")
+  set(FREERTOS_PORT GCC_MSP430F449 CACHE INTERNAL "")
+
+elseif (TOOLCHAIN STREQUAL "clang")
+  message(FATAL_ERROR "Clang is not supported for this target")
+
+elseif (TOOLCHAIN STREQUAL "iar")
+  set(FREERTOS_PORT IAR_MSP430 CACHE INTERNAL "")
+
+endif ()
diff --git a/examples/build_system/cmake/cpu/rv32i-ilp32.cmake b/examples/build_system/cmake/cpu/rv32i-ilp32.cmake
new file mode 100644
index 000000000..605c40ba1
--- /dev/null
+++ b/examples/build_system/cmake/cpu/rv32i-ilp32.cmake
@@ -0,0 +1,19 @@
+if (TOOLCHAIN STREQUAL "gcc")
+  set(TOOLCHAIN_COMMON_FLAGS
+    -march=rv32i_zicsr
+    -mabi=ilp32
+    )
+  set(FREERTOS_PORT GCC_RISC_V CACHE INTERNAL "")
+
+elseif (TOOLCHAIN STREQUAL "clang")
+  set(TOOLCHAIN_COMMON_FLAGS
+    -march=rv32i_zicsr
+    -mabi=ilp32
+    )
+  set(FREERTOS_PORT GCC_RISC_V CACHE INTERNAL "")
+
+elseif (TOOLCHAIN STREQUAL "iar")
+  message(FATAL_ERROR "IAR not supported")
+  set(FREERTOS_PORT IAR_RISC_V CACHE INTERNAL "")
+
+endif ()
diff --git a/examples/build_system/cmake/cpu/rv32imac-ilp32.cmake b/examples/build_system/cmake/cpu/rv32imac-ilp32.cmake
new file mode 100644
index 000000000..584d90519
--- /dev/null
+++ b/examples/build_system/cmake/cpu/rv32imac-ilp32.cmake
@@ -0,0 +1,18 @@
+if (TOOLCHAIN STREQUAL "gcc")
+  set(TOOLCHAIN_COMMON_FLAGS
+    -march=rv32imac_zicsr
+    -mabi=ilp32
+    )
+  set(FREERTOS_PORT GCC_RISC_V CACHE INTERNAL "")
+
+elseif (TOOLCHAIN STREQUAL "clang")
+  set(TOOLCHAIN_COMMON_FLAGS
+    -march=rv32imac_zicsr
+    -mabi=ilp32
+    )
+  set(FREERTOS_PORT GCC_RISC_V CACHE INTERNAL "")
+
+elseif (TOOLCHAIN STREQUAL "iar")
+  message(FATAL_ERROR "IAR not supported")
+  set(FREERTOS_PORT IAR_RISC_V CACHE INTERNAL "")
+endif ()
diff --git a/examples/build_system/cmake/toolchain/aarch64_gcc.cmake b/examples/build_system/cmake/toolchain/aarch64_gcc.cmake
new file mode 100644
index 000000000..2d30a0b71
--- /dev/null
+++ b/examples/build_system/cmake/toolchain/aarch64_gcc.cmake
@@ -0,0 +1,21 @@
+if (NOT DEFINED CMAKE_C_COMPILER)
+  set(CMAKE_C_COMPILER "aarch64-none-elf-gcc")
+endif ()
+
+if (NOT DEFINED CMAKE_CXX_COMPILER)
+  set(CMAKE_CXX_COMPILER "aarch64-none-elf-g++")
+endif ()
+
+set(CMAKE_ASM_COMPILER ${CMAKE_C_COMPILER})
+set(CMAKE_SIZE "aarch64-none-elf-size" CACHE FILEPATH "")
+set(CMAKE_OBJCOPY "aarch64-none-elf-objcopy" CACHE FILEPATH "")
+set(CMAKE_OBJDUMP "aarch64-none-elf-objdump" CACHE FILEPATH "")
+
+include(${CMAKE_CURRENT_LIST_DIR}/common.cmake)
+
+get_property(IS_IN_TRY_COMPILE GLOBAL PROPERTY IN_TRY_COMPILE)
+if (IS_IN_TRY_COMPILE)
+  set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -nostdlib")
+  set(CMAKE_CXX_LINK_FLAGS "${CMAKE_CXX_LINK_FLAGS} -nostdlib")
+  cmake_print_variables(CMAKE_C_LINK_FLAGS)
+endif ()
diff --git a/examples/build_system/cmake/toolchain/arm_clang.cmake b/examples/build_system/cmake/toolchain/arm_clang.cmake
new file mode 100644
index 000000000..754d672fd
--- /dev/null
+++ b/examples/build_system/cmake/toolchain/arm_clang.cmake
@@ -0,0 +1,21 @@
+if (NOT DEFINED CMAKE_C_COMPILER)
+  set(CMAKE_C_COMPILER "clang")
+endif ()
+
+if (NOT DEFINED CMAKE_CXX_COMPILER)
+  set(CMAKE_CXX_COMPILER "clang++")
+endif ()
+
+set(CMAKE_ASM_COMPILER ${CMAKE_C_COMPILER})
+set(CMAKE_SIZE "llvm-size" CACHE FILEPATH "")
+set(CMAKE_OBJCOPY "llvm-objcopy" CACHE FILEPATH "")
+set(CMAKE_OBJDUMP "llvm-objdump" CACHE FILEPATH "")
+
+include(${CMAKE_CURRENT_LIST_DIR}/common.cmake)
+
+get_property(IS_IN_TRY_COMPILE GLOBAL PROPERTY IN_TRY_COMPILE)
+if (IS_IN_TRY_COMPILE)
+  set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -nostdlib")
+  set(CMAKE_CXX_LINK_FLAGS "${CMAKE_CXX_LINK_FLAGS} -nostdlib")
+  cmake_print_variables(CMAKE_C_LINK_FLAGS)
+endif ()
diff --git a/examples/build_system/cmake/toolchain/arm_gcc.cmake b/examples/build_system/cmake/toolchain/arm_gcc.cmake
index d3fd5b557..d3d73c629 100644
--- a/examples/build_system/cmake/toolchain/arm_gcc.cmake
+++ b/examples/build_system/cmake/toolchain/arm_gcc.cmake
@@ -1,5 +1,3 @@
-set(CMAKE_SYSTEM_NAME Generic)
-
 if (NOT DEFINED CMAKE_C_COMPILER)
   set(CMAKE_C_COMPILER "arm-none-eabi-gcc")
 endif ()
@@ -9,44 +7,15 @@ if (NOT DEFINED CMAKE_CXX_COMPILER)
 endif ()
 
 set(CMAKE_ASM_COMPILER ${CMAKE_C_COMPILER})
-
 set(CMAKE_SIZE "arm-none-eabi-size" CACHE FILEPATH "")
 set(CMAKE_OBJCOPY "arm-none-eabi-objcopy" CACHE FILEPATH "")
 set(CMAKE_OBJDUMP "arm-none-eabi-objdump" CACHE FILEPATH "")
 
-set_property(GLOBAL PROPERTY TARGET_SUPPORTS_SHARED_LIBS FALSE)
-
-# Look for includes and libraries only in the target system prefix.
-set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
-set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
-set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
-set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
-
-# pass TOOLCHAIN_CPU to
-set(CMAKE_TRY_COMPILE_PLATFORM_VARIABLES CMAKE_SYSTEM_PROCESSOR)
-
-include(${CMAKE_CURRENT_LIST_DIR}/../cpu/${CMAKE_SYSTEM_PROCESSOR}.cmake)
-
-# enable all possible warnings for building examples
-list(APPEND TOOLCHAIN_COMMON_FLAGS
-  -fdata-sections
-  -ffunction-sections
-  -fsingle-precision-constant
-  -fno-strict-aliasing
-  )
-
-list(APPEND TOOLCHAIN_EXE_LINKER_FLAGS
-  -Wl,--print-memory-usage
-  -Wl,--gc-sections
-  -Wl,--cref
-  )
-
-include(${CMAKE_CURRENT_LIST_DIR}/set_flags.cmake)
+include(${CMAKE_CURRENT_LIST_DIR}/common.cmake)
 
-# try_compile is cmake test compiling its own example,
-# pass -nostdlib to skip stdlib linking
 get_property(IS_IN_TRY_COMPILE GLOBAL PROPERTY IN_TRY_COMPILE)
 if (IS_IN_TRY_COMPILE)
   set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -nostdlib")
   set(CMAKE_CXX_LINK_FLAGS "${CMAKE_CXX_LINK_FLAGS} -nostdlib")
+  cmake_print_variables(CMAKE_C_LINK_FLAGS)
 endif ()
diff --git a/examples/build_system/cmake/toolchain/arm_iar.cmake b/examples/build_system/cmake/toolchain/arm_iar.cmake
index 1482624e5..6d2219ca8 100644
--- a/examples/build_system/cmake/toolchain/arm_iar.cmake
+++ b/examples/build_system/cmake/toolchain/arm_iar.cmake
@@ -1,32 +1,17 @@
-set(CMAKE_SYSTEM_NAME Generic)
+if (NOT DEFINED CMAKE_C_COMPILER)
+  set(CMAKE_C_COMPILER "iccarm")
+endif()
 
-set(CMAKE_C_COMPILER "iccarm")
-set(CMAKE_CXX_COMPILER "iccarm")
-set(CMAKE_ASM_COMPILER "iasmarm")
+if (NOT DEFINED CMAKE_CXX_COMPILER)
+  set(CMAKE_CXX_COMPILER "iccarm")
+endif()
+
+if (NOT DEFINED CMAKE_ASM_COMPILER)
+  set(CMAKE_ASM_COMPILER "iasmarm")
+endif()
 
 set(CMAKE_SIZE "size" CACHE FILEPATH "")
 set(CMAKE_OBJCOPY "ielftool" CACHE FILEPATH "")
 set(CMAKE_OBJDUMP "iefdumparm" CACHE FILEPATH "")
 
-set_property(GLOBAL PROPERTY TARGET_SUPPORTS_SHARED_LIBS FALSE)
-
-# Look for includes and libraries only in the target system prefix.
-set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
-set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
-set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
-set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
-
-# pass TOOLCHAIN_CPU to
-set(CMAKE_TRY_COMPILE_PLATFORM_VARIABLES CMAKE_SYSTEM_PROCESSOR)
-
-include(${CMAKE_CURRENT_LIST_DIR}/../cpu/${CMAKE_SYSTEM_PROCESSOR}.cmake)
-
-# enable all possible warnings for building examples
-list(APPEND TOOLCHAIN_COMMON_FLAGS
-  )
-
-list(APPEND TOOLCHAIN_EXE_LINKER_FLAGS
-  --diag_suppress=Li065
-  )
-
-include(${CMAKE_CURRENT_LIST_DIR}/set_flags.cmake)
+include(${CMAKE_CURRENT_LIST_DIR}/common.cmake)
diff --git a/examples/build_system/cmake/toolchain/common.cmake b/examples/build_system/cmake/toolchain/common.cmake
new file mode 100644
index 000000000..688715914
--- /dev/null
+++ b/examples/build_system/cmake/toolchain/common.cmake
@@ -0,0 +1,64 @@
+include(CMakePrintHelpers)
+
+# ----------------------------------------------------------------------------
+# Common
+# ----------------------------------------------------------------------------
+set(CMAKE_SYSTEM_NAME Generic)
+set_property(GLOBAL PROPERTY TARGET_SUPPORTS_SHARED_LIBS FALSE)
+
+# Look for includes and libraries only in the target system prefix.
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+
+# pass TOOLCHAIN_CPU to
+set(CMAKE_TRY_COMPILE_PLATFORM_VARIABLES CMAKE_SYSTEM_PROCESSOR)
+include(${CMAKE_CURRENT_LIST_DIR}/../cpu/${CMAKE_SYSTEM_PROCESSOR}.cmake)
+
+# ----------------------------------------------------------------------------
+# Compile flags
+# ----------------------------------------------------------------------------
+if (TOOLCHAIN STREQUAL "gcc")
+  list(APPEND TOOLCHAIN_COMMON_FLAGS
+    -fdata-sections
+    -ffunction-sections
+    -fsingle-precision-constant
+    -fno-strict-aliasing
+    )
+  list(APPEND TOOLCHAIN_EXE_LINKER_FLAGS
+    -Wl,--print-memory-usage
+    -Wl,--gc-sections
+    -Wl,--cref
+    )
+
+elseif (TOOLCHAIN STREQUAL "iar")
+  #list(APPEND TOOLCHAIN_COMMON_FLAGS)
+  list(APPEND TOOLCHAIN_EXE_LINKER_FLAGS
+    --diag_suppress=Li065
+    )
+
+elseif (TOOLCHAIN STREQUAL "clang")
+  list(APPEND TOOLCHAIN_COMMON_FLAGS
+    -fdata-sections
+    -ffunction-sections
+    -fno-strict-aliasing
+    )
+  list(APPEND TOOLCHAIN_EXE_LINKER_FLAGS
+    -Wl,--print-memory-usage
+    -Wl,--gc-sections
+    -Wl,--cref
+    )
+endif ()
+
+# join the toolchain flags into a single string
+list(JOIN TOOLCHAIN_COMMON_FLAGS " " TOOLCHAIN_COMMON_FLAGS)
+foreach (LANG IN ITEMS C CXX ASM)
+  set(CMAKE_${LANG}_FLAGS_INIT ${TOOLCHAIN_COMMON_FLAGS})
+  # optimization flags for LOG, LOGGER ?
+  #set(CMAKE_${LANG}_FLAGS_RELEASE_INIT "-Os")
+  #set(CMAKE_${LANG}_FLAGS_DEBUG_INIT "-O0")
+endforeach ()
+
+# Linker
+list(JOIN TOOLCHAIN_EXE_LINKER_FLAGS " " CMAKE_EXE_LINKER_FLAGS_INIT)
diff --git a/examples/build_system/cmake/toolchain/msp430_gcc.cmake b/examples/build_system/cmake/toolchain/msp430_gcc.cmake
new file mode 100644
index 000000000..73368adba
--- /dev/null
+++ b/examples/build_system/cmake/toolchain/msp430_gcc.cmake
@@ -0,0 +1,15 @@
+if (NOT DEFINED CMAKE_C_COMPILER)
+  set(CMAKE_C_COMPILER "msp430-elf-gcc")
+endif ()
+
+if (NOT DEFINED CMAKE_CXX_COMPILER)
+  set(CMAKE_CXX_COMPILER "msp430-elf-g++")
+endif ()
+
+set(CMAKE_ASM_COMPILER ${CMAKE_C_COMPILER})
+
+set(CMAKE_SIZE "msp430-elf-size" CACHE FILEPATH "")
+set(CMAKE_OBJCOPY "msp430-elf-objcopy" CACHE FILEPATH "")
+set(CMAKE_OBJDUMP "msp430-elf-objdump" CACHE FILEPATH "")
+
+include(${CMAKE_CURRENT_LIST_DIR}/common.cmake)
diff --git a/examples/build_system/cmake/toolchain/riscv_gcc.cmake b/examples/build_system/cmake/toolchain/riscv_gcc.cmake
new file mode 100644
index 000000000..d788df023
--- /dev/null
+++ b/examples/build_system/cmake/toolchain/riscv_gcc.cmake
@@ -0,0 +1,30 @@
+# default Toolchain from https://github.com/xpack-dev-tools/riscv-none-elf-gcc-xpack
+if (NOT DEFINED CROSS_COMPILE)
+  set(CROSS_COMPILE "riscv-none-elf-")
+endif ()
+
+if (NOT DEFINED CMAKE_C_COMPILER)
+  set(CMAKE_C_COMPILER ${CROSS_COMPILE}gcc)
+endif ()
+
+if (NOT DEFINED CMAKE_C_COMPILER)
+  set(CMAKE_C_COMPILER ${CROSS_COMPILE}gcc)
+endif ()
+
+if (NOT DEFINED CMAKE_CXX_COMPILER)
+  set(CMAKE_CXX_COMPILER ${CROSS_COMPILE}g++)
+endif ()
+
+set(CMAKE_ASM_COMPILER ${CMAKE_C_COMPILER})
+set(CMAKE_SIZE ${CROSS_COMPILE}size CACHE FILEPATH "")
+set(CMAKE_OBJCOPY ${CROSS_COMPILE}objcopy CACHE FILEPATH "")
+set(CMAKE_OBJDUMP ${CROSS_COMPILE}objdump CACHE FILEPATH "")
+
+include(${CMAKE_CURRENT_LIST_DIR}/common.cmake)
+
+get_property(IS_IN_TRY_COMPILE GLOBAL PROPERTY IN_TRY_COMPILE)
+if (IS_IN_TRY_COMPILE)
+  set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -nostdlib")
+  set(CMAKE_CXX_LINK_FLAGS "${CMAKE_CXX_LINK_FLAGS} -nostdlib")
+  cmake_print_variables(CMAKE_C_LINK_FLAGS)
+endif ()
diff --git a/examples/build_system/cmake/toolchain/set_flags.cmake b/examples/build_system/cmake/toolchain/set_flags.cmake
deleted file mode 100644
index 44930ef4d..000000000
--- a/examples/build_system/cmake/toolchain/set_flags.cmake
+++ /dev/null
@@ -1,17 +0,0 @@
-include(CMakePrintHelpers)
-
-# join the toolchain flags into a single string
-list(JOIN TOOLCHAIN_COMMON_FLAGS " " TOOLCHAIN_COMMON_FLAGS)
-
-foreach (LANG IN ITEMS C CXX ASM)
-  set(CMAKE_${LANG}_FLAGS_INIT ${TOOLCHAIN_COMMON_FLAGS})
-
-  #cmake_print_variables(CMAKE_${LANG}_FLAGS_INIT)
-
-  # optimization flags for LOG, LOGGER ?
-  #set(CMAKE_${LANG}_FLAGS_RELEASE_INIT "-Os")
-  #set(CMAKE_${LANG}_FLAGS_DEBUG_INIT "-O0")
-endforeach ()
-
-# Linker
-list(JOIN TOOLCHAIN_EXE_LINKER_FLAGS " " CMAKE_EXE_LINKER_FLAGS_INIT)
diff --git a/examples/build_system/make/cpu/arm1176.mk b/examples/build_system/make/cpu/arm1176jzf-s.mk
index 022ccf7ad..022ccf7ad 100644
--- a/examples/build_system/make/cpu/arm1176.mk
+++ b/examples/build_system/make/cpu/arm1176jzf-s.mk
diff --git a/examples/build_system/make/cpu/arm926ej-s.mk b/examples/build_system/make/cpu/arm926ej-s.mk
new file mode 100644
index 000000000..5b84f514f
--- /dev/null
+++ b/examples/build_system/make/cpu/arm926ej-s.mk
@@ -0,0 +1,9 @@
+ifeq ($(TOOLCHAIN),gcc)
+  CFLAGS += \
+    -mcpu=arm926ej-s \
+
+else ifeq ($(TOOLCHAIN),iar)
+	#CFLAGS += --cpu cortex-a53
+	#ASFLAGS += --cpu cortex-a53
+
+endif
diff --git a/examples/build_system/make/cpu/cortex-m0.mk b/examples/build_system/make/cpu/cortex-m0.mk
index feb0f395b..c2c33a2ee 100644
--- a/examples/build_system/make/cpu/cortex-m0.mk
+++ b/examples/build_system/make/cpu/cortex-m0.mk
@@ -4,10 +4,18 @@ ifeq ($(TOOLCHAIN),gcc)
     -mcpu=cortex-m0 \
     -mfloat-abi=soft \
 
+else ifeq ($(TOOLCHAIN),clang)
+  CFLAGS += \
+	  --target=arm-none-eabi \
+	  -mcpu=cortex-m0 \
+
 else ifeq ($(TOOLCHAIN),iar)
   # IAR Flags
   CFLAGS += --cpu cortex-m0
   ASFLAGS += --cpu cortex-m0
+
+else
+  $(error "TOOLCHAIN is not supported")
 endif
 
 # For freeRTOS port source
diff --git a/examples/build_system/make/cpu/cortex-m0plus.mk b/examples/build_system/make/cpu/cortex-m0plus.mk
index b416b7a4a..fe8feb227 100644
--- a/examples/build_system/make/cpu/cortex-m0plus.mk
+++ b/examples/build_system/make/cpu/cortex-m0plus.mk
@@ -4,10 +4,18 @@ ifeq ($(TOOLCHAIN),gcc)
     -mcpu=cortex-m0plus \
     -mfloat-abi=soft \
 
+else ifeq ($(TOOLCHAIN),clang)
+  CFLAGS += \
+	  --target=arm-none-eabi \
+	  -mcpu=cortex-m0plus \
+
 else ifeq ($(TOOLCHAIN),iar)
   # IAR Flags
   CFLAGS += --cpu cortex-m0+
   ASFLAGS += --cpu cortex-m0+
+
+else
+  $(error "TOOLCHAIN is not supported")
 endif
 
 # For freeRTOS port source
diff --git a/examples/build_system/make/cpu/cortex-m23.mk b/examples/build_system/make/cpu/cortex-m23.mk
index 29542d8e8..7ab758352 100644
--- a/examples/build_system/make/cpu/cortex-m23.mk
+++ b/examples/build_system/make/cpu/cortex-m23.mk
@@ -4,10 +4,18 @@ ifeq ($(TOOLCHAIN),gcc)
     -mcpu=cortex-m23 \
     -mfloat-abi=soft \
 
+else ifeq ($(TOOLCHAIN),clang)
+  CFLAGS += \
+	  --target=arm-none-eabi \
+	  -mcpu=cortex-m23 \
+
 else ifeq ($(TOOLCHAIN),iar)
   # IAR Flags
   CFLAGS += --cpu cortex-m23
   ASFLAGS += --cpu cortex-m23
+
+else
+  $(error "TOOLCHAIN is not supported")
 endif
 
 # For freeRTOS port source
diff --git a/examples/build_system/make/cpu/cortex-m3.mk b/examples/build_system/make/cpu/cortex-m3.mk
index 7a34b9e04..b6325313f 100644
--- a/examples/build_system/make/cpu/cortex-m3.mk
+++ b/examples/build_system/make/cpu/cortex-m3.mk
@@ -4,13 +4,18 @@ ifeq ($(TOOLCHAIN),gcc)
     -mcpu=cortex-m3 \
     -mfloat-abi=soft \
 
+else ifeq ($(TOOLCHAIN),clang)
+  CFLAGS += \
+	  --target=arm-none-eabi \
+	  -mcpu=cortex-m3 \
+
 else ifeq ($(TOOLCHAIN),iar)
   # IAR Flags
-  CFLAGS += \
-    --cpu cortex-m3 \
+  CFLAGS += --cpu cortex-m3
+  ASFLAGS += --cpu cortex-m3
 
-  ASFLAGS += \
-     --cpu cortex-m3
+else
+  $(error "TOOLCHAIN is not supported")
 endif
 
 # For freeRTOS port source
diff --git a/examples/build_system/make/cpu/cortex-m33-nodsp-nofp.mk b/examples/build_system/make/cpu/cortex-m33-nodsp-nofp.mk
index c65f24376..405053dd0 100644
--- a/examples/build_system/make/cpu/cortex-m33-nodsp-nofp.mk
+++ b/examples/build_system/make/cpu/cortex-m33-nodsp-nofp.mk
@@ -1,16 +1,24 @@
 ifeq ($(TOOLCHAIN),gcc)
-	CFLAGS += \
+  CFLAGS += \
 	-mthumb \
 	-mcpu=cortex-m33+nodsp \
 	-mfloat-abi=soft \
 
+else ifeq ($(TOOLCHAIN),clang)
+  CFLAGS += \
+	  --target=arm-none-eabi \
+	  -mcpu=cortex-m33 \
+	  -mfpu=softvp \
+
 else ifeq ($(TOOLCHAIN),iar)
-	CFLAGS += \
+  CFLAGS += \
 		--cpu cortex-m33+nodsp \
 
-	ASFLAGS += \
+  ASFLAGS += \
 		--cpu cortex-m33+nodsp \
 
+else
+  $(error "TOOLCHAIN is not supported")
 endif
 
 FREERTOS_PORTABLE_SRC ?= $(FREERTOS_PORTABLE_PATH)/ARM_CM33_NTZ/non_secure
diff --git a/examples/build_system/make/cpu/cortex-m33.mk b/examples/build_system/make/cpu/cortex-m33.mk
index fe5b7b380..47b0eaecd 100644
--- a/examples/build_system/make/cpu/cortex-m33.mk
+++ b/examples/build_system/make/cpu/cortex-m33.mk
@@ -5,15 +5,23 @@ ifeq ($(TOOLCHAIN),gcc)
     -mfloat-abi=hard \
     -mfpu=fpv5-sp-d16 \
 
+else ifeq ($(TOOLCHAIN),clang)
+  CFLAGS += \
+	  --target=arm-none-eabi \
+	  -mcpu=cortex-m33 \
+	  -mfpu=fpv5-sp-d16 \
+
 else ifeq ($(TOOLCHAIN),iar)
-	CFLAGS += \
+  CFLAGS += \
 		--cpu cortex-m33 \
 		--fpu VFPv5-SP \
 
-	ASFLAGS += \
+  ASFLAGS += \
 		--cpu cortex-m33 \
 		--fpu VFPv5-SP \
 
+else
+  $(error "TOOLCHAIN is not supported")
 endif
 
 FREERTOS_PORTABLE_SRC ?= $(FREERTOS_PORTABLE_PATH)/ARM_CM33_NTZ/non_secure
diff --git a/examples/build_system/make/cpu/cortex-m4.mk b/examples/build_system/make/cpu/cortex-m4.mk
index d8776b5d8..4e16819d1 100644
--- a/examples/build_system/make/cpu/cortex-m4.mk
+++ b/examples/build_system/make/cpu/cortex-m4.mk
@@ -5,9 +5,18 @@ ifeq ($(TOOLCHAIN),gcc)
     -mfloat-abi=hard \
     -mfpu=fpv4-sp-d16 \
 
+else ifeq ($(TOOLCHAIN),clang)
+  CFLAGS += \
+	  --target=arm-none-eabi \
+	  -mcpu=cortex-m4 \
+	  -mfpu=fpv4-sp-d16 \
+
 else ifeq ($(TOOLCHAIN),iar)
   CFLAGS += --cpu cortex-m4 --fpu VFPv4
   ASFLAGS += --cpu cortex-m4 --fpu VFPv4
+
+else
+  $(error "TOOLCHAIN is not supported")
 endif
 
 FREERTOS_PORTABLE_SRC ?= $(FREERTOS_PORTABLE_PATH)/ARM_CM4F
diff --git a/examples/build_system/make/cpu/cortex-m7-fpsp.mk b/examples/build_system/make/cpu/cortex-m7-fpsp.mk
new file mode 100644
index 000000000..cd42c6fb8
--- /dev/null
+++ b/examples/build_system/make/cpu/cortex-m7-fpsp.mk
@@ -0,0 +1,27 @@
+ifeq ($(TOOLCHAIN),gcc)
+  CFLAGS += \
+    -mthumb \
+    -mcpu=cortex-m7 \
+    -mfloat-abi=hard \
+    -mfpu=fpv5-sp-d16 \
+
+else ifeq ($(TOOLCHAIN),clang)
+  CFLAGS += \
+	  --target=arm-none-eabi \
+	  -mcpu=cortex-m7 \
+	  -mfpu=fpv5-sp-d16 \
+
+else ifeq ($(TOOLCHAIN),iar)
+  CFLAGS += \
+  	--cpu cortex-m7 \
+  	--fpu VFPv5_sp \
+
+  ASFLAGS += \
+		--cpu cortex-m7 \
+		--fpu VFPv5_sp \
+
+else
+  $(error "TOOLCHAIN is not supported")
+endif
+
+FREERTOS_PORTABLE_SRC ?= $(FREERTOS_PORTABLE_PATH)/ARM_CM7/r0p1
diff --git a/examples/build_system/make/cpu/cortex-m7.mk b/examples/build_system/make/cpu/cortex-m7.mk
index 0e3461787..3e6116179 100644
--- a/examples/build_system/make/cpu/cortex-m7.mk
+++ b/examples/build_system/make/cpu/cortex-m7.mk
@@ -5,6 +5,12 @@ ifeq ($(TOOLCHAIN),gcc)
     -mfloat-abi=hard \
     -mfpu=fpv5-d16 \
 
+else ifeq ($(TOOLCHAIN),clang)
+  CFLAGS += \
+	  --target=arm-none-eabi \
+	  -mcpu=cortex-m7 \
+	  -mfpu=fpv5-d16 \
+
 else ifeq ($(TOOLCHAIN),iar)
   CFLAGS += \
   	--cpu cortex-m7 \
@@ -14,6 +20,8 @@ else ifeq ($(TOOLCHAIN),iar)
 		--cpu cortex-m7 \
 		--fpu VFPv5_D16 \
 
+else
+  $(error "TOOLCHAIN is not supported")
 endif
 
 FREERTOS_PORTABLE_SRC ?= $(FREERTOS_PORTABLE_PATH)/ARM_CM7/r0p1
diff --git a/examples/build_system/make/cpu/msp430.mk b/examples/build_system/make/cpu/msp430.mk
new file mode 100644
index 000000000..6daa2c38d
--- /dev/null
+++ b/examples/build_system/make/cpu/msp430.mk
@@ -0,0 +1,12 @@
+ifeq ($(TOOLCHAIN),gcc)
+  # nothing to add
+else ifeq ($(TOOLCHAIN),clang)
+  # nothing to add
+else ifeq ($(TOOLCHAIN),iar)
+  # nothing to add
+else
+  $(error "TOOLCHAIN is not supported")
+endif
+
+# For freeRTOS port source
+FREERTOS_PORTABLE_SRC ?= $(FREERTOS_PORTABLE_PATH)/GCC_MSP430F449
diff --git a/examples/build_system/make/cpu/rv32i-ilp32.mk b/examples/build_system/make/cpu/rv32i-ilp32.mk
new file mode 100644
index 000000000..af764afc5
--- /dev/null
+++ b/examples/build_system/make/cpu/rv32i-ilp32.mk
@@ -0,0 +1,16 @@
+ifeq ($(TOOLCHAIN),gcc)
+  CFLAGS += \
+    -march=rv32i_zicsr \
+    -mabi=ilp32 \
+
+else ifeq ($(TOOLCHAIN),clang)
+  CFLAGS += \
+    -march=rv32i_zicsr \
+    -mabi=ilp32 \
+
+else ifeq ($(TOOLCHAIN),iar)
+  $(error not support)
+endif
+
+# For freeRTOS port source
+FREERTOS_PORTABLE_SRC = $(FREERTOS_PORTABLE_PATH)/RISC-V
diff --git a/examples/build_system/make/cpu/rv32imac-ilp32.mk b/examples/build_system/make/cpu/rv32imac-ilp32.mk
new file mode 100644
index 000000000..19c322ebc
--- /dev/null
+++ b/examples/build_system/make/cpu/rv32imac-ilp32.mk
@@ -0,0 +1,17 @@
+ifeq ($(TOOLCHAIN),gcc)
+  CFLAGS += \
+    -march=rv32imac_zicsr \
+    -mabi=ilp32 \
+
+else ifeq ($(TOOLCHAIN),clang)
+  CFLAGS += \
+    -march=rv32imac_zicsr \
+    -mabi=ilp32 \
+
+else ifeq ($(TOOLCHAIN),iar)
+  $(error not support)
+
+endif
+
+# For freeRTOS port source
+FREERTOS_PORTABLE_SRC = $(FREERTOS_PORTABLE_PATH)/RISC-V
diff --git a/examples/build_system/make/make.mk b/examples/build_system/make/make.mk
index 772befca4..1500a51e0 100644
--- a/examples/build_system/make/make.mk
+++ b/examples/build_system/make/make.mk
@@ -2,6 +2,24 @@
 # Common make definition for all examples
 # ---------------------------------------
 
+#-------------------------------------------------------------
+# Toolchain
+# Can be changed via TOOLCHAIN=gcc|iar or CC=arm-none-eabi-gcc|iccarm|clang
+#-------------------------------------------------------------
+
+ifneq (,$(findstring clang,$(CC)))
+  TOOLCHAIN = clang
+else ifneq (,$(findstring iccarm,$(CC)))
+  TOOLCHAIN = iar
+else ifneq (,$(findstring gcc,$(CC)))
+  TOOLCHAIN = gcc
+endif
+
+# Default to GCC
+ifndef TOOLCHAIN
+  TOOLCHAIN = gcc
+endif
+
 #-------------- TOP and CURRENT_PATH ------------
 
 # Set TOP to be the path to get from the current directory (where make was invoked) to the top of the tree.
@@ -15,6 +33,8 @@ TOP = $(abspath $(subst make.mk,../../..,$(THIS_MAKEFILE)))
 # Set CURRENT_PATH to the relative path from TOP to the current directory, ie examples/device/cdc_msc_freertos
 CURRENT_PATH = $(subst $(TOP)/,,$(abspath .))
 
