Merge pull request #2989 from hathach/rtos-house-keeping

Rtos house keeping

15 files changed, 50 insertions, 1332 deletions

diff --git a/examples/build_system/make/make.mk b/examples/build_system/make/make.mk
index 1500a51e0..3101b66b9 100644
--- a/examples/build_system/make/make.mk
+++ b/examples/build_system/make/make.mk
@@ -6,7 +6,6 @@
 # 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)))
@@ -65,7 +64,9 @@ BUILD := _build/$(BOARD)
 PROJECT := $(notdir $(CURDIR))
 BIN := $(TOP)/_bin/$(BOARD)/$(notdir $(CURDIR))
 
-#-------------- Select the board to build for. ------------
+#-------------------------------------------------------------
+# Board / Family
+#-------------------------------------------------------------
 
 # Board without family
 ifneq ($(wildcard $(TOP)/hw/bsp/$(BOARD)/board.mk),)
@@ -93,7 +94,9 @@ else
   SRC_C += $(subst $(TOP)/,,$(wildcard $(TOP)/$(FAMILY_PATH)/*.c))
 endif
 
-#-------------- Source files and compiler flags --------------
+#-------------------------------------------------------------
+# Source files and compiler flags
+#-------------------------------------------------------------
 # tinyusb makefile
 include $(TOP)/src/tinyusb.mk
 SRC_C += $(TINYUSB_SRC_C)
@@ -148,7 +151,37 @@ endif
 # toolchain specific
 include ${TOP}/examples/build_system/make/toolchain/arm_$(TOOLCHAIN).mk
 
-# Handy check parameter function
+#---------------------- FreeRTOS -----------------------
+FREERTOS_SRC = lib/FreeRTOS-Kernel
+FREERTOS_PORTABLE_PATH = $(FREERTOS_SRC)/portable/$(if $(findstring iar,$(TOOLCHAIN)),IAR,GCC)
+
+ifeq ($(RTOS),freertos)
+	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))
+	INC += \
+		$(TOP)/hw/bsp/$(FAMILY)/FreeRTOSConfig \
+		$(TOP)/$(FREERTOS_SRC)/include \
+		$(TOP)/$(FREERTOS_PORTABLE_SRC)
+
+	CFLAGS += -DCFG_TUSB_OS=OPT_OS_FREERTOS
+
+	# Suppress FreeRTOSConfig.h warnings
+	CFLAGS_GCC += -Wno-error=redundant-decls
+
+	# Suppress FreeRTOS source warnings
+	CFLAGS_GCC += -Wno-error=cast-qual
+
+	# FreeRTOS (lto + Os) linker issue
+	LDFLAGS_GCC += -Wl,--undefined=vTaskSwitchContext
+endif
+
+#---------------- Helper ----------------
 check_defined = \
     $(strip $(foreach 1,$1, \
     $(call __check_defined,$1,$(strip $(value 2)))))
diff --git a/examples/device/audio_4_channel_mic_freertos/Makefile b/examples/device/audio_4_channel_mic_freertos/Makefile
index 0202f631c..bd625b345 100644
--- a/examples/device/audio_4_channel_mic_freertos/Makefile
+++ b/examples/device/audio_4_channel_mic_freertos/Makefile
@@ -1,14 +1,9 @@
+RTOS = freertos
 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 = \
@@ -17,21 +12,4 @@ EXAMPLE_SOURCE = \
 
 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/src/FreeRTOSConfig/FreeRTOSConfig.h b/examples/device/audio_4_channel_mic_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h
deleted file mode 100644
index 902a54f08..000000000
--- a/examples/device/audio_4_channel_mic_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h
+++ /dev/null
@@ -1,191 +0,0 @@
-/*
- * 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 TUSB_MCU_VENDOR_ESPRESSIF
-  #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/Makefile b/examples/device/audio_test_freertos/Makefile
index 0202f631c..bd625b345 100644
--- a/examples/device/audio_test_freertos/Makefile
+++ b/examples/device/audio_test_freertos/Makefile
@@ -1,14 +1,9 @@
+RTOS = freertos
 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 = \
@@ -17,21 +12,4 @@ EXAMPLE_SOURCE = \
 
 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/src/FreeRTOSConfig/FreeRTOSConfig.h b/examples/device/audio_test_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h
deleted file mode 100644
index 902a54f08..000000000
--- a/examples/device/audio_test_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h
+++ /dev/null
@@ -1,191 +0,0 @@
-/*
- * 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 TUSB_MCU_VENDOR_ESPRESSIF
-  #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/cdc_msc_freertos/Makefile b/examples/device/cdc_msc_freertos/Makefile
index c90922b0c..10cff57a0 100644
--- a/examples/device/cdc_msc_freertos/Makefile
+++ b/examples/device/cdc_msc_freertos/Makefile
@@ -1,14 +1,9 @@
+RTOS = freertos
 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 = \
@@ -18,28 +13,4 @@ EXAMPLE_SOURCE = \
 