+#-------------- Linux/Windows ------------
+
 # Detect whether shell style is windows or not
 # https://stackoverflow.com/questions/714100/os-detecting-makefile/52062069#52062069
 ifeq '$(findstring ;,$(PATH))' ';'
@@ -26,13 +46,18 @@ CMDEXE := 1
 SHELL := cmd.exe
 endif
 
-# Handy check parameter function
-check_defined = \
-    $(strip $(foreach 1,$1, \
-    $(call __check_defined,$1,$(strip $(value 2)))))
-__check_defined = \
-    $(if $(value $1),, \
-    $(error Undefined make flag: $1$(if $2, ($2))))
+ifeq ($(CMDEXE),1)
+  CP = copy
+  RM = del
+  MKDIR = mkdir
+  PYTHON = python
+else
+  CP = cp
+  RM = rm
+  MKDIR = mkdir
+  PYTHON = python3
+endif
+
 
 # Build directory
 BUILD := _build/$(BOARD)
@@ -44,8 +69,8 @@ BIN := $(TOP)/_bin/$(BOARD)/$(notdir $(CURDIR))
 
 # Board without family
 ifneq ($(wildcard $(TOP)/hw/bsp/$(BOARD)/board.mk),)
-BOARD_PATH := hw/bsp/$(BOARD)
-FAMILY :=
+  BOARD_PATH := hw/bsp/$(BOARD)
+  FAMILY :=
 endif
 
 # Board within family
@@ -68,31 +93,6 @@ else
   SRC_C += $(subst $(TOP)/,,$(wildcard $(TOP)/$(FAMILY_PATH)/*.c))
 endif
 
-#-------------- Toolchain  ------------
-
-# Supported toolchain: gcc, iar
-TOOLCHAIN ?= gcc
-
-# Can be set by board, default to ARM GCC
-CROSS_COMPILE ?= arm-none-eabi-
-
-ifeq ($(TOOLCHAIN),iar)
-CC := iccarm
-USE_IAR = 1
-endif
-
-ifeq ($(CMDEXE),1)
-  CP = copy
-  RM = del
-  MKDIR = mkdir
-  PYTHON = python
-else
-  CP = cp
-  RM = rm
-  MKDIR = mkdir
-  PYTHON = python3
-endif
-
 #-------------- Source files and compiler flags --------------
 # tinyusb makefile
 include $(TOP)/src/tinyusb.mk
@@ -109,6 +109,10 @@ INC += \
 BOARD_UPPER = $(subst a,A,$(subst b,B,$(subst c,C,$(subst d,D,$(subst e,E,$(subst f,F,$(subst g,G,$(subst h,H,$(subst i,I,$(subst j,J,$(subst k,K,$(subst l,L,$(subst m,M,$(subst n,N,$(subst o,O,$(subst p,P,$(subst q,Q,$(subst r,R,$(subst s,S,$(subst t,T,$(subst u,U,$(subst v,V,$(subst w,W,$(subst x,X,$(subst y,Y,$(subst z,Z,$(subst -,_,$(BOARD))))))))))))))))))))))))))))
 CFLAGS += -DBOARD_$(BOARD_UPPER)
 
+ifdef CFLAGS_CLI
+	CFLAGS += $(CFLAGS_CLI)
+endif
+
 # use max3421 as host controller
 ifeq (${MAX3421_HOST},1)
   SRC_C += src/portable/analog/max3421/hcd_max3421.c
@@ -124,7 +128,7 @@ endif
 
 # Logger: default is uart, can be set to rtt or swo
 ifneq ($(LOGGER),)
-	CMAKE_DEFSYM +=	-DLOGGER=$(LOGGER)
+  CMAKE_DEFSYM +=	-DLOGGER=$(LOGGER)
 endif
 
 ifeq ($(LOGGER),rtt)
@@ -143,3 +147,11 @@ endif
 
 # toolchain specific
 include ${TOP}/examples/build_system/make/toolchain/arm_$(TOOLCHAIN).mk
+
+# Handy check parameter function
+check_defined = \
+    $(strip $(foreach 1,$1, \
+    $(call __check_defined,$1,$(strip $(value 2)))))
+__check_defined = \
+    $(if $(value $1),, \
+    $(error Undefined make flag: $1$(if $2, ($2))))
diff --git a/examples/build_system/make/rules.mk b/examples/build_system/make/rules.mk
index b02665cdd..f322dbae6 100644
--- a/examples/build_system/make/rules.mk
+++ b/examples/build_system/make/rules.mk
@@ -10,19 +10,6 @@
 ifeq (,$(findstring $(FAMILY),espressif rp2040))
 
 # ---------------------------------------
-# Compiler Flags
-# ---------------------------------------
-
-CFLAGS += $(addprefix -I,$(INC))
-
-# Verbose mode
-ifeq ("$(V)","1")
-$(info CFLAGS  $(CFLAGS) ) $(info )
-$(info LDFLAGS $(LDFLAGS)) $(info )
-$(info ASFLAGS $(ASFLAGS)) $(info )
-endif
-
-# ---------------------------------------
 # Rules
 # ---------------------------------------
 
@@ -37,7 +24,20 @@ vpath %.c . $(TOP)
 vpath %.s . $(TOP)
 vpath %.S . $(TOP)
 
-include ${TOP}/examples/build_system/make/toolchain/arm_$(TOOLCHAIN)_rules.mk
+include ${TOP}/examples/build_system/make/toolchain/$(TOOLCHAIN)_rules.mk
+
+# ---------------------------------------
+# Compiler Flags
+# ---------------------------------------
+
+CFLAGS += $(addprefix -I,$(INC))
+
+# Verbose mode
+ifeq ("$(V)","1")
+$(info CFLAGS  $(CFLAGS) ) $(info )
+$(info LDFLAGS $(LDFLAGS)) $(info )
+$(info ASFLAGS $(ASFLAGS)) $(info )
+endif
 
 
 OBJ_DIRS = $(sort $(dir $(OBJ)))
@@ -134,6 +134,23 @@ OPENOCD_OPTION ?=
 flash-openocd: $(BUILD)/$(PROJECT).elf
 	openocd $(OPENOCD_OPTION) -c "program $< verify reset exit"
 
+# --------------- openocd-wch -----------------
+# wch-linke is not supported yet in official openOCD yet. We need to either use
+# 1. download openocd as part of mounriver studio http://www.mounriver.com/download or
+# 2. compiled from https://github.com/hathach/riscv-openocd-wch or
+#    https://github.com/dragonlock2/miscboards/blob/main/wch/SDK/riscv-openocd.tar.xz
+#    with  ./configure --disable-werror --enable-wlinke --enable-ch347=no
+OPENOCD_WCH ?= /home/${USER}/app/riscv-openocd-wch/src/openocd
+OPENOCD_WCH_OPTION ?=
+flash-openocd-wch: $(BUILD)/$(PROJECT).elf
+	$(OPENOCD_WCH) $(OPENOCD_WCH_OPTION) -c init -c halt -c "flash write_image $<" -c reset -c exit
+
+# --------------- wlink-rs -----------------
+# flash with https://github.com/ch32-rs/wlink
+WLINK_RS ?= wlink
+flash-wlink-rs: $(BUILD)/$(PROJECT).elf
+	$(WLINK_RS) flash $<
+
 # --------------- dfu-util -----------------
 DFU_UTIL_OPTION ?= -a 0
 flash-dfu-util: $(BUILD)/$(PROJECT).bin
diff --git a/examples/build_system/make/toolchain/arm_clang.mk b/examples/build_system/make/toolchain/arm_clang.mk
new file mode 100644
index 000000000..97face39c
--- /dev/null
+++ b/examples/build_system/make/toolchain/arm_clang.mk
@@ -0,0 +1,10 @@
+CC = clang
+CXX = clang++
+AS = $(CC) -x assembler-with-cpp
+LD = $(CC)
+
+GDB = $(CROSS_COMPILE)gdb
+OBJCOPY = llvm-objcopy
+SIZE = llvm-size
+
+include ${TOP}/examples/build_system/make/toolchain/gcc_common.mk
diff --git a/examples/build_system/make/toolchain/arm_gcc.mk b/examples/build_system/make/toolchain/arm_gcc.mk
index ed5ddc970..a8576f8ee 100644
--- a/examples/build_system/make/toolchain/arm_gcc.mk
+++ b/examples/build_system/make/toolchain/arm_gcc.mk
@@ -1,5 +1,8 @@
 # makefile for arm gcc toolchain
 
+# Can be set by family, default to ARM GCC
+CROSS_COMPILE ?= arm-none-eabi-
+
 CC = $(CROSS_COMPILE)gcc
 CXX = $(CROSS_COMPILE)g++
 AS = $(CC) -x assembler-with-cpp
@@ -9,73 +12,9 @@ GDB = $(CROSS_COMPILE)gdb
 OBJCOPY = $(CROSS_COMPILE)objcopy
 SIZE = $(CROSS_COMPILE)size
 
-CC_VERSION := $(shell $(CC) -dumpversion)
-CC_VERSION_MAJOR = $(firstword $(subst ., ,$(CC_VERSION)))
-
-# ---------------------------------------
-# Compiler Flags
-# ---------------------------------------
 CFLAGS += \
-  -MD \
-  -ggdb \
-  -fdata-sections \
-  -ffunction-sections \
   -fsingle-precision-constant \
-  -fno-strict-aliasing \
-  -Wall \
-  -Wextra \
-  -Werror \
-  -Wfatal-errors \
-  -Wdouble-promotion \
-  -Wstrict-prototypes \
-  -Wstrict-overflow \
-  -Werror-implicit-function-declaration \
-  -Wfloat-equal \
-  -Wundef \
-  -Wshadow \
-  -Wwrite-strings \
-  -Wsign-compare \
-  -Wmissing-format-attribute \
-  -Wunreachable-code \
-  -Wcast-align \
-  -Wcast-function-type \
-  -Wcast-qual \
-  -Wnull-dereference \
-  -Wuninitialized \
-  -Wunused \
-  -Wreturn-type \
-  -Wredundant-decls \
-
-# conversion is too strict for most mcu driver, may be disable sign/int/arith-conversion
-#  -Wconversion
-
-# Size Optimization as default
-CFLAGS_OPTIMIZED ?= -Os
-
-# Debugging/Optimization
-ifeq ($(DEBUG), 1)
-  CFLAGS += -O0
-  NO_LTO = 1
-else
-  CFLAGS += $(CFLAGS_OPTIMIZED)
-endif
-
-# ---------------------------------------
-# Linker Flags
-# ---------------------------------------
-LDFLAGS += \
-  -Wl,[email protected] \
-  -Wl,-cref \
-  -Wl,-gc-sections \
 
-# renesas rx does not support --print-memory-usage flags
-ifneq ($(FAMILY),rx)
-LDFLAGS += -Wl,--print-memory-usage
-endif
+LIBS += -lgcc -lm -lnosys
 
-# from version 12
-ifeq ($(strip $(if $(CMDEXE),\
-               $(shell if $(CC_VERSION_MAJOR) geq 12 (echo 1) else (echo 0)),\
-               $(shell expr $(CC_VERSION_MAJOR) \>= 12))), 1)
-LDFLAGS += -Wl,--no-warn-rwx-segment
-endif
+include ${TOP}/examples/build_system/make/toolchain/gcc_common.mk
diff --git a/examples/build_system/make/toolchain/arm_iar.mk b/examples/build_system/make/toolchain/arm_iar.mk
index 04c9f22b3..17967b41a 100644
--- a/examples/build_system/make/toolchain/arm_iar.mk
+++ b/examples/build_system/make/toolchain/arm_iar.mk
@@ -1,4 +1,6 @@
 # makefile for arm iar toolchain
+
+CC = iccarm
 AS = iasmarm
 LD = ilinkarm
 OBJCOPY = ielftool --silent
diff --git a/examples/build_system/make/toolchain/clang_rules.mk b/examples/build_system/make/toolchain/clang_rules.mk
new file mode 100644
index 000000000..341f705b1
--- /dev/null
+++ b/examples/build_system/make/toolchain/clang_rules.mk
@@ -0,0 +1 @@
+include ${TOP}/examples/build_system/make/toolchain/gcc_rules.mk
diff --git a/examples/build_system/make/toolchain/gcc_common.mk b/examples/build_system/make/toolchain/gcc_common.mk
new file mode 100644
index 000000000..6986d8bba
--- /dev/null
+++ b/examples/build_system/make/toolchain/gcc_common.mk
@@ -0,0 +1,71 @@
+# ---------------------------------------
+# Compiler Flags
+# ---------------------------------------
+CFLAGS += \
+  -MD \
+  -ggdb \
+  -fdata-sections \
+  -ffunction-sections \
+  -fno-strict-aliasing \
+  -Wall \
+  -Wextra \
+  -Werror \
+  -Wfatal-errors \
+  -Wdouble-promotion \
+  -Wstrict-prototypes \
+  -Wstrict-overflow \
+  -Werror-implicit-function-declaration \
+  -Wfloat-equal \
+  -Wundef \
+  -Wshadow \
+  -Wwrite-strings \
+  -Wsign-compare \
+  -Wmissing-format-attribute \
+  -Wunreachable-code \
+  -Wcast-align \
+  -Wcast-function-type \
+  -Wcast-qual \
+  -Wnull-dereference \
+  -Wuninitialized \
+  -Wunused \
+  -Wreturn-type \
+  -Wredundant-decls \
+
+# conversion is too strict for most mcu driver, may be disable sign/int/arith-conversion
+#  -Wconversion
+
+# Size Optimization as default
+CFLAGS_OPTIMIZED ?= -Os
+
+# Debugging/Optimization
+ifeq ($(DEBUG), 1)
+  CFLAGS += -O0
+  NO_LTO = 1
+else
+  CFLAGS += $(CFLAGS_OPTIMIZED)
+endif
+
+# ---------------------------------------
+# Linker Flags
+# ---------------------------------------
+LDFLAGS += \
+  -Wl,[email protected] \
+  -Wl,--cref \
+  -Wl,-gc-sections \
+
+# renesas rx does not support --print-memory-usage flags
+ifneq ($(FAMILY),rx)
+LDFLAGS += -Wl,--print-memory-usage
+endif
+
+ifeq ($(TOOLCHAIN),gcc)
+CC_VERSION := $(shell $(CC) -dumpversion)
+CC_VERSION_MAJOR = $(firstword $(subst ., ,$(CC_VERSION)))
+
+# from version 12
+ifeq ($(strip $(if $(CMDEXE),\
+               $(shell if $(CC_VERSION_MAJOR) geq 12 (echo 1) else (echo 0)),\
+               $(shell expr $(CC_VERSION_MAJOR) \>= 12))), 1)
+LDFLAGS += -Wl,--no-warn-rwx-segment
+endif
+endif
diff --git a/examples/build_system/make/toolchain/arm_gcc_rules.mk b/examples/build_system/make/toolchain/gcc_rules.mk
index d295879d9..fc5225503 100644
--- a/examples/build_system/make/toolchain/arm_gcc_rules.mk
+++ b/examples/build_system/make/toolchain/gcc_rules.mk
@@ -21,8 +21,14 @@ ifneq ($(CFLAGS_SKIP),)
 CFLAGS := $(filter-out $(CFLAGS_SKIP),$(CFLAGS))
 endif
 
+ifeq ($(TOOLCHAIN),clang)
+CFLAGS += $(CFLAGS_CLANG)
+LDFLAGS += $(CFLAGS) $(LDFLAGS_CLANG)
+else
 LDFLAGS += $(CFLAGS) $(LDFLAGS_GCC)
+endif
 
+# TODO should be removed after all examples are updated
 ifdef LD_FILE
 LDFLAGS += -Wl,-T,$(TOP)/$(LD_FILE)
 endif
@@ -33,11 +39,7 @@ endif
 
 ASFLAGS += $(CFLAGS)
 
-LIBS_GCC ?= -lgcc -lm -lnosys
-
 # libc
-LIBS += $(LIBS_GCC)
-
 ifneq ($(BOARD), spresense)
 LIBS += -lc
 endif
diff --git a/examples/build_system/make/toolchain/arm_iar_rules.mk b/examples/build_system/make/toolchain/iar_rules.mk
index 2c066f6da..2c066f6da 100644
--- a/examples/build_system/make/toolchain/arm_iar_rules.mk
+++ b/examples/build_system/make/toolchain/iar_rules.mk
diff --git a/examples/build_system/make/toolchain/riscv_gcc.mk b/examples/build_system/make/toolchain/riscv_gcc.mk
new file mode 100644
index 000000000..843aff38c
--- /dev/null
+++ b/examples/build_system/make/toolchain/riscv_gcc.mk
@@ -0,0 +1,20 @@
+# makefile for arm gcc toolchain
+
+# Can be set by family, default to ARM GCC
+CROSS_COMPILE ?= riscv-none-embed-
+
+CC = $(CROSS_COMPILE)gcc
+CXX = $(CROSS_COMPILE)g++
+AS = $(CC) -x assembler-with-cpp
+LD = $(CC)
+
+GDB = $(CROSS_COMPILE)gdb
+OBJCOPY = $(CROSS_COMPILE)objcopy
+SIZE = $(CROSS_COMPILE)size
+
+CFLAGS += \
+  -fsingle-precision-constant \
+
+LIBS += -lgcc -lm -lnosys
+
+include ${TOP}/examples/build_system/make/toolchain/gcc_common.mk
diff --git a/examples/device/CMakeLists.txt b/examples/device/CMakeLists.txt
index c3671da69..638440795 100644
--- a/examples/device/CMakeLists.txt
+++ b/examples/device/CMakeLists.txt
@@ -8,6 +8,8 @@ family_initialize_project(tinyusb_device_examples ${CMAKE_CURRENT_LIST_DIR})
 # family_add_subdirectory will filter what to actually add based on selected FAMILY
 family_add_subdirectory(audio_4_channel_mic)
 family_add_subdirectory(audio_test)
+family_add_subdirectory(audio_4_channel_mic_freertos)
+family_add_subdirectory(audio_test_freertos)
 family_add_subdirectory(audio_test_multi_rate)
 family_add_subdirectory(board_test)
 family_add_subdirectory(cdc_dual_ports)
diff --git a/examples/device/audio_4_channel_mic/src/main.c b/examples/device/audio_4_channel_mic/src/main.c
index 1de4f9dac..10e6fe88a 100644
--- a/examples/device/audio_4_channel_mic/src/main.c
+++ b/examples/device/audio_4_channel_mic/src/main.c
@@ -104,39 +104,39 @@ int main(void)
   // Generate dummy data
 #if CFG_TUD_AUDIO_ENABLE_ENCODING
   uint16_t * p_buff = i2s_dummy_buffer[0];
-  uint16_t dataVal = 1;
+  uint16_t dataVal = 0;
   for (uint16_t cnt = 0; cnt < AUDIO_SAMPLE_RATE/1000; cnt++)
   {
     // CH0 saw wave
     *p_buff++ = dataVal;
     // CH1 inverted saw wave
-    *p_buff++ = 60 + AUDIO_SAMPLE_RATE/1000 - dataVal;
-    dataVal++;
+    *p_buff++ = 3200 + AUDIO_SAMPLE_RATE/1000 - dataVal;
+    dataVal+= 32;
   }
   p_buff = i2s_dummy_buffer[1];
   for (uint16_t cnt = 0; cnt < AUDIO_SAMPLE_RATE/1000; cnt++)
   {
     // CH3 square wave
-    *p_buff++ = cnt < (AUDIO_SAMPLE_RATE/1000/2) ? 120:170;
+    *p_buff++ = cnt < (AUDIO_SAMPLE_RATE/1000/2) ? 3400:5000;
     // CH4 sinus wave
     float t = 2*3.1415f * cnt / (AUDIO_SAMPLE_RATE/1000);
-    *p_buff++ = (uint16_t)(sinf(t) * 25) + 200;
+    *p_buff++ = (uint16_t)((int16_t)(sinf(t) * 750) + 6000);
   }
 #else
   uint16_t * p_buff = i2s_dummy_buffer;
-  uint16_t dataVal = 1;
+  uint16_t dataVal = 0;
   for (uint16_t cnt = 0; cnt < AUDIO_SAMPLE_RATE/1000; cnt++)
   {
     // CH0 saw wave
     *p_buff++ = dataVal;
     // CH1 inverted saw wave
-    *p_buff++ = 60 + AUDIO_SAMPLE_RATE/1000 - dataVal;
-    dataVal++;
+    *p_buff++ = 3200 + AUDIO_SAMPLE_RATE/1000 - dataVal;
+    dataVal+= 32;
     // CH3 square wave
-    *p_buff++ = cnt < (AUDIO_SAMPLE_RATE/1000/2) ? 120:170;
+    *p_buff++ = cnt < (AUDIO_SAMPLE_RATE/1000/2) ? 3400:5000;
     // CH4 sinus wave
     float t = 2*3.1415f * cnt / (AUDIO_SAMPLE_RATE/1000);
-    *p_buff++ = (uint16_t)(sinf(t) * 25) + 200;
+    *p_buff++ = (uint16_t)((int16_t)(sinf(t) * 750) + 6000);
   }
 #endif
 
diff --git a/examples/device/audio_4_channel_mic_freertos/CMakeLists.txt b/examples/device/audio_4_channel_mic_freertos/CMakeLists.txt
new file mode 100644
index 000000000..e8ca3751d
--- /dev/null
+++ b/examples/device/audio_4_channel_mic_freertos/CMakeLists.txt
@@ -0,0 +1,39 @@
+cmake_minimum_required(VERSION 3.17)
+
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/family_support.cmake)
+
+# gets PROJECT name for the example (e.g. <BOARD>-<DIR_NAME>)
+family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
+
+project(${PROJECT} C CXX ASM)
+
+# Checks this example is valid for the family and initializes the project
+family_initialize_project(${PROJECT} ${CMAKE_CURRENT_LIST_DIR})
+
+# Espressif has its own cmake build system
+if(FAMILY STREQUAL "espressif")
+  return()
+endif()
+
+add_executable(${PROJECT})
+
+# Example source
+target_sources(${PROJECT} PUBLIC
+  ${CMAKE_CURRENT_SOURCE_DIR}/src/freertos_hook.c
+  ${CMAKE_CURRENT_SOURCE_DIR}/src/main.c
+  ${CMAKE_CURRENT_SOURCE_DIR}/src/usb_descriptors.c
+  )
+
+# Example include
+target_include_directories(${PROJECT} PUBLIC
+  ${CMAKE_CURRENT_SOURCE_DIR}/src
+  )
+
+# Add libm for GCC
+if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
+  target_link_libraries(${PROJECT} PUBLIC m)
+endif()
+
+# Configure compilation flags and libraries for the example with FreeRTOS.
+# See the corresponding function in hw/bsp/FAMILY/family.cmake for details.
+family_configure_device_example(${PROJECT} freertos)
diff --git a/examples/device/audio_4_channel_mic_freertos/Makefile b/examples/device/audio_4_channel_mic_freertos/Makefile
new file mode 100644
index 000000000..df2cdef4e
--- /dev/null
+++ b/examples/device/audio_4_channel_mic_freertos/Makefile
@@ -0,0 +1,38 @@
+include ../../build_system/make/make.mk
+
+FREERTOS_SRC = lib/FreeRTOS-Kernel
+FREERTOS_PORTABLE_PATH = $(FREERTOS_SRC)/portable/$(if $(findstring iar,$(TOOLCHAIN)),IAR,GCC)
+
+INC += \
+	src \
+	src/FreeRTOSConfig \
+	$(TOP)/hw \
+	$(TOP)/$(FREERTOS_SRC)/include \
+	$(TOP)/$(FREERTOS_PORTABLE_SRC) \
+
+# Example source
+EXAMPLE_SOURCE = \
+	src/freertos_hook.c \
+	src/main.c \
+	src/usb_descriptors.c
+
+SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
+
+# FreeRTOS source, all files in port folder
+SRC_C += \
+	$(FREERTOS_SRC)/list.c \
+	$(FREERTOS_SRC)/queue.c \
+	$(FREERTOS_SRC)/tasks.c \
+	$(FREERTOS_SRC)/timers.c \
+	$(subst $(TOP)/,,$(wildcard $(TOP)/$(FREERTOS_PORTABLE_SRC)/*.c))
+
+SRC_S += \
+	$(subst $(TOP)/,,$(wildcard $(TOP)/$(FREERTOS_PORTABLE_SRC)/*.s))
+
+# Suppress FreeRTOS warnings
+CFLAGS += -Wno-error=cast-qual -Wno-error=redundant-decls
+
+# FreeRTOS (lto + Os) linker issue
+LDFLAGS += -Wl,--undefined=vTaskSwitchContext
+
+include ../../build_system/make/rules.mk
diff --git a/examples/device/audio_4_channel_mic_freertos/README.md b/examples/device/audio_4_channel_mic_freertos/README.md
new file mode 100644
index 000000000..a99f28bc3
--- /dev/null
+++ b/examples/device/audio_4_channel_mic_freertos/README.md
@@ -0,0 +1,19 @@
+# How to build example for Esp32s3
+1. Load idf environment variables (eg. using the esp-idf alias `get_idf` if configured)
+
+2. cd into examples directory
+```
+$ cd /tinyusb/examples/device/audio_4_channel_mic_freertos
+```
+
+3. Run cmake in project directory specifying the board
+```
+$ cmake -DBOARD=espressif_s3_devkitc -B build -G Ninja .
+$ ninja.exe -C build
+```
+
+4. Flash the binary onto the esp32-s3 by copy-paste of the full command output by the esp-idf build system replacing **(PORT)** with eg. /dev/ttyUSB0
+
+eg.
+
+> /home/kaspernyhus/.espressif/python_env/idf4.4_py3.8_env/bin/python ../../../../esp-idf/components/esptool_py/esptool/esptool.py -p /dev/ttyUSB0 -b 460800 --before default_reset --after hard_reset --chip esp32s3  write_flash --flash_mode dio --flash_size detect --flash_freq 80m 0x0 _build/espressif_s3_devkitc/bootloader/bootloader.bin 0x8000 _build/espressif_s3_devkitc/partition_table/partition-table.bin 0x10000 _build/espressif_s3_devkitc/audio_4_channel_mic_freertos.bin
diff --git a/examples/device/audio_4_channel_mic_freertos/sdkconfig.defaults b/examples/device/audio_4_channel_mic_freertos/sdkconfig.defaults
new file mode 100644
index 000000000..eaa9fb902
--- /dev/null
+++ b/examples/device/audio_4_channel_mic_freertos/sdkconfig.defaults
@@ -0,0 +1,4 @@
+CONFIG_IDF_CMAKE=y
+CONFIG_FREERTOS_HZ=1000
+CONFIG_FREERTOS_WATCHPOINT_END_OF_STACK=y
+CONFIG_FREERTOS_SUPPORT_STATIC_ALLOCATION=y
diff --git a/examples/device/audio_4_channel_mic_freertos/skip.txt b/examples/device/audio_4_channel_mic_freertos/skip.txt
new file mode 100644
index 000000000..012ca4e74
--- /dev/null
+++ b/examples/device/audio_4_channel_mic_freertos/skip.txt
@@ -0,0 +1,18 @@
+mcu:CH32V103
+mcu:CH32V20X
+mcu:CH32V307
+mcu:CXD56
+mcu:F1C100S
+mcu:GD32VF103
+mcu:MKL25ZXX
+mcu:MSP430x5xx
+mcu:RP2040
+mcu:SAMD11
+mcu:SAMX7X
+mcu:VALENTYUSB_EPTRI
+mcu:RAXXX
+mcu:STM32L0
+board:lpcxpresso11u37
+board:lpcxpresso1347
+family:broadcom_32bit
+family:broadcom_64bit
diff --git a/examples/device/audio_4_channel_mic_freertos/src/CMakeLists.txt b/examples/device/audio_4_channel_mic_freertos/src/CMakeLists.txt
new file mode 100644
index 000000000..cef2b46ee
--- /dev/null
+++ b/examples/device/audio_4_channel_mic_freertos/src/CMakeLists.txt
@@ -0,0 +1,4 @@
+# This file is for ESP-IDF only
+idf_component_register(SRCS "main.c" "usb_descriptors.c"
+                    INCLUDE_DIRS "."
+                    REQUIRES boards tinyusb_src)
diff --git a/examples/device/audio_4_channel_mic_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h b/examples/device/audio_4_channel_mic_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h
new file mode 100644
index 000000000..869500ad2
--- /dev/null
+++ b/examples/device/audio_4_channel_mic_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h
@@ -0,0 +1,191 @@
+/*
+ * FreeRTOS Kernel V10.0.0
+ * Copyright (C) 2017 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software. If you wish to use our Amazon
+ * FreeRTOS name, please do so in a fair use way that does not cause confusion.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * http://www.FreeRTOS.org
+ * http://aws.amazon.com/freertos
+ *
+ * 1 tab == 4 spaces!
+ */
+
+
+#ifndef FREERTOS_CONFIG_H
+#define FREERTOS_CONFIG_H
+
+/*-----------------------------------------------------------
+ * Application specific definitions.
+ *
+ * These definitions should be adjusted for your particular hardware and
+ * application requirements.
+ *
+ * THESE PARAMETERS ARE DESCRIBED WITHIN THE 'CONFIGURATION' SECTION OF THE
+ * FreeRTOS API DOCUMENTATION AVAILABLE ON THE FreeRTOS.org WEB SITE.
+ *
+ * See http://www.freertos.org/a00110.html.
+ *----------------------------------------------------------*/
+
+// skip if included from IAR assembler
+#ifndef __IASMARM__
+
+// Include MCU header
+#include "bsp/board_mcu.h"
+
+#if CFG_TUSB_MCU == OPT_MCU_ESP32S2 || CFG_TUSB_MCU == OPT_MCU_ESP32S3
+  #error "ESP32-Sx should use IDF's FreeRTOSConfig.h"
+#endif
+
+// TODO fix later
+#if CFG_TUSB_MCU == OPT_MCU_MM32F327X
+  extern u32 SystemCoreClock;
+#else
+  // FIXME cause redundant-decls warnings
+  extern uint32_t SystemCoreClock;
+#endif
+
+#endif
+
+/* Cortex M23/M33 port configuration. */
+#define configENABLE_MPU								        0
+#define configENABLE_FPU								        1
+#define configENABLE_TRUSTZONE					        0
+#define configMINIMAL_SECURE_STACK_SIZE					( 1024 )
+#define configRUN_FREERTOS_SECURE_ONLY          1
+
+#define configUSE_PREEMPTION                    1
+#define configUSE_PORT_OPTIMISED_TASK_SELECTION 0
+#define configCPU_CLOCK_HZ                      SystemCoreClock
+#define configTICK_RATE_HZ                      ( 1000 )
+#define configMAX_PRIORITIES                    ( 5 )
+#define configMINIMAL_STACK_SIZE                ( 128 )
+#define configTOTAL_HEAP_SIZE                   ( configSUPPORT_DYNAMIC_ALLOCATION*4*1024 )
+#define configMAX_TASK_NAME_LEN                 16
+#define configUSE_16_BIT_TICKS                  0
+#define configIDLE_SHOULD_YIELD                 1
+#define configUSE_MUTEXES                       1
+#define configUSE_RECURSIVE_MUTEXES             1
+#define configUSE_COUNTING_SEMAPHORES           1
+#define configQUEUE_REGISTRY_SIZE               4
+#define configUSE_QUEUE_SETS                    0
+#define configUSE_TIME_SLICING                  0
+#define configUSE_NEWLIB_REENTRANT              0
+#define configENABLE_BACKWARD_COMPATIBILITY     1
+#define configSTACK_ALLOCATION_FROM_SEPARATE_HEAP   0
+
+#define configSUPPORT_STATIC_ALLOCATION         1
+#define configSUPPORT_DYNAMIC_ALLOCATION        0
+
+/* Hook function related definitions. */
+#define configUSE_IDLE_HOOK                    0
+#define configUSE_TICK_HOOK                    0
+#define configUSE_MALLOC_FAILED_HOOK           0 // cause nested extern warning
+#define configCHECK_FOR_STACK_OVERFLOW         2
+#define configCHECK_HANDLER_INSTALLATION       0
+
+/* Run time and task stats gathering related definitions. */
+#define configGENERATE_RUN_TIME_STATS          0
+#define configUSE_TRACE_FACILITY               1 // legacy trace
+#define configUSE_STATS_FORMATTING_FUNCTIONS   0
+
+/* Co-routine definitions. */
+#define configUSE_CO_ROUTINES                  0
+#define configMAX_CO_ROUTINE_PRIORITIES        2
+
+/* Software timer related definitions. */
+#define configUSE_TIMERS                       1
+#define configTIMER_TASK_PRIORITY              (configMAX_PRIORITIES-2)
+#define configTIMER_QUEUE_LENGTH               32
+#define configTIMER_TASK_STACK_DEPTH           configMINIMAL_STACK_SIZE
+
+/* Optional functions - most linkers will remove unused functions anyway. */
+#define INCLUDE_vTaskPrioritySet               0
+#define INCLUDE_uxTaskPriorityGet              0
+#define INCLUDE_vTaskDelete                    0
+#define INCLUDE_vTaskSuspend                   1 // required for queue, semaphore, mutex to be blocked indefinitely with portMAX_DELAY
+#define INCLUDE_xResumeFromISR                 0
+#define INCLUDE_vTaskDelayUntil                1
+#define INCLUDE_vTaskDelay                     1
+#define INCLUDE_xTaskGetSchedulerState         0
+#define INCLUDE_xTaskGetCurrentTaskHandle      0
+#define INCLUDE_uxTaskGetStackHighWaterMark    0
+#define INCLUDE_xTaskGetIdleTaskHandle         0
+#define INCLUDE_xTimerGetTimerDaemonTaskHandle 0
+#define INCLUDE_pcTaskGetTaskName              0
+#define INCLUDE_eTaskGetState                  0
+#define INCLUDE_xEventGroupSetBitFromISR       0
+#define INCLUDE_xTimerPendFunctionCall         0
+
+#ifdef __RX__
+/* Renesas RX series */
+#define vSoftwareInterruptISR					        INT_Excep_ICU_SWINT
+#define vTickISR								              INT_Excep_CMT0_CMI0
+#define configPERIPHERAL_CLOCK_HZ				      (configCPU_CLOCK_HZ/2)
+#define configKERNEL_INTERRUPT_PRIORITY			  1
+#define configMAX_SYSCALL_INTERRUPT_PRIORITY	4
+
+#else
+
+/* FreeRTOS hooks to NVIC vectors */
+#define xPortPendSVHandler    PendSV_Handler
+#define xPortSysTickHandler   SysTick_Handler
+#define vPortSVCHandler       SVC_Handler
+
+//--------------------------------------------------------------------+
+// Interrupt nesting behavior configuration.
+//--------------------------------------------------------------------+
+#if defined(__NVIC_PRIO_BITS)
+  // For Cortex-M specific: __NVIC_PRIO_BITS is defined in core_cmx.h
+	#define configPRIO_BITS       __NVIC_PRIO_BITS
+
+#elif defined(__ECLIC_INTCTLBITS)
+  // RISC-V Bumblebee core from nuclei
+  #define configPRIO_BITS       __ECLIC_INTCTLBITS
+
+#elif defined(__IASMARM__)
+  // FIXME: IAR Assembler cannot include mcu header directly to get __NVIC_PRIO_BITS.
+  // Therefore we will hard coded it to minimum value of 2 to get pass ci build.
+  // IAR user must update this to correct value of the target MCU
+  #message "configPRIO_BITS is hard coded to 2 to pass IAR build only. User should update it per MCU"
+  #define configPRIO_BITS       2
+
+#else
+  #error "FreeRTOS configPRIO_BITS to be defined"
+#endif
+
+/* The lowest interrupt priority that can be used in a call to a "set priority" function. */
+#define configLIBRARY_LOWEST_INTERRUPT_PRIORITY			  ((1<<configPRIO_BITS) - 1)
+
+/* The highest interrupt priority that can be used by any interrupt service
+routine that makes calls to interrupt safe FreeRTOS API functions.  DO NOT CALL
+INTERRUPT SAFE FREERTOS API FUNCTIONS FROM ANY INTERRUPT THAT HAS A HIGHER
+PRIORITY THAN THIS! (higher priorities are lower numeric values. */
+#define configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY	2
+
+/* Interrupt priorities used by the kernel port layer itself.  These are generic
+to all Cortex-M ports, and do not rely on any particular library functions. */
+#define configKERNEL_INTERRUPT_PRIORITY 		          ( configLIBRARY_LOWEST_INTERRUPT_PRIORITY << (8 - configPRIO_BITS) )
+
+/* !!!! configMAX_SYSCALL_INTERRUPT_PRIORITY must not be set to zero !!!!
+See http://www.FreeRTOS.org/RTOS-Cortex-M3-M4.html. */
+#define configMAX_SYSCALL_INTERRUPT_PRIORITY 	        ( configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY << (8 - configPRIO_BITS) )
+
+#endif
+
+#endif /* __FREERTOS_CONFIG__H */
diff --git a/examples/device/audio_4_channel_mic_freertos/src/freertos_hook.c b/examples/device/audio_4_channel_mic_freertos/src/freertos_hook.c
new file mode 100644
index 000000000..4920e3fae
--- /dev/null
+++ b/examples/device/audio_4_channel_mic_freertos/src/freertos_hook.c
@@ -0,0 +1,115 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Ha Thach (tinyusb.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+
+//--------------------------------------------------------------------+
+// INCLUDE
+//--------------------------------------------------------------------+
+#include "FreeRTOS.h"
+#include "task.h"
+#include "common/tusb_common.h"
+
+
+void vApplicationMallocFailedHook(void)
+{
+  taskDISABLE_INTERRUPTS();
+  TU_ASSERT(false, );
+}
+
+void vApplicationStackOverflowHook(xTaskHandle pxTask, char *pcTaskName)
+{
+  (void) pxTask;
+  (void) pcTaskName;
+
+  taskDISABLE_INTERRUPTS();
+  TU_ASSERT(false, );
+}
+
+/* configSUPPORT_STATIC_ALLOCATION is set to 1, so the application must provide an
+ * implementation of vApplicationGetIdleTaskMemory() to provide the memory that is
+ * used by the Idle task. */
+void vApplicationGetIdleTaskMemory( StaticTask_t **ppxIdleTaskTCBBuffer, StackType_t **ppxIdleTaskStackBuffer, uint32_t *pulIdleTaskStackSize )
+{
+  /* If the buffers to be provided to the Idle task are declared inside this
+   * function then they must be declared static - otherwise they will be allocated on
+   * the stack and so not exists after this function exits. */
+  static StaticTask_t xIdleTaskTCB;
+  static StackType_t uxIdleTaskStack[ configMINIMAL_STACK_SIZE ];
+
+  /* Pass out a pointer to the StaticTask_t structure in which the Idle task's
+    state will be stored. */
+  *ppxIdleTaskTCBBuffer = &xIdleTaskTCB;
+
+  /* Pass out the array that will be used as the Idle task's stack. */
+  *ppxIdleTaskStackBuffer = uxIdleTaskStack;
+
+  /* Pass out the size of the array pointed to by *ppxIdleTaskStackBuffer.
+    Note that, as the array is necessarily of type StackType_t,
+    configMINIMAL_STACK_SIZE is specified in words, not bytes. */
+  *pulIdleTaskStackSize = configMINIMAL_STACK_SIZE;
+}
+
+/* configSUPPORT_STATIC_ALLOCATION and configUSE_TIMERS are both set to 1, so the
+ * application must provide an implementation of vApplicationGetTimerTaskMemory()
+ * to provide the memory that is used by the Timer service task. */
+void vApplicationGetTimerTaskMemory( StaticTask_t **ppxTimerTaskTCBBuffer, StackType_t **ppxTimerTaskStackBuffer, uint32_t *pulTimerTaskStackSize )
+{
+  /* If the buffers to be provided to the Timer task are declared inside this
+   * function then they must be declared static - otherwise they will be allocated on
+   * the stack and so not exists after this function exits. */
+  static StaticTask_t xTimerTaskTCB;
+  static StackType_t uxTimerTaskStack[ configTIMER_TASK_STACK_DEPTH ];
+
+  /* Pass out a pointer to the StaticTask_t structure in which the Timer
+    task's state will be stored. */
+  *ppxTimerTaskTCBBuffer = &xTimerTaskTCB;
+
+  /* Pass out the array that will be used as the Timer task's stack. */
+  *ppxTimerTaskStackBuffer = uxTimerTaskStack;
+
+  /* Pass out the size of the array pointed to by *ppxTimerTaskStackBuffer.
+    Note that, as the array is necessarily of type StackType_t,
+    configTIMER_TASK_STACK_DEPTH is specified in words, not bytes. */
+  *pulTimerTaskStackSize = configTIMER_TASK_STACK_DEPTH;
+}
+
+#if CFG_TUSB_MCU == OPT_MCU_RX63X | CFG_TUSB_MCU == OPT_MCU_RX65X
+#include "iodefine.h"
+void vApplicationSetupTimerInterrupt(void)
+{
+  /* Enable CMT0 */
+  unsigned short oldPRCR = SYSTEM.PRCR.WORD;
+  SYSTEM.PRCR.WORD = (0xA5u<<8) | TU_BIT(1);
+  MSTP(CMT0)       = 0;
+  SYSTEM.PRCR.WORD = (0xA5u<<8) | oldPRCR;
+
+  CMT0.CMCNT      = 0;
+  CMT0.CMCOR      = (unsigned short)(((configPERIPHERAL_CLOCK_HZ/configTICK_RATE_HZ)-1)/128);
+  CMT0.CMCR.WORD  = TU_BIT(6) | 2;
+  IR(CMT0, CMI0)  = 0;
+  IPR(CMT0, CMI0) = configKERNEL_INTERRUPT_PRIORITY;
+  IEN(CMT0, CMI0) = 1;
+  CMT.CMSTR0.BIT.STR0 = 1;
+}
+#endif
diff --git a/examples/device/audio_4_channel_mic_freertos/src/main.c b/examples/device/audio_4_channel_mic_freertos/src/main.c
new file mode 100644
index 000000000..08f49326c
--- /dev/null
+++ b/examples/device/audio_4_channel_mic_freertos/src/main.c
@@ -0,0 +1,580 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Reinhard Panhuber
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+
+/* plot_audio_samples.py requires following modules:
+ * $ sudo apt install libportaudio
+ * $ pip3 install sounddevice matplotlib
+ *
+ * Then run
+ * $ python3 plot_audio_samples.py
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <math.h>
+
+#include "bsp/board_api.h"
+#include "tusb.h"
+
+#if TUP_MCU_ESPRESSIF
+  // ESP-IDF need "freertos/" prefix in include path.
+  // CFG_TUSB_OS_INC_PATH should be defined accordingly.
+  #include "freertos/FreeRTOS.h"
+  #include "freertos/semphr.h"
+  #include "freertos/queue.h"
+  #include "freertos/task.h"
+  #include "freertos/timers.h"
+
+  #define USBD_STACK_SIZE     4096
+#else
+
+  #include "FreeRTOS.h"
+  #include "semphr.h"
+  #include "queue.h"
+  #include "task.h"
+  #include "timers.h"
+
+  // Increase stack size when debug log is enabled
+  #define USBD_STACK_SIZE    (4*configMINIMAL_STACK_SIZE/2) * (CFG_TUSB_DEBUG ? 2 : 1)
+#endif
+
+#define BLINKY_STACK_SIZE   configMINIMAL_STACK_SIZE
+#define AUDIO_STACK_SIZE    configMINIMAL_STACK_SIZE
+
+//--------------------------------------------------------------------+
+// MACRO CONSTANT TYPEDEF PROTYPES
+//--------------------------------------------------------------------+
+#define AUDIO_SAMPLE_RATE   CFG_TUD_AUDIO_FUNC_1_SAMPLE_RATE
+
+/* Blink pattern
+ * - 250 ms  : device not mounted
+ * - 1000 ms : device mounted
+ * - 2500 ms : device is suspended
+ */
+enum  {
+  BLINK_NOT_MOUNTED = 250,
+  BLINK_MOUNTED = 1000,
+  BLINK_SUSPENDED = 2500,
+};
+
+// static task
+#if configSUPPORT_STATIC_ALLOCATION
+StackType_t  blinky_stack[BLINKY_STACK_SIZE];
+StaticTask_t blinky_taskdef;
+
+StackType_t  usb_device_stack[USBD_STACK_SIZE];
+StaticTask_t usb_device_taskdef;
+
+StackType_t  audio_stack[AUDIO_STACK_SIZE];
+StaticTask_t audio_taskdef;
+#endif
+
+static uint32_t blink_interval_ms = BLINK_NOT_MOUNTED;
+
+// Audio controls
+// Current states
+bool mute[CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX + 1]; 				          // +1 for master channel 0
+uint16_t volume[CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX + 1]; 					// +1 for master channel 0
+uint32_t sampFreq;
+uint8_t clkValid;
+
+// Range states
+audio_control_range_2_n_t(1) volumeRng[CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX+1]; 			// Volume range state
+audio_control_range_4_n_t(1) sampleFreqRng; 						// Sample frequency range state
+
+#if CFG_TUD_AUDIO_ENABLE_ENCODING
+// Audio test data, each buffer contains 2 channels, buffer[0] for CH0-1, buffer[1] for CH1-2
+uint16_t i2s_dummy_buffer[CFG_TUD_AUDIO_FUNC_1_N_TX_SUPP_SW_FIFO][CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX*CFG_TUD_AUDIO_FUNC_1_SAMPLE_RATE/1000/CFG_TUD_AUDIO_FUNC_1_N_TX_SUPP_SW_FIFO];
+#else
+// Audio test data, 4 channels muxed together, buffer[0] for CH0, buffer[1] for CH1, buffer[2] for CH2, buffer[3] for CH3
+uint16_t i2s_dummy_buffer[CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX*CFG_TUD_AUDIO_FUNC_1_SAMPLE_RATE/1000];
+#endif
+
+void led_blinking_task(void* param);
+void usb_device_task(void* param);
+void audio_task(void* param);
+
+/*------------- MAIN -------------*/
+int main(void)
+{
+  board_init();
+
+  // Init values
+  sampFreq = AUDIO_SAMPLE_RATE;
+  clkValid = 1;
+
+  sampleFreqRng.wNumSubRanges = 1;
+  sampleFreqRng.subrange[0].bMin = AUDIO_SAMPLE_RATE;
+  sampleFreqRng.subrange[0].bMax = AUDIO_SAMPLE_RATE;
+  sampleFreqRng.subrange[0].bRes = 0;
+
+  // Generate dummy data
+#if CFG_TUD_AUDIO_ENABLE_ENCODING
+  uint16_t * p_buff = i2s_dummy_buffer[0];
+  uint16_t dataVal = 0;
+  for (uint16_t cnt = 0; cnt < AUDIO_SAMPLE_RATE/1000; cnt++)
+  {
+    // CH0 saw wave
+    *p_buff++ = dataVal;
+    // CH1 inverted saw wave
+    *p_buff++ = 3200 + AUDIO_SAMPLE_RATE/1000 - dataVal;
+    dataVal+= 32;
+  }
+  p_buff = i2s_dummy_buffer[1];
+  for (uint16_t cnt = 0; cnt < AUDIO_SAMPLE_RATE/1000; cnt++)
+  {
+    // CH3 square wave
+    *p_buff++ = cnt < (AUDIO_SAMPLE_RATE/1000/2) ? 3400:5000;
+    // CH4 sinus wave
+    float t = 2*3.1415f * cnt / (AUDIO_SAMPLE_RATE/1000);
+    *p_buff++ = (uint16_t)((int16_t)(sinf(t) * 750) + 6000);
+  }
+#else
+  uint16_t * p_buff = i2s_dummy_buffer;
+  uint16_t dataVal = 0;
+  for (uint16_t cnt = 0; cnt < AUDIO_SAMPLE_RATE/1000; cnt++)
+  {
+    // CH0 saw wave
+    *p_buff++ = dataVal;
+    // CH1 inverted saw wave
+    *p_buff++ = 3200 + AUDIO_SAMPLE_RATE/1000 - dataVal;
+    dataVal+= 32;
+    // CH3 square wave
+    *p_buff++ = cnt < (AUDIO_SAMPLE_RATE/1000/2) ? 3400:5000;
+    // CH4 sinus wave
+    float t = 2*3.1415f * cnt / (AUDIO_SAMPLE_RATE/1000);
+    *p_buff++ = (uint16_t)((int16_t)(sinf(t) * 750) + 6000);
+  }
+#endif
+
+#if configSUPPORT_STATIC_ALLOCATION
+  // blinky task
+  xTaskCreateStatic(led_blinking_task, "blinky", BLINKY_STACK_SIZE, NULL, 1, blinky_stack, &blinky_taskdef);
+
+  // Create a task for tinyusb device stack
+  xTaskCreateStatic(usb_device_task, "usbd", USBD_STACK_SIZE, NULL, configMAX_PRIORITIES-1, usb_device_stack, &usb_device_taskdef);
+
+   // Create a task for audio
+  xTaskCreateStatic(audio_task, "audio", AUDIO_STACK_SIZE, NULL, configMAX_PRIORITIES-1, audio_stack, &audio_taskdef);
+#else
+  xTaskCreate(led_blinking_task, "blinky", BLINKY_STACK_SIZE, NULL, 1, NULL);
+  xTaskCreate(usb_device_task, "usbd", USBD_STACK_SIZE, NULL, configMAX_PRIORITIES - 1, NULL);
+  xTaskCreate(audio_task, "audio", AUDIO_STACK_SIZE, NULL, configMAX_PRIORITIES - 1, NULL);
+#endif
+
+  // skip starting scheduler (and return) for ESP32-S2 or ESP32-S3
+  #if !TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
+    vTaskStartScheduler();
+  #endif
+
+  return 0;
+}
+
+#if TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
+void app_main(void)
+{
+  main();
+}
+#endif
+
+// USB Device Driver task
+// This top level thread process all usb events and invoke callbacks
+void usb_device_task(void* param)
+{
+  (void) param;
+
+  // init device stack on configured roothub port
+  // This should be called after scheduler/kernel is started.
+  // Otherwise it could cause kernel issue since USB IRQ handler does use RTOS queue API.
+  tud_init(BOARD_TUD_RHPORT);
+
+  if (board_init_after_tusb) {
+    board_init_after_tusb();
+  }
+
+  // RTOS forever loop
+  while (1)
+  {
+    // tinyusb device task
+    tud_task();
+  }
+}
+
+//--------------------------------------------------------------------+
+// Device callbacks
+//--------------------------------------------------------------------+
+
+// Invoked when device is mounted
+void tud_mount_cb(void)
+{
+  blink_interval_ms = BLINK_MOUNTED;
+}
+
+// Invoked when device is unmounted
+void tud_umount_cb(void)
+{
+  blink_interval_ms = BLINK_NOT_MOUNTED;
+}
+
+// Invoked when usb bus is suspended
+// remote_wakeup_en : if host allow us  to perform remote wakeup
+// Within 7ms, device must draw an average of current less than 2.5 mA from bus
+void tud_suspend_cb(bool remote_wakeup_en)
+{
+  (void) remote_wakeup_en;
+  blink_interval_ms = BLINK_SUSPENDED;
+}
+
+// Invoked when usb bus is resumed
+void tud_resume_cb(void)
+{
+  blink_interval_ms = tud_mounted() ? BLINK_MOUNTED : BLINK_NOT_MOUNTED;
+}
+
+//--------------------------------------------------------------------+
+// AUDIO Task
+//--------------------------------------------------------------------+
+
+void audio_task(void* param)
+{
+  (void) param;
+  // Yet to be filled - e.g. read audio from I2S buffer.
+  // Here we simulate a I2S receive callback every 1ms.
+  while (1) {
+    vTaskDelay(1);
+#if CFG_TUD_AUDIO_ENABLE_ENCODING
+  // Write I2S buffer into FIFO
+    for (uint8_t cnt=0; cnt < 2; cnt++)
+    {
+      tud_audio_write_support_ff(cnt, i2s_dummy_buffer[cnt], AUDIO_SAMPLE_RATE/1000 * CFG_TUD_AUDIO_FUNC_1_N_BYTES_PER_SAMPLE_TX * CFG_TUD_AUDIO_FUNC_1_CHANNEL_PER_FIFO_TX);
+    }
+#else
+    tud_audio_write(i2s_dummy_buffer, AUDIO_SAMPLE_RATE/1000 * CFG_TUD_AUDIO_FUNC_1_N_BYTES_PER_SAMPLE_TX * CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX);
+#endif
+  }
+}
+
+//--------------------------------------------------------------------+
+// Application Callback API Implementations
+//--------------------------------------------------------------------+
+
+// Invoked when audio class specific set request received for an EP
+bool tud_audio_set_req_ep_cb(uint8_t rhport, tusb_control_request_t const * p_request, uint8_t *pBuff)
+{
+  (void) rhport;
+  (void) pBuff;
+
+  // We do not support any set range requests here, only current value requests
+  TU_VERIFY(p_request->bRequest == AUDIO_CS_REQ_CUR);
+
+  // Page 91 in UAC2 specification
+  uint8_t channelNum = TU_U16_LOW(p_request->wValue);
+  uint8_t ctrlSel = TU_U16_HIGH(p_request->wValue);
+  uint8_t ep = TU_U16_LOW(p_request->wIndex);
+
+  (void) channelNum; (void) ctrlSel; (void) ep;
+
+  return false; 	// Yet not implemented
+}
+
+// Invoked when audio class specific set request received for an interface
+bool tud_audio_set_req_itf_cb(uint8_t rhport, tusb_control_request_t const * p_request, uint8_t *pBuff)
+{
+  (void) rhport;
+  (void) pBuff;
+
+  // We do not support any set range requests here, only current value requests
+  TU_VERIFY(p_request->bRequest == AUDIO_CS_REQ_CUR);
+
+  // Page 91 in UAC2 specification
+  uint8_t channelNum = TU_U16_LOW(p_request->wValue);
+  uint8_t ctrlSel = TU_U16_HIGH(p_request->wValue);
+  uint8_t itf = TU_U16_LOW(p_request->wIndex);
+
+  (void) channelNum; (void) ctrlSel; (void) itf;
+
+  return false; 	// Yet not implemented
+}
+
+// Invoked when audio class specific set request received for an entity
+bool tud_audio_set_req_entity_cb(uint8_t rhport, tusb_control_request_t const * p_request, uint8_t *pBuff)
+{
+  (void) rhport;
+
+  // Page 91 in UAC2 specification
+  uint8_t channelNum = TU_U16_LOW(p_request->wValue);
+  uint8_t ctrlSel = TU_U16_HIGH(p_request->wValue);
+  uint8_t itf = TU_U16_LOW(p_request->wIndex);
+  uint8_t entityID = TU_U16_HIGH(p_request->wIndex);
+
+  (void) itf;
+
+  // We do not support any set range requests here, only current value requests
+  TU_VERIFY(p_request->bRequest == AUDIO_CS_REQ_CUR);
+
+  // If request is for our feature unit
+  if ( entityID == 2 )
+  {
+    switch ( ctrlSel )
+    {
+      case AUDIO_FU_CTRL_MUTE:
+        // Request uses format layout 1
+        TU_VERIFY(p_request->wLength == sizeof(audio_control_cur_1_t));
+
+        mute[channelNum] = ((audio_control_cur_1_t*) pBuff)->bCur;
+
+        TU_LOG2("    Set Mute: %d of channel: %u\r\n", mute[channelNum], channelNum);
+      return true;
+
+      case AUDIO_FU_CTRL_VOLUME:
+        // Request uses format layout 2
+        TU_VERIFY(p_request->wLength == sizeof(audio_control_cur_2_t));
+
+        volume[channelNum] = ((audio_control_cur_2_t*) pBuff)->bCur;
+
+        TU_LOG2("    Set Volume: %d dB of channel: %u\r\n", volume[channelNum], channelNum);
+      return true;
+
+        // Unknown/Unsupported control
+      default:
+        TU_BREAKPOINT();
+      return false;
+    }
+  }
+  return false;    // Yet not implemented
+}
+
+// Invoked when audio class specific get request received for an EP
+bool tud_audio_get_req_ep_cb(uint8_t rhport, tusb_control_request_t const * p_request)
+{
+  (void) rhport;
+
+  // Page 91 in UAC2 specification
+  uint8_t channelNum = TU_U16_LOW(p_request->wValue);
+  uint8_t ctrlSel = TU_U16_HIGH(p_request->wValue);
+  uint8_t ep = TU_U16_LOW(p_request->wIndex);
+
+  (void) channelNum; (void) ctrlSel; (void) ep;
+
+  return false; 	// Yet not implemented
+}
+
+// Invoked when audio class specific get request received for an interface
+bool tud_audio_get_req_itf_cb(uint8_t rhport, tusb_control_request_t const * p_request)
+{
+  (void) rhport;
+
+  // Page 91 in UAC2 specification
+  uint8_t channelNum = TU_U16_LOW(p_request->wValue);
+  uint8_t ctrlSel = TU_U16_HIGH(p_request->wValue);
+  uint8_t itf = TU_U16_LOW(p_request->wIndex);
+
+  (void) channelNum; (void) ctrlSel; (void) itf;
+
+  return false; 	// Yet not implemented
+}
+
+// Invoked when audio class specific get request received for an entity
+bool tud_audio_get_req_entity_cb(uint8_t rhport, tusb_control_request_t const * p_request)
+{
+  (void) rhport;
+
+  // Page 91 in UAC2 specification
+  uint8_t channelNum = TU_U16_LOW(p_request->wValue);
+  uint8_t ctrlSel = TU_U16_HIGH(p_request->wValue);
+  // uint8_t itf = TU_U16_LOW(p_request->wIndex); 			// Since we have only one audio function implemented, we do not need the itf value
+  uint8_t entityID = TU_U16_HIGH(p_request->wIndex);
+
+  // Input terminal (Microphone input)
+  if (entityID == 1)
+  {
+    switch ( ctrlSel )
+    {
+      case AUDIO_TE_CTRL_CONNECTOR:
+      {
+        // The terminal connector control only has a get request with only the CUR attribute.
+        audio_desc_channel_cluster_t ret;
+
+        // Those are dummy values for now
+        ret.bNrChannels = 1;
+        ret.bmChannelConfig = 0;
+        ret.iChannelNames = 0;
+
+        TU_LOG2("    Get terminal connector\r\n");
+
+        return tud_audio_buffer_and_schedule_control_xfer(rhport, p_request, (void*) &ret, sizeof(ret));
+      }
+      break;
+
+        // Unknown/Unsupported control selector
+      default:
+        TU_BREAKPOINT();
+        return false;
+    }
+  }
+
+  // Feature unit
+  if (entityID == 2)
+  {
+    switch ( ctrlSel )
+    {
+      case AUDIO_FU_CTRL_MUTE:
+        // Audio control mute cur parameter block consists of only one byte - we thus can send it right away
+        // There does not exist a range parameter block for mute
+        TU_LOG2("    Get Mute of channel: %u\r\n", channelNum);
+        return tud_control_xfer(rhport, p_request, &mute[channelNum], 1);
+
+      case AUDIO_FU_CTRL_VOLUME:
+        switch ( p_request->bRequest )
+        {
+          case AUDIO_CS_REQ_CUR:
+            TU_LOG2("    Get Volume of channel: %u\r\n", channelNum);
+            return tud_control_xfer(rhport, p_request, &volume[channelNum], sizeof(volume[channelNum]));
+
+          case AUDIO_CS_REQ_RANGE:
+            TU_LOG2("    Get Volume range of channel: %u\r\n", channelNum);
+
+            // Copy values - only for testing - better is version below
+            audio_control_range_2_n_t(1)
+            ret;
+
+            ret.wNumSubRanges = 1;
+            ret.subrange[0].bMin = -90;           // -90 dB
+            ret.subrange[0].bMax = 90;		// +90 dB
+            ret.subrange[0].bRes = 1; 		// 1 dB steps
+
+            return tud_audio_buffer_and_schedule_control_xfer(rhport, p_request, (void*) &ret, sizeof(ret));
+
+            // Unknown/Unsupported control
+          default:
+            TU_BREAKPOINT();
+            return false;
+        }
+      break;
+
+        // Unknown/Unsupported control
+      default:
+        TU_BREAKPOINT();
+        return false;
+    }
+  }
+
+  // Clock Source unit
+  if ( entityID == 4 )
+  {
+    switch ( ctrlSel )
+    {
+      case AUDIO_CS_CTRL_SAM_FREQ:
+        // channelNum is always zero in this case
+        switch ( p_request->bRequest )
+        {
+          case AUDIO_CS_REQ_CUR:
+            TU_LOG2("    Get Sample Freq.\r\n");
+            // Buffered control transfer is needed for IN flow control to work
+            return tud_audio_buffer_and_schedule_control_xfer(rhport, p_request, &sampFreq, sizeof(sampFreq));
+
+          case AUDIO_CS_REQ_RANGE:
+            TU_LOG2("    Get Sample Freq. range\r\n");
+            return tud_control_xfer(rhport, p_request, &sampleFreqRng, sizeof(sampleFreqRng));
+
+           // Unknown/Unsupported control
+          default:
+            TU_BREAKPOINT();
+            return false;
+        }
+      break;
+
+      case AUDIO_CS_CTRL_CLK_VALID:
+        // Only cur attribute exists for this request
+        TU_LOG2("    Get Sample Freq. valid\r\n");
+        return tud_control_xfer(rhport, p_request, &clkValid, sizeof(clkValid));
+
+      // Unknown/Unsupported control
+      default:
+        TU_BREAKPOINT();
+        return false;
+    }
+  }
+
+  TU_LOG2("  Unsupported entity: %d\r\n", entityID);
+  return false; 	// Yet not implemented
+}
+
+bool tud_audio_tx_done_pre_load_cb(uint8_t rhport, uint8_t itf, uint8_t ep_in, uint8_t cur_alt_setting)
+{
+  (void) rhport;
+  (void) itf;
+  (void) ep_in;
+  (void) cur_alt_setting;
+
+
+  // In read world application data flow is driven by I2S clock,
+  // both tud_audio_tx_done_pre_load_cb() & tud_audio_tx_done_post_load_cb() are hardly used.
+  // For example in your I2S receive callback:
+  // void I2S_Rx_Callback(int channel, const void* data, uint16_t samples)
+  // {
+  //    tud_audio_write_support_ff(channel, data, samples * N_BYTES_PER_SAMPLE * N_CHANNEL_PER_FIFO);
+  // }
+
+  return true;
+}
+
+bool tud_audio_tx_done_post_load_cb(uint8_t rhport, uint16_t n_bytes_copied, uint8_t itf, uint8_t ep_in, uint8_t cur_alt_setting)
+{
+  (void) rhport;
+  (void) n_bytes_copied;
+  (void) itf;
+  (void) ep_in;
+  (void) cur_alt_setting;
+
+  return true;
+}
+
+bool tud_audio_set_itf_close_EP_cb(uint8_t rhport, tusb_control_request_t const * p_request)
+{
+  (void) rhport;
+  (void) p_request;
+
+  return true;
+}
+
+///--------------------------------------------------------------------+
+// BLINKING TASK
+//--------------------------------------------------------------------+
+void led_blinking_task(void* param) {
+  (void) param;
+  static uint32_t start_ms = 0;
+  static bool led_state = false;
+
+  while (1) {
+    // Blink every interval ms
+    vTaskDelay(blink_interval_ms / portTICK_PERIOD_MS);
+    start_ms += blink_interval_ms;
+
+    board_led_write(led_state);
+    led_state = 1 - led_state; // toggle
+  }
+}
diff --git a/examples/device/audio_4_channel_mic_freertos/src/plot_audio_samples.py b/examples/device/audio_4_channel_mic_freertos/src/plot_audio_samples.py
new file mode 100644
index 000000000..8312b4e28
--- /dev/null
+++ b/examples/device/audio_4_channel_mic_freertos/src/plot_audio_samples.py
@@ -0,0 +1,33 @@
+import sounddevice as sd
+import matplotlib.pyplot as plt
+import numpy as np
+import platform
+
+if __name__ == '__main__':
+
+    # If you got "ValueError: No input device matching", that is because your PC name example device
+    # differently from tested list below. Uncomment the next line to see full list and try to pick correct one
+    # print(sd.query_devices())
+
+    fs = 48000  		# Sample rate
+    duration = 100e-3   # Duration of recording
+
+    if platform.system() == 'Windows':
+        # WDM-KS is needed since there are more than one MicNode device APIs (at least in Windows)
+        device = 'Microphone (MicNode_4_Ch), Windows WDM-KS'
+    elif platform.system() == 'Darwin':
+        device = 'MicNode_4_Ch'
+    else:
+        device ='default'
+
+    myrecording = sd.rec(int(duration * fs), samplerate=fs, channels=4, dtype='int16', device=device)
+    print('Waiting...')
+    sd.wait()  # Wait until recording is finished
+    print('Done!')
+
+    time = np.arange(0, duration, 1 / fs)  # time vector
+    plt.plot(time, myrecording)
+    plt.xlabel('Time [s]')
+    plt.ylabel('Amplitude')
+    plt.title('MicNode 4 Channel')
+    plt.show()
diff --git a/examples/device/audio_4_channel_mic_freertos/src/tusb_config.h b/examples/device/audio_4_channel_mic_freertos/src/tusb_config.h
new file mode 100644
index 000000000..88f20278b
--- /dev/null
+++ b/examples/device/audio_4_channel_mic_freertos/src/tusb_config.h
@@ -0,0 +1,148 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Ha Thach (tinyusb.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+
+#ifndef _TUSB_CONFIG_H_
+#define _TUSB_CONFIG_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+//--------------------------------------------------------------------+
+// Board Specific Configuration
+//--------------------------------------------------------------------+
+
+// RHPort number used for device can be defined by board.mk, default to port 0
+#ifndef BOARD_TUD_RHPORT
+#define BOARD_TUD_RHPORT      0
+#endif
+
+// RHPort max operational speed can defined by board.mk
+#ifndef BOARD_TUD_MAX_SPEED
+#define BOARD_TUD_MAX_SPEED   OPT_MODE_DEFAULT_SPEED
+#endif
+
+//--------------------------------------------------------------------
+// COMMON CONFIGURATION
+//--------------------------------------------------------------------
+
+// defined by compiler flags for flexibility
+#ifndef CFG_TUSB_MCU
+#error CFG_TUSB_MCU must be defined
+#endif
+
+// This examples use FreeRTOS
+#ifndef CFG_TUSB_OS
+#define CFG_TUSB_OS           OPT_OS_FREERTOS
+#endif
+
+// Espressif IDF requires "freertos/" prefix in include path
+#if TUP_MCU_ESPRESSIF
+#define CFG_TUSB_OS_INC_PATH  freertos/
+#endif
+
+#ifndef CFG_TUSB_DEBUG
+#define CFG_TUSB_DEBUG            0
+#endif
+
+// Enable Device stack
+#define CFG_TUD_ENABLED           1
+
+// Default is max speed that hardware controller could support with on-chip PHY
+#define CFG_TUD_MAX_SPEED         BOARD_TUD_MAX_SPEED
+
+/* USB DMA on some MCUs can only access a specific SRAM region with restriction on alignment.
+ * Tinyusb use follows macros to declare transferring memory so that they can be put
+ * into those specific section.
+ * e.g
+ * - CFG_TUSB_MEM SECTION : __attribute__ (( section(".usb_ram") ))
+ * - CFG_TUSB_MEM_ALIGN   : __attribute__ ((aligned(4)))
+ */
+#ifndef CFG_TUSB_MEM_SECTION
+#define CFG_TUSB_MEM_SECTION
+#endif
+
+#ifndef CFG_TUSB_MEM_ALIGN
+#define CFG_TUSB_MEM_ALIGN        __attribute__ ((aligned(4)))
+#endif
+
+//--------------------------------------------------------------------
+// DEVICE CONFIGURATION
+//--------------------------------------------------------------------
+
+#ifndef CFG_TUD_ENDPOINT0_SIZE
+#define CFG_TUD_ENDPOINT0_SIZE    64
+#endif
+
+//------------- CLASS -------------//
+#define CFG_TUD_AUDIO             1
+#define CFG_TUD_CDC               0
+#define CFG_TUD_MSC               0
+#define CFG_TUD_HID               0
+#define CFG_TUD_MIDI              0
+#define CFG_TUD_VENDOR            0
+
+//--------------------------------------------------------------------
+// AUDIO CLASS DRIVER CONFIGURATION
+//--------------------------------------------------------------------
+
+// Have a look into audio_device.h for all configurations
+#define CFG_TUD_AUDIO_FUNC_1_SAMPLE_RATE              48000
+
+#define CFG_TUD_AUDIO_FUNC_1_DESC_LEN                 TUD_AUDIO_MIC_FOUR_CH_DESC_LEN
+
+#define CFG_TUD_AUDIO_FUNC_1_N_AS_INT                 1
+#define CFG_TUD_AUDIO_FUNC_1_CTRL_BUF_SZ              64
+
+#define CFG_TUD_AUDIO_ENABLE_EP_IN                    1
+#define CFG_TUD_AUDIO_FUNC_1_N_BYTES_PER_SAMPLE_TX    2         // This value is not required by the driver, it parses this information from the descriptor once the alternate interface is set by the host - we use it for the setup
+#define CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX            4         // This value is not required by the driver, it parses this information from the descriptor once the alternate interface is set by the host - we use it for the setup
+#define CFG_TUD_AUDIO_EP_SZ_IN                        TUD_AUDIO_EP_SIZE(CFG_TUD_AUDIO_FUNC_1_SAMPLE_RATE, CFG_TUD_AUDIO_FUNC_1_N_BYTES_PER_SAMPLE_TX, CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX)
+
+#define CFG_TUD_AUDIO_ENABLE_ENCODING                 1
+#define CFG_TUD_AUDIO_EP_IN_FLOW_CONTROL              1
+
+#if CFG_TUD_AUDIO_ENABLE_ENCODING
+
+#define CFG_TUD_AUDIO_FUNC_1_EP_IN_SZ_MAX             CFG_TUD_AUDIO_EP_SZ_IN
+#define CFG_TUD_AUDIO_FUNC_1_EP_IN_SW_BUF_SZ          CFG_TUD_AUDIO_EP_SZ_IN
+
+#define CFG_TUD_AUDIO_ENABLE_TYPE_I_ENCODING          1
+#define CFG_TUD_AUDIO_FUNC_1_CHANNEL_PER_FIFO_TX      2         // One I2S stream contains two channels, each stream is saved within one support FIFO - this value is currently fixed, the driver does not support a changing value
+#define CFG_TUD_AUDIO_FUNC_1_N_TX_SUPP_SW_FIFO        (CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX / CFG_TUD_AUDIO_FUNC_1_CHANNEL_PER_FIFO_TX)
+#define CFG_TUD_AUDIO_FUNC_1_TX_SUPP_SW_FIFO_SZ       (TUD_OPT_HIGH_SPEED ? 32 : 4) * (CFG_TUD_AUDIO_EP_SZ_IN / CFG_TUD_AUDIO_FUNC_1_N_TX_SUPP_SW_FIFO) // Example write FIFO every 1ms, so it should be 8 times larger for HS device
+
+#else
+
+#define CFG_TUD_AUDIO_FUNC_1_EP_IN_SZ_MAX             CFG_TUD_AUDIO_EP_SZ_IN
+#define CFG_TUD_AUDIO_FUNC_1_EP_IN_SW_BUF_SZ          (TUD_OPT_HIGH_SPEED ? 32 : 4) * CFG_TUD_AUDIO_EP_SZ_IN // Example write FIFO every 1ms, so it should be 8 times larger for HS device
+
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _TUSB_CONFIG_H_ */
diff --git a/examples/device/audio_4_channel_mic_freertos/src/usb_descriptors.c b/examples/device/audio_4_channel_mic_freertos/src/usb_descriptors.c
new file mode 100644
index 000000000..728a5f9ce
--- /dev/null
+++ b/examples/device/audio_4_channel_mic_freertos/src/usb_descriptors.c
@@ -0,0 +1,179 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Ha Thach (tinyusb.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+
+#include "bsp/board_api.h"
+#include "tusb.h"
+
+/* A combination of interfaces must have a unique product id, since PC will save device driver after the first plug.
+ * Same VID/PID with different interface e.g MSC (first), then CDC (later) will possibly cause system error on PC.
+ *
+ * Auto ProductID layout's Bitmap:
+ *   [MSB]     AUDIO | MIDI | HID | MSC | CDC          [LSB]
+ */
+#define _PID_MAP(itf, n)  ( (CFG_TUD_##itf) << (n) )
+#define USB_PID           (0x4000 | _PID_MAP(CDC, 0) | _PID_MAP(MSC, 1) | _PID_MAP(HID, 2) | \
+    _PID_MAP(MIDI, 3) | _PID_MAP(AUDIO, 4) | _PID_MAP(VENDOR, 5) )
+
+//--------------------------------------------------------------------+
+// Device Descriptors
+//--------------------------------------------------------------------+
+tusb_desc_device_t const desc_device =
+{
+    .bLength            = sizeof(tusb_desc_device_t),
+    .bDescriptorType    = TUSB_DESC_DEVICE,
+    .bcdUSB             = 0x0200,
+
+    // Use Interface Association Descriptor (IAD) for Audio
+    // As required by USB Specs IAD's subclass must be common class (2) and protocol must be IAD (1)
+    .bDeviceClass       = TUSB_CLASS_MISC,
+    .bDeviceSubClass    = MISC_SUBCLASS_COMMON,
+    .bDeviceProtocol    = MISC_PROTOCOL_IAD,
+    .bMaxPacketSize0    = CFG_TUD_ENDPOINT0_SIZE,
+
+    .idVendor           = 0xCafe,
+    .idProduct          = USB_PID,
+    .bcdDevice          = 0x0100,
+
+    .iManufacturer      = 0x01,
+    .iProduct           = 0x02,
+    .iSerialNumber      = 0x03,
+
+    .bNumConfigurations = 0x01
+};
+
+// Invoked when received GET DEVICE DESCRIPTOR
+// Application return pointer to descriptor
+uint8_t const * tud_descriptor_device_cb(void)
+{
+  return (uint8_t const *) &desc_device;
+}
+
+//--------------------------------------------------------------------+
+// Configuration Descriptor
+//--------------------------------------------------------------------+
+enum
+{
+  ITF_NUM_AUDIO_CONTROL = 0,
+  ITF_NUM_AUDIO_STREAMING,
+  ITF_NUM_TOTAL
+};
+
+#define CONFIG_TOTAL_LEN    	(TUD_CONFIG_DESC_LEN + CFG_TUD_AUDIO * TUD_AUDIO_MIC_FOUR_CH_DESC_LEN)
+
+#if TU_CHECK_MCU(OPT_MCU_LPC175X_6X, OPT_MCU_LPC177X_8X, OPT_MCU_LPC40XX)
+  // LPC 17xx and 40xx endpoint type (bulk/interrupt/iso) are fixed by its number
+  // 0 control, 1 In, 2 Bulk, 3 Iso, 4 In etc ...
+  #define EPNUM_AUDIO   0x03
+
+#elif TU_CHECK_MCU(OPT_MCU_NRF5X)
+  // nRF5x ISO can only be endpoint 8
+  #define EPNUM_AUDIO   0x08
+
+#else
+  #define EPNUM_AUDIO   0x01
+#endif
+
+uint8_t const desc_configuration[] =
+{
+  // Config number, interface count, string index, total length, attribute, power in mA
+  TUD_CONFIG_DESCRIPTOR(1, ITF_NUM_TOTAL, 0, CONFIG_TOTAL_LEN, 0x00, 100),
+
+  // Interface number, string index, EP Out & EP In address, EP size
+  TUD_AUDIO_MIC_FOUR_CH_DESCRIPTOR(/*_itfnum*/ ITF_NUM_AUDIO_CONTROL, /*_stridx*/ 0, /*_nBytesPerSample*/ CFG_TUD_AUDIO_FUNC_1_N_BYTES_PER_SAMPLE_TX, /*_nBitsUsedPerSample*/ CFG_TUD_AUDIO_FUNC_1_N_BYTES_PER_SAMPLE_TX*8, /*_epin*/ 0x80 | EPNUM_AUDIO, /*_epsize*/ CFG_TUD_AUDIO_EP_SZ_IN)
+};
+
+// Invoked when received GET CONFIGURATION DESCRIPTOR
+// Application return pointer to descriptor
+// Descriptor contents must exist long enough for transfer to complete
+uint8_t const * tud_descriptor_configuration_cb(uint8_t index)
+{
+  (void) index; // for multiple configurations
+  return desc_configuration;
+}
+
+//--------------------------------------------------------------------+
+// String Descriptors
+//--------------------------------------------------------------------+
+
+// String Descriptor Index
+enum {
+  STRID_LANGID = 0,
+  STRID_MANUFACTURER,
+  STRID_PRODUCT,
+  STRID_SERIAL,
+};
+
+// array of pointer to string descriptors
+char const* string_desc_arr [] = {
+    (const char[]) { 0x09, 0x04 }, // 0: is supported language is English (0x0409)
+    "PaniRCorp",                   // 1: Manufacturer
+    "MicNode_4_Ch",                // 2: Product
+    NULL,                          // 3: Serials will use unique ID if possible
+    "UAC2",                        // 4: Audio Interface
+};
+
+static uint16_t _desc_str[32 + 1];
+
+// Invoked when received GET STRING DESCRIPTOR request
+// Application return pointer to descriptor, whose contents must exist long enough for transfer to complete
+uint16_t const *tud_descriptor_string_cb(uint8_t index, uint16_t langid) {
+  (void) langid;
+  size_t chr_count;
+
+  switch ( index ) {
+    case STRID_LANGID:
+      memcpy(&_desc_str[1], string_desc_arr[0], 2);
+      chr_count = 1;
+      break;
+
+    case STRID_SERIAL:
+      chr_count = board_usb_get_serial(_desc_str + 1, 32);
+      break;
+
+    default:
+      // Note: the 0xEE index string is a Microsoft OS 1.0 Descriptors.
+      // https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-defined-usb-descriptors
+
+      if ( !(index < sizeof(string_desc_arr) / sizeof(string_desc_arr[0])) ) return NULL;
+
+      const char *str = string_desc_arr[index];
+
+      // Cap at max char
+      chr_count = strlen(str);
+      size_t const max_count = sizeof(_desc_str) / sizeof(_desc_str[0]) - 1; // -1 for string type
+      if ( chr_count > max_count ) chr_count = max_count;
+
+      // Convert ASCII string into UTF-16
+      for ( size_t i = 0; i < chr_count; i++ ) {
+        _desc_str[1 + i] = str[i];
+      }
+      break;
+  }
+
+  // first byte is length (including header), second byte is string type
+  _desc_str[0] = (uint16_t) ((TUSB_DESC_STRING << 8) | (2 * chr_count + 2));
+
+  return _desc_str;
+}
diff --git a/examples/device/audio_test/src/main.c b/examples/device/audio_test/src/main.c
index 06783ccfb..f79bb4468 100644
--- a/examples/device/audio_test/src/main.c
+++ b/examples/device/audio_test/src/main.c
@@ -42,10 +42,6 @@
 // MACRO CONSTANT TYPEDEF PROTYPES
 //--------------------------------------------------------------------+
 
-#ifndef AUDIO_SAMPLE_RATE
-#define AUDIO_SAMPLE_RATE   48000
-#endif
-
 /* Blink pattern
  * - 250 ms  : device not mounted
  * - 1000 ms : device mounted
@@ -90,12 +86,12 @@ int main(void)
   }
 
   // Init values
-  sampFreq = AUDIO_SAMPLE_RATE;
+  sampFreq = CFG_TUD_AUDIO_FUNC_1_SAMPLE_RATE;
   clkValid = 1;
 
   sampleFreqRng.wNumSubRanges = 1;
-  sampleFreqRng.subrange[0].bMin = AUDIO_SAMPLE_RATE;
-  sampleFreqRng.subrange[0].bMax = AUDIO_SAMPLE_RATE;
+  sampleFreqRng.subrange[0].bMin = CFG_TUD_AUDIO_FUNC_1_SAMPLE_RATE;
+  sampleFreqRng.subrange[0].bMax = CFG_TUD_AUDIO_FUNC_1_SAMPLE_RATE;
   sampleFreqRng.subrange[0].bRes = 0;
 
   while (1)
diff --git a/examples/device/audio_test/src/tusb_config.h b/examples/device/audio_test/src/tusb_config.h
index 9f38612a9..8c021e23c 100644
--- a/examples/device/audio_test/src/tusb_config.h
+++ b/examples/device/audio_test/src/tusb_config.h
@@ -106,6 +106,7 @@ extern "C" {
 //--------------------------------------------------------------------
 
 // Have a look into audio_device.h for all configurations
+#define CFG_TUD_AUDIO_FUNC_1_SAMPLE_RATE                              48000
 
 #define CFG_TUD_AUDIO_FUNC_1_DESC_LEN                                 TUD_AUDIO_MIC_ONE_CH_DESC_LEN
 #define CFG_TUD_AUDIO_FUNC_1_N_AS_INT                                 1                                       // Number of Standard AS Interface Descriptors (4.9.1) defined per audio function - this is required to be able to remember the current alternate settings of these interfaces - We restrict us here to have a constant number for all audio functions (which means this has to be the maximum number of AS interfaces an audio function has and a second audio function with less AS interfaces just wastes a few bytes)
@@ -114,9 +115,9 @@ extern "C" {
 #define CFG_TUD_AUDIO_ENABLE_EP_IN                                    1
 #define CFG_TUD_AUDIO_FUNC_1_N_BYTES_PER_SAMPLE_TX                    2                                       // Driver gets this info from the descriptors - we define it here to use it to setup the descriptors and to do calculations with it below
 #define CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX                            1                                       // Driver gets this info from the descriptors - we define it here to use it to setup the descriptors and to do calculations with it below - be aware: for different number of channels you need another descriptor!
-#define CFG_TUD_AUDIO_EP_SZ_IN                                        (48 + 1) * CFG_TUD_AUDIO_FUNC_1_N_BYTES_PER_SAMPLE_TX * CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX      // 48 Samples (48 kHz) x 2 Bytes/Sample x CFG_TUD_AUDIO_N_CHANNELS_TX Channels - One extra sample is needed for asynchronous transfer adjustment, see feedback EP
-#define CFG_TUD_AUDIO_FUNC_1_EP_IN_SZ_MAX                             CFG_TUD_AUDIO_EP_SZ_IN                  // Maximum EP IN size for all AS alternate settings used
-#define CFG_TUD_AUDIO_FUNC_1_EP_IN_SW_BUF_SZ                          CFG_TUD_AUDIO_EP_SZ_IN + 1
+#define CFG_TUD_AUDIO_EP_SZ_IN                                        TUD_AUDIO_EP_SIZE(CFG_TUD_AUDIO_FUNC_1_SAMPLE_RATE, CFG_TUD_AUDIO_FUNC_1_N_BYTES_PER_SAMPLE_TX, CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX)
+#define CFG_TUD_AUDIO_FUNC_1_EP_IN_SZ_MAX                             CFG_TUD_AUDIO_EP_SZ_IN
+#define CFG_TUD_AUDIO_FUNC_1_EP_IN_SW_BUF_SZ                          (TUD_OPT_HIGH_SPEED ? 8 : 1) * CFG_TUD_AUDIO_EP_SZ_IN // Example write FIFO every 1ms, so it should be 8 times larger for HS device
 
 #ifdef __cplusplus
 }
diff --git a/examples/device/audio_test_freertos/CMakeLists.txt b/examples/device/audio_test_freertos/CMakeLists.txt
new file mode 100644
index 000000000..eb22014fb
--- /dev/null
+++ b/examples/device/audio_test_freertos/CMakeLists.txt
@@ -0,0 +1,34 @@
+cmake_minimum_required(VERSION 3.17)
+
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/family_support.cmake)
+
+# gets PROJECT name for the example (e.g. <BOARD>-<DIR_NAME>)
+family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
+
+project(${PROJECT} C CXX ASM)
+
+# Checks this example is valid for the family and initializes the project
+family_initialize_project(${PROJECT} ${CMAKE_CURRENT_LIST_DIR})
+
+# Espressif has its own cmake build system
+if(FAMILY STREQUAL "espressif")
+  return()
+endif()
+
+add_executable(${PROJECT})
+
+# Example source
+target_sources(${PROJECT} PUBLIC
+  ${CMAKE_CURRENT_SOURCE_DIR}/src/freertos_hook.c
+  ${CMAKE_CURRENT_SOURCE_DIR}/src/main.c
+  ${CMAKE_CURRENT_SOURCE_DIR}/src/usb_descriptors.c
+  )
+
+# Example include
+target_include_directories(${PROJECT} PUBLIC
+  ${CMAKE_CURRENT_SOURCE_DIR}/src
+  )
+
+# Configure compilation flags and libraries for the example with FreeRTOS.
+# See the corresponding function in hw/bsp/FAMILY/family.cmake for details.
+family_configure_device_example(${PROJECT} freertos)
diff --git a/examples/device/audio_test_freertos/Makefile b/examples/device/audio_test_freertos/Makefile
new file mode 100644
index 000000000..df2cdef4e
--- /dev/null
+++ b/examples/device/audio_test_freertos/Makefile
@@ -0,0 +1,38 @@
+include ../../build_system/make/make.mk
+
+FREERTOS_SRC = lib/FreeRTOS-Kernel
+FREERTOS_PORTABLE_PATH = $(FREERTOS_SRC)/portable/$(if $(findstring iar,$(TOOLCHAIN)),IAR,GCC)
+
+INC += \
+	src \
+	src/FreeRTOSConfig \
+	$(TOP)/hw \
+	$(TOP)/$(FREERTOS_SRC)/include \
+	$(TOP)/$(FREERTOS_PORTABLE_SRC) \
+
+# Example source
+EXAMPLE_SOURCE = \
+	src/freertos_hook.c \
+	src/main.c \
+	src/usb_descriptors.c
+
+SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
+
+# FreeRTOS source, all files in port folder
+SRC_C += \
+	$(FREERTOS_SRC)/list.c \
+	$(FREERTOS_SRC)/queue.c \
+	$(FREERTOS_SRC)/tasks.c \
+	$(FREERTOS_SRC)/timers.c \
+	$(subst $(TOP)/,,$(wildcard $(TOP)/$(FREERTOS_PORTABLE_SRC)/*.c))
+
+SRC_S += \
+	$(subst $(TOP)/,,$(wildcard $(TOP)/$(FREERTOS_PORTABLE_SRC)/*.s))
+
+# Suppress FreeRTOS warnings
+CFLAGS += -Wno-error=cast-qual -Wno-error=redundant-decls
+
+# FreeRTOS (lto + Os) linker issue
+LDFLAGS += -Wl,--undefined=vTaskSwitchContext
+
+include ../../build_system/make/rules.mk
diff --git a/examples/device/audio_test_freertos/README.md b/examples/device/audio_test_freertos/README.md
new file mode 100644
index 000000000..9477fcd78
--- /dev/null
+++ b/examples/device/audio_test_freertos/README.md
@@ -0,0 +1,19 @@
+# How to build example for Esp32s3
+1. Load idf environment variables (eg. using the esp-idf alias `get_idf` if configured)
+
+2. cd into examples directory
+```
+$ cd /tinyusb/examples/device/audio_test_freertos
+```
+
+3. Run cmake in project directory specifying the board
+```
+$ cmake -DBOARD=espressif_s3_devkitc -B build -G Ninja .
+$ ninja.exe -C build
+```
+
+4. Flash the binary onto the esp32-s3 by copy-paste of the full command output by the esp-idf build system replacing **(PORT)** with eg. /dev/ttyUSB0
+
+eg.
+
+> /home/kaspernyhus/.espressif/python_env/idf4.4_py3.8_env/bin/python ../../../../esp-idf/components/esptool_py/esptool/esptool.py -p /dev/ttyUSB0 -b 460800 --before default_reset --after hard_reset --chip esp32s3  write_flash --flash_mode dio --flash_size detect --flash_freq 80m 0x0 _build/espressif_s3_devkitc/bootloader/bootloader.bin 0x8000 _build/espressif_s3_devkitc/partition_table/partition-table.bin 0x10000 _build/espressif_s3_devkitc/audio_test_freertos.bin
diff --git a/examples/device/audio_test_freertos/sdkconfig.defaults b/examples/device/audio_test_freertos/sdkconfig.defaults
new file mode 100644
index 000000000..83871619e
--- /dev/null
+++ b/examples/device/audio_test_freertos/sdkconfig.defaults
@@ -0,0 +1,3 @@
+CONFIG_IDF_CMAKE=y
+CONFIG_FREERTOS_WATCHPOINT_END_OF_STACK=y
+CONFIG_FREERTOS_SUPPORT_STATIC_ALLOCATION=y
diff --git a/examples/device/audio_test_freertos/skip.txt b/examples/device/audio_test_freertos/skip.txt
new file mode 100644
index 000000000..c13667f56
--- /dev/null
+++ b/examples/device/audio_test_freertos/skip.txt
@@ -0,0 +1,15 @@
+mcu:CH32V103
+mcu:CH32V20X
+mcu:CH32V307
+mcu:CXD56
+mcu:F1C100S
+mcu:GD32VF103
+mcu:MKL25ZXX
+mcu:MSP430x5xx
+mcu:RP2040
+mcu:SAMD11
+mcu:SAMX7X
+mcu:VALENTYUSB_EPTRI
+mcu:RAXXX
+family:broadcom_32bit
+family:broadcom_64bit
diff --git a/examples/device/audio_test_freertos/src/CMakeLists.txt b/examples/device/audio_test_freertos/src/CMakeLists.txt
new file mode 100644
index 000000000..cef2b46ee
--- /dev/null
+++ b/examples/device/audio_test_freertos/src/CMakeLists.txt
@@ -0,0 +1,4 @@
+# This file is for ESP-IDF only
+idf_component_register(SRCS "main.c" "usb_descriptors.c"
+                    INCLUDE_DIRS "."
+                    REQUIRES boards tinyusb_src)
diff --git a/examples/device/audio_test_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h b/examples/device/audio_test_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h
new file mode 100644
index 000000000..869500ad2
--- /dev/null
+++ b/examples/device/audio_test_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h
@@ -0,0 +1,191 @@
+/*
+ * FreeRTOS Kernel V10.0.0
+ * Copyright (C) 2017 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software. If you wish to use our Amazon
+ * FreeRTOS name, please do so in a fair use way that does not cause confusion.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * http://www.FreeRTOS.org
+ * http://aws.amazon.com/freertos
+ *
+ * 1 tab == 4 spaces!
+ */
+
+
+#ifndef FREERTOS_CONFIG_H
+#define FREERTOS_CONFIG_H
+
+/*-----------------------------------------------------------
+ * Application specific definitions.
+ *
+ * These definitions should be adjusted for your particular hardware and
+ * application requirements.
+ *
+ * THESE PARAMETERS ARE DESCRIBED WITHIN THE 'CONFIGURATION' SECTION OF THE
+ * FreeRTOS API DOCUMENTATION AVAILABLE ON THE FreeRTOS.org WEB SITE.
+ *
+ * See http://www.freertos.org/a00110.html.
+ *----------------------------------------------------------*/
+
+// skip if included from IAR assembler
+#ifndef __IASMARM__
+
+// Include MCU header
+#include "bsp/board_mcu.h"
+
+#if CFG_TUSB_MCU == OPT_MCU_ESP32S2 || CFG_TUSB_MCU == OPT_MCU_ESP32S3
+  #error "ESP32-Sx should use IDF's FreeRTOSConfig.h"
+#endif
+
+// TODO fix later
+#if CFG_TUSB_MCU == OPT_MCU_MM32F327X
+  extern u32 SystemCoreClock;
+#else
+  // FIXME cause redundant-decls warnings
+  extern uint32_t SystemCoreClock;
+#endif
+
+#endif
+
+/* Cortex M23/M33 port configuration. */
+#define configENABLE_MPU								        0
+#define configENABLE_FPU								        1
+#define configENABLE_TRUSTZONE					        0
+#define configMINIMAL_SECURE_STACK_SIZE					( 1024 )
+#define configRUN_FREERTOS_SECURE_ONLY          1
+
+#define configUSE_PREEMPTION                    1
+#define configUSE_PORT_OPTIMISED_TASK_SELECTION 0
+#define configCPU_CLOCK_HZ                      SystemCoreClock
+#define configTICK_RATE_HZ                      ( 1000 )
+#define configMAX_PRIORITIES                    ( 5 )
+#define configMINIMAL_STACK_SIZE                ( 128 )
+#define configTOTAL_HEAP_SIZE                   ( configSUPPORT_DYNAMIC_ALLOCATION*4*1024 )
+#define configMAX_TASK_NAME_LEN                 16
+#define configUSE_16_BIT_TICKS                  0
+#define configIDLE_SHOULD_YIELD                 1
+#define configUSE_MUTEXES                       1
+#define configUSE_RECURSIVE_MUTEXES             1
+#define configUSE_COUNTING_SEMAPHORES           1
+#define configQUEUE_REGISTRY_SIZE               4
+#define configUSE_QUEUE_SETS                    0
+#define configUSE_TIME_SLICING                  0
+#define configUSE_NEWLIB_REENTRANT              0
+#define configENABLE_BACKWARD_COMPATIBILITY     1
+#define configSTACK_ALLOCATION_FROM_SEPARATE_HEAP   0
+
+#define configSUPPORT_STATIC_ALLOCATION         1
+#define configSUPPORT_DYNAMIC_ALLOCATION        0
+
+/* Hook function related definitions. */
+#define configUSE_IDLE_HOOK                    0
+#define configUSE_TICK_HOOK                    0
+#define configUSE_MALLOC_FAILED_HOOK           0 // cause nested extern warning
+#define configCHECK_FOR_STACK_OVERFLOW         2
+#define configCHECK_HANDLER_INSTALLATION       0
+
+/* Run time and task stats gathering related definitions. */
+#define configGENERATE_RUN_TIME_STATS          0
+#define configUSE_TRACE_FACILITY               1 // legacy trace
+#define configUSE_STATS_FORMATTING_FUNCTIONS   0
+
+/* Co-routine definitions. */
+#define configUSE_CO_ROUTINES                  0
+#define configMAX_CO_ROUTINE_PRIORITIES        2
+
+/* Software timer related definitions. */
+#define configUSE_TIMERS                       1
+#define configTIMER_TASK_PRIORITY              (configMAX_PRIORITIES-2)
+#define configTIMER_QUEUE_LENGTH               32
+#define configTIMER_TASK_STACK_DEPTH           configMINIMAL_STACK_SIZE
+
+/* Optional functions - most linkers will remove unused functions anyway. */
+#define INCLUDE_vTaskPrioritySet               0
+#define INCLUDE_uxTaskPriorityGet              0
+#define INCLUDE_vTaskDelete                    0
+#define INCLUDE_vTaskSuspend                   1 // required for queue, semaphore, mutex to be blocked indefinitely with portMAX_DELAY
+#define INCLUDE_xResumeFromISR                 0
+#define INCLUDE_vTaskDelayUntil                1
+#define INCLUDE_vTaskDelay                     1
+#define INCLUDE_xTaskGetSchedulerState         0
+#define INCLUDE_xTaskGetCurrentTaskHandle      0
+#define INCLUDE_uxTaskGetStackHighWaterMark    0
+#define INCLUDE_xTaskGetIdleTaskHandle         0
+#define INCLUDE_xTimerGetTimerDaemonTaskHandle 0
+#define INCLUDE_pcTaskGetTaskName              0
+#define INCLUDE_eTaskGetState                  0
+#define INCLUDE_xEventGroupSetBitFromISR       0
+#define INCLUDE_xTimerPendFunctionCall         0
+
+#ifdef __RX__
+/* Renesas RX series */
+#define vSoftwareInterruptISR					        INT_Excep_ICU_SWINT
+#define vTickISR								              INT_Excep_CMT0_CMI0
+#define configPERIPHERAL_CLOCK_HZ				      (configCPU_CLOCK_HZ/2)
+#define configKERNEL_INTERRUPT_PRIORITY			  1
+#define configMAX_SYSCALL_INTERRUPT_PRIORITY	4
+
+#else
+
+/* FreeRTOS hooks to NVIC vectors */
+#define xPortPendSVHandler    PendSV_Handler
+#define xPortSysTickHandler   SysTick_Handler
+#define vPortSVCHandler       SVC_Handler
+
+//--------------------------------------------------------------------+
+// Interrupt nesting behavior configuration.
+//--------------------------------------------------------------------+
+#if defined(__NVIC_PRIO_BITS)
+  // For Cortex-M specific: __NVIC_PRIO_BITS is defined in core_cmx.h
+	#define configPRIO_BITS       __NVIC_PRIO_BITS
+
+#elif defined(__ECLIC_INTCTLBITS)
+  // RISC-V Bumblebee core from nuclei
+  #define configPRIO_BITS       __ECLIC_INTCTLBITS
+
+#elif defined(__IASMARM__)
+  // FIXME: IAR Assembler cannot include mcu header directly to get __NVIC_PRIO_BITS.
+  // Therefore we will hard coded it to minimum value of 2 to get pass ci build.
+  // IAR user must update this to correct value of the target MCU
+  #message "configPRIO_BITS is hard coded to 2 to pass IAR build only. User should update it per MCU"
+  #define configPRIO_BITS       2
+
+#else
+  #error "FreeRTOS configPRIO_BITS to be defined"
+#endif
+
+/* The lowest interrupt priority that can be used in a call to a "set priority" function. */
+#define configLIBRARY_LOWEST_INTERRUPT_PRIORITY			  ((1<<configPRIO_BITS) - 1)
+
+/* The highest interrupt priority that can be used by any interrupt service
+routine that makes calls to interrupt safe FreeRTOS API functions.  DO NOT CALL
+INTERRUPT SAFE FREERTOS API FUNCTIONS FROM ANY INTERRUPT THAT HAS A HIGHER
+PRIORITY THAN THIS! (higher priorities are lower numeric values. */
+#define configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY	2
+
+/* Interrupt priorities used by the kernel port layer itself.  These are generic
+to all Cortex-M ports, and do not rely on any particular library functions. */
+#define configKERNEL_INTERRUPT_PRIORITY 		          ( configLIBRARY_LOWEST_INTERRUPT_PRIORITY << (8 - configPRIO_BITS) )
+
+/* !!!! configMAX_SYSCALL_INTERRUPT_PRIORITY must not be set to zero !!!!
+See http://www.FreeRTOS.org/RTOS-Cortex-M3-M4.html. */
+#define configMAX_SYSCALL_INTERRUPT_PRIORITY 	        ( configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY << (8 - configPRIO_BITS) )
+
+#endif
+
+#endif /* __FREERTOS_CONFIG__H */
diff --git a/examples/device/audio_test_freertos/src/freertos_hook.c b/examples/device/audio_test_freertos/src/freertos_hook.c
new file mode 100644
index 000000000..4920e3fae
--- /dev/null
+++ b/examples/device/audio_test_freertos/src/freertos_hook.c
@@ -0,0 +1,115 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Ha Thach (tinyusb.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+
+//--------------------------------------------------------------------+
+// INCLUDE
+//--------------------------------------------------------------------+
+#include "FreeRTOS.h"
+#include "task.h"
+#include "common/tusb_common.h"
+
+
+void vApplicationMallocFailedHook(void)
+{
+  taskDISABLE_INTERRUPTS();
+  TU_ASSERT(false, );
+}
+
+void vApplicationStackOverflowHook(xTaskHandle pxTask, char *pcTaskName)
+{
+  (void) pxTask;
+  (void) pcTaskName;
+
+  taskDISABLE_INTERRUPTS();
+  TU_ASSERT(false, );
+}
+
+/* configSUPPORT_STATIC_ALLOCATION is set to 1, so the application must provide an
+ * implementation of vApplicationGetIdleTaskMemory() to provide the memory that is
+ * used by the Idle task. */
+void vApplicationGetIdleTaskMemory( StaticTask_t **ppxIdleTaskTCBBuffer, StackType_t **ppxIdleTaskStackBuffer, uint32_t *pulIdleTaskStackSize )
+{
+  /* If the buffers to be provided to the Idle task are declared inside this
+   * function then they must be declared static - otherwise they will be allocated on
+   * the stack and so not exists after this function exits. */
+  static StaticTask_t xIdleTaskTCB;
+  static StackType_t uxIdleTaskStack[ configMINIMAL_STACK_SIZE ];
+
+  /* Pass out a pointer to the StaticTask_t structure in which the Idle task's
+    state will be stored. */
+  *ppxIdleTaskTCBBuffer = &xIdleTaskTCB;
+
+  /* Pass out the array that will be used as the Idle task's stack. */
+  *ppxIdleTaskStackBuffer = uxIdleTaskStack;
+
+  /* Pass out the size of the array pointed to by *ppxIdleTaskStackBuffer.
+    Note that, as the array is necessarily of type StackType_t,
+    configMINIMAL_STACK_SIZE is specified in words, not bytes. */
+  *pulIdleTaskStackSize = configMINIMAL_STACK_SIZE;
+}
+
+/* configSUPPORT_STATIC_ALLOCATION and configUSE_TIMERS are both set to 1, so the
+ * application must provide an implementation of vApplicationGetTimerTaskMemory()
+ * to provide the memory that is used by the Timer service task. */
+void vApplicationGetTimerTaskMemory( StaticTask_t **ppxTimerTaskTCBBuffer, StackType_t **ppxTimerTaskStackBuffer, uint32_t *pulTimerTaskStackSize )
+{
+  /* If the buffers to be provided to the Timer task are declared inside this
+   * function then they must be declared static - otherwise they will be allocated on
+   * the stack and so not exists after this function exits. */
+  static StaticTask_t xTimerTaskTCB;
+  static StackType_t uxTimerTaskStack[ configTIMER_TASK_STACK_DEPTH ];
+
+  /* Pass out a pointer to the StaticTask_t structure in which the Timer
+    task's state will be stored. */
+  *ppxTimerTaskTCBBuffer = &xTimerTaskTCB;
+
+  /* Pass out the array that will be used as the Timer task's stack. */
+  *ppxTimerTaskStackBuffer = uxTimerTaskStack;
+
+  /* Pass out the size of the array pointed to by *ppxTimerTaskStackBuffer.
+    Note that, as the array is necessarily of type StackType_t,
+    configTIMER_TASK_STACK_DEPTH is specified in words, not bytes. */
+  *pulTimerTaskStackSize = configTIMER_TASK_STACK_DEPTH;
+}
+
+#if CFG_TUSB_MCU == OPT_MCU_RX63X | CFG_TUSB_MCU == OPT_MCU_RX65X
+#include "iodefine.h"
+void vApplicationSetupTimerInterrupt(void)
+{
+  /* Enable CMT0 */
+  unsigned short oldPRCR = SYSTEM.PRCR.WORD;
+  SYSTEM.PRCR.WORD = (0xA5u<<8) | TU_BIT(1);
+  MSTP(CMT0)       = 0;
+  SYSTEM.PRCR.WORD = (0xA5u<<8) | oldPRCR;
+
+  CMT0.CMCNT      = 0;
+  CMT0.CMCOR      = (unsigned short)(((configPERIPHERAL_CLOCK_HZ/configTICK_RATE_HZ)-1)/128);
+  CMT0.CMCR.WORD  = TU_BIT(6) | 2;
+  IR(CMT0, CMI0)  = 0;
+  IPR(CMT0, CMI0) = configKERNEL_INTERRUPT_PRIORITY;
+  IEN(CMT0, CMI0) = 1;
+  CMT.CMSTR0.BIT.STR0 = 1;
+}
+#endif
diff --git a/examples/device/audio_test_freertos/src/main.c b/examples/device/audio_test_freertos/src/main.c
new file mode 100644
index 000000000..a3751da40
--- /dev/null
+++ b/examples/device/audio_test_freertos/src/main.c
@@ -0,0 +1,508 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Reinhard Panhuber
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+
+/* plot_audio_samples.py requires following modules:
+ * $ sudo apt install libportaudio
+ * $ pip3 install sounddevice matplotlib
+ *
+ * Then run
+ * $ python3 plot_audio_samples.py
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "bsp/board_api.h"
+#include "tusb.h"
+
+#if TUP_MCU_ESPRESSIF
+  // ESP-IDF need "freertos/" prefix in include path.
+  // CFG_TUSB_OS_INC_PATH should be defined accordingly.
+  #include "freertos/FreeRTOS.h"
+  #include "freertos/semphr.h"
+  #include "freertos/queue.h"
+  #include "freertos/task.h"
+  #include "freertos/timers.h"
+
+  #define USBD_STACK_SIZE     4096
+#else
+
+  #include "FreeRTOS.h"
+  #include "semphr.h"
+  #include "queue.h"
+  #include "task.h"
+  #include "timers.h"
+
+  // Increase stack size when debug log is enabled
+  #define USBD_STACK_SIZE    (4*configMINIMAL_STACK_SIZE/2) * (CFG_TUSB_DEBUG ? 2 : 1)
+#endif
+
+#define BLINKY_STACK_SIZE   configMINIMAL_STACK_SIZE
+
+//--------------------------------------------------------------------+
+// MACRO CONSTANT TYPEDEF PROTYPES
+//--------------------------------------------------------------------+
+
+/* Blink pattern
+ * - 250 ms  : device not mounted
+ * - 1000 ms : device mounted
+ * - 2500 ms : device is suspended
+ */
+enum  {
+  BLINK_NOT_MOUNTED = 250,
+  BLINK_MOUNTED = 1000,
+  BLINK_SUSPENDED = 2500,
+};
+
+// static task
+#if configSUPPORT_STATIC_ALLOCATION
+StackType_t blinky_stack[BLINKY_STACK_SIZE];
+StaticTask_t blinky_taskdef;
+
+StackType_t  usb_device_stack[USBD_STACK_SIZE];
+StaticTask_t usb_device_taskdef;
+#endif
+
+static uint32_t blink_interval_ms = BLINK_NOT_MOUNTED;
+
+// Audio controls
+// Current states
+bool mute[CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX + 1]; 				          // +1 for master channel 0
+uint16_t volume[CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX + 1]; 					// +1 for master channel 0
+uint32_t sampFreq;
+uint8_t clkValid;
+
+// Range states
+audio_control_range_2_n_t(1) volumeRng[CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX+1]; 			// Volume range state
+audio_control_range_4_n_t(1) sampleFreqRng; 						// Sample frequency range state
+
+// Audio test data
+uint16_t test_buffer_audio[(CFG_TUD_AUDIO_EP_SZ_IN - 2) / 2];
+uint16_t startVal = 0;
+
+void led_blinking_task(void* param);
+void usb_device_task(void* param);
+void audio_task(void);
+
+/*------------- MAIN -------------*/
+int main(void)
+{
+  board_init();
+
+  // Init values
+  sampFreq = CFG_TUD_AUDIO_FUNC_1_SAMPLE_RATE;
+  clkValid = 1;
+
+  sampleFreqRng.wNumSubRanges = 1;
+  sampleFreqRng.subrange[0].bMin = CFG_TUD_AUDIO_FUNC_1_SAMPLE_RATE;
+  sampleFreqRng.subrange[0].bMax = CFG_TUD_AUDIO_FUNC_1_SAMPLE_RATE;
+  sampleFreqRng.subrange[0].bRes = 0;
+
+#if configSUPPORT_STATIC_ALLOCATION
+  // blinky task
+  xTaskCreateStatic(led_blinking_task, "blinky", BLINKY_STACK_SIZE, NULL, 1, blinky_stack, &blinky_taskdef);
+
+  // Create a task for tinyusb device stack
+  xTaskCreateStatic(usb_device_task, "usbd", USBD_STACK_SIZE, NULL, configMAX_PRIORITIES-1, usb_device_stack, &usb_device_taskdef);
+#else
+  xTaskCreate(led_blinking_task, "blinky", BLINKY_STACK_SIZE, NULL, 1, NULL);
+  xTaskCreate(usb_device_task, "usbd", USBD_STACK_SIZE, NULL, configMAX_PRIORITIES - 1, NULL);
+#endif
+
+  // skip starting scheduler (and return) for ESP32-S2 or ESP32-S3
+  #if !TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
+    vTaskStartScheduler();
+  #endif
+
+  return 0;
+}
+
+#if TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
+void app_main(void)
+{
+  main();
+}
+#endif
+
+// USB Device Driver task
+// This top level thread process all usb events and invoke callbacks
+void usb_device_task(void* param)
+{
+  (void) param;
+
+  // init device stack on configured roothub port
+  // This should be called after scheduler/kernel is started.
+  // Otherwise it could cause kernel issue since USB IRQ handler does use RTOS queue API.
+  tud_init(BOARD_TUD_RHPORT);
+
+  if (board_init_after_tusb) {
+    board_init_after_tusb();
+  }
+
+  // RTOS forever loop
+  while (1)
+  {
+    // tinyusb device task
+    tud_task();
+  }
+}
+
+//--------------------------------------------------------------------+
+// Device callbacks
+//--------------------------------------------------------------------+
+
+// Invoked when device is mounted
+void tud_mount_cb(void) {
+  blink_interval_ms = BLINK_MOUNTED;
+}
+
+// Invoked when device is unmounted
+void tud_umount_cb(void) {
+  blink_interval_ms = BLINK_NOT_MOUNTED;
+}
+
+// Invoked when usb bus is suspended
+// remote_wakeup_en : if host allow us  to perform remote wakeup
+// Within 7ms, device must draw an average of current less than 2.5 mA from bus
+void tud_suspend_cb(bool remote_wakeup_en) {
+  (void) remote_wakeup_en;
+  blink_interval_ms = BLINK_SUSPENDED;
+}
+
+// Invoked when usb bus is resumed
+void tud_resume_cb(void) {
+  blink_interval_ms = tud_mounted() ? BLINK_MOUNTED : BLINK_NOT_MOUNTED;
+}
+
+//--------------------------------------------------------------------+
+// AUDIO Task
+//--------------------------------------------------------------------+
+
+void audio_task(void)
+{
+  // Yet to be filled - e.g. put meas data into TX FIFOs etc.
+  // asm("nop");
+}
+
+//--------------------------------------------------------------------+
+// Application Callback API Implementations
+//--------------------------------------------------------------------+
+
+// Invoked when audio class specific set request received for an EP
+bool tud_audio_set_req_ep_cb(uint8_t rhport, tusb_control_request_t const * p_request, uint8_t *pBuff)
+{
+  (void) rhport;
+  (void) pBuff;
+
+  // We do not support any set range requests here, only current value requests
+  TU_VERIFY(p_request->bRequest == AUDIO_CS_REQ_CUR);
+
+  // Page 91 in UAC2 specification
+  uint8_t channelNum = TU_U16_LOW(p_request->wValue);
+  uint8_t ctrlSel = TU_U16_HIGH(p_request->wValue);
+  uint8_t ep = TU_U16_LOW(p_request->wIndex);
+
+  (void) channelNum; (void) ctrlSel; (void) ep;
+
+  return false; 	// Yet not implemented
+}
+
+// Invoked when audio class specific set request received for an interface
+bool tud_audio_set_req_itf_cb(uint8_t rhport, tusb_control_request_t const * p_request, uint8_t *pBuff)
+{
+  (void) rhport;
+  (void) pBuff;
+
+  // We do not support any set range requests here, only current value requests
+  TU_VERIFY(p_request->bRequest == AUDIO_CS_REQ_CUR);
+
+  // Page 91 in UAC2 specification
+  uint8_t channelNum = TU_U16_LOW(p_request->wValue);
+  uint8_t ctrlSel = TU_U16_HIGH(p_request->wValue);
+  uint8_t itf = TU_U16_LOW(p_request->wIndex);
+
+  (void) channelNum; (void) ctrlSel; (void) itf;
+
+  return false; 	// Yet not implemented
+}
+
+// Invoked when audio class specific set request received for an entity
+bool tud_audio_set_req_entity_cb(uint8_t rhport, tusb_control_request_t const * p_request, uint8_t *pBuff)
+{
+  (void) rhport;
+
+  // Page 91 in UAC2 specification
+  uint8_t channelNum = TU_U16_LOW(p_request->wValue);
+  uint8_t ctrlSel = TU_U16_HIGH(p_request->wValue);
+  uint8_t itf = TU_U16_LOW(p_request->wIndex);
+  uint8_t entityID = TU_U16_HIGH(p_request->wIndex);
+
+  (void) itf;
+
+  // We do not support any set range requests here, only current value requests
+  TU_VERIFY(p_request->bRequest == AUDIO_CS_REQ_CUR);
+
+  // If request is for our feature unit
+  if ( entityID == 2 )
+  {
+    switch ( ctrlSel )
+    {
+      case AUDIO_FU_CTRL_MUTE:
+        // Request uses format layout 1
+        TU_VERIFY(p_request->wLength == sizeof(audio_control_cur_1_t));
+
+        mute[channelNum] = ((audio_control_cur_1_t*) pBuff)->bCur;
+
+        TU_LOG2("    Set Mute: %d of channel: %u\r\n", mute[channelNum], channelNum);
+      return true;
+
+      case AUDIO_FU_CTRL_VOLUME:
+        // Request uses format layout 2
+        TU_VERIFY(p_request->wLength == sizeof(audio_control_cur_2_t));
+
+        volume[channelNum] = (uint16_t) ((audio_control_cur_2_t*) pBuff)->bCur;
+
+        TU_LOG2("    Set Volume: %d dB of channel: %u\r\n", volume[channelNum], channelNum);
+      return true;
+
+        // Unknown/Unsupported control
+      default:
+        TU_BREAKPOINT();
+      return false;
+    }
+  }
+  return false;    // Yet not implemented
+}
+
+// Invoked when audio class specific get request received for an EP
+bool tud_audio_get_req_ep_cb(uint8_t rhport, tusb_control_request_t const * p_request)
+{
+  (void) rhport;
+
+  // Page 91 in UAC2 specification
+  uint8_t channelNum = TU_U16_LOW(p_request->wValue);
+  uint8_t ctrlSel = TU_U16_HIGH(p_request->wValue);
+  uint8_t ep = TU_U16_LOW(p_request->wIndex);
+
+  (void) channelNum; (void) ctrlSel; (void) ep;
+
+  return false; 	// Yet not implemented
+}
+
+// Invoked when audio class specific get request received for an interface
+bool tud_audio_get_req_itf_cb(uint8_t rhport, tusb_control_request_t const * p_request)
+{
+  (void) rhport;
+
+  // Page 91 in UAC2 specification
+  uint8_t channelNum = TU_U16_LOW(p_request->wValue);
+  uint8_t ctrlSel = TU_U16_HIGH(p_request->wValue);
+  uint8_t itf = TU_U16_LOW(p_request->wIndex);
+
+  (void) channelNum; (void) ctrlSel; (void) itf;
+
+  return false; 	// Yet not implemented
+}
+
+// Invoked when audio class specific get request received for an entity
+bool tud_audio_get_req_entity_cb(uint8_t rhport, tusb_control_request_t const * p_request)
+{
+  (void) rhport;
+
+  // Page 91 in UAC2 specification
+  uint8_t channelNum = TU_U16_LOW(p_request->wValue);
+  uint8_t ctrlSel = TU_U16_HIGH(p_request->wValue);
+  // uint8_t itf = TU_U16_LOW(p_request->wIndex); 			// Since we have only one audio function implemented, we do not need the itf value
+  uint8_t entityID = TU_U16_HIGH(p_request->wIndex);
+
+  // Input terminal (Microphone input)
+  if (entityID == 1)
+  {
+    switch ( ctrlSel )
+    {
+      case AUDIO_TE_CTRL_CONNECTOR:
+      {
+        // The terminal connector control only has a get request with only the CUR attribute.
+        audio_desc_channel_cluster_t ret;
+
+        // Those are dummy values for now
+        ret.bNrChannels = 1;
+        ret.bmChannelConfig = (audio_channel_config_t) 0;
+        ret.iChannelNames = 0;
+
+        TU_LOG2("    Get terminal connector\r\n");
+
+        return tud_audio_buffer_and_schedule_control_xfer(rhport, p_request, (void*) &ret, sizeof(ret));
+      }
+      break;
+
+        // Unknown/Unsupported control selector
+      default:
+        TU_BREAKPOINT();
+        return false;
+    }
+  }
+
+  // Feature unit
+  if (entityID == 2)
+  {
+    switch ( ctrlSel )
+    {
+      case AUDIO_FU_CTRL_MUTE:
+        // Audio control mute cur parameter block consists of only one byte - we thus can send it right away
+        // There does not exist a range parameter block for mute
+        TU_LOG2("    Get Mute of channel: %u\r\n", channelNum);
+        return tud_control_xfer(rhport, p_request, &mute[channelNum], 1);
+
+      case AUDIO_FU_CTRL_VOLUME:
+        switch ( p_request->bRequest )
+        {
+          case AUDIO_CS_REQ_CUR:
+            TU_LOG2("    Get Volume of channel: %u\r\n", channelNum);
+            return tud_control_xfer(rhport, p_request, &volume[channelNum], sizeof(volume[channelNum]));
+
+          case AUDIO_CS_REQ_RANGE:
+            TU_LOG2("    Get Volume range of channel: %u\r\n", channelNum);
+
+            // Copy values - only for testing - better is version below
+            audio_control_range_2_n_t(1)
+            ret;
+
+            ret.wNumSubRanges = 1;
+            ret.subrange[0].bMin = -90;    // -90 dB
+            ret.subrange[0].bMax = 90;		// +90 dB
+            ret.subrange[0].bRes = 1; 		// 1 dB steps
+
+            return tud_audio_buffer_and_schedule_control_xfer(rhport, p_request, (void*) &ret, sizeof(ret));
+
+            // Unknown/Unsupported control
+          default:
+            TU_BREAKPOINT();
+            return false;
+        }
+      break;
+
+        // Unknown/Unsupported control
+      default:
+        TU_BREAKPOINT();
+        return false;
+    }
+  }
+
+  // Clock Source unit
+  if ( entityID == 4 )
+  {
+    switch ( ctrlSel )
+    {
+      case AUDIO_CS_CTRL_SAM_FREQ:
+        // channelNum is always zero in this case
+        switch ( p_request->bRequest )
+        {
+          case AUDIO_CS_REQ_CUR:
+            TU_LOG2("    Get Sample Freq.\r\n");
+            return tud_control_xfer(rhport, p_request, &sampFreq, sizeof(sampFreq));
+
+          case AUDIO_CS_REQ_RANGE:
+            TU_LOG2("    Get Sample Freq. range\r\n");
+            return tud_control_xfer(rhport, p_request, &sampleFreqRng, sizeof(sampleFreqRng));
+
+           // Unknown/Unsupported control
+          default:
+            TU_BREAKPOINT();
+            return false;
+        }
+      break;
+
+      case AUDIO_CS_CTRL_CLK_VALID:
+        // Only cur attribute exists for this request
+        TU_LOG2("    Get Sample Freq. valid\r\n");
+        return tud_control_xfer(rhport, p_request, &clkValid, sizeof(clkValid));
+
+      // Unknown/Unsupported control
+      default:
+        TU_BREAKPOINT();
+        return false;
+    }
+  }
+
+  TU_LOG2("  Unsupported entity: %d\r\n", entityID);
+  return false; 	// Yet not implemented
+}
+
+bool tud_audio_tx_done_pre_load_cb(uint8_t rhport, uint8_t itf, uint8_t ep_in, uint8_t cur_alt_setting)
+{
+  (void) rhport;
+  (void) itf;
+  (void) ep_in;
+  (void) cur_alt_setting;
+
+  tud_audio_write ((uint8_t *)test_buffer_audio, CFG_TUD_AUDIO_EP_SZ_IN - 2);
+
+  return true;
+}
+
+bool tud_audio_tx_done_post_load_cb(uint8_t rhport, uint16_t n_bytes_copied, uint8_t itf, uint8_t ep_in, uint8_t cur_alt_setting)
+{
+  (void) rhport;
+  (void) n_bytes_copied;
+  (void) itf;
+  (void) ep_in;
+  (void) cur_alt_setting;
+
+  for (size_t cnt = 0; cnt < (CFG_TUD_AUDIO_EP_SZ_IN - 2) / 2; cnt++)
+  {
+    test_buffer_audio[cnt] = startVal++;
+  }
+
+  return true;
+}
+
+bool tud_audio_set_itf_close_EP_cb(uint8_t rhport, tusb_control_request_t const * p_request)
+{
+  (void) rhport;
+  (void) p_request;
+  startVal = 0;
+
+  return true;
+}
+
+//--------------------------------------------------------------------+
+// BLINKING TASK
+//--------------------------------------------------------------------+
+void led_blinking_task(void* param) {
+  (void) param;
+  static uint32_t start_ms = 0;
+  static bool led_state = false;
+
+  while (1) {
+    // Blink every interval ms
+    vTaskDelay(blink_interval_ms / portTICK_PERIOD_MS);
+    start_ms += blink_interval_ms;
+
+    board_led_write(led_state);
+    led_state = 1 - led_state; // toggle
+  }
+}
diff --git a/examples/device/audio_test_freertos/src/plot_audio_samples.py b/examples/device/audio_test_freertos/src/plot_audio_samples.py
new file mode 100644
index 000000000..304b2d5de
--- /dev/null
+++ b/examples/device/audio_test_freertos/src/plot_audio_samples.py
@@ -0,0 +1,33 @@
+import sounddevice as sd
+import matplotlib.pyplot as plt
+import numpy as np
+import platform
+
+if __name__ == '__main__':
+
+    # If you got "ValueError: No input device matching", that is because your PC name example device
+    # differently from tested list below. Uncomment the next line to see full list and try to pick correct one
+    # print(sd.query_devices())
+
+    fs = 48000           # Sample rate
+    duration = 1000e-3    # Duration of recording
+
+    if platform.system() == 'Windows':
+        # MME is needed since there are more than one MicNode device APIs (at least in Windows)
+        device = 'Microphone (MicNode) MME'
+    elif platform.system() == 'Darwin':
+        device = 'MicNode'
+    else:
+        device ='default'
+
+    myrecording = sd.rec(int(duration * fs), samplerate=fs, channels=1, dtype='int16', device=device)
+    print('Waiting...')
+    sd.wait()  # Wait until recording is finished
+    print('Done!')
+
+    time = np.arange(0, duration, 1 / fs)  # time vector
+    plt.plot(time, myrecording)
+    plt.xlabel('Time [s]')
+    plt.ylabel('Amplitude')
+    plt.title('MicNode')
+    plt.show()
diff --git a/examples/device/audio_test_freertos/src/tusb_config.h b/examples/device/audio_test_freertos/src/tusb_config.h
new file mode 100644
index 000000000..8b376a4c3
--- /dev/null
+++ b/examples/device/audio_test_freertos/src/tusb_config.h
@@ -0,0 +1,132 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Ha Thach (tinyusb.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+
+#ifndef _TUSB_CONFIG_H_
+#define _TUSB_CONFIG_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+//--------------------------------------------------------------------+
+// Board Specific Configuration
+//--------------------------------------------------------------------+
+
+// RHPort number used for device can be defined by board.mk, default to port 0
+#ifndef BOARD_TUD_RHPORT
+#define BOARD_TUD_RHPORT      0
+#endif
+
+// RHPort max operational speed can defined by board.mk
+#ifndef BOARD_TUD_MAX_SPEED
+#define BOARD_TUD_MAX_SPEED   OPT_MODE_DEFAULT_SPEED
+#endif
+
+//--------------------------------------------------------------------
+// COMMON CONFIGURATION
+//--------------------------------------------------------------------
+
+// defined by compiler flags for flexibility
+#ifndef CFG_TUSB_MCU
+#error CFG_TUSB_MCU must be defined
+#endif
+
+// This examples use FreeRTOS
+#ifndef CFG_TUSB_OS
+#define CFG_TUSB_OS                 OPT_OS_FREERTOS
+#endif
+
+// Espressif IDF requires "freertos/" prefix in include path
+#if TUP_MCU_ESPRESSIF
+#define CFG_TUSB_OS_INC_PATH  freertos/
+#endif
+
+#ifndef CFG_TUSB_DEBUG
+#define CFG_TUSB_DEBUG              0
+#endif
+
+// Enable Device stack
+#define CFG_TUD_ENABLED       1
+
+// Default is max speed that hardware controller could support with on-chip PHY
+#define CFG_TUD_MAX_SPEED     BOARD_TUD_MAX_SPEED
+
+// CFG_TUSB_DEBUG is defined by compiler in DEBUG build
+// #define CFG_TUSB_DEBUG           0
+
+/* USB DMA on some MCUs can only access a specific SRAM region with restriction on alignment.
+ * Tinyusb use follows macros to declare transferring memory so that they can be put
+ * into those specific section.
+ * e.g
+ * - CFG_TUSB_MEM SECTION : __attribute__ (( section(".usb_ram") ))
+ * - CFG_TUSB_MEM_ALIGN   : __attribute__ ((aligned(4)))
+ */
+#ifndef CFG_TUSB_MEM_SECTION
+#define CFG_TUSB_MEM_SECTION
+#endif
+
+#ifndef CFG_TUSB_MEM_ALIGN
+#define CFG_TUSB_MEM_ALIGN          __attribute__ ((aligned(4)))
+#endif
+
+//--------------------------------------------------------------------
+// DEVICE CONFIGURATION
+//--------------------------------------------------------------------
+
+#ifndef CFG_TUD_ENDPOINT0_SIZE
+#define CFG_TUD_ENDPOINT0_SIZE    64
+#endif
+
+//------------- CLASS -------------//
+#define CFG_TUD_AUDIO             1
+#define CFG_TUD_CDC               0
+#define CFG_TUD_MSC               0
+#define CFG_TUD_HID               0
+#define CFG_TUD_MIDI              0
+#define CFG_TUD_VENDOR            0
+
+//--------------------------------------------------------------------
+// AUDIO CLASS DRIVER CONFIGURATION
+//--------------------------------------------------------------------
+
+// Have a look into audio_device.h for all configurations
+#define CFG_TUD_AUDIO_FUNC_1_SAMPLE_RATE                              48000
+
+#define CFG_TUD_AUDIO_FUNC_1_DESC_LEN                                 TUD_AUDIO_MIC_ONE_CH_DESC_LEN
+#define CFG_TUD_AUDIO_FUNC_1_N_AS_INT                                 1                                       // Number of Standard AS Interface Descriptors (4.9.1) defined per audio function - this is required to be able to remember the current alternate settings of these interfaces - We restrict us here to have a constant number for all audio functions (which means this has to be the maximum number of AS interfaces an audio function has and a second audio function with less AS interfaces just wastes a few bytes)
+#define CFG_TUD_AUDIO_FUNC_1_CTRL_BUF_SZ                              64                                      // Size of control request buffer
+
+#define CFG_TUD_AUDIO_ENABLE_EP_IN                                    1
+#define CFG_TUD_AUDIO_FUNC_1_N_BYTES_PER_SAMPLE_TX                    2                                       // Driver gets this info from the descriptors - we define it here to use it to setup the descriptors and to do calculations with it below
+#define CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX                            1                                       // Driver gets this info from the descriptors - we define it here to use it to setup the descriptors and to do calculations with it below - be aware: for different number of channels you need another descriptor!
+#define CFG_TUD_AUDIO_EP_SZ_IN                                        TUD_AUDIO_EP_SIZE(CFG_TUD_AUDIO_FUNC_1_SAMPLE_RATE, CFG_TUD_AUDIO_FUNC_1_N_BYTES_PER_SAMPLE_TX, CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX)
+#define CFG_TUD_AUDIO_FUNC_1_EP_IN_SZ_MAX                             CFG_TUD_AUDIO_EP_SZ_IN
+#define CFG_TUD_AUDIO_FUNC_1_EP_IN_SW_BUF_SZ                          (TUD_OPT_HIGH_SPEED ? 8 : 1) * CFG_TUD_AUDIO_EP_SZ_IN // Example write FIFO every 1ms, so it should be 8 times larger for HS device
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _TUSB_CONFIG_H_ */
diff --git a/examples/device/audio_test_freertos/src/usb_descriptors.c b/examples/device/audio_test_freertos/src/usb_descriptors.c
new file mode 100644
index 000000000..9864377f6
--- /dev/null
+++ b/examples/device/audio_test_freertos/src/usb_descriptors.c
@@ -0,0 +1,181 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Ha Thach (tinyusb.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+
+#include "bsp/board_api.h"
+#include "tusb.h"
+
+/* A combination of interfaces must have a unique product id, since PC will save device driver after the first plug.
+ * Same VID/PID with different interface e.g MSC (first), then CDC (later) will possibly cause system error on PC.
+ *
+ * Auto ProductID layout's Bitmap:
+ *   [MSB]     AUDIO | MIDI | HID | MSC | CDC          [LSB]
+ */
+#define _PID_MAP(itf, n)  ( (CFG_TUD_##itf) << (n) )
+#define USB_PID           (0x4000 | _PID_MAP(CDC, 0) | _PID_MAP(MSC, 1) | _PID_MAP(HID, 2) | \
+    _PID_MAP(MIDI, 3) | _PID_MAP(AUDIO, 4) | _PID_MAP(VENDOR, 5) )
+
+//--------------------------------------------------------------------+
+// Device Descriptors
+//--------------------------------------------------------------------+
+tusb_desc_device_t const desc_device =
+{
+    .bLength            = sizeof(tusb_desc_device_t),
+    .bDescriptorType    = TUSB_DESC_DEVICE,
+    .bcdUSB             = 0x0200,
+
+    // Use Interface Association Descriptor (IAD) for Audio
+    // As required by USB Specs IAD's subclass must be common class (2) and protocol must be IAD (1)
+    .bDeviceClass       = TUSB_CLASS_MISC,
+    .bDeviceSubClass    = MISC_SUBCLASS_COMMON,
+    .bDeviceProtocol    = MISC_PROTOCOL_IAD,
+    .bMaxPacketSize0    = CFG_TUD_ENDPOINT0_SIZE,
+
+    .idVendor           = 0xCafe,
+    .idProduct          = USB_PID,
+    .bcdDevice          = 0x0100,
+
+    .iManufacturer      = 0x01,
+    .iProduct           = 0x02,
+    .iSerialNumber      = 0x03,
+
+    .bNumConfigurations = 0x01
+};
+
+// Invoked when received GET DEVICE DESCRIPTOR
+// Application return pointer to descriptor
+uint8_t const * tud_descriptor_device_cb(void)
+{
+  return (uint8_t const *) &desc_device;
+}
+
+//--------------------------------------------------------------------+
+// Configuration Descriptor
+//--------------------------------------------------------------------+
+enum
+{
+  ITF_NUM_AUDIO_CONTROL = 0,
+  ITF_NUM_AUDIO_STREAMING,
+  ITF_NUM_TOTAL
+};
+
+#define CONFIG_TOTAL_LEN    	(TUD_CONFIG_DESC_LEN + CFG_TUD_AUDIO * TUD_AUDIO_MIC_ONE_CH_DESC_LEN)
+
+#if CFG_TUSB_MCU == OPT_MCU_LPC175X_6X || CFG_TUSB_MCU == OPT_MCU_LPC177X_8X || CFG_TUSB_MCU == OPT_MCU_LPC40XX
+  // LPC 17xx and 40xx endpoint type (bulk/interrupt/iso) are fixed by its number
+  // 0 control, 1 In, 2 Bulk, 3 Iso, 4 In etc ...
+  #define EPNUM_AUDIO   0x03
+
+#elif TU_CHECK_MCU(OPT_MCU_NRF5X)
+  // nRF5x ISO can only be endpoint 8
+  #define EPNUM_AUDIO   0x08
+
+#else
+  #define EPNUM_AUDIO   0x01
+#endif
+
+uint8_t const desc_configuration[] =
+{
+    // Config number, interface count, string index, total length, attribute, power in mA
+    TUD_CONFIG_DESCRIPTOR(1, ITF_NUM_TOTAL, 0, CONFIG_TOTAL_LEN, 0x00, 100),
+
+    // Interface number, string index, EP Out & EP In address, EP size
+    TUD_AUDIO_MIC_ONE_CH_DESCRIPTOR(/*_itfnum*/ ITF_NUM_AUDIO_CONTROL, /*_stridx*/ 0, /*_nBytesPerSample*/ CFG_TUD_AUDIO_FUNC_1_N_BYTES_PER_SAMPLE_TX, /*_nBitsUsedPerSample*/ CFG_TUD_AUDIO_FUNC_1_N_BYTES_PER_SAMPLE_TX*8, /*_epin*/ 0x80 | EPNUM_AUDIO, /*_epsize*/ CFG_TUD_AUDIO_EP_SZ_IN)
+};
+
+// Invoked when received GET CONFIGURATION DESCRIPTOR
+// Application return pointer to descriptor
+// Descriptor contents must exist long enough for transfer to complete
+uint8_t const * tud_descriptor_configuration_cb(uint8_t index)
+{
+  (void) index; // for multiple configurations
+  return desc_configuration;
+}
+
+//--------------------------------------------------------------------+
+// String Descriptors
+//--------------------------------------------------------------------+
+
+// String Descriptor Index
+enum {
+  STRID_LANGID = 0,
+  STRID_MANUFACTURER,
+  STRID_PRODUCT,
+  STRID_SERIAL,
+};
+
+// array of pointer to string descriptors
+char const* string_desc_arr [] =
+{
+    (const char[]) { 0x09, 0x04 }, // 0: is supported language is English (0x0409)
+    "PaniRCorp",                   // 1: Manufacturer
+    "MicNode",                     // 2: Product
+    NULL,                          // 3: Serials will use unique ID if possible
+    "UAC2",                        // 4: Audio Interface
+
+};
+
+static uint16_t _desc_str[32 + 1];
+
+// Invoked when received GET STRING DESCRIPTOR request
+// Application return pointer to descriptor, whose contents must exist long enough for transfer to complete
+uint16_t const *tud_descriptor_string_cb(uint8_t index, uint16_t langid) {
+  (void) langid;
+  size_t chr_count;
+
+  switch ( index ) {
+    case STRID_LANGID:
+      memcpy(&_desc_str[1], string_desc_arr[0], 2);
+      chr_count = 1;
+      break;
+
+    case STRID_SERIAL:
+      chr_count = board_usb_get_serial(_desc_str + 1, 32);
+      break;
+
+    default:
+      // Note: the 0xEE index string is a Microsoft OS 1.0 Descriptors.
+      // https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-defined-usb-descriptors
+
+      if ( !(index < sizeof(string_desc_arr) / sizeof(string_desc_arr[0])) ) return NULL;
+
+      const char *str = string_desc_arr[index];
+
+      // Cap at max char
+      chr_count = strlen(str);
+      size_t const max_count = sizeof(_desc_str) / sizeof(_desc_str[0]) - 1; // -1 for string type
+      if ( chr_count > max_count ) chr_count = max_count;
+
+      // Convert ASCII string into UTF-16
+      for ( size_t i = 0; i < chr_count; i++ ) {
+        _desc_str[1 + i] = str[i];
+      }
+      break;
+  }
+
+  // first byte is length (including header), second byte is string type
+  _desc_str[0] = (uint16_t) ((TUSB_DESC_STRING << 8) | (2 * chr_count + 2));
+
+  return _desc_str;
+}
diff --git a/examples/device/audio_test_multi_rate/src/main.c b/examples/device/audio_test_multi_rate/src/main.c
index 3e7f40dac..2ff7f10bd 100644
--- a/examples/device/audio_test_multi_rate/src/main.c
+++ b/examples/device/audio_test_multi_rate/src/main.c
@@ -272,7 +272,7 @@ bool tud_audio_set_req_entity_cb(uint8_t rhport, tusb_control_request_t const *
 
         sampFreq = (uint32_t)((audio_control_cur_4_t *)pBuff)->bCur;
 
-        TU_LOG2("Clock set current freq: %lu\r\n", sampFreq);
+        TU_LOG2("Clock set current freq: %" PRIu32 "\r\n", sampFreq);
 
         return true;
       break;
diff --git a/examples/device/board_test/src/tusb_config.h b/examples/device/board_test/src/tusb_config.h
index 1a27cc87f..36eafe807 100644
--- a/examples/device/board_test/src/tusb_config.h
+++ b/examples/device/board_test/src/tusb_config.h
@@ -49,7 +49,7 @@
 #endif
 
 // Espressif IDF requires "freertos/" prefix in include path
-#if TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
+#if TUP_MCU_ESPRESSIF
 #define CFG_TUSB_OS_INC_PATH  freertos/
 #endif
 
diff --git a/examples/device/cdc_dual_ports/src/main.c b/examples/device/cdc_dual_ports/src/main.c
index 1167a5d50..ef12186f2 100644
--- a/examples/device/cdc_dual_ports/src/main.c
+++ b/examples/device/cdc_dual_ports/src/main.c
@@ -119,6 +119,26 @@ static void cdc_task(void) {
   }
 }
 
+// Invoked when cdc when line state changed e.g connected/disconnected
+// Use to reset to DFU when disconnect with 1200 bps
+void tud_cdc_line_state_cb(uint8_t instance, bool dtr, bool rts) {
+  (void)rts;
+
+  // DTR = false is counted as disconnected
+  if (!dtr) {
+    // touch1200 only with first CDC instance (Serial)
+    if (instance == 0) {
+      cdc_line_coding_t coding;
+      tud_cdc_get_line_coding(&coding);
+      if (coding.bit_rate == 1200) {
+        if (board_reset_to_bootloader) {
+          board_reset_to_bootloader();
+        }
+      }
+    }
+  }
+}
+
 //--------------------------------------------------------------------+
 // BLINKING TASK
 //--------------------------------------------------------------------+
diff --git a/examples/device/cdc_msc/skip.txt b/examples/device/cdc_msc/skip.txt
index 833fd072c..b6252e405 100644
--- a/examples/device/cdc_msc/skip.txt
+++ b/examples/device/cdc_msc/skip.txt
@@ -1,2 +1,3 @@
 mcu:SAMD11
 family:espressif
+board:ch32v203g_r0_1v0
diff --git a/examples/device/cdc_msc/src/main.c b/examples/device/cdc_msc/src/main.c
index 0d3f97c8f..4581a3bab 100644
--- a/examples/device/cdc_msc/src/main.c
+++ b/examples/device/cdc_msc/src/main.c
@@ -23,10 +23,6 @@
  *
  */
 
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-
 #include "bsp/board_api.h"
 #include "tusb.h"
 
diff --git a/examples/device/cdc_msc_freertos/Makefile b/examples/device/cdc_msc_freertos/Makefile
index 13f336f99..fe3fb6482 100644
--- a/examples/device/cdc_msc_freertos/Makefile
+++ b/examples/device/cdc_msc_freertos/Makefile
@@ -1,7 +1,7 @@
 include ../../build_system/make/make.mk
 
 FREERTOS_SRC = lib/FreeRTOS-Kernel
-FREERTOS_PORTABLE_PATH= $(FREERTOS_SRC)/portable/$(if $(USE_IAR),IAR,GCC)
+FREERTOS_PORTABLE_PATH = $(FREERTOS_SRC)/portable/$(if $(findstring iar,$(TOOLCHAIN)),IAR,GCC)
 
 INC += \
 	src \
diff --git a/examples/device/cdc_msc_freertos/skip.txt b/examples/device/cdc_msc_freertos/skip.txt
index a6f96b288..75a79aff4 100644
--- a/examples/device/cdc_msc_freertos/skip.txt
+++ b/examples/device/cdc_msc_freertos/skip.txt
@@ -1,3 +1,5 @@
+mcu:CH32V103
+mcu:CH32V20X
 mcu:CH32V307
 mcu:CXD56
 mcu:F1C100S
@@ -9,5 +11,6 @@ mcu:SAMD11
 mcu:SAMX7X
 mcu:VALENTYUSB_EPTRI
 mcu:RAXXX
+mcu:STM32L0
 family:broadcom_32bit
 family:broadcom_64bit
diff --git a/examples/device/cdc_msc_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h b/examples/device/cdc_msc_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h
index 6cc7a6577..869500ad2 100644
--- a/examples/device/cdc_msc_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h
+++ b/examples/device/cdc_msc_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h
@@ -67,6 +67,7 @@
 #define configENABLE_FPU								        1
 #define configENABLE_TRUSTZONE					        0
 #define configMINIMAL_SECURE_STACK_SIZE					( 1024 )
+#define configRUN_FREERTOS_SECURE_ONLY          1
 
 #define configUSE_PREEMPTION                    1
 #define configUSE_PORT_OPTIMISED_TASK_SELECTION 0
diff --git a/examples/device/cdc_msc_freertos/src/freertos_hook.c b/examples/device/cdc_msc_freertos/src/freertos_hook.c
index ab885947c..4920e3fae 100644
--- a/examples/device/cdc_msc_freertos/src/freertos_hook.c
+++ b/examples/device/cdc_msc_freertos/src/freertos_hook.c
@@ -99,9 +99,10 @@ void vApplicationGetTimerTaskMemory( StaticTask_t **ppxTimerTaskTCBBuffer, Stack
 void vApplicationSetupTimerInterrupt(void)
 {
   /* Enable CMT0 */
+  unsigned short oldPRCR = SYSTEM.PRCR.WORD;
   SYSTEM.PRCR.WORD = (0xA5u<<8) | TU_BIT(1);
   MSTP(CMT0)       = 0;
-  SYSTEM.PRCR.WORD = (0xA5u<<8);
+  SYSTEM.PRCR.WORD = (0xA5u<<8) | oldPRCR;
 
   CMT0.CMCNT      = 0;
   CMT0.CMCOR      = (unsigned short)(((configPERIPHERAL_CLOCK_HZ/configTICK_RATE_HZ)-1)/128);
diff --git a/examples/device/cdc_msc_freertos/src/main.c b/examples/device/cdc_msc_freertos/src/main.c
index e94e8eaec..607d40270 100644
--- a/examples/device/cdc_msc_freertos/src/main.c
+++ b/examples/device/cdc_msc_freertos/src/main.c
@@ -30,7 +30,7 @@
 #include "bsp/board_api.h"
 #include "tusb.h"
 
-#if TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
+#if TUP_MCU_ESPRESSIF
   // ESP-IDF need "freertos/" prefix in include path.
   // CFG_TUSB_OS_INC_PATH should be defined accordingly.
   #include "freertos/FreeRTOS.h"
@@ -111,14 +111,14 @@ int main(void) {
 #endif
 
   // skip starting scheduler (and return) for ESP32-S2 or ESP32-S3
-#if !TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
+#if !TUP_MCU_ESPRESSIF
   vTaskStartScheduler();
 #endif
 
   return 0;
 }
 
-#if TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
+#if TUP_MCU_ESPRESSIF
 void app_main(void) {
   main();
 }
diff --git a/examples/device/cdc_msc_freertos/src/msc_disk.c b/examples/device/cdc_msc_freertos/src/msc_disk.c
index c8a04bb74..d2f8628f1 100644
--- a/examples/device/cdc_msc_freertos/src/msc_disk.c
+++ b/examples/device/cdc_msc_freertos/src/msc_disk.c
@@ -28,6 +28,9 @@
 
 #if CFG_TUD_MSC
 
+// whether host does safe-eject
+static bool ejected = false;
+
 // Some MCU doesn't have enough 8KB SRAM to store the whole disk
 // We will use Flash as read-only disk with board that has
 // CFG_EXAMPLE_MSC_READONLY defined
@@ -137,7 +140,14 @@ bool tud_msc_test_unit_ready_cb(uint8_t lun)
 {
   (void) lun;
 
-  return true; // RAM disk is always ready
+  // RAM disk is ready until ejected
+  if (ejected) {
+    // Additional Sense 3A-00 is NOT_FOUND
+    tud_msc_set_sense(lun, SCSI_SENSE_NOT_READY, 0x3a, 0x00);
+    return false;
+  }
+
+  return true;
 }
 
 // Invoked when received SCSI_CMD_READ_CAPACITY_10 and SCSI_CMD_READ_FORMAT_CAPACITY to determine the disk size
@@ -166,6 +176,7 @@ bool tud_msc_start_stop_cb(uint8_t lun, uint8_t power_condition, bool start, boo
     }else
     {
       // unload disk storage
+      ejected = true;
     }
   }
 
@@ -187,6 +198,17 @@ int32_t tud_msc_read10_cb(uint8_t lun, uint32_t lba, uint32_t offset, void* buff
   return (int32_t) bufsize;
 }
 
+bool tud_msc_is_writable_cb (uint8_t lun)
+{
+  (void) lun;
+
+#ifdef CFG_EXAMPLE_MSC_READONLY
+  return false;
+#else
+  return true;
+#endif
+}
+
 // Callback invoked when received WRITE10 command.
 // Process data in buffer to disk's storage and return number of written bytes
 int32_t tud_msc_write10_cb(uint8_t lun, uint32_t lba, uint32_t offset, uint8_t* buffer, uint32_t bufsize)
diff --git a/examples/device/cdc_msc_freertos/src/tusb_config.h b/examples/device/cdc_msc_freertos/src/tusb_config.h
index 91efe7d40..e743c9148 100644
--- a/examples/device/cdc_msc_freertos/src/tusb_config.h
+++ b/examples/device/cdc_msc_freertos/src/tusb_config.h
@@ -59,7 +59,7 @@
 #endif
 
 // Espressif IDF requires "freertos/" prefix in include path
-#if TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
+#if TUP_MCU_ESPRESSIF
 #define CFG_TUSB_OS_INC_PATH  freertos/
 #endif
 
diff --git a/examples/device/cdc_uac2/src/uac2_app.c b/examples/device/cdc_uac2/src/uac2_app.c
index 98659ea68..c57d98a1a 100644
--- a/examples/device/cdc_uac2/src/uac2_app.c
+++ b/examples/device/cdc_uac2/src/uac2_app.c
@@ -69,7 +69,7 @@ static bool tud_audio_clock_get_request(uint8_t rhport, audio_control_request_t
   {
     if (request->bRequest == AUDIO_CS_REQ_CUR)
     {
-      TU_LOG1("Clock get current freq %lu\r\n", current_sample_rate);
+      TU_LOG1("Clock get current freq %" PRIu32 "\r\n", current_sample_rate);
 
       audio_control_cur_4_t curf = { (int32_t) tu_htole32(current_sample_rate) };
       return tud_audio_buffer_and_schedule_control_xfer(rhport, (tusb_control_request_t const *)request, &curf, sizeof(curf));
@@ -118,7 +118,7 @@ static bool tud_audio_clock_set_request(uint8_t rhport, audio_control_request_t
 
     current_sample_rate = (uint32_t) ((audio_control_cur_4_t const *)buf)->bCur;
 
-    TU_LOG1("Clock set current freq: %ld\r\n", current_sample_rate);
+    TU_LOG1("Clock set current freq: %" PRIu32 "\r\n", current_sample_rate);
 
     return true;
   }
diff --git a/examples/device/dynamic_configuration/skip.txt b/examples/device/dynamic_configuration/skip.txt
index 833fd072c..b6252e405 100644
--- a/examples/device/dynamic_configuration/skip.txt
+++ b/examples/device/dynamic_configuration/skip.txt
@@ -1,2 +1,3 @@
 mcu:SAMD11
 family:espressif
+board:ch32v203g_r0_1v0
diff --git a/examples/device/hid_composite_freertos/Makefile b/examples/device/hid_composite_freertos/Makefile
index add9e9814..88d602393 100644
--- a/examples/device/hid_composite_freertos/Makefile
+++ b/examples/device/hid_composite_freertos/Makefile
@@ -3,7 +3,7 @@ DEPS_SUBMODULES += lib/FreeRTOS-Kernel
 include ../../build_system/make/make.mk
 
 FREERTOS_SRC = lib/FreeRTOS-Kernel
-FREERTOS_PORTABLE_PATH= $(FREERTOS_SRC)/portable/$(if $(USE_IAR),IAR,GCC)
+FREERTOS_PORTABLE_PATH= $(FREERTOS_SRC)/portable/$(if $(findstring iar,$(TOOLCHAIN)),IAR,GCC)
 
 INC += \
 	src \
diff --git a/examples/device/hid_composite_freertos/skip.txt b/examples/device/hid_composite_freertos/skip.txt
index a6f96b288..c13667f56 100644
--- a/examples/device/hid_composite_freertos/skip.txt
+++ b/examples/device/hid_composite_freertos/skip.txt
@@ -1,3 +1,5 @@
+mcu:CH32V103
+mcu:CH32V20X
 mcu:CH32V307
 mcu:CXD56
 mcu:F1C100S
diff --git a/examples/device/hid_composite_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h b/examples/device/hid_composite_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h
index 6cc7a6577..869500ad2 100644
--- a/examples/device/hid_composite_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h
+++ b/examples/device/hid_composite_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h
@@ -67,6 +67,7 @@
 #define configENABLE_FPU								        1
 #define configENABLE_TRUSTZONE					        0
 #define configMINIMAL_SECURE_STACK_SIZE					( 1024 )
+#define configRUN_FREERTOS_SECURE_ONLY          1
 
 #define configUSE_PREEMPTION                    1
 #define configUSE_PORT_OPTIMISED_TASK_SELECTION 0
diff --git a/examples/device/hid_composite_freertos/src/freertos_hook.c b/examples/device/hid_composite_freertos/src/freertos_hook.c
index ab885947c..4920e3fae 100644
--- a/examples/device/hid_composite_freertos/src/freertos_hook.c
+++ b/examples/device/hid_composite_freertos/src/freertos_hook.c
@@ -99,9 +99,10 @@ void vApplicationGetTimerTaskMemory( StaticTask_t **ppxTimerTaskTCBBuffer, Stack
 void vApplicationSetupTimerInterrupt(void)
 {
   /* Enable CMT0 */
+  unsigned short oldPRCR = SYSTEM.PRCR.WORD;
   SYSTEM.PRCR.WORD = (0xA5u<<8) | TU_BIT(1);
   MSTP(CMT0)       = 0;
-  SYSTEM.PRCR.WORD = (0xA5u<<8);
+  SYSTEM.PRCR.WORD = (0xA5u<<8) | oldPRCR;
 
   CMT0.CMCNT      = 0;
   CMT0.CMCOR      = (unsigned short)(((configPERIPHERAL_CLOCK_HZ/configTICK_RATE_HZ)-1)/128);
diff --git a/examples/device/hid_composite_freertos/src/main.c b/examples/device/hid_composite_freertos/src/main.c
index ff2cb635e..2bd545bc2 100644
--- a/examples/device/hid_composite_freertos/src/main.c
+++ b/examples/device/hid_composite_freertos/src/main.c
@@ -31,7 +31,7 @@
 #include "tusb.h"
 #include "usb_descriptors.h"
 
-#if TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
+#if TUP_MCU_ESPRESSIF
   // ESP-IDF need "freertos/" prefix in include path.
   // CFG_TUSB_OS_INC_PATH should be defined accordingly.
   #include "freertos/FreeRTOS.h"
@@ -113,14 +113,14 @@ int main(void)
   xTimerStart(blinky_tm, 0);
 
   // skip starting scheduler (and return) for ESP32-S2 or ESP32-S3
-#if !TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
+#if !TUP_MCU_ESPRESSIF
   vTaskStartScheduler();
 #endif
 
   return 0;
 }
 
-#if TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
+#if TUP_MCU_ESPRESSIF
 void app_main(void)
 {
   main();
diff --git a/examples/device/hid_composite_freertos/src/tusb_config.h b/examples/device/hid_composite_freertos/src/tusb_config.h
index 3ba9bf311..0689e0f23 100644
--- a/examples/device/hid_composite_freertos/src/tusb_config.h
+++ b/examples/device/hid_composite_freertos/src/tusb_config.h
@@ -59,7 +59,7 @@
 #endif
 
 // Espressif IDF requires "freertos/" prefix in include path
-#if TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
+#if TUP_MCU_ESPRESSIF
 #define CFG_TUSB_OS_INC_PATH  freertos/
 #endif
 
diff --git a/examples/device/msc_dual_lun/src/main.c b/examples/device/msc_dual_lun/src/main.c
index de402d3da..aabd0bf8a 100644
--- a/examples/device/msc_dual_lun/src/main.c
+++ b/examples/device/msc_dual_lun/src/main.c
@@ -39,7 +39,7 @@
  * - 1000 ms : device mounted
  * - 2500 ms : device is suspended
  */
-enum  {
+enum {
   BLINK_NOT_MOUNTED = 250,
   BLINK_MOUNTED = 1000,
   BLINK_SUSPENDED = 2500,
@@ -50,8 +50,7 @@ static uint32_t blink_interval_ms = BLINK_NOT_MOUNTED;
 void led_blinking_task(void);
 
 /*------------- MAIN -------------*/
-int main(void)
-{
+int main(void) {
   board_init();
 
   // init device stack on configured roothub port
@@ -61,8 +60,7 @@ int main(void)
     board_init_after_tusb();
   }
 
-  while (1)
-  {
+  while (1) {
     tud_task(); // tinyusb device task
     led_blinking_task();
   }
@@ -73,42 +71,37 @@ int main(void)
 //--------------------------------------------------------------------+
 
 // Invoked when device is mounted
-void tud_mount_cb(void)
-{
+void tud_mount_cb(void) {
   blink_interval_ms = BLINK_MOUNTED;
 }
 
 // Invoked when device is unmounted
-void tud_umount_cb(void)
-{
+void tud_umount_cb(void) {
   blink_interval_ms = BLINK_NOT_MOUNTED;
 }
 
 // Invoked when usb bus is suspended
 // remote_wakeup_en : if host allow us  to perform remote wakeup
 // Within 7ms, device must draw an average of current less than 2.5 mA from bus
-void tud_suspend_cb(bool remote_wakeup_en)
-{
+void tud_suspend_cb(bool remote_wakeup_en) {
   (void) remote_wakeup_en;
   blink_interval_ms = BLINK_SUSPENDED;
 }
 
 // Invoked when usb bus is resumed
-void tud_resume_cb(void)
-{
+void tud_resume_cb(void) {
   blink_interval_ms = tud_mounted() ? BLINK_MOUNTED : BLINK_NOT_MOUNTED;
 }
 
 //--------------------------------------------------------------------+
 // BLINKING TASK
 //--------------------------------------------------------------------+
-void led_blinking_task(void)
-{
+void led_blinking_task(void) {
   static uint32_t start_ms = 0;
   static bool led_state = false;
 
   // Blink every interval ms
-  if ( board_millis() - start_ms < blink_interval_ms) return; // not enough time
+  if (board_millis() - start_ms < blink_interval_ms) return; // not enough time
   start_ms += blink_interval_ms;
 
   board_led_write(led_state);
diff --git a/examples/device/msc_dual_lun/src/msc_disk_dual.c b/examples/device/msc_dual_lun/src/msc_disk_dual.c
index 4f0f6410f..b44b77c6c 100644
--- a/examples/device/msc_dual_lun/src/msc_disk_dual.c
+++ b/examples/device/msc_dual_lun/src/msc_disk_dual.c
@@ -34,9 +34,13 @@
 // Some MCU doesn't have enough 8KB SRAM to store the whole disk
 // We will use Flash as read-only disk with board that has
 // CFG_EXAMPLE_MSC_READONLY defined
+#if defined(CFG_EXAMPLE_MSC_READONLY) || defined(CFG_EXAMPLE_MSC_DUAL_READONLY)
+  #define MSC_CONST const
+#else
+  #define MSC_CONST
+#endif
 
-enum
-{
+enum {
   DISK_BLOCK_NUM  = 16, // 8KB is the smallest size that windows allow to mount
   DISK_BLOCK_SIZE = 512
 };
@@ -51,10 +55,7 @@ If you find any bugs or get any questions, feel free to file an\r\n\
 issue at github.com/hathach/tinyusb"
 
 
-#ifdef CFG_EXAMPLE_MSC_READONLY
-const
-#endif
-uint8_t msc_disk0[DISK_BLOCK_NUM][DISK_BLOCK_SIZE] =
+MSC_CONST uint8_t msc_disk0[DISK_BLOCK_NUM][DISK_BLOCK_SIZE] =
 {
   //------------- Block0: Boot Sector -------------//
   // byte_per_sector    = DISK_BLOCK_SIZE; fat12_sector_num_16  = DISK_BLOCK_NUM;
@@ -132,10 +133,7 @@ uint8_t msc_disk0[DISK_BLOCK_NUM][DISK_BLOCK_SIZE] =
 If you find any bugs or get any questions, feel free to file an\r\n\
 issue at github.com/hathach/tinyusb"
 
-#ifdef CFG_EXAMPLE_MSC_READONLY
-const
-#endif
-uint8_t msc_disk1[DISK_BLOCK_NUM][DISK_BLOCK_SIZE] =
+MSC_CONST uint8_t msc_disk1[DISK_BLOCK_NUM][DISK_BLOCK_SIZE] =
 {
   //------------- Block0: Boot Sector -------------//
   // byte_per_sector    = DISK_BLOCK_SIZE; fat12_sector_num_16  = DISK_BLOCK_NUM;
@@ -206,15 +204,13 @@ uint8_t msc_disk1[DISK_BLOCK_NUM][DISK_BLOCK_SIZE] =
 };
 
 // Invoked to determine max LUN
-uint8_t tud_msc_get_maxlun_cb(void)
-{
+uint8_t tud_msc_get_maxlun_cb(void) {
   return 2; // dual LUN
 }
 
 // Invoked when received SCSI_CMD_INQUIRY
 // Application fill vendor id, product id and revision with string up to 8, 16, 4 characters respectively
-void tud_msc_inquiry_cb(uint8_t lun, uint8_t vendor_id[8], uint8_t product_id[16], uint8_t product_rev[4])
-{
+void tud_msc_inquiry_cb(uint8_t lun, uint8_t vendor_id[8], uint8_t product_id[16], uint8_t product_rev[4]) {
   (void) lun; // use same ID for both LUNs
 
   const char vid[] = "TinyUSB";
@@ -228,8 +224,7 @@ void tud_msc_inquiry_cb(uint8_t lun, uint8_t vendor_id[8], uint8_t product_id[16
 
 // Invoked when received Test Unit Ready command.
 // return true allowing host to read/write this LUN e.g SD card inserted
-bool tud_msc_test_unit_ready_cb(uint8_t lun)
-{
+bool tud_msc_test_unit_ready_cb(uint8_t lun) {
   if ( lun == 1 && board_button_read() ) return false;
 
   return true; // RAM disk is always ready
@@ -237,8 +232,7 @@ bool tud_msc_test_unit_ready_cb(uint8_t lun)
 
 // Invoked when received SCSI_CMD_READ_CAPACITY_10 and SCSI_CMD_READ_FORMAT_CAPACITY to determine the disk size
 // Application update block count and block size
-void tud_msc_capacity_cb(uint8_t lun, uint32_t* block_count, uint16_t* block_size)
-{
+void tud_msc_capacity_cb(uint8_t lun, uint32_t* block_count, uint16_t* block_size) {
   (void) lun;
 
   *block_count = DISK_BLOCK_NUM;
@@ -248,18 +242,14 @@ void tud_msc_capacity_cb(uint8_t lun, uint32_t* block_count, uint16_t* block_siz
 // Invoked when received Start Stop Unit command
 // - Start = 0 : stopped power mode, if load_eject = 1 : unload disk storage
 // - Start = 1 : active mode, if load_eject = 1 : load disk storage
-bool tud_msc_start_stop_cb(uint8_t lun, uint8_t power_condition, bool start, bool load_eject)
-{
+bool tud_msc_start_stop_cb(uint8_t lun, uint8_t power_condition, bool start, bool load_eject) {
   (void) lun;
   (void) power_condition;
 
-  if ( load_eject )
-  {
-    if (start)
-    {
+  if (load_eject) {
+    if (start) {
       // load disk storage
-    }else
-    {
+    } else {
       // unload disk storage
     }
   }
@@ -269,10 +259,9 @@ bool tud_msc_start_stop_cb(uint8_t lun, uint8_t power_condition, bool start, boo
 
 // Callback invoked when received READ10 command.
 // Copy disk's data to buffer (up to bufsize) and return number of copied bytes.
-int32_t tud_msc_read10_cb(uint8_t lun, uint32_t lba, uint32_t offset, void* buffer, uint32_t bufsize)
-{
+int32_t tud_msc_read10_cb(uint8_t lun, uint32_t lba, uint32_t offset, void* buffer, uint32_t bufsize) {
   // out of ramdisk
-  if ( lba >= DISK_BLOCK_NUM ) return -1;
+  if (lba >= DISK_BLOCK_NUM) return -1;
 
   uint8_t const* addr = (lun ? msc_disk1[lba] : msc_disk0[lba]) + offset;
   memcpy(buffer, addr, bufsize);
@@ -280,11 +269,10 @@ int32_t tud_msc_read10_cb(uint8_t lun, uint32_t lba, uint32_t offset, void* buff
   return (int32_t) bufsize;
 }
 
-bool tud_msc_is_writable_cb (uint8_t lun)
-{
+bool tud_msc_is_writable_cb(uint8_t lun) {
   (void) lun;
 
-#ifdef CFG_EXAMPLE_MSC_READONLY
+#if defined(CFG_EXAMPLE_MSC_READONLY) || defined(CFG_EXAMPLE_MSC_DUAL_READONLY)
   return false;
 #else
   return true;
@@ -293,16 +281,18 @@ bool tud_msc_is_writable_cb (uint8_t lun)
 
 // Callback invoked when received WRITE10 command.
 // Process data in buffer to disk's storage and return number of written bytes
-int32_t tud_msc_write10_cb(uint8_t lun, uint32_t lba, uint32_t offset, uint8_t* buffer, uint32_t bufsize)
-{
+int32_t tud_msc_write10_cb(uint8_t lun, uint32_t lba, uint32_t offset, uint8_t* buffer, uint32_t bufsize) {
   // out of ramdisk
-  if ( lba >= DISK_BLOCK_NUM ) return -1;
+  if (lba >= DISK_BLOCK_NUM) return -1;
 
-#ifndef CFG_EXAMPLE_MSC_READONLY
+#if defined(CFG_EXAMPLE_MSC_READONLY) || defined(CFG_EXAMPLE_MSC_DUAL_READONLY)
+  (void) lun;
+  (void) lba;
+  (void) offset;
+  (void) buffer;
+#else
   uint8_t* addr = (lun ? msc_disk1[lba] : msc_disk0[lba])  + offset;
   memcpy(addr, buffer, bufsize);
-#else
-  (void) lun; (void) lba; (void) offset; (void) buffer;
 #endif
 
   return (int32_t) bufsize;
@@ -310,38 +300,30 @@ int32_t tud_msc_write10_cb(uint8_t lun, uint32_t lba, uint32_t offset, uint8_t*
 
 // Callback invoked when received an SCSI command not in built-in list below
 // - READ_CAPACITY10, READ_FORMAT_CAPACITY, INQUIRY, MODE_SENSE6, REQUEST_SENSE
-// - READ10 and WRITE10 has their own callbacks
-int32_t tud_msc_scsi_cb (uint8_t lun, uint8_t const scsi_cmd[16], void* buffer, uint16_t bufsize)
-{
-  // read10 & write10 has their own callback and MUST not be handled here
-
+// - READ10 and WRITE10 has their own callbacks (MUST not be handled here)
+int32_t tud_msc_scsi_cb(uint8_t lun, uint8_t const scsi_cmd[16], void* buffer, uint16_t bufsize) {
   void const* response = NULL;
   int32_t resplen = 0;
 
   // most scsi handled is input
   bool in_xfer = true;
 
-  switch (scsi_cmd[0])
-  {
+  switch (scsi_cmd[0]) {
     default:
       // Set Sense = Invalid Command Operation
       tud_msc_set_sense(lun, SCSI_SENSE_ILLEGAL_REQUEST, 0x20, 0x00);
 
       // negative means error -> tinyusb could stall and/or response with failed status
-      resplen = -1;
-    break;
+      return -1;
   }
 
   // return resplen must not larger than bufsize
-  if ( resplen > bufsize ) resplen = bufsize;
+  if (resplen > bufsize) resplen = bufsize;
 
-  if ( response && (resplen > 0) )
-  {
-    if(in_xfer)
-    {
+  if (response && (resplen > 0)) {
+    if (in_xfer) {
       memcpy(buffer, response, (size_t) resplen);
-    }else
-    {
+    } else {
       // SCSI output
     }
   }
diff --git a/examples/device/net_lwip_webserver/CMakeLists.txt b/examples/device/net_lwip_webserver/CMakeLists.txt
index a16b8bd71..13923b583 100644
--- a/examples/device/net_lwip_webserver/CMakeLists.txt
+++ b/examples/device/net_lwip_webserver/CMakeLists.txt
@@ -5,7 +5,14 @@ include(${CMAKE_CURRENT_LIST_DIR}/../../../hw/bsp/family_support.cmake)
 # gets PROJECT name for the example (e.g. <BOARD>-<DIR_NAME>)
 family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
 
+# Prefer the tinyusb lwip
 set(LWIP ${TOP}/lib/lwip)
+
+# If we can't find one from tinyusb then check cmake var before giving up
+if (NOT EXISTS ${LWIP}/src)
+  set(LWIP ${TINYUSB_LWIP_PATH})
+endif()
+
 if (NOT EXISTS ${LWIP}/src)
   family_example_missing_dependency(${PROJECT} "lib/lwip")
   return()
@@ -74,6 +81,7 @@ target_sources(${PROJECT} PUBLIC
   ${LWIP}/src/netif/slipif.c
   ${LWIP}/src/apps/http/httpd.c
   ${LWIP}/src/apps/http/fs.c
+  ${LWIP}/src/apps/lwiperf/lwiperf.c
   )
 
 # due to warnings from other net source, we need to prevent error from some of the warnings options
diff --git a/examples/device/net_lwip_webserver/Makefile b/examples/device/net_lwip_webserver/Makefile
index 22426ba0d..141532466 100644
--- a/examples/device/net_lwip_webserver/Makefile
+++ b/examples/device/net_lwip_webserver/Makefile
@@ -63,6 +63,7 @@ SRC_C += \
   lib/lwip/src/netif/slipif.c \
   lib/lwip/src/apps/http/httpd.c \
   lib/lwip/src/apps/http/fs.c \
+  lib/lwip/src/apps/lwiperf/lwiperf.c \
   lib/networking/dhserver.c \
   lib/networking/dnserver.c \
   lib/networking/rndis_reports.c
diff --git a/examples/device/net_lwip_webserver/skip.txt b/examples/device/net_lwip_webserver/skip.txt
index 75aa2ef14..85c450e82 100644
--- a/examples/device/net_lwip_webserver/skip.txt
+++ b/examples/device/net_lwip_webserver/skip.txt
@@ -1,12 +1,18 @@
+mcu:CH32V103
+mcu:CH32V20X
 mcu:LPC11UXX
 mcu:LPC13XX
+mcu:LPC15XX
 mcu:MSP430x5xx
 mcu:NUC121
 mcu:SAMD11
 mcu:STM32L0
+mcu:STM32F0
 mcu:KINETIS_KL
 family:broadcom_64bit
 family:broadcom_32bit
+family:espressif
 board:curiosity_nano
 board:frdm_kl25z
-family:espressif
+# lpc55 has weird error 'ncm_interface' causes a section type conflict with 'ntb_parameters'
+family:lpc55
diff --git a/examples/device/net_lwip_webserver/src/lwipopts.h b/examples/device/net_lwip_webserver/src/lwipopts.h
index 336c9243d..41e8f0d67 100644
--- a/examples/device/net_lwip_webserver/src/lwipopts.h
+++ b/examples/device/net_lwip_webserver/src/lwipopts.h
@@ -48,8 +48,8 @@
 #define LWIP_IP_ACCEPT_UDP_PORT(p)      ((p) == PP_NTOHS(67))
 
 #define TCP_MSS                         (1500 /*mtu*/ - 20 /*iphdr*/ - 20 /*tcphhr*/)
-#define TCP_SND_BUF                     (2 * TCP_MSS)
-#define TCP_WND                         (TCP_MSS)
+#define TCP_SND_BUF                     (4 * TCP_MSS)
+#define TCP_WND                         (4 * TCP_MSS)
 
 #define ETHARP_SUPPORT_STATIC_ENTRIES   1
 
@@ -59,7 +59,7 @@
 
 #define LWIP_SINGLE_NETIF               1
 
-#define PBUF_POOL_SIZE                  2
+#define PBUF_POOL_SIZE                  4
 
 #define HTTPD_USE_CUSTOM_FSDATA         0
 
diff --git a/examples/device/net_lwip_webserver/src/main.c b/examples/device/net_lwip_webserver/src/main.c
index 7d98aacbc..791e09b4f 100644
--- a/examples/device/net_lwip_webserver/src/main.c
+++ b/examples/device/net_lwip_webserver/src/main.c
@@ -48,12 +48,17 @@ try changing the first byte of tud_network_mac_address[] below from 0x02 to 0x00
 
 #include "dhserver.h"
 #include "dnserver.h"
+#include "httpd.h"
+#include "lwip/ethip6.h"
 #include "lwip/init.h"
 #include "lwip/timeouts.h"
-#include "lwip/ethip6.h"
-#include "httpd.h"
 
-#define INIT_IP4(a,b,c,d) { PP_HTONL(LWIP_MAKEU32(a,b,c,d)) }
+#ifdef INCLUDE_IPERF
+  #include "lwip/apps/lwiperf.h"
+#endif
+
+#define INIT_IP4(a, b, c, d) \
+  { PP_HTONL(LWIP_MAKEU32(a, b, c, d)) }
 
 /* lwip context */
 static struct netif netif_data;
@@ -64,44 +69,40 @@ static struct pbuf *received_frame;
 /* this is used by this code, ./class/net/net_driver.c, and usb_descriptors.c */
 /* ideally speaking, this should be generated from the hardware's unique ID (if available) */
 /* it is suggested that the first byte is 0x02 to indicate a link-local address */
-uint8_t tud_network_mac_address[6] = {0x02,0x02,0x84,0x6A,0x96,0x00};
+uint8_t tud_network_mac_address[6] = {0x02, 0x02, 0x84, 0x6A, 0x96, 0x00};
 
 /* network parameters of this MCU */
-static const ip4_addr_t ipaddr  = INIT_IP4(192, 168, 7, 1);
+static const ip4_addr_t ipaddr = INIT_IP4(192, 168, 7, 1);
 static const ip4_addr_t netmask = INIT_IP4(255, 255, 255, 0);
 static const ip4_addr_t gateway = INIT_IP4(0, 0, 0, 0);
 
 /* database IP addresses that can be offered to the host; this must be in RAM to store assigned MAC addresses */
-static dhcp_entry_t entries[] =
-{
-    /* mac ip address                          lease time */
-    { {0}, INIT_IP4(192, 168, 7, 2), 24 * 60 * 60 },
-    { {0}, INIT_IP4(192, 168, 7, 3), 24 * 60 * 60 },
-    { {0}, INIT_IP4(192, 168, 7, 4), 24 * 60 * 60 },
+static dhcp_entry_t entries[] = {
+    /* mac ip address               lease time */
+    {{0}, INIT_IP4(192, 168, 7, 2), 24 * 60 * 60},
+    {{0}, INIT_IP4(192, 168, 7, 3), 24 * 60 * 60},
+    {{0}, INIT_IP4(192, 168, 7, 4), 24 * 60 * 60},
 };
 
-static const dhcp_config_t dhcp_config =
-{
-    .router = INIT_IP4(0, 0, 0, 0),            /* router address (if any) */
-    .port = 67,                                /* listen port */
-    .dns = INIT_IP4(192, 168, 7, 1),           /* dns server (if any) */
-    "usb",                                     /* dns suffix */
-    TU_ARRAY_SIZE(entries),                    /* num entry */
-    entries                                    /* entries */
+static const dhcp_config_t dhcp_config = {
+    .router = INIT_IP4(0, 0, 0, 0),  /* router address (if any) */
+    .port = 67,                      /* listen port */
+    .dns = INIT_IP4(192, 168, 7, 1), /* dns server (if any) */
+    "usb",                           /* dns suffix */
+    TU_ARRAY_SIZE(entries),          /* num entry */
+    entries                          /* entries */
 };
-static err_t linkoutput_fn(struct netif *netif, struct pbuf *p)
-{
-  (void)netif;
 
-  for (;;)
-  {
+static err_t linkoutput_fn(struct netif *netif, struct pbuf *p) {
+  (void) netif;
+
+  for (;;) {
     /* if TinyUSB isn't ready, we must signal back to lwip that there is nothing we can do */
     if (!tud_ready())
       return ERR_USE;
 
     /* if the network driver can accept another packet, we make it happen */
-    if (tud_network_can_xmit(p->tot_len))
-    {
+    if (tud_network_can_xmit(p->tot_len)) {
       tud_network_xmit(p, 0 /* unused for this example */);
       return ERR_OK;
     }
@@ -111,20 +112,17 @@ static err_t linkoutput_fn(struct netif *netif, struct pbuf *p)
   }
 }
 
-static err_t ip4_output_fn(struct netif *netif, struct pbuf *p, const ip4_addr_t *addr)
-{
+static err_t ip4_output_fn(struct netif *netif, struct pbuf *p, const ip4_addr_t *addr) {
   return etharp_output(netif, p, addr);
 }
 
 #if LWIP_IPV6
-static err_t ip6_output_fn(struct netif *netif, struct pbuf *p, const ip6_addr_t *addr)
-{
+static err_t ip6_output_fn(struct netif *netif, struct pbuf *p, const ip6_addr_t *addr) {
   return ethip6_output(netif, p, addr);
 }
 #endif
 
-static err_t netif_init_cb(struct netif *netif)
-{
+static err_t netif_init_cb(struct netif *netif) {
   LWIP_ASSERT("netif != NULL", (netif != NULL));
   netif->mtu = CFG_TUD_NET_MTU;
   netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_LINK_UP | NETIF_FLAG_UP;
@@ -139,8 +137,7 @@ static err_t netif_init_cb(struct netif *netif)
   return ERR_OK;
 }
 
-static void init_lwip(void)
-{
+static void init_lwip(void) {
   struct netif *netif = &netif_data;
 
   lwip_init();
@@ -158,28 +155,23 @@ static void init_lwip(void)
 }
 
 /* handle any DNS requests from dns-server */
-bool dns_query_proc(const char *name, ip4_addr_t *addr)
-{
-  if (0 == strcmp(name, "tiny.usb"))
-  {
+bool dns_query_proc(const char *name, ip4_addr_t *addr) {
+  if (0 == strcmp(name, "tiny.usb")) {
     *addr = ipaddr;
     return true;
   }
   return false;
 }
 
-bool tud_network_recv_cb(const uint8_t *src, uint16_t size)
-{
+bool tud_network_recv_cb(const uint8_t *src, uint16_t size) {
   /* this shouldn't happen, but if we get another packet before
   parsing the previous, we must signal our inability to accept it */
   if (received_frame) return false;
 
-  if (size)
-  {
+  if (size) {
     struct pbuf *p = pbuf_alloc(PBUF_RAW, size, PBUF_POOL);
 
-    if (p)
-    {
+    if (p) {
       /* pbuf_alloc() has already initialized struct; all we need to do is copy the data */
       memcpy(p->payload, src, size);
 
@@ -191,20 +183,17 @@ bool tud_network_recv_cb(const uint8_t *src, uint16_t size)
   return true;
 }
 
-uint16_t tud_network_xmit_cb(uint8_t *dst, void *ref, uint16_t arg)
-{
-  struct pbuf *p = (struct pbuf *)ref;
+uint16_t tud_network_xmit_cb(uint8_t *dst, void *ref, uint16_t arg) {
+  struct pbuf *p = (struct pbuf *) ref;
 
-  (void)arg; /* unused for this example */
+  (void) arg; /* unused for this example */
 
   return pbuf_copy_partial(p, dst, p->tot_len, 0);
 }
 
-static void service_traffic(void)
-{
+static void service_traffic(void) {
   /* handle any packet received by tud_network_recv_cb() */
-  if (received_frame)
-  {
+  if (received_frame) {
     ethernet_input(received_frame, &netif_data);
     pbuf_free(received_frame);
     received_frame = NULL;
@@ -214,18 +203,15 @@ static void service_traffic(void)
   sys_check_timeouts();
 }
 
-void tud_network_init_cb(void)
-{
+void tud_network_init_cb(void) {
   /* if the network is re-initializing and we have a leftover packet, we must do a cleanup */
-  if (received_frame)
-  {
+  if (received_frame) {
     pbuf_free(received_frame);
     received_frame = NULL;
   }
 }
 
-int main(void)
-{
+int main(void) {
   /* initialize TinyUSB */
   board_init();
 
@@ -243,8 +229,12 @@ int main(void)
   while (dnserv_init(IP_ADDR_ANY, 53, dns_query_proc) != ERR_OK);
   httpd_init();
 
-  while (1)
-  {
+#ifdef INCLUDE_IPERF
+  // test with: iperf -c 192.168.7.1 -e -i 1 -M 5000 -l 8192 -r
+  lwiperf_start_tcp_server_default(NULL, NULL);
+#endif
+
+  while (1) {
     tud_task();
     service_traffic();
   }
@@ -253,17 +243,14 @@ int main(void)
 }
 
 /* lwip has provision for using a mutex, when applicable */
-sys_prot_t sys_arch_protect(void)
-{
+sys_prot_t sys_arch_protect(void) {
   return 0;
 }
-void sys_arch_unprotect(sys_prot_t pval)
-{
-  (void)pval;
+void sys_arch_unprotect(sys_prot_t pval) {
+  (void) pval;
 }
 
 /* lwip needs a millisecond time source, and the TinyUSB board support code has one available */
-uint32_t sys_now(void)
-{
+uint32_t sys_now(void) {
   return board_millis();
 }
diff --git a/examples/device/net_lwip_webserver/src/tusb_config.h b/examples/device/net_lwip_webserver/src/tusb_config.h
index fe72ecdfe..d3e094517 100644
--- a/examples/device/net_lwip_webserver/src/tusb_config.h
+++ b/examples/device/net_lwip_webserver/src/tusb_config.h
@@ -27,21 +27,23 @@
 #define _TUSB_CONFIG_H_
 
 #ifdef __cplusplus
- extern "C" {
+extern "C" {
 #endif
 
+#include "lwipopts.h"
+
 //--------------------------------------------------------------------+
 // Board Specific Configuration
 //--------------------------------------------------------------------+
 
 // RHPort number used for device can be defined by board.mk, default to port 0
 #ifndef BOARD_TUD_RHPORT
-#define BOARD_TUD_RHPORT      0
+  #define BOARD_TUD_RHPORT 0
 #endif
 
 // RHPort max operational speed can defined by board.mk
 #ifndef BOARD_TUD_MAX_SPEED
-#define BOARD_TUD_MAX_SPEED   OPT_MODE_DEFAULT_SPEED
+  #define BOARD_TUD_MAX_SPEED OPT_MODE_DEFAULT_SPEED
 #endif
 
 //--------------------------------------------------------------------
@@ -50,22 +52,22 @@
 
 // defined by compiler flags for flexibility
 #ifndef CFG_TUSB_MCU
-#error CFG_TUSB_MCU must be defined
+  #error CFG_TUSB_MCU must be defined
 #endif
 
 #ifndef CFG_TUSB_OS
-#define CFG_TUSB_OS           OPT_OS_NONE
+  #define CFG_TUSB_OS OPT_OS_NONE
 #endif
 
 #ifndef CFG_TUSB_DEBUG
-#define CFG_TUSB_DEBUG        0
+  #define CFG_TUSB_DEBUG 0
 #endif
 
 // Enable Device stack
-#define CFG_TUD_ENABLED       1
+#define CFG_TUD_ENABLED 1
 
 // Default is max speed that hardware controller could support with on-chip PHY
-#define CFG_TUD_MAX_SPEED     BOARD_TUD_MAX_SPEED
+#define CFG_TUD_MAX_SPEED BOARD_TUD_MAX_SPEED
 
 /* USB DMA on some MCUs can only access a specific SRAM region with restriction on alignment.
  * Tinyusb use follows macros to declare transferring memory so that they can be put
@@ -75,11 +77,45 @@
  * - CFG_TUSB_MEM_ALIGN   : __attribute__ ((aligned(4)))
  */
 #ifndef CFG_TUSB_MEM_SECTION
-#define CFG_TUSB_MEM_SECTION
+  #define CFG_TUSB_MEM_SECTION
 #endif
 
 #ifndef CFG_TUSB_MEM_ALIGN
-#define CFG_TUSB_MEM_ALIGN        __attribute__ ((aligned(4)))
+  #define CFG_TUSB_MEM_ALIGN __attribute__((aligned(4)))
+#endif
+
+// Use different configurations to test all net devices (also due to resource limitations)
+#if TU_CHECK_MCU(OPT_MCU_LPC15XX, OPT_MCU_LPC40XX, OPT_MCU_LPC51UXX, OPT_MCU_LPC54)
+  #define USE_ECM 1
+#elif TU_CHECK_MCU(OPT_MCU_SAMD21, OPT_MCU_SAML21, OPT_MCU_SAML22)
+  #define USE_ECM 1
+#elif TU_CHECK_MCU(OPT_MCU_STM32F0, OPT_MCU_STM32F1)
+  #define USE_ECM 1
+#else
+  #define USE_ECM 0
+  #define INCLUDE_IPERF
+#endif
+
+//--------------------------------------------------------------------
+// NCM CLASS CONFIGURATION, SEE "ncm.h" FOR PERFORMANCE TUNING
+//--------------------------------------------------------------------
+
+// Must be >> MTU
+// Can be set to 2048 without impact
+#define CFG_TUD_NCM_IN_NTB_MAX_SIZE (2 * TCP_MSS + 100)
+
+// Must be >> MTU
+// Can be set to smaller values if wNtbOutMaxDatagrams==1
+#define CFG_TUD_NCM_OUT_NTB_MAX_SIZE (2 * TCP_MSS + 100)
+
+// Number of NCM transfer blocks for reception side
+#ifndef CFG_TUD_NCM_OUT_NTB_N
+  #define CFG_TUD_NCM_OUT_NTB_N 1
+#endif
+
+// Number of NCM transfer blocks for transmission side
+#ifndef CFG_TUD_NCM_IN_NTB_N
+  #define CFG_TUD_NCM_IN_NTB_N 1
 #endif
 
 //--------------------------------------------------------------------
@@ -87,18 +123,18 @@
 //--------------------------------------------------------------------
 
 #ifndef CFG_TUD_ENDPOINT0_SIZE
-#define CFG_TUD_ENDPOINT0_SIZE    64
+  #define CFG_TUD_ENDPOINT0_SIZE 64
 #endif
 
 //------------- CLASS -------------//
 
 // Network class has 2 drivers: ECM/RNDIS and NCM.
 // Only one of the drivers can be enabled
-#define CFG_TUD_ECM_RNDIS     1
-#define CFG_TUD_NCM           (1-CFG_TUD_ECM_RNDIS)
+#define CFG_TUD_ECM_RNDIS     USE_ECM
+#define CFG_TUD_NCM           (1 - CFG_TUD_ECM_RNDIS)
 
 #ifdef __cplusplus
- }
+}
 #endif
 
 #endif /* _TUSB_CONFIG_H_ */
diff --git a/examples/device/uac2_headset/src/main.c b/examples/device/uac2_headset/src/main.c
index 35b7ac94b..0ea6e7025 100644
--- a/examples/device/uac2_headset/src/main.c
+++ b/examples/device/uac2_headset/src/main.c
@@ -35,11 +35,7 @@
 //--------------------------------------------------------------------+
 
 // List of supported sample rates
-#if defined(__RX__)
-  const uint32_t sample_rates[] = {44100, 48000};
-#else
-  const uint32_t sample_rates[] = {44100, 48000, 88200, 96000};
-#endif
+const uint32_t sample_rates[] = {44100, 48000};
 
 uint32_t current_sample_rate  = 44100;
 
@@ -161,7 +157,7 @@ static bool tud_audio_clock_get_request(uint8_t rhport, audio_control_request_t
   {
     if (request->bRequest == AUDIO_CS_REQ_CUR)
     {
-      TU_LOG1("Clock get current freq %lu\r\n", current_sample_rate);
+      TU_LOG1("Clock get current freq %" PRIu32 "\r\n", current_sample_rate);
 
       audio_control_cur_4_t curf = { (int32_t) tu_htole32(current_sample_rate) };
       return tud_audio_buffer_and_schedule_control_xfer(rhport, (tusb_control_request_t const *)request, &curf, sizeof(curf));
@@ -210,7 +206,7 @@ static bool tud_audio_clock_set_request(uint8_t rhport, audio_control_request_t
 
     current_sample_rate = (uint32_t) ((audio_control_cur_4_t const *)buf)->bCur;
 
-    TU_LOG1("Clock set current freq: %ld\r\n", current_sample_rate);
+    TU_LOG1("Clock set current freq: %" PRIu32 "\r\n", current_sample_rate);
 
     return true;
   }
diff --git a/examples/device/uac2_headset/src/tusb_config.h b/examples/device/uac2_headset/src/tusb_config.h
index 4b08fa676..328e35f52 100644
--- a/examples/device/uac2_headset/src/tusb_config.h
+++ b/examples/device/uac2_headset/src/tusb_config.h
@@ -114,11 +114,9 @@ extern "C" {
 #define CFG_TUD_AUDIO_FUNC_1_N_FORMATS                               2
 
 // Audio format type I specifications
-#if defined(__RX__)
-#define CFG_TUD_AUDIO_FUNC_1_MAX_SAMPLE_RATE                         48000     // 16bit/48kHz is the best quality for Renesas RX
-#else
-#define CFG_TUD_AUDIO_FUNC_1_MAX_SAMPLE_RATE                         96000     // 24bit/96kHz is the best quality for full-speed, high-speed is needed beyond this
-#endif
+/* 24bit/48kHz is the best quality for headset or 24bit/96kHz for 2ch speaker,
+   high-speed is needed beyond this */
+#define CFG_TUD_AUDIO_FUNC_1_MAX_SAMPLE_RATE                         48000
 #define CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX                           1
 #define CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_RX                           2
 
diff --git a/examples/device/video_capture/skip.txt b/examples/device/video_capture/skip.txt
index db64cc639..cb0c7d2e6 100644
--- a/examples/device/video_capture/skip.txt
+++ b/examples/device/video_capture/skip.txt
@@ -1,4 +1,5 @@
+mcu:CH32V103
+mcu:CH32V20X
 mcu:MSP430x5xx
 mcu:NUC121
 mcu:SAMD11
-family:espressif
diff --git a/examples/device/video_capture/src/main.c b/examples/device/video_capture/src/main.c
index 2a2b0961f..ddb51e03a 100644
--- a/examples/device/video_capture/src/main.c
+++ b/examples/device/video_capture/src/main.c
@@ -288,7 +288,7 @@ void led_blinking_task(void* param) {
 #define BLINKY_STACK_SIZE   configMINIMAL_STACK_SIZE
 #define VIDEO_STACK_SIZE    (configMINIMAL_STACK_SIZE*4)
 
-#if TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
+#if TUP_MCU_ESPRESSIF
   #define USBD_STACK_SIZE     4096
   int main(void);
   void app_main(void) {
@@ -344,7 +344,7 @@ void freertos_init_task(void) {
   #endif
 
   // skip starting scheduler (and return) for ESP32-S2 or ESP32-S3
-  #if !TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
+  #if !TUP_MCU_ESPRESSIF
   vTaskStartScheduler();
   #endif
 }
diff --git a/examples/device/video_capture/src/tusb_config.h b/examples/device/video_capture/src/tusb_config.h
index bdfc37d87..21483a2da 100644
--- a/examples/device/video_capture/src/tusb_config.h
+++ b/examples/device/video_capture/src/tusb_config.h
@@ -58,7 +58,7 @@
 #endif
 
 // Espressif IDF requires "freertos/" prefix in include path
-#if TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
+#if TUP_MCU_ESPRESSIF
 #define CFG_TUSB_OS_INC_PATH  freertos/
 #endif
 
diff --git a/examples/device/video_capture_2ch/skip.txt b/examples/device/video_capture_2ch/skip.txt
index b36abf721..af3b0de04 100644
--- a/examples/device/video_capture_2ch/skip.txt
+++ b/examples/device/video_capture_2ch/skip.txt
@@ -2,7 +2,10 @@ mcu:MSP430x5xx
 mcu:NUC121
 mcu:SAMD11
 mcu:GD32VF103
+mcu:CH32V103
+mcu:CH32V20X
 mcu:CH32V307
+mcu:STM32L0
 family:espressif
 board:curiosity_nano
 board:kuiic
@@ -11,3 +14,5 @@ board:lpcxpresso11u68
 board:stm32f303disco
 board:stm32l412nucleo
 board:ek_tm4c123gxl
+board:uno_r4
+board:ra4m1_ek
diff --git a/examples/device/video_capture_2ch/src/main.c b/examples/device/video_capture_2ch/src/main.c
index 82bc7d6ca..e8c2ec6b0 100644
--- a/examples/device/video_capture_2ch/src/main.c
+++ b/examples/device/video_capture_2ch/src/main.c
@@ -184,7 +184,7 @@ size_t get_framebuf(uint_fast8_t ctl_idx, uint_fast8_t stm_idx, size_t fnum, voi
   if (idx == 0) {
     // stream 0 use uncompressed YUY2 frame
     #if defined(CFG_EXAMPLE_VIDEO_READONLY)
-    *fb = (void*)(uintptr_t ) framebuf_yuy2_readonly[(fnum % (FRAME_WIDTH / 2)) * 4];
+    *fb = (void*)(uintptr_t ) &framebuf_yuy2_readonly[(fnum % (FRAME_WIDTH / 2)) * 4];
     #else
     fill_color_bar(framebuf_yuy2, frame_num[idx]);
     *fb = framebuf_yuy2;
@@ -296,7 +296,7 @@ void led_blinking_task(void* param) {
 #define BLINKY_STACK_SIZE   configMINIMAL_STACK_SIZE
 #define VIDEO_STACK_SIZE    (configMINIMAL_STACK_SIZE*4)
 
-#if TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
+#if TUP_MCU_ESPRESSIF
   #define USBD_STACK_SIZE     4096
   int main(void);
   void app_main(void) {
@@ -352,7 +352,7 @@ void freertos_init_task(void) {
   #endif
 
   // skip starting scheduler (and return) for ESP32-S2 or ESP32-S3
-  #if !TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
+  #if !TUP_MCU_ESPRESSIF
   vTaskStartScheduler();
   #endif
 }
diff --git a/examples/device/video_capture_2ch/src/tusb_config.h b/examples/device/video_capture_2ch/src/tusb_config.h
index fe66d63b5..43c7dfc90 100644
--- a/examples/device/video_capture_2ch/src/tusb_config.h
+++ b/examples/device/video_capture_2ch/src/tusb_config.h
@@ -58,7 +58,7 @@
 #endif
 
 // Espressif IDF requires "freertos/" prefix in include path
-#if TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
+#if TUP_MCU_ESPRESSIF
 #define CFG_TUSB_OS_INC_PATH  freertos/
 #endif
 
diff --git a/examples/dual/CMakeLists.txt b/examples/dual/CMakeLists.txt
index 15081cf26..f11074e93 100644
--- a/examples/dual/CMakeLists.txt
+++ b/examples/dual/CMakeLists.txt
@@ -10,4 +10,5 @@ if (FAMILY STREQUAL "rp2040" AND NOT TARGET tinyusb_pico_pio_usb)
 else ()
   # family_add_subdirectory will filter what to actually add based on selected FAMILY
   family_add_subdirectory(host_hid_to_device_cdc)
+  family_add_subdirectory(host_info_to_device_cdc)
 endif ()
diff --git a/examples/dual/host_hid_to_device_cdc/src/main.c b/examples/dual/host_hid_to_device_cdc/src/main.c
index 96a2beff5..0b4165e38 100644
--- a/examples/dual/host_hid_to_device_cdc/src/main.c
+++ b/examples/dual/host_hid_to_device_cdc/src/main.c
@@ -55,14 +55,14 @@ const uint8_t colemak[128] = {
 };
 #endif
 
-static uint8_t const keycode2ascii[128][2] =  { HID_KEYCODE_TO_ASCII };
+static uint8_t const keycode2ascii[128][2] = {HID_KEYCODE_TO_ASCII};
 
 /* Blink pattern
  * - 250 ms  : device not mounted
  * - 1000 ms : device mounted
  * - 2500 ms : device is suspended
  */
-enum  {
+enum {
   BLINK_NOT_MOUNTED = 250,
   BLINK_MOUNTED = 1000,
   BLINK_SUSPENDED = 2500,
@@ -73,8 +73,7 @@ static uint32_t blink_interval_ms = BLINK_NOT_MOUNTED;
 void led_blinking_task(void);
 
 /*------------- MAIN -------------*/
-int main(void)
-{
+int main(void) {
   board_init();
 
   printf("TinyUSB Host HID <-> Device CDC Example\r\n");
@@ -87,8 +86,7 @@ int main(void)
     board_init_after_tusb();
   }
 
-  while (1)
-  {
+  while (1) {
     tud_task(); // tinyusb device task
     tuh_task(); // tinyusb host task
     led_blinking_task();
@@ -102,35 +100,30 @@ int main(void)
 //--------------------------------------------------------------------+
 
 // Invoked when device is mounted
-void tud_mount_cb(void)
-{
+void tud_mount_cb(void) {
   blink_interval_ms = BLINK_MOUNTED;
 }
 
 // Invoked when device is unmounted
-void tud_umount_cb(void)
-{
+void tud_umount_cb(void) {
   blink_interval_ms = BLINK_NOT_MOUNTED;
 }
 
 // Invoked when usb bus is suspended
 // remote_wakeup_en : if host allow us  to perform remote wakeup
 // Within 7ms, device must draw an average of current less than 2.5 mA from bus
-void tud_suspend_cb(bool remote_wakeup_en)
-{
+void tud_suspend_cb(bool remote_wakeup_en) {
   (void) remote_wakeup_en;
   blink_interval_ms = BLINK_SUSPENDED;
 }
 
 // Invoked when usb bus is resumed
-void tud_resume_cb(void)
-{
+void tud_resume_cb(void) {
   blink_interval_ms = tud_mounted() ? BLINK_MOUNTED : BLINK_NOT_MOUNTED;
 }
 
 // Invoked when CDC interface received data from host
-void tud_cdc_rx_cb(uint8_t itf)
-{
+void tud_cdc_rx_cb(uint8_t itf) {
   (void) itf;
 
   char buf[64];
@@ -149,38 +142,36 @@ void tud_cdc_rx_cb(uint8_t itf)
 // can be used to parse common/simple enough descriptor.
 // Note: if report descriptor length > CFG_TUH_ENUMERATION_BUFSIZE, it will be skipped
 // therefore report_desc = NULL, desc_len = 0
-void tuh_hid_mount_cb(uint8_t dev_addr, uint8_t instance, uint8_t const* desc_report, uint16_t desc_len)
-{
-  (void)desc_report;
-  (void)desc_len;
+void tuh_hid_mount_cb(uint8_t dev_addr, uint8_t instance, uint8_t const* desc_report, uint16_t desc_len) {
+  (void) desc_report;
+  (void) desc_len;
 
   // Interface protocol (hid_interface_protocol_enum_t)
-  const char* protocol_str[] = { "None", "Keyboard", "Mouse" };
+  const char* protocol_str[] = {"None", "Keyboard", "Mouse"};
   uint8_t const itf_protocol = tuh_hid_interface_protocol(dev_addr, instance);
 
   uint16_t vid, pid;
   tuh_vid_pid_get(dev_addr, &vid, &pid);
 
   char tempbuf[256];
-  int count = sprintf(tempbuf, "[%04x:%04x][%u] HID Interface%u, Protocol = %s\r\n", vid, pid, dev_addr, instance, protocol_str[itf_protocol]);
+  int count = sprintf(
+      tempbuf, "[%04x:%04x][%u] HID Interface%u, Protocol = %s\r\n", vid, pid, dev_addr, instance,
+      protocol_str[itf_protocol]);
 
   tud_cdc_write(tempbuf, (uint32_t) count);
   tud_cdc_write_flush();
 
   // Receive report from boot keyboard & mouse only
   // tuh_hid_report_received_cb() will be invoked when report is available
-  if (itf_protocol == HID_ITF_PROTOCOL_KEYBOARD || itf_protocol == HID_ITF_PROTOCOL_MOUSE)
-  {
-    if ( !tuh_hid_receive_report(dev_addr, instance) )
-    {
+  if (itf_protocol == HID_ITF_PROTOCOL_KEYBOARD || itf_protocol == HID_ITF_PROTOCOL_MOUSE) {
+    if (!tuh_hid_receive_report(dev_addr, instance)) {
       tud_cdc_write_str("Error: cannot request report\r\n");
     }
   }
 }
 
 // Invoked when device with hid interface is un-mounted
-void tuh_hid_umount_cb(uint8_t dev_addr, uint8_t instance)
-{
+void tuh_hid_umount_cb(uint8_t dev_addr, uint8_t instance) {
   char tempbuf[256];
   int count = sprintf(tempbuf, "[%u] HID Interface%u is unmounted\r\n", dev_addr, instance);
   tud_cdc_write(tempbuf, (uint32_t) count);
@@ -188,11 +179,9 @@ void tuh_hid_umount_cb(uint8_t dev_addr, uint8_t instance)
 }
 
 // look up new key in previous keys
-static inline bool find_key_in_report(hid_keyboard_report_t const *report, uint8_t keycode)
-{
-  for(uint8_t i=0; i<6; i++)
-  {
-    if (report->keycode[i] == keycode)  return true;
+static inline bool find_key_in_report(hid_keyboard_report_t const* report, uint8_t keycode) {
+  for (uint8_t i = 0; i < 6; i++) {
+    if (report->keycode[i] == keycode) return true;
   }
 
   return false;
@@ -200,22 +189,17 @@ static inline bool find_key_in_report(hid_keyboard_report_t const *report, uint8
 
 
 // convert hid keycode to ascii and print via usb device CDC (ignore non-printable)
-static void process_kbd_report(uint8_t dev_addr, hid_keyboard_report_t const *report)
-{
+static void process_kbd_report(uint8_t dev_addr, hid_keyboard_report_t const* report) {
   (void) dev_addr;
-  static hid_keyboard_report_t prev_report = { 0, 0, {0} }; // previous report to check key released
+  static hid_keyboard_report_t prev_report = {0, 0, {0}}; // previous report to check key released
   bool flush = false;
 
-  for(uint8_t i=0; i<6; i++)
-  {
+  for (uint8_t i = 0; i < 6; i++) {
     uint8_t keycode = report->keycode[i];
-    if ( keycode )
-    {
-      if ( find_key_in_report(&prev_report, keycode) )
-      {
+    if (keycode) {
+      if (find_key_in_report(&prev_report, keycode)) {
         // exist in previous report means the current key is holding
-      }else
-      {
+      } else {
         // not existed in previous report means the current key is pressed
 
         // remap the key code for Colemak layout
@@ -227,8 +211,7 @@ static void process_kbd_report(uint8_t dev_addr, hid_keyboard_report_t const *re
         bool const is_shift = report->modifier & (KEYBOARD_MODIFIER_LEFTSHIFT | KEYBOARD_MODIFIER_RIGHTSHIFT);
         uint8_t ch = keycode2ascii[keycode][is_shift ? 1 : 0];
 
-        if (ch)
-        {
+        if (ch) {
           if (ch == '\n') tud_cdc_write("\r", 1);
           tud_cdc_write(&ch, 1);
           flush = true;
@@ -244,13 +227,12 @@ static void process_kbd_report(uint8_t dev_addr, hid_keyboard_report_t const *re
 }
 
 // send mouse report to usb device CDC
-static void process_mouse_report(uint8_t dev_addr, hid_mouse_report_t const * report)
-{
+static void process_mouse_report(uint8_t dev_addr, hid_mouse_report_t const* report) {
   //------------- button state  -------------//
   //uint8_t button_changed_mask = report->buttons ^ prev_report.buttons;
-  char l = report->buttons & MOUSE_BUTTON_LEFT   ? 'L' : '-';
+  char l = report->buttons & MOUSE_BUTTON_LEFT ? 'L' : '-';
   char m = report->buttons & MOUSE_BUTTON_MIDDLE ? 'M' : '-';
-  char r = report->buttons & MOUSE_BUTTON_RIGHT  ? 'R' : '-';
+  char r = report->buttons & MOUSE_BUTTON_RIGHT ? 'R' : '-';
 
   char tempbuf[32];
   int count = sprintf(tempbuf, "[%u] %c%c%c %d %d %d\r\n", dev_addr, l, m, r, report->x, report->y, report->wheel);
@@ -260,27 +242,25 @@ static void process_mouse_report(uint8_t dev_addr, hid_mouse_report_t const * re
 }
 
 // Invoked when received report from device via interrupt endpoint
-void tuh_hid_report_received_cb(uint8_t dev_addr, uint8_t instance, uint8_t const* report, uint16_t len)
-{
+void tuh_hid_report_received_cb(uint8_t dev_addr, uint8_t instance, uint8_t const* report, uint16_t len) {
   (void) len;
   uint8_t const itf_protocol = tuh_hid_interface_protocol(dev_addr, instance);
 
-  switch(itf_protocol)
-  {
+  switch (itf_protocol) {
     case HID_ITF_PROTOCOL_KEYBOARD:
-      process_kbd_report(dev_addr, (hid_keyboard_report_t const*) report );
-    break;
+      process_kbd_report(dev_addr, (hid_keyboard_report_t const*) report);
+      break;
 
     case HID_ITF_PROTOCOL_MOUSE:
-      process_mouse_report(dev_addr, (hid_mouse_report_t const*) report );
-    break;
+      process_mouse_report(dev_addr, (hid_mouse_report_t const*) report);
+      break;
 
-    default: break;
+    default:
+      break;
   }
 
   // continue to request to receive report
-  if ( !tuh_hid_receive_report(dev_addr, instance) )
-  {
+  if (!tuh_hid_receive_report(dev_addr, instance)) {
     tud_cdc_write_str("Error: cannot request report\r\n");
   }
 }
@@ -288,13 +268,12 @@ void tuh_hid_report_received_cb(uint8_t dev_addr, uint8_t instance, uint8_t cons
 //--------------------------------------------------------------------+
 // Blinking Task
 //--------------------------------------------------------------------+
-void led_blinking_task(void)
-{
+void led_blinking_task(void) {
   static uint32_t start_ms = 0;
   static bool led_state = false;
 
   // Blink every interval ms
-  if ( board_millis() - start_ms < blink_interval_ms) return; // not enough time
+  if (board_millis() - start_ms < blink_interval_ms) return; // not enough time
   start_ms += blink_interval_ms;
 
   board_led_write(led_state);
diff --git a/examples/dual/host_hid_to_device_cdc/src/tusb_config.h b/examples/dual/host_hid_to_device_cdc/src/tusb_config.h
index 8133ed418..2843e0b83 100644
--- a/examples/dual/host_hid_to_device_cdc/src/tusb_config.h
+++ b/examples/dual/host_hid_to_device_cdc/src/tusb_config.h
@@ -23,8 +23,8 @@
  *
  */
 
-#ifndef _TUSB_CONFIG_H_
-#define _TUSB_CONFIG_H_
+#ifndef TUSB_CONFIG_H_
+#define TUSB_CONFIG_H_
 
 #ifdef __cplusplus
  extern "C" {
@@ -144,4 +144,4 @@
  }
 #endif
 
-#endif /* _TUSB_CONFIG_H_ */
+#endif
diff --git a/examples/dual/host_hid_to_device_cdc/src/usb_descriptors.c b/examples/dual/host_hid_to_device_cdc/src/usb_descriptors.c
index 293620042..9d57737fb 100644
--- a/examples/dual/host_hid_to_device_cdc/src/usb_descriptors.c
+++ b/examples/dual/host_hid_to_device_cdc/src/usb_descriptors.c
@@ -42,44 +42,41 @@
 //--------------------------------------------------------------------+
 // Device Descriptors
 //--------------------------------------------------------------------+
-tusb_desc_device_t const desc_device =
-{
-  .bLength            = sizeof(tusb_desc_device_t),
-  .bDescriptorType    = TUSB_DESC_DEVICE,
-  .bcdUSB             = USB_BCD,
+tusb_desc_device_t const desc_device = {
+    .bLength            = sizeof(tusb_desc_device_t),
+    .bDescriptorType    = TUSB_DESC_DEVICE,
+    .bcdUSB             = USB_BCD,
 
-  // Use Interface Association Descriptor (IAD) for CDC
-  // As required by USB Specs IAD's subclass must be common class (2) and protocol must be IAD (1)
-  .bDeviceClass       = TUSB_CLASS_MISC,
-  .bDeviceSubClass    = MISC_SUBCLASS_COMMON,
-  .bDeviceProtocol    = MISC_PROTOCOL_IAD,
+    // Use Interface Association Descriptor (IAD) for CDC
+    // As required by USB Specs IAD's subclass must be common class (2) and protocol must be IAD (1)
+    .bDeviceClass       = TUSB_CLASS_MISC,
+    .bDeviceSubClass    = MISC_SUBCLASS_COMMON,
+    .bDeviceProtocol    = MISC_PROTOCOL_IAD,
 
-  .bMaxPacketSize0    = CFG_TUD_ENDPOINT0_SIZE,
+    .bMaxPacketSize0    = CFG_TUD_ENDPOINT0_SIZE,
 
-  .idVendor           = USB_VID,
-  .idProduct          = USB_PID,
-  .bcdDevice          = 0x0100,
+    .idVendor           = USB_VID,
+    .idProduct          = USB_PID,
+    .bcdDevice          = 0x0100,
 
-  .iManufacturer      = 0x01,
-  .iProduct           = 0x02,
-  .iSerialNumber      = 0x03,
+    .iManufacturer      = 0x01,
+    .iProduct           = 0x02,
+    .iSerialNumber      = 0x03,
 
-  .bNumConfigurations = 0x01
+    .bNumConfigurations = 0x01
 };
 
 // Invoked when received GET DEVICE DESCRIPTOR
 // Application return pointer to descriptor
-uint8_t const * tud_descriptor_device_cb(void)
-{
-  return (uint8_t const *) &desc_device;
+uint8_t const* tud_descriptor_device_cb(void) {
+  return (uint8_t const*) &desc_device;
 }
 
 //--------------------------------------------------------------------+
 // Configuration Descriptor
 //--------------------------------------------------------------------+
 
-enum
-{
+enum {
   ITF_NUM_CDC = 0,
   ITF_NUM_CDC_DATA,
   ITF_NUM_TOTAL
@@ -92,7 +89,7 @@ enum
   #define EPNUM_CDC_OUT     0x02
   #define EPNUM_CDC_IN      0x82
 
-#elif CFG_TUSB_MCU == OPT_MCU_SAMG  || CFG_TUSB_MCU ==  OPT_MCU_SAMX7X
+#elif CFG_TUSB_MCU == OPT_MCU_SAMG || CFG_TUSB_MCU == OPT_MCU_SAMX7X
   // SAMG & SAME70 don't support a same endpoint number with different direction IN and OUT
   //    e.g EP1 OUT & EP1 IN cannot exist together
   #define EPNUM_CDC_NOTIF   0x81
@@ -109,7 +106,7 @@ enum
   #define EPNUM_CDC_IN      0x81
 
 #elif CFG_TUSB_MCU == OPT_MCU_FT90X || CFG_TUSB_MCU == OPT_MCU_FT93X
-  // FT9XX doesn't support a same endpoint number with different direction IN and OUT
+// FT9XX doesn't support a same endpoint number with different direction IN and OUT
   //    e.g EP1 OUT & EP1 IN cannot exist together
   #define EPNUM_CDC_NOTIF   0x81
   #define EPNUM_CDC_OUT     0x02
@@ -125,21 +122,19 @@ enum
 #define CONFIG_TOTAL_LEN    (TUD_CONFIG_DESC_LEN + TUD_CDC_DESC_LEN)
 
 // full speed configuration
-uint8_t const desc_fs_configuration[] =
-{
-  // Config number, interface count, string index, total length, attribute, power in mA
-  TUD_CONFIG_DESCRIPTOR(1, ITF_NUM_TOTAL, 0, CONFIG_TOTAL_LEN, 0x00, 100),
+uint8_t const desc_fs_configuration[] = {
+    // Config number, interface count, string index, total length, attribute, power in mA
+    TUD_CONFIG_DESCRIPTOR(1, ITF_NUM_TOTAL, 0, CONFIG_TOTAL_LEN, 0x00, 100),
 
-  // Interface number, string index, EP notification address and size, EP data address (out, in) and size.
-  TUD_CDC_DESCRIPTOR(ITF_NUM_CDC, 4, EPNUM_CDC_NOTIF, 8, EPNUM_CDC_OUT, EPNUM_CDC_IN, 64),
+    // Interface number, string index, EP notification address and size, EP data address (out, in) and size.
+    TUD_CDC_DESCRIPTOR(ITF_NUM_CDC, 4, EPNUM_CDC_NOTIF, 8, EPNUM_CDC_OUT, EPNUM_CDC_IN, 64),
 };
 
 #if TUD_OPT_HIGH_SPEED
 // Per USB specs: high speed capable device must report device_qualifier and other_speed_configuration
 
 // high speed configuration
-uint8_t const desc_hs_configuration[] =
-{
+uint8_t const desc_hs_configuration[] = {
   // Config number, interface count, string index, total length, attribute, power in mA
   TUD_CONFIG_DESCRIPTOR(1, ITF_NUM_TOTAL, 0, CONFIG_TOTAL_LEN, 0x00, 100),
 
@@ -151,8 +146,7 @@ uint8_t const desc_hs_configuration[] =
 uint8_t desc_other_speed_config[CONFIG_TOTAL_LEN];
 
 // device qualifier is mostly similar to device descriptor since we don't change configuration based on speed
-tusb_desc_device_qualifier_t const desc_device_qualifier =
-{
+tusb_desc_device_qualifier_t const desc_device_qualifier = {
   .bLength            = sizeof(tusb_desc_device_qualifier_t),
   .bDescriptorType    = TUSB_DESC_DEVICE_QUALIFIER,
   .bcdUSB             = USB_BCD,
@@ -170,16 +164,14 @@ tusb_desc_device_qualifier_t const desc_device_qualifier =
 // Application return pointer to descriptor, whose contents must exist long enough for transfer to complete.
 // device_qualifier descriptor describes information about a high-speed capable device that would
 // change if the device were operating at the other speed. If not highspeed capable stall this request.
-uint8_t const* tud_descriptor_device_qualifier_cb(void)
-{
+uint8_t const* tud_descriptor_device_qualifier_cb(void) {
   return (uint8_t const*) &desc_device_qualifier;
 }
 
 // Invoked when received GET OTHER SEED CONFIGURATION DESCRIPTOR request
 // Application return pointer to descriptor, whose contents must exist long enough for transfer to complete
 // Configuration descriptor in the other speed e.g if high speed then this is for full speed and vice versa
-uint8_t const* tud_descriptor_other_speed_configuration_cb(uint8_t index)
-{
+uint8_t const* tud_descriptor_other_speed_configuration_cb(uint8_t index) {
   (void) index; // for multiple configurations
 
   // if link speed is high return fullspeed config, and vice versa
@@ -199,8 +191,7 @@ uint8_t const* tud_descriptor_other_speed_configuration_cb(uint8_t index)
 // Invoked when received GET CONFIGURATION DESCRIPTOR
 // Application return pointer to descriptor
 // Descriptor contents must exist long enough for transfer to complete
-uint8_t const * tud_descriptor_configuration_cb(uint8_t index)
-{
+uint8_t const* tud_descriptor_configuration_cb(uint8_t index) {
   (void) index; // for multiple configurations
 
 #if TUD_OPT_HIGH_SPEED
@@ -224,24 +215,23 @@ enum {
 };
 
 // array of pointer to string descriptors
-char const *string_desc_arr[] =
-{
-  (const char[]) { 0x09, 0x04 }, // 0: is supported language is English (0x0409)
-  "TinyUSB",                     // 1: Manufacturer
-  "TinyUSB Device",              // 2: Product
-  NULL,                          // 3: Serials will use unique ID if possible
-  "TinyUSB CDC",                 // 4: CDC Interface
+char const* string_desc_arr[] = {
+    (const char[]) {0x09, 0x04}, // 0: is supported language is English (0x0409)
+    "TinyUSB",                     // 1: Manufacturer
+    "TinyUSB Device",              // 2: Product
+    NULL,                          // 3: Serials will use unique ID if possible
+    "TinyUSB CDC",                 // 4: CDC Interface
 };
 
 static uint16_t _desc_str[32 + 1];
 
 // Invoked when received GET STRING DESCRIPTOR request
 // Application return pointer to descriptor, whose contents must exist long enough for transfer to complete
-uint16_t const *tud_descriptor_string_cb(uint8_t index, uint16_t langid) {
+uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid) {
   (void) langid;
   size_t chr_count;
 
-  switch ( index ) {
+  switch (index) {
     case STRID_LANGID:
       memcpy(&_desc_str[1], string_desc_arr[0], 2);
       chr_count = 1;
@@ -255,17 +245,17 @@ uint16_t const *tud_descriptor_string_cb(uint8_t index, uint16_t langid) {
       // Note: the 0xEE index string is a Microsoft OS 1.0 Descriptors.
       // https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-defined-usb-descriptors
 
-      if ( !(index < sizeof(string_desc_arr) / sizeof(string_desc_arr[0])) ) return NULL;
+      if (!(index < sizeof(string_desc_arr) / sizeof(string_desc_arr[0]))) return NULL;
 
-      const char *str = string_desc_arr[index];
+      const char* str = string_desc_arr[index];
 
       // Cap at max char
       chr_count = strlen(str);
       size_t const max_count = sizeof(_desc_str) / sizeof(_desc_str[0]) - 1; // -1 for string type
-      if ( chr_count > max_count ) chr_count = max_count;
+      if (chr_count > max_count) chr_count = max_count;
 
       // Convert ASCII string into UTF-16
-      for ( size_t i = 0; i < chr_count; i++ ) {
+      for (size_t i = 0; i < chr_count; i++) {
         _desc_str[1 + i] = str[i];
       }
       break;
diff --git a/examples/dual/host_info_to_device_cdc/CMakeLists.txt b/examples/dual/host_info_to_device_cdc/CMakeLists.txt
new file mode 100644
index 000000000..a6557c2d0
--- /dev/null
+++ b/examples/dual/host_info_to_device_cdc/CMakeLists.txt
@@ -0,0 +1,40 @@
+cmake_minimum_required(VERSION 3.17)
+
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/family_support.cmake)
+
+# gets PROJECT name for the example (e.g. <BOARD>-<DIR_NAME>)
+family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
+
+project(${PROJECT} C CXX ASM)
+
+# Checks this example is valid for the family and initializes the project
+family_initialize_project(${PROJECT} ${CMAKE_CURRENT_LIST_DIR})
+
+add_executable(${PROJECT})
+
+# Example source
+target_sources(${PROJECT} PUBLIC
+  ${CMAKE_CURRENT_SOURCE_DIR}/src/main.c
+  ${CMAKE_CURRENT_SOURCE_DIR}/src/usb_descriptors.c
+  )
+
+# Example include
+target_include_directories(${PROJECT} PUBLIC
+  ${CMAKE_CURRENT_SOURCE_DIR}/src
+  )
+
+# Configure compilation flags and libraries for the example without RTOS.
+# See the corresponding function in hw/bsp/FAMILY/family.cmake for details.
+family_configure_dual_usb_example(${PROJECT} noos)
+
+# due to warnings from Pico-PIO-USB
+target_compile_options(${PROJECT} PUBLIC
+  -Wno-error=shadow
+  -Wno-error=cast-align
+  -Wno-error=cast-qual
+  -Wno-error=redundant-decls
+  -Wno-error=sign-conversion
+  -Wno-error=conversion
+  -Wno-error=sign-compare
+  -Wno-error=unused-function
+  )
diff --git a/examples/dual/host_info_to_device_cdc/Makefile b/examples/dual/host_info_to_device_cdc/Makefile
new file mode 100644
index 000000000..0ede79c17
--- /dev/null
+++ b/examples/dual/host_info_to_device_cdc/Makefile
@@ -0,0 +1,17 @@
+include ../../build_system/make/make.mk
+
+INC += \
+	src \
+	$(TOP)/hw \
+
+# Example source
+EXAMPLE_SOURCE += $(wildcard src/*.c)
+SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
+
+CFLAGS += -Wno-error=cast-align -Wno-error=null-dereference
+
+SRC_C += \
+	src/host/hub.c \
+	src/host/usbh.c
+
+include ../../build_system/make/rules.mk
diff --git a/examples/dual/host_info_to_device_cdc/only.txt b/examples/dual/host_info_to_device_cdc/only.txt
new file mode 100644
index 000000000..cfc87eb4e
--- /dev/null
+++ b/examples/dual/host_info_to_device_cdc/only.txt
@@ -0,0 +1,6 @@
+board:mimxrt1060_evk
+board:mimxrt1064_evk
+board:mcb1800
+mcu:RP2040
+mcu:ra6m5
+mcu:MAX3421
diff --git a/examples/dual/host_info_to_device_cdc/src/main.c b/examples/dual/host_info_to_device_cdc/src/main.c
new file mode 100644
index 000000000..5be531098
--- /dev/null
+++ b/examples/dual/host_info_to_device_cdc/src/main.c
@@ -0,0 +1,285 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Ha Thach (tinyusb.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+
+/* Host example will get device descriptors of attached devices and print it out via device cdc as follows:
+ *    Device 1: ID 046d:c52f
+      Device Descriptor:
+        bLength             18
+        bDescriptorType     1
+        bcdUSB              0200
+        bDeviceClass        0
+        bDeviceSubClass     0
+        bDeviceProtocol     0
+        bMaxPacketSize0     8
+        idVendor            0x046d
+        idProduct           0xc52f
+        bcdDevice           2200
+        iManufacturer       1     Logitech
+        iProduct            2     USB Receiver
+        iSerialNumber       0
+        bNumConfigurations  1
+ *
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "bsp/board_api.h"
+#include "tusb.h"
+
+//--------------------------------------------------------------------+
+// MACRO CONSTANT TYPEDEF PROTYPES
+//--------------------------------------------------------------------+
+// Language ID: English
+#define LANGUAGE_ID 0x0409
+
+/* Blink pattern
+ * - 250 ms  : device not mounted
+ * - 1000 ms : device mounted
+ * - 2500 ms : device is suspended
+ */
+enum {
+  BLINK_NOT_MOUNTED = 250,
+  BLINK_MOUNTED = 1000,
+  BLINK_SUSPENDED = 2500,
+};
+
+static uint32_t blink_interval_ms = BLINK_NOT_MOUNTED;
+
+static bool is_print[CFG_TUH_DEVICE_MAX+1] = { 0 };
+
+static void print_utf16(uint16_t *temp_buf, size_t buf_len);
+void led_blinking_task(void);
+void cdc_task(void);
+
+/*------------- MAIN -------------*/
+int main(void) {
+  board_init();
+
+  printf("TinyUSB Host Information -> Device CDC Example\r\n");
+
+  // init device and host stack on configured roothub port
+  tud_init(BOARD_TUD_RHPORT);
+  tuh_init(BOARD_TUH_RHPORT);
+
+  if (board_init_after_tusb) {
+    board_init_after_tusb();
+  }
+
+  while (1) {
+    tud_task(); // tinyusb device task
+    tuh_task(); // tinyusb host task
+    cdc_task();
+    led_blinking_task();
+  }
+
+  return 0;
+}
+
+//--------------------------------------------------------------------+
+// Device CDC
+//--------------------------------------------------------------------+
+
+// Invoked when device is mounted
+void tud_mount_cb(void) {
+  blink_interval_ms = BLINK_MOUNTED;
+}
+
+// Invoked when device is unmounted
+void tud_umount_cb(void) {
+  blink_interval_ms = BLINK_NOT_MOUNTED;
+}
+
+// Invoked when usb bus is suspended
+// remote_wakeup_en : if host allow us  to perform remote wakeup
+// Within 7ms, device must draw an average of current less than 2.5 mA from bus
+void tud_suspend_cb(bool remote_wakeup_en) {
+  (void) remote_wakeup_en;
+  blink_interval_ms = BLINK_SUSPENDED;
+}
+
+// Invoked when usb bus is resumed
+void tud_resume_cb(void) {
+  blink_interval_ms = tud_mounted() ? BLINK_MOUNTED : BLINK_NOT_MOUNTED;
+}
+
+#if 1
+#define cdc_printf(...)                          \
+  do {                                           \
+    char _tempbuf[256];                          \
+    int count = sprintf(_tempbuf, __VA_ARGS__);  \
+    tud_cdc_write(_tempbuf, (uint32_t) count);   \
+    tud_cdc_write_flush();                       \
+    tud_task();                                  \
+  } while(0)
+#endif
+
+//#define cdc_printf printf
+
+void print_device_info(uint8_t daddr) {
+  tusb_desc_device_t desc_device;
+  uint8_t xfer_result = tuh_descriptor_get_device_sync(daddr, &desc_device, 18);
+  if (XFER_RESULT_SUCCESS != xfer_result) {
+    tud_cdc_write_str("Failed to get device descriptor\r\n");
+    return;
+  }
+
+  cdc_printf("Device %u: ID %04x:%04x\r\n", daddr, desc_device.idVendor, desc_device.idProduct);
+  cdc_printf("Device Descriptor:\r\n");
+  cdc_printf("  bLength             %u\r\n"     , desc_device.bLength);
+  cdc_printf("  bDescriptorType     %u\r\n"     , desc_device.bDescriptorType);
+  cdc_printf("  bcdUSB              %04x\r\n"   , desc_device.bcdUSB);
+  cdc_printf("  bDeviceClass        %u\r\n"     , desc_device.bDeviceClass);
+  cdc_printf("  bDeviceSubClass     %u\r\n"     , desc_device.bDeviceSubClass);
+  cdc_printf("  bDeviceProtocol     %u\r\n"     , desc_device.bDeviceProtocol);
+  cdc_printf("  bMaxPacketSize0     %u\r\n"     , desc_device.bMaxPacketSize0);
+  cdc_printf("  idVendor            0x%04x\r\n" , desc_device.idVendor);
+  cdc_printf("  idProduct           0x%04x\r\n" , desc_device.idProduct);
+  cdc_printf("  bcdDevice           %04x\r\n"   , desc_device.bcdDevice);
+
+  // Get String descriptor using Sync API
+  uint16_t buf[128];
+
+  cdc_printf("  iManufacturer       %u     "     , desc_device.iManufacturer);
+  xfer_result = tuh_descriptor_get_manufacturer_string_sync(daddr, LANGUAGE_ID, buf, sizeof(buf));
+  if (XFER_RESULT_SUCCESS == xfer_result ) {
+    print_utf16(buf, TU_ARRAY_SIZE(buf));
+  }
+  tud_cdc_write_str("\r\n");
+
+  cdc_printf("  iProduct            %u     "     , desc_device.iProduct);
+  xfer_result = tuh_descriptor_get_product_string_sync(daddr, LANGUAGE_ID, buf, sizeof(buf));
+  if (XFER_RESULT_SUCCESS == xfer_result) {
+    print_utf16(buf, TU_ARRAY_SIZE(buf));
+  }
+  tud_cdc_write_str("\r\n");
+
+  cdc_printf("  iSerialNumber       %u     "     , desc_device.iSerialNumber);
+  xfer_result = tuh_descriptor_get_serial_string_sync(daddr, LANGUAGE_ID, buf, sizeof(buf));
+  if (XFER_RESULT_SUCCESS == xfer_result) {
+    print_utf16(buf, TU_ARRAY_SIZE(buf));
+  }
+  tud_cdc_write_str("\r\n");
+
+  cdc_printf("  bNumConfigurations  %u\r\n"     , desc_device.bNumConfigurations);
+}
+
+void cdc_task(void) {
+  if (tud_cdc_connected()) {
+    for (uint8_t daddr = 1; daddr <= CFG_TUH_DEVICE_MAX; daddr++) {
+      if (tuh_mounted(daddr)) {
+        if (is_print[daddr]) {
+          is_print[daddr] = false;
+          print_device_info(daddr);
+          tud_cdc_write_flush();
+        }
+      }
+    }
+  }
+}
+
+//--------------------------------------------------------------------+
+// Host Get device information
+//--------------------------------------------------------------------+
+void tuh_mount_cb(uint8_t daddr) {
+  printf("mounted device %u\r\n", daddr);
+  is_print[daddr] = true;
+}
+
+void tuh_umount_cb(uint8_t daddr) {
+  printf("unmounted device %u\r\n", daddr);
+  is_print[daddr] = false;
+}
+
+//--------------------------------------------------------------------+
+// Blinking Task
+//--------------------------------------------------------------------+
+void led_blinking_task(void) {
+  static uint32_t start_ms = 0;
+  static bool led_state = false;
+
+  // Blink every interval ms
+  if (board_millis() - start_ms < blink_interval_ms) return; // not enough time
+  start_ms += blink_interval_ms;
+
+  board_led_write(led_state);
+  led_state = 1 - led_state; // toggle
+}
+
+//--------------------------------------------------------------------+
+// String Descriptor Helper
+//--------------------------------------------------------------------+
+
+static void _convert_utf16le_to_utf8(const uint16_t *utf16, size_t utf16_len, uint8_t *utf8, size_t utf8_len) {
+  // TODO: Check for runover.
+  (void)utf8_len;
+  // Get the UTF-16 length out of the data itself.
+
+  for (size_t i = 0; i < utf16_len; i++) {
+    uint16_t chr = utf16[i];
+    if (chr < 0x80) {
+      *utf8++ = chr & 0xffu;
+    } else if (chr < 0x800) {
+      *utf8++ = (uint8_t)(0xC0 | (chr >> 6 & 0x1F));
+      *utf8++ = (uint8_t)(0x80 | (chr >> 0 & 0x3F));
+    } else {
+      // TODO: Verify surrogate.
+      *utf8++ = (uint8_t)(0xE0 | (chr >> 12 & 0x0F));
+      *utf8++ = (uint8_t)(0x80 | (chr >> 6 & 0x3F));
+      *utf8++ = (uint8_t)(0x80 | (chr >> 0 & 0x3F));
+    }
+    // TODO: Handle UTF-16 code points that take two entries.
+  }
+}
+
+// Count how many bytes a utf-16-le encoded string will take in utf-8.
+static int _count_utf8_bytes(const uint16_t *buf, size_t len) {
+  size_t total_bytes = 0;
+  for (size_t i = 0; i < len; i++) {
+    uint16_t chr = buf[i];
+    if (chr < 0x80) {
+      total_bytes += 1;
+    } else if (chr < 0x800) {
+      total_bytes += 2;
+    } else {
+      total_bytes += 3;
+    }
+    // TODO: Handle UTF-16 code points that take two entries.
+  }
+  return (int) total_bytes;
+}
+
+static void print_utf16(uint16_t *temp_buf, size_t buf_len) {
+  if ((temp_buf[0] & 0xff) == 0) return;  // empty
+  size_t utf16_len = ((temp_buf[0] & 0xff) - 2) / sizeof(uint16_t);
+  size_t utf8_len = (size_t) _count_utf8_bytes(temp_buf + 1, utf16_len);
+  _convert_utf16le_to_utf8(temp_buf + 1, utf16_len, (uint8_t *) temp_buf, sizeof(uint16_t) * buf_len);
+  ((uint8_t*) temp_buf)[utf8_len] = '\0';
+
+  tud_cdc_write(temp_buf, utf8_len);
+  tud_cdc_write_flush();
+  tud_task();
+}
diff --git a/examples/dual/host_info_to_device_cdc/src/tusb_config.h b/examples/dual/host_info_to_device_cdc/src/tusb_config.h
new file mode 100644
index 000000000..bb47fbf4a
--- /dev/null
+++ b/examples/dual/host_info_to_device_cdc/src/tusb_config.h
@@ -0,0 +1,143 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Ha Thach (tinyusb.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+
+#ifndef TUSB_CONFIG_H_
+#define TUSB_CONFIG_H_
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+//--------------------------------------------------------------------+
+// Board Specific Configuration
+//--------------------------------------------------------------------+
+
+// RHPort number used for device can be defined by board.mk, default to port 0
+#ifndef BOARD_TUD_RHPORT
+#define BOARD_TUD_RHPORT      0
+#endif
+
+// RHPort max operational speed can defined by board.mk
+#ifndef BOARD_TUD_MAX_SPEED
+#define BOARD_TUD_MAX_SPEED   OPT_MODE_DEFAULT_SPEED
+#endif
+
+// RHPort number used for host can be defined by board.mk, default to port 1
+#ifndef BOARD_TUH_RHPORT
+#define BOARD_TUH_RHPORT      1
+#endif
+
+// RHPort max operational speed can defined by board.mk
+#ifndef BOARD_TUH_MAX_SPEED
+#define BOARD_TUH_MAX_SPEED   OPT_MODE_DEFAULT_SPEED
+#endif
+
+//--------------------------------------------------------------------
+// COMMON CONFIGURATION
+//--------------------------------------------------------------------
+
+// defined by compiler flags for flexibility
+#ifndef CFG_TUSB_MCU
+#error CFG_TUSB_MCU must be defined
+#endif
+
+#ifndef CFG_TUSB_OS
+#define CFG_TUSB_OS           OPT_OS_NONE
+#endif
+
+#ifndef CFG_TUSB_DEBUG
+#define CFG_TUSB_DEBUG        0
+#endif
+
+// Enable Device stack, Default is max speed that hardware controller could support with on-chip PHY
+#define CFG_TUD_ENABLED       1
+#define CFG_TUD_MAX_SPEED     BOARD_TUD_MAX_SPEED
+
+// Enable Host stack, Default is max speed that hardware controller could support with on-chip PHY
+#define CFG_TUH_ENABLED       1
+#define CFG_TUH_MAX_SPEED     BOARD_TUH_MAX_SPEED
+
+#if CFG_TUSB_MCU == OPT_MCU_RP2040
+// Use pico-pio-usb as host controller for raspberry rp2040
+#define CFG_TUH_RPI_PIO_USB   1
+#endif
+
+/* USB DMA on some MCUs can only access a specific SRAM region with restriction on alignment.
+ * Tinyusb use follows macros to declare transferring memory so that they can be put
+ * into those specific section.
+ * e.g
+ * - CFG_TUSB_MEM SECTION : __attribute__ (( section(".usb_ram") ))
+ * - CFG_TUSB_MEM_ALIGN   : __attribute__ ((aligned(4)))
+ */
+#ifndef CFG_TUD_MEM_SECTION
+#define CFG_TUD_MEM_SECTION
+#endif
+
+#ifndef CFG_TUD_MEM_ALIGN
+#define CFG_TUD_MEM_ALIGN        __attribute__ ((aligned(4)))
+#endif
+
+//--------------------------------------------------------------------
+// DEVICE CONFIGURATION
+//--------------------------------------------------------------------
+
+#ifndef CFG_TUD_ENDPOINT0_SIZE
+#define CFG_TUD_ENDPOINT0_SIZE    64
+#endif
+
+//------------- CLASS -------------//
+#define CFG_TUD_CDC              1
+
+// CDC FIFO size of TX and RX
+#define CFG_TUD_CDC_RX_BUFSIZE   (TUD_OPT_HIGH_SPEED ? 512 : 64)
+#define CFG_TUD_CDC_TX_BUFSIZE   (TUD_OPT_HIGH_SPEED ? 512 : 64)
+
+// CDC Endpoint transfer buffer size, more is faster
+#define CFG_TUD_CDC_EP_BUFSIZE   (TUD_OPT_HIGH_SPEED ? 512 : 64)
+
+//--------------------------------------------------------------------
+// HOST CONFIGURATION
+//--------------------------------------------------------------------
+
+// Size of buffer to hold descriptors and other data used for enumeration
+#define CFG_TUH_ENUMERATION_BUFSIZE 256
+
+#ifndef CFG_TUH_MEM_SECTION
+#define CFG_TUH_MEM_SECTION
+#endif
+
+#ifndef CFG_TUH_MEM_ALIGN
+#define CFG_TUH_MEM_ALIGN           __attribute__ ((aligned(4)))
+#endif
+
+#define CFG_TUH_HUB                 1
+// max device support (excluding hub device)
+#define CFG_TUH_DEVICE_MAX          (CFG_TUH_HUB ? 4 : 1) // hub typically has 4 ports
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif
diff --git a/examples/dual/host_info_to_device_cdc/src/usb_descriptors.c b/examples/dual/host_info_to_device_cdc/src/usb_descriptors.c
new file mode 100644
index 000000000..9d57737fb
--- /dev/null
+++ b/examples/dual/host_info_to_device_cdc/src/usb_descriptors.c
@@ -0,0 +1,268 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Ha Thach (tinyusb.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+
+#include "bsp/board_api.h"
+#include "tusb.h"
+
+/* A combination of interfaces must have a unique product id, since PC will save device driver after the first plug.
+ * Same VID/PID with different interface e.g MSC (first), then CDC (later) will possibly cause system error on PC.
+ *
+ * Auto ProductID layout's Bitmap:
+ *   [MSB]         HID | MSC | CDC          [LSB]
+ */
+#define _PID_MAP(itf, n)  ( (CFG_TUD_##itf) << (n) )
+#define USB_PID           (0x4000 | _PID_MAP(CDC, 0) | _PID_MAP(MSC, 1) | _PID_MAP(HID, 2) | \
+                           _PID_MAP(MIDI, 3) | _PID_MAP(VENDOR, 4) )
+
+#define USB_VID   0xCafe
+#define USB_BCD   0x0200
+
+//--------------------------------------------------------------------+
+// Device Descriptors
+//--------------------------------------------------------------------+
+tusb_desc_device_t const desc_device = {
+    .bLength            = sizeof(tusb_desc_device_t),
+    .bDescriptorType    = TUSB_DESC_DEVICE,
+    .bcdUSB             = USB_BCD,
+
+    // Use Interface Association Descriptor (IAD) for CDC
+    // As required by USB Specs IAD's subclass must be common class (2) and protocol must be IAD (1)
+    .bDeviceClass       = TUSB_CLASS_MISC,
+    .bDeviceSubClass    = MISC_SUBCLASS_COMMON,
+    .bDeviceProtocol    = MISC_PROTOCOL_IAD,
+
+    .bMaxPacketSize0    = CFG_TUD_ENDPOINT0_SIZE,
+
+    .idVendor           = USB_VID,
+    .idProduct          = USB_PID,
+    .bcdDevice          = 0x0100,
+
+    .iManufacturer      = 0x01,
+    .iProduct           = 0x02,
+    .iSerialNumber      = 0x03,
+
+    .bNumConfigurations = 0x01
+};
+
+// Invoked when received GET DEVICE DESCRIPTOR
+// Application return pointer to descriptor
+uint8_t const* tud_descriptor_device_cb(void) {
+  return (uint8_t const*) &desc_device;
+}
+
+//--------------------------------------------------------------------+
+// Configuration Descriptor
+//--------------------------------------------------------------------+
+
+enum {
+  ITF_NUM_CDC = 0,
+  ITF_NUM_CDC_DATA,
+  ITF_NUM_TOTAL
+};
+
+#if CFG_TUSB_MCU == OPT_MCU_LPC175X_6X || CFG_TUSB_MCU == OPT_MCU_LPC177X_8X || CFG_TUSB_MCU == OPT_MCU_LPC40XX
+  // LPC 17xx and 40xx endpoint type (bulk/interrupt/iso) are fixed by its number
+  // 0 control, 1 In, 2 Bulk, 3 Iso, 4 In, 5 Bulk etc ...
+  #define EPNUM_CDC_NOTIF   0x81
+  #define EPNUM_CDC_OUT     0x02
+  #define EPNUM_CDC_IN      0x82
+
+#elif CFG_TUSB_MCU == OPT_MCU_SAMG || CFG_TUSB_MCU == OPT_MCU_SAMX7X
+  // SAMG & SAME70 don't support a same endpoint number with different direction IN and OUT
+  //    e.g EP1 OUT & EP1 IN cannot exist together
+  #define EPNUM_CDC_NOTIF   0x81
+  #define EPNUM_CDC_OUT     0x02
+  #define EPNUM_CDC_IN      0x83
+
+#elif CFG_TUSB_MCU == OPT_MCU_CXD56
+  // CXD56 doesn't support a same endpoint number with different direction IN and OUT
+  //    e.g EP1 OUT & EP1 IN cannot exist together
+  // CXD56 USB driver has fixed endpoint type (bulk/interrupt/iso) and direction (IN/OUT) by its number
+  // 0 control (IN/OUT), 1 Bulk (IN), 2 Bulk (OUT), 3 In (IN), 4 Bulk (IN), 5 Bulk (OUT), 6 In (IN)
+  #define EPNUM_CDC_NOTIF   0x83
+  #define EPNUM_CDC_OUT     0x02
+  #define EPNUM_CDC_IN      0x81
+
+#elif CFG_TUSB_MCU == OPT_MCU_FT90X || CFG_TUSB_MCU == OPT_MCU_FT93X
+// FT9XX doesn't support a same endpoint number with different direction IN and OUT
+  //    e.g EP1 OUT & EP1 IN cannot exist together
+  #define EPNUM_CDC_NOTIF   0x81
+  #define EPNUM_CDC_OUT     0x02
+  #define EPNUM_CDC_IN      0x83
+
+#else
+  #define EPNUM_CDC_NOTIF   0x81
+  #define EPNUM_CDC_OUT     0x02
+  #define EPNUM_CDC_IN      0x82
+
+#endif
+
+#define CONFIG_TOTAL_LEN    (TUD_CONFIG_DESC_LEN + TUD_CDC_DESC_LEN)
+
+// full speed configuration
+uint8_t const desc_fs_configuration[] = {
+    // Config number, interface count, string index, total length, attribute, power in mA
+    TUD_CONFIG_DESCRIPTOR(1, ITF_NUM_TOTAL, 0, CONFIG_TOTAL_LEN, 0x00, 100),
+
+    // Interface number, string index, EP notification address and size, EP data address (out, in) and size.
+    TUD_CDC_DESCRIPTOR(ITF_NUM_CDC, 4, EPNUM_CDC_NOTIF, 8, EPNUM_CDC_OUT, EPNUM_CDC_IN, 64),
+};
+
+#if TUD_OPT_HIGH_SPEED
+// Per USB specs: high speed capable device must report device_qualifier and other_speed_configuration
+
+// high speed configuration
+uint8_t const desc_hs_configuration[] = {
+  // Config number, interface count, string index, total length, attribute, power in mA
+  TUD_CONFIG_DESCRIPTOR(1, ITF_NUM_TOTAL, 0, CONFIG_TOTAL_LEN, 0x00, 100),
+
+  // Interface number, string index, EP notification address and size, EP data address (out, in) and size.
+  TUD_CDC_DESCRIPTOR(ITF_NUM_CDC, 4, EPNUM_CDC_NOTIF, 8, EPNUM_CDC_OUT, EPNUM_CDC_IN, 512),
+};
+
+// other speed configuration
+uint8_t desc_other_speed_config[CONFIG_TOTAL_LEN];
+
+// device qualifier is mostly similar to device descriptor since we don't change configuration based on speed
+tusb_desc_device_qualifier_t const desc_device_qualifier = {
+  .bLength            = sizeof(tusb_desc_device_qualifier_t),
+  .bDescriptorType    = TUSB_DESC_DEVICE_QUALIFIER,
+  .bcdUSB             = USB_BCD,
+
+  .bDeviceClass       = TUSB_CLASS_MISC,
+  .bDeviceSubClass    = MISC_SUBCLASS_COMMON,
+  .bDeviceProtocol    = MISC_PROTOCOL_IAD,
+
+  .bMaxPacketSize0    = CFG_TUD_ENDPOINT0_SIZE,
+  .bNumConfigurations = 0x01,
+  .bReserved          = 0x00
+};
+
+// Invoked when received GET DEVICE QUALIFIER DESCRIPTOR request
+// Application return pointer to descriptor, whose contents must exist long enough for transfer to complete.
+// device_qualifier descriptor describes information about a high-speed capable device that would
+// change if the device were operating at the other speed. If not highspeed capable stall this request.
+uint8_t const* tud_descriptor_device_qualifier_cb(void) {
+  return (uint8_t const*) &desc_device_qualifier;
+}
+
+// Invoked when received GET OTHER SEED CONFIGURATION DESCRIPTOR request
+// Application return pointer to descriptor, whose contents must exist long enough for transfer to complete
+// Configuration descriptor in the other speed e.g if high speed then this is for full speed and vice versa
+uint8_t const* tud_descriptor_other_speed_configuration_cb(uint8_t index) {
+  (void) index; // for multiple configurations
+
+  // if link speed is high return fullspeed config, and vice versa
+  // Note: the descriptor type is OHER_SPEED_CONFIG instead of CONFIG
+  memcpy(desc_other_speed_config,
+         (tud_speed_get() == TUSB_SPEED_HIGH) ? desc_fs_configuration : desc_hs_configuration,
+         CONFIG_TOTAL_LEN);
+
+  desc_other_speed_config[1] = TUSB_DESC_OTHER_SPEED_CONFIG;
+
+  return desc_other_speed_config;
+}
+
+#endif // highspeed
+
+
+// Invoked when received GET CONFIGURATION DESCRIPTOR
+// Application return pointer to descriptor
+// Descriptor contents must exist long enough for transfer to complete
+uint8_t const* tud_descriptor_configuration_cb(uint8_t index) {
+  (void) index; // for multiple configurations
+
+#if TUD_OPT_HIGH_SPEED
+  // Although we are highspeed, host may be fullspeed.
+  return (tud_speed_get() == TUSB_SPEED_HIGH) ?  desc_hs_configuration : desc_fs_configuration;
+#else
+  return desc_fs_configuration;
+#endif
+}
+
+//--------------------------------------------------------------------+
+// String Descriptors
+//--------------------------------------------------------------------+
+
+// String Descriptor Index
+enum {
+  STRID_LANGID = 0,
+  STRID_MANUFACTURER,
+  STRID_PRODUCT,
+  STRID_SERIAL,
+};
+
+// array of pointer to string descriptors
+char const* string_desc_arr[] = {
+    (const char[]) {0x09, 0x04}, // 0: is supported language is English (0x0409)
+    "TinyUSB",                     // 1: Manufacturer
+    "TinyUSB Device",              // 2: Product
+    NULL,                          // 3: Serials will use unique ID if possible
+    "TinyUSB CDC",                 // 4: CDC Interface
+};
+
+static uint16_t _desc_str[32 + 1];
+
+// Invoked when received GET STRING DESCRIPTOR request
+// Application return pointer to descriptor, whose contents must exist long enough for transfer to complete
+uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid) {
+  (void) langid;
+  size_t chr_count;
+
+  switch (index) {
+    case STRID_LANGID:
+      memcpy(&_desc_str[1], string_desc_arr[0], 2);
+      chr_count = 1;
+      break;
+
+    case STRID_SERIAL:
+      chr_count = board_usb_get_serial(_desc_str + 1, 32);
+      break;
+
+    default:
+      // Note: the 0xEE index string is a Microsoft OS 1.0 Descriptors.
+      // https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-defined-usb-descriptors
+
+      if (!(index < sizeof(string_desc_arr) / sizeof(string_desc_arr[0]))) return NULL;
+
+      const char* str = string_desc_arr[index];
+
+      // Cap at max char
+      chr_count = strlen(str);
+      size_t const max_count = sizeof(_desc_str) / sizeof(_desc_str[0]) - 1; // -1 for string type
+      if (chr_count > max_count) chr_count = max_count;
+
+      // Convert ASCII string into UTF-16
+      for (size_t i = 0; i < chr_count; i++) {
+        _desc_str[1 + i] = str[i];
+      }
+      break;
+  }
+
+  // first byte is length (including header), second byte is string type
+  _desc_str[0] = (uint16_t) ((TUSB_DESC_STRING << 8) | (2 * chr_count + 2));
+
+  return _desc_str;
+}
diff --git a/examples/host/CMakeLists.txt b/examples/host/CMakeLists.txt
index e6a2ece14..793f6ab08 100644
--- a/examples/host/CMakeLists.txt
+++ b/examples/host/CMakeLists.txt
@@ -9,5 +9,6 @@ family_initialize_project(tinyusb_host_examples ${CMAKE_CURRENT_LIST_DIR})
 family_add_subdirectory(bare_api)
 family_add_subdirectory(cdc_msc_hid)
 family_add_subdirectory(cdc_msc_hid_freertos)
+family_add_subdirectory(device_info)
 family_add_subdirectory(hid_controller)
 family_add_subdirectory(msc_file_explorer)
diff --git a/examples/host/bare_api/src/main.c b/examples/host/bare_api/src/main.c
index 14725996d..ae574c078 100644
--- a/examples/host/bare_api/src/main.c
+++ b/examples/host/bare_api/src/main.c
@@ -23,10 +23,6 @@
  *
  */
 
-/* This example current worked and tested with following controller
- * - Sony DualShock 4 [CUH-ZCT2x] VID = 0x054c, PID = 0x09cc
- */
-
 
 #include <stdlib.h>
 #include <stdio.h>
@@ -34,6 +30,7 @@
 
 #include "bsp/board_api.h"
 #include "tusb.h"
+#include "class/hid/hid.h"
 
 // English
 #define LANGUAGE_ID 0x0409
@@ -420,5 +417,5 @@ static void print_utf16(uint16_t *temp_buf, size_t buf_len) {
     _convert_utf16le_to_utf8(temp_buf + 1, utf16_len, (uint8_t *) temp_buf, sizeof(uint16_t) * buf_len);
     ((uint8_t*) temp_buf)[utf8_len] = '\0';
 
-    printf((char*)temp_buf);
+    printf("%s", (char*)temp_buf);
 }
diff --git a/examples/host/bare_api/src/tusb_config.h b/examples/host/bare_api/src/tusb_config.h
index 432446e94..fab233be0 100644
--- a/examples/host/bare_api/src/tusb_config.h
+++ b/examples/host/bare_api/src/tusb_config.h
@@ -23,8 +23,8 @@
  *
  */
 
-#ifndef _TUSB_CONFIG_H_
-#define _TUSB_CONFIG_H_
+#ifndef TUSB_CONFIG_H_
+#define TUSB_CONFIG_H_
 
 #ifdef __cplusplus
  extern "C" {
@@ -118,4 +118,4 @@
  }
 #endif
 
-#endif /* _TUSB_CONFIG_H_ */
+#endif
diff --git a/examples/host/cdc_msc_hid/src/cdc_app.c b/examples/host/cdc_msc_hid/src/cdc_app.c
index e275e7943..4a13f8b27 100644
--- a/examples/host/cdc_msc_hid/src/cdc_app.c
+++ b/examples/host/cdc_msc_hid/src/cdc_app.c
@@ -72,7 +72,7 @@ void tuh_cdc_rx_cb(uint8_t idx) {
   uint32_t count = tuh_cdc_read(idx, buf, bufsize);
   buf[count] = 0;
 
-  printf((char*) buf);
+  printf("%s", (char*) buf);
 }
 
 // Invoked when a device with CDC interface is mounted
@@ -89,7 +89,7 @@ void tuh_cdc_mount_cb(uint8_t idx) {
   // while eneumerating new cdc device
   cdc_line_coding_t line_coding = {0};
   if (tuh_cdc_get_local_line_coding(idx, &line_coding)) {
-    printf("  Baudrate: %lu, Stop Bits : %u\r\n", line_coding.bit_rate, line_coding.stop_bits);
+    printf("  Baudrate: %" PRIu32 ", Stop Bits : %u\r\n", line_coding.bit_rate, line_coding.stop_bits);
     printf("  Parity  : %u, Data Width: %u\r\n", line_coding.parity, line_coding.data_bits);
   }
 #else
diff --git a/examples/host/cdc_msc_hid/src/hid_app.c b/examples/host/cdc_msc_hid/src/hid_app.c
index f0d42a08f..6bb3a2072 100644
--- a/examples/host/cdc_msc_hid/src/hid_app.c
+++ b/examples/host/cdc_msc_hid/src/hid_app.c
@@ -235,6 +235,7 @@ static void process_mouse_report(hid_mouse_report_t const * report)
 static void process_generic_report(uint8_t dev_addr, uint8_t instance, uint8_t const* report, uint16_t len)
 {
   (void) dev_addr;
+  (void) len;
 
   uint8_t const rpt_count = hid_info[instance].report_count;
   tuh_hid_report_info_t* rpt_info_arr = hid_info[instance].report_info;
diff --git a/examples/host/cdc_msc_hid/src/msc_app.c b/examples/host/cdc_msc_hid/src/msc_app.c
index e9c9676b8..1d7e18e6e 100644
--- a/examples/host/cdc_msc_hid/src/msc_app.c
+++ b/examples/host/cdc_msc_hid/src/msc_app.c
@@ -48,8 +48,8 @@ bool inquiry_complete_cb(uint8_t dev_addr, tuh_msc_complete_data_t const * cb_da
   uint32_t const block_count = tuh_msc_get_block_count(dev_addr, cbw->lun);
   uint32_t const block_size = tuh_msc_get_block_size(dev_addr, cbw->lun);
 
-  printf("Disk Size: %lu MB\r\n", block_count / ((1024*1024)/block_size));
-  printf("Block Count = %lu, Block Size: %lu\r\n", block_count, block_size);
+  printf("Disk Size: %" PRIu32 " MB\r\n", block_count / ((1024*1024)/block_size));
+  printf("Block Count = %" PRIu32 ", Block Size: %" PRIu32 "\r\n", block_count, block_size);
 
   return true;
 }
diff --git a/examples/host/cdc_msc_hid_freertos/Makefile b/examples/host/cdc_msc_hid_freertos/Makefile
index 5351a6248..bf4725f47 100644
--- a/examples/host/cdc_msc_hid_freertos/Makefile
+++ b/examples/host/cdc_msc_hid_freertos/Makefile
@@ -1,7 +1,7 @@
 include ../../build_system/make/make.mk
 
 FREERTOS_SRC = lib/FreeRTOS-Kernel
-FREERTOS_PORTABLE_PATH= $(FREERTOS_SRC)/portable/$(if $(USE_IAR),IAR,GCC)
+FREERTOS_PORTABLE_PATH= $(FREERTOS_SRC)/portable/$(if $(findstring iar,$(TOOLCHAIN)),IAR,GCC)
 
 INC += \
 	src \
diff --git a/examples/host/cdc_msc_hid_freertos/only.txt b/examples/host/cdc_msc_hid_freertos/only.txt
index 81d993ffa..1e0e60075 100644
--- a/examples/host/cdc_msc_hid_freertos/only.txt
+++ b/examples/host/cdc_msc_hid_freertos/only.txt
@@ -8,5 +8,4 @@ mcu:MIMXRT10XX
 mcu:MIMXRT11XX
 mcu:MSP432E4
 mcu:RX65X
-mcu:RAXXX
 mcu:MAX3421
diff --git a/examples/host/cdc_msc_hid_freertos/src/cdc_app.c b/examples/host/cdc_msc_hid_freertos/src/cdc_app.c
index 6ff513be1..f3495ab28 100644
--- a/examples/host/cdc_msc_hid_freertos/src/cdc_app.c
+++ b/examples/host/cdc_msc_hid_freertos/src/cdc_app.c
@@ -27,7 +27,7 @@
 #include "tusb.h"
 #include "bsp/board_api.h"
 
-#if TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
+#if TUP_MCU_ESPRESSIF
 // ESP-IDF need "freertos/" prefix in include path.
 // CFG_TUSB_OS_INC_PATH should be defined accordingly.
   #include "freertos/FreeRTOS.h"
@@ -117,7 +117,7 @@ void tuh_cdc_rx_cb(uint8_t idx) {
   uint32_t count = tuh_cdc_read(idx, buf, bufsize);
   buf[count] = 0;
 
-  printf((char *) buf);
+  printf("%s", (char *) buf);
 }
 
 void tuh_cdc_mount_cb(uint8_t idx) {
@@ -131,7 +131,7 @@ void tuh_cdc_mount_cb(uint8_t idx) {
   // otherwise you need to call tuh_cdc_set_line_coding() first
   cdc_line_coding_t line_coding = { 0 };
   if (tuh_cdc_get_local_line_coding(idx, &line_coding)) {
-    printf("  Baudrate: %lu, Stop Bits : %u\r\n", line_coding.bit_rate, line_coding.stop_bits);
+    printf("  Baudrate: %" PRIu32 ", Stop Bits : %u\r\n", line_coding.bit_rate, line_coding.stop_bits);
     printf("  Parity  : %u, Data Width: %u\r\n", line_coding.parity, line_coding.data_bits);
   }
 #endif
diff --git a/examples/host/cdc_msc_hid_freertos/src/main.c b/examples/host/cdc_msc_hid_freertos/src/main.c
index 069cbdc90..fa799aede 100644
--- a/examples/host/cdc_msc_hid_freertos/src/main.c
+++ b/examples/host/cdc_msc_hid_freertos/src/main.c
@@ -30,7 +30,7 @@
 #include "bsp/board_api.h"
 #include "tusb.h"
 
-#if TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
+#if TUP_MCU_ESPRESSIF
   // ESP-IDF need "freertos/" prefix in include path.
   // CFG_TUSB_OS_INC_PATH should be defined accordingly.
   #include "freertos/FreeRTOS.h"
@@ -107,14 +107,14 @@ int main(void) {
   xTimerStart(blinky_tm, 0);
 
   // skip starting scheduler (and return) for ESP32-S2 or ESP32-S3
-#if !TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
+#if !TUP_MCU_ESPRESSIF
   vTaskStartScheduler();
 #endif
 
   return 0;
 }
 
-#if TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
+#if TUP_MCU_ESPRESSIF
 void app_main(void) {
   main();
 }
@@ -126,7 +126,10 @@ static void usb_host_task(void *param) {
   (void) param;
 
   // init host stack on configured roothub port
-  tuh_init(BOARD_TUH_RHPORT);
+  if (!tuh_init(BOARD_TUH_RHPORT)) {
+    printf("Failed to init USB Host Stack\r\n");
+    vTaskSuspend(NULL);
+  }
 
   if (board_init_after_tusb) {
     board_init_after_tusb();
diff --git a/examples/host/cdc_msc_hid_freertos/src/msc_app.c b/examples/host/cdc_msc_hid_freertos/src/msc_app.c
index ee02ba917..9ffd5d965 100644
--- a/examples/host/cdc_msc_hid_freertos/src/msc_app.c
+++ b/examples/host/cdc_msc_hid_freertos/src/msc_app.c
@@ -47,8 +47,8 @@ bool inquiry_complete_cb(uint8_t dev_addr, tuh_msc_complete_data_t const *cb_dat
   uint32_t const block_count = tuh_msc_get_block_count(dev_addr, cbw->lun);
   uint32_t const block_size = tuh_msc_get_block_size(dev_addr, cbw->lun);
 
-  printf("Disk Size: %lu MB\r\n", block_count / ((1024 * 1024) / block_size));
-  printf("Block Count = %lu, Block Size: %lu\r\n", block_count, block_size);
+  printf("Disk Size: %" PRIu32 " MB\r\n", block_count / ((1024 * 1024) / block_size));
+  printf("Block Count = %" PRIu32 ", Block Size: %" PRIu32 "\r\n", block_count, block_size);
 
   return true;
 }
diff --git a/examples/host/cdc_msc_hid_freertos/src/tusb_config.h b/examples/host/cdc_msc_hid_freertos/src/tusb_config.h
index 35de5ee50..0aab2cd2f 100644
--- a/examples/host/cdc_msc_hid_freertos/src/tusb_config.h
+++ b/examples/host/cdc_msc_hid_freertos/src/tusb_config.h
@@ -44,7 +44,7 @@
 #endif
 
 // Espressif IDF requires "freertos/" prefix in include path
-#if TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
+#if TUP_MCU_ESPRESSIF
 #define CFG_TUSB_OS_INC_PATH  freertos/
 #endif
 
diff --git a/examples/host/device_info/CMakeLists.txt b/examples/host/device_info/CMakeLists.txt
new file mode 100644
index 000000000..76182d6fa
--- /dev/null
+++ b/examples/host/device_info/CMakeLists.txt
@@ -0,0 +1,32 @@
+cmake_minimum_required(VERSION 3.17)
+
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/family_support.cmake)
+
+# gets PROJECT name for the example
+family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
+
+project(${PROJECT} C CXX ASM)
+
+# Checks this example is valid for the family and initializes the project
+family_initialize_project(${PROJECT} ${CMAKE_CURRENT_LIST_DIR})
+
+# Espressif has its own cmake build system
+if(FAMILY STREQUAL "espressif")
+  return()
+endif()
+
+add_executable(${PROJECT})
+
+# Example source
+target_sources(${PROJECT} PUBLIC
+        ${CMAKE_CURRENT_SOURCE_DIR}/src/main.c
+        )
+
+# Example include
+target_include_directories(${PROJECT} PUBLIC
+        ${CMAKE_CURRENT_SOURCE_DIR}/src
+        )
+
+# Configure compilation flags and libraries for the example without RTOS.
+# See the corresponding function in hw/bsp/FAMILY/family.cmake for details.
+family_configure_host_example(${PROJECT} noos)
diff --git a/examples/host/device_info/Makefile b/examples/host/device_info/Makefile
new file mode 100644
index 000000000..0235e08c3
--- /dev/null
+++ b/examples/host/device_info/Makefile
@@ -0,0 +1,13 @@
+include ../../build_system/make/make.mk
+
+INC += \
+	src \
+	$(TOP)/hw \
+
+# Example source
+EXAMPLE_SOURCE += \
+	src/main.c
+
+SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
+
+include ../../build_system/make/rules.mk
diff --git a/examples/host/device_info/only.txt b/examples/host/device_info/only.txt
new file mode 100644
index 000000000..fee10f9e2
--- /dev/null
+++ b/examples/host/device_info/only.txt
@@ -0,0 +1,14 @@
+mcu:KINETIS_KL
+mcu:LPC175X_6X
+mcu:LPC177X_8X
+mcu:LPC18XX
+mcu:LPC40XX
+mcu:LPC43XX
+mcu:MIMXRT1XXX
+mcu:MIMXRT10XX
+mcu:MIMXRT11XX
+mcu:RP2040
+mcu:MSP432E4
+mcu:RX65X
+mcu:RAXXX
+mcu:MAX3421
diff --git a/examples/host/device_info/src/main.c b/examples/host/device_info/src/main.c
new file mode 100644
index 000000000..18beea663
--- /dev/null
+++ b/examples/host/device_info/src/main.c
@@ -0,0 +1,210 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Ha Thach (tinyusb.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+
+/* Host example will get device descriptors of attached devices and print it out via uart/rtt (logger) as follows:
+ *    Device 1: ID 046d:c52f
+      Device Descriptor:
+        bLength             18
+        bDescriptorType     1
+        bcdUSB              0200
+        bDeviceClass        0
+        bDeviceSubClass     0
+        bDeviceProtocol     0
+        bMaxPacketSize0     8
+        idVendor            0x046d
+        idProduct           0xc52f
+        bcdDevice           2200
+        iManufacturer       1     Logitech
+        iProduct            2     USB Receiver
+        iSerialNumber       0
+        bNumConfigurations  1
+ *
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "bsp/board_api.h"
+#include "tusb.h"
+
+// English
+#define LANGUAGE_ID 0x0409
+
+//--------------------------------------------------------------------+
+// MACRO CONSTANT TYPEDEF PROTYPES
+//--------------------------------------------------------------------+
+void led_blinking_task(void);
+static void print_utf16(uint16_t* temp_buf, size_t buf_len);
+
+/*------------- MAIN -------------*/
+int main(void) {
+  board_init();
+
+  printf("TinyUSB Device Info Example\r\n");
+
+  // init host stack on configured roothub port
+  tuh_init(BOARD_TUH_RHPORT);
+
+  if (board_init_after_tusb) {
+    board_init_after_tusb();
+  }
+
+  while (1) {
+    // tinyusb host task
+    tuh_task();
+    led_blinking_task();
+  }
+
+  return 0;
+}
+
+/*------------- TinyUSB Callbacks -------------*/
+
+// Invoked when device is mounted (configured)
+void tuh_mount_cb(uint8_t daddr) {
+  // Get Device Descriptor
+  tusb_desc_device_t desc_device;
+  uint8_t xfer_result = tuh_descriptor_get_device_sync(daddr, &desc_device, 18);
+  if (XFER_RESULT_SUCCESS != xfer_result) {
+    printf("Failed to get device descriptor\r\n");
+    return;
+  }
+
+  uint16_t buf[256];
+
+  printf("Device %u: ID %04x:%04x\r\n", daddr, desc_device.idVendor, desc_device.idProduct);
+  printf("Device Descriptor:\r\n");
+  printf("  bLength             %u\r\n", desc_device.bLength);
+  printf("  bDescriptorType     %u\r\n", desc_device.bDescriptorType);
+  printf("  bcdUSB              %04x\r\n", desc_device.bcdUSB);
+  printf("  bDeviceClass        %u\r\n", desc_device.bDeviceClass);
+  printf("  bDeviceSubClass     %u\r\n", desc_device.bDeviceSubClass);
+  printf("  bDeviceProtocol     %u\r\n", desc_device.bDeviceProtocol);
+  printf("  bMaxPacketSize0     %u\r\n", desc_device.bMaxPacketSize0);
+  printf("  idVendor            0x%04x\r\n", desc_device.idVendor);
+  printf("  idProduct           0x%04x\r\n", desc_device.idProduct);
+  printf("  bcdDevice           %04x\r\n", desc_device.bcdDevice);
+
+  // Get String descriptor using Sync API
+
+  printf("  iManufacturer       %u     ", desc_device.iManufacturer);
+  xfer_result = tuh_descriptor_get_manufacturer_string_sync(daddr, LANGUAGE_ID, buf, sizeof(buf));
+  if (XFER_RESULT_SUCCESS == xfer_result) {
+    print_utf16(buf, TU_ARRAY_SIZE(buf));
+  }
+  printf("\r\n");
+
+  printf("  iProduct            %u     ", desc_device.iProduct);
+  xfer_result = tuh_descriptor_get_product_string_sync(daddr, LANGUAGE_ID, buf, sizeof(buf));
+  if (XFER_RESULT_SUCCESS == xfer_result) {
+    print_utf16(buf, TU_ARRAY_SIZE(buf));
+  }
+  printf("\r\n");
+
+  printf("  iSerialNumber       %u     ", desc_device.iSerialNumber);
+  xfer_result = tuh_descriptor_get_serial_string_sync(daddr, LANGUAGE_ID, buf, sizeof(buf));
+  if (XFER_RESULT_SUCCESS == xfer_result) {
+    print_utf16(buf, TU_ARRAY_SIZE(buf));
+  }
+  printf("\r\n");
+
+  printf("  bNumConfigurations  %u\r\n", desc_device.bNumConfigurations);
+}
+
+/// Invoked when device is unmounted (bus reset/unplugged)
+void tuh_umount_cb(uint8_t daddr) {
+  printf("Device removed, address = %d\r\n", daddr);
+}
+
+//--------------------------------------------------------------------+
+// Blinking Task
+//--------------------------------------------------------------------+
+void led_blinking_task(void) {
+  const uint32_t interval_ms = 1000;
+  static uint32_t start_ms = 0;
+
+  static bool led_state = false;
+
+  // Blink every interval ms
+  if (board_millis() - start_ms < interval_ms) return; // not enough time
+  start_ms += interval_ms;
+
+  board_led_write(led_state);
+  led_state = 1 - led_state; // toggle
+}
+
+//--------------------------------------------------------------------+
+// String Descriptor Helper
+//--------------------------------------------------------------------+
+
+static void _convert_utf16le_to_utf8(const uint16_t* utf16, size_t utf16_len, uint8_t* utf8, size_t utf8_len) {
+  // TODO: Check for runover.
+  (void) utf8_len;
+  // Get the UTF-16 length out of the data itself.
+
+  for (size_t i = 0; i < utf16_len; i++) {
+    uint16_t chr = utf16[i];
+    if (chr < 0x80) {
+      *utf8++ = chr & 0xffu;
+    } else if (chr < 0x800) {
+      *utf8++ = (uint8_t) (0xC0 | (chr >> 6 & 0x1F));
+      *utf8++ = (uint8_t) (0x80 | (chr >> 0 & 0x3F));
+    } else {
+      // TODO: Verify surrogate.
+      *utf8++ = (uint8_t) (0xE0 | (chr >> 12 & 0x0F));
+      *utf8++ = (uint8_t) (0x80 | (chr >> 6 & 0x3F));
+      *utf8++ = (uint8_t) (0x80 | (chr >> 0 & 0x3F));
+    }
+    // TODO: Handle UTF-16 code points that take two entries.
+  }
+}
+
+// Count how many bytes a utf-16-le encoded string will take in utf-8.
+static int _count_utf8_bytes(const uint16_t* buf, size_t len) {
+  size_t total_bytes = 0;
+  for (size_t i = 0; i < len; i++) {
+    uint16_t chr = buf[i];
+    if (chr < 0x80) {
+      total_bytes += 1;
+    } else if (chr < 0x800) {
+      total_bytes += 2;
+    } else {
+      total_bytes += 3;
+    }
+    // TODO: Handle UTF-16 code points that take two entries.
+  }
+  return (int) total_bytes;
+}
+
+static void print_utf16(uint16_t* temp_buf, size_t buf_len) {
+  if ((temp_buf[0] & 0xff) == 0) return;  // empty
+  size_t utf16_len = ((temp_buf[0] & 0xff) - 2) / sizeof(uint16_t);
+  size_t utf8_len = (size_t) _count_utf8_bytes(temp_buf + 1, utf16_len);
+  _convert_utf16le_to_utf8(temp_buf + 1, utf16_len, (uint8_t*) temp_buf, sizeof(uint16_t) * buf_len);
+  ((uint8_t*) temp_buf)[utf8_len] = '\0';
+
+  printf("%s", (char*) temp_buf);
+}
diff --git a/examples/host/device_info/src/tusb_config.h b/examples/host/device_info/src/tusb_config.h
new file mode 100644
index 000000000..2e9731eaf
--- /dev/null
+++ b/examples/host/device_info/src/tusb_config.h
@@ -0,0 +1,115 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Ha Thach (tinyusb.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+
+#ifndef TUSB_CONFIG_H_
+#define TUSB_CONFIG_H_
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+//--------------------------------------------------------------------
+// Common Configuration
+//--------------------------------------------------------------------
+
+// defined by compiler flags for flexibility
+#ifndef CFG_TUSB_MCU
+#error CFG_TUSB_MCU must be defined
+#endif
+
+#ifndef CFG_TUSB_OS
+#define CFG_TUSB_OS           OPT_OS_NONE
+#endif
+
+#ifndef CFG_TUSB_DEBUG
+#define CFG_TUSB_DEBUG        0
+#endif
+
+/* USB DMA on some MCUs can only access a specific SRAM region with restriction on alignment.
+ * Tinyusb use follows macros to declare transferring memory so that they can be put
+ * into those specific section.
+ * e.g
+ * - CFG_TUSB_MEM SECTION : __attribute__ (( section(".usb_ram") ))
+ * - CFG_TUSB_MEM_ALIGN   : __attribute__ ((aligned(4)))
+ */
+#ifndef CFG_TUH_MEM_SECTION
+#define CFG_TUH_MEM_SECTION
+#endif
+
+#ifndef CFG_TUH_MEM_ALIGN
+#define CFG_TUH_MEM_ALIGN     __attribute__ ((aligned(4)))
+#endif
+
+//--------------------------------------------------------------------
+// Host Configuration
+//--------------------------------------------------------------------
+
+// Enable Host stack
+#define CFG_TUH_ENABLED       1
+
+#if CFG_TUSB_MCU == OPT_MCU_RP2040
+  // #define CFG_TUH_RPI_PIO_USB   1 // use pio-usb as host controller
+  // #define CFG_TUH_MAX3421       1 // use max3421 as host controller
+
+  // host roothub port is 1 if using either pio-usb or max3421
+  #if (defined(CFG_TUH_RPI_PIO_USB) && CFG_TUH_RPI_PIO_USB) || (defined(CFG_TUH_MAX3421) && CFG_TUH_MAX3421)
+    #define BOARD_TUH_RHPORT      1
+  #endif
+#endif
+
+// Default is max speed that hardware controller could support with on-chip PHY
+#define CFG_TUH_MAX_SPEED     BOARD_TUH_MAX_SPEED
+
+//------------------------- Board Specific --------------------------
+
+// RHPort number used for host can be defined by board.mk, default to port 0
+#ifndef BOARD_TUH_RHPORT
+#define BOARD_TUH_RHPORT      0
+#endif
+
+// RHPort max operational speed can defined by board.mk
+#ifndef BOARD_TUH_MAX_SPEED
+#define BOARD_TUH_MAX_SPEED   OPT_MODE_DEFAULT_SPEED
+#endif
+
+//--------------------------------------------------------------------
+// Driver Configuration
+//--------------------------------------------------------------------
+
+// Size of buffer to hold descriptors and other data used for enumeration
+#define CFG_TUH_ENUMERATION_BUFSIZE 256
+
+// only hub class is enabled
+#define CFG_TUH_HUB                 1
+
+// max device support (excluding hub device)
+// 1 hub typically has 4 ports
+#define CFG_TUH_DEVICE_MAX          (3*CFG_TUH_HUB + 1)
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif
diff --git a/examples/host/hid_controller/src/hid_app.c b/examples/host/hid_controller/src/hid_app.c
index bff830ca2..6ffe0b6d4 100644
--- a/examples/host/hid_controller/src/hid_app.c
+++ b/examples/host/hid_controller/src/hid_app.c
@@ -253,6 +253,7 @@ bool diff_report(sony_ds4_report_t const* rpt1, sony_ds4_report_t const* rpt2)
 
 void process_sony_ds4(uint8_t const* report, uint16_t len)
 {
+  (void)len;
   const char* dpad_str[] = { "N", "NE", "E", "SE", "S", "SW", "W", "NW", "none" };
 
   // previous report used to compare for changes
diff --git a/examples/host/msc_file_explorer/src/main.c b/examples/host/msc_file_explorer/src/main.c
index 73f3e9eb5..f6b6810f5 100644
--- a/examples/host/msc_file_explorer/src/main.c
+++ b/examples/host/msc_file_explorer/src/main.c
@@ -72,8 +72,7 @@ extern bool msc_app_init(void);
 extern void msc_app_task(void);
 
 /*------------- MAIN -------------*/
-int main(void)
-{
+int main(void) {
   board_init();
 
   printf("TinyUSB Host MassStorage Explorer Example\r\n");
@@ -87,8 +86,7 @@ int main(void)
 
   msc_app_init();
 
-  while (1)
-  {
+  while (1) {
     // tinyusb host task
     tuh_task();
 
@@ -103,28 +101,25 @@ int main(void)
 // TinyUSB Callbacks
 //--------------------------------------------------------------------+
 
-void tuh_mount_cb(uint8_t dev_addr)
-{
+void tuh_mount_cb(uint8_t dev_addr) {
   (void) dev_addr;
 }
 
-void tuh_umount_cb(uint8_t dev_addr)
-{
+void tuh_umount_cb(uint8_t dev_addr) {
   (void) dev_addr;
 }
 
 //--------------------------------------------------------------------+
 // Blinking Task
 //--------------------------------------------------------------------+
-void led_blinking_task(void)
-{
+void led_blinking_task(void) {
   const uint32_t interval_ms = 1000;
   static uint32_t start_ms = 0;
 
   static bool led_state = false;
 
   // Blink every interval ms
-  if ( board_millis() - start_ms < interval_ms) return; // not enough time
+  if (board_millis() - start_ms < interval_ms) return; // not enough time
   start_ms += interval_ms;
 
   board_led_write(led_state);
diff --git a/examples/host/msc_file_explorer/src/msc_app.c b/examples/host/msc_file_explorer/src/msc_app.c
index ecea614a2..ddd39c674 100644
--- a/examples/host/msc_file_explorer/src/msc_app.c
+++ b/examples/host/msc_file_explorer/src/msc_app.c
@@ -95,7 +95,6 @@ void msc_app_task(void)
 //
 //--------------------------------------------------------------------+
 
-
 bool inquiry_complete_cb(uint8_t dev_addr, tuh_msc_complete_data_t const * cb_data)
 {
   msc_cbw_t const* cbw = cb_data->cbw;
@@ -114,7 +113,7 @@ bool inquiry_complete_cb(uint8_t dev_addr, tuh_msc_complete_data_t const * cb_da
   uint32_t const block_count = tuh_msc_get_block_count(dev_addr, cbw->lun);
   uint32_t const block_size = tuh_msc_get_block_size(dev_addr, cbw->lun);
 
-  printf("Disk Size: %lu MB\r\n", block_count / ((1024*1024)/block_size));
+  printf("Disk Size: %" PRIu32 " MB\r\n", block_count / ((1024*1024)/block_size));
   // printf("Block Count = %lu, Block Size: %lu\r\n", block_count, block_size);
 
   // For simplicity: we only mount 1 LUN per device
@@ -541,10 +540,10 @@ void cli_cmd_ls(EmbeddedCli *cli, char *args, void *context)
         printf("%-40s", fno.fname);
         if (fno.fsize < 1024)
         {
-          printf("%lu B\r\n", fno.fsize);
+          printf("%" PRIu32 " B\r\n", fno.fsize);
         }else
         {
-          printf("%lu KB\r\n", fno.fsize / 1024);
+          printf("%" PRIu32 " KB\r\n", fno.fsize / 1024);
         }
       }
     }