 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))
-
-# include heap manage if configSUPPORT_DYNAMIC_ALLOCATION = 1
-# SRC_C += $(FREERTOS_SRC)/portable/MemMang/heap_1.c
-# CFLAGS += -Wno-error=sign-compare
-
-# Suppress FreeRTOSConfig.h warnings
-CFLAGS_GCC += -Wno-error=redundant-decls
-
-# Suppress FreeRTOS source warnings
-CFLAGS_GCC += -Wno-error=cast-qual
-
-# FreeRTOS (lto + Os) linker issue
-LDFLAGS_GCC += -Wl,--undefined=vTaskSwitchContext
-
 include ../../build_system/make/rules.mk
diff --git a/examples/device/cdc_msc_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h b/examples/device/cdc_msc_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h
deleted file mode 100644
index 902a54f08..000000000
--- a/examples/device/cdc_msc_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h
+++ /dev/null
@@ -1,191 +0,0 @@
-/*
- * 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 TUSB_MCU_VENDOR_ESPRESSIF
-  #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/hid_composite_freertos/Makefile b/examples/device/hid_composite_freertos/Makefile
index 38d842b3a..bd625b345 100644
--- a/examples/device/hid_composite_freertos/Makefile
+++ b/examples/device/hid_composite_freertos/Makefile
@@ -1,16 +1,9 @@
-DEPS_SUBMODULES += lib/FreeRTOS-Kernel
-
+RTOS = freertos
 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 = \
@@ -19,28 +12,4 @@ EXAMPLE_SOURCE = \
 
 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))
-
-# include heap manage if configSUPPORT_DYNAMIC_ALLOCATION = 1
-# SRC_C += $(FREERTOS_SRC)/portable/MemMang/heap_1.c
-# CFLAGS += -Wno-error=sign-compare
-
-# Suppress FreeRTOSConfig.h warnings
-CFLAGS_GCC += -Wno-error=redundant-decls
-
-# Suppress FreeRTOS source warnings
-CFLAGS_GCC += -Wno-error=cast-qual
-
-# FreeRTOS (lto + Os) linker issue
-LDFLAGS_GCC += -Wl,--undefined=vTaskSwitchContext
-
 include ../../build_system/make/rules.mk
diff --git a/examples/device/hid_composite_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h b/examples/device/hid_composite_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h
deleted file mode 100644
index 902a54f08..000000000
--- a/examples/device/hid_composite_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h
+++ /dev/null
@@ -1,191 +0,0 @@
-/*
- * 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 TUSB_MCU_VENDOR_ESPRESSIF
-  #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/midi_test_freertos/Makefile b/examples/device/midi_test_freertos/Makefile
index 0f504bbe6..26cd83486 100644
--- a/examples/device/midi_test_freertos/Makefile
+++ b/examples/device/midi_test_freertos/Makefile
@@ -1,14 +1,9 @@
+RTOS = freertos
 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 \
 	$(TOP)/hw \
-	${TOP}/${FAMILY_PATH}/FreeRTOSConfig \
-	$(TOP)/$(FREERTOS_SRC)/include \
-	$(TOP)/$(FREERTOS_PORTABLE_SRC) \
 
 # Example source
 EXAMPLE_SOURCE += \
@@ -17,24 +12,4 @@ EXAMPLE_SOURCE += \
 
 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 FreeRTOSConfig.h warnings
-CFLAGS_GCC += -Wno-error=redundant-decls
-
-# Suppress FreeRTOS source warnings
-CFLAGS_GCC += -Wno-error=cast-qual
-
-# FreeRTOS (lto + Os) linker issue
-LDFLAGS_GCC += -Wl,--undefined=vTaskSwitchContext
-
 include ../../build_system/make/rules.mk
diff --git a/examples/host/cdc_msc_hid_freertos/Makefile b/examples/host/cdc_msc_hid_freertos/Makefile
index 67fbb9af3..178341f81 100644
--- a/examples/host/cdc_msc_hid_freertos/Makefile
+++ b/examples/host/cdc_msc_hid_freertos/Makefile
@@ -1,14 +1,9 @@
+RTOS = freertos
 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 = \
@@ -19,15 +14,4 @@ EXAMPLE_SOURCE = \
 
 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))
-
 include ../../build_system/make/rules.mk
diff --git a/examples/host/cdc_msc_hid_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h b/examples/host/cdc_msc_hid_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h
deleted file mode 100644
index 6a886adec..000000000
--- a/examples/host/cdc_msc_hid_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h
+++ /dev/null
@@ -1,199 +0,0 @@
-/*
- * 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 TUSB_MCU_VENDOR_ESPRESSIF
-  #error "ESP32-Sx should use IDF's FreeRTOSConfig.h"
-#endif
-
-#ifdef __GNUC__
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wredundant-decls"
-#endif
-
-// TODO fix later
-// FIXME cause redundant-decls warnings
-#if CFG_TUSB_MCU == OPT_MCU_MM32F327X
-  extern u32 SystemCoreClock;
-#else
-  extern uint32_t SystemCoreClock;
-#endif
-
-#ifdef __GNUC__
-#pragma GCC diagnostic pop
-#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 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/hw/bsp/board.c b/hw/bsp/board.c
index 5bcdb7f15..0e0fa4ac6 100644
--- a/hw/bsp/board.c
+++ b/hw/bsp/board.c
@@ -64,9 +64,7 @@ int sys_read(int fhdl, char *buf, size_t count) {
 #endif
 
 #elif defined(LOGGER_SWO)
-// Logging with SWO for ARM Cortex
-#include "board_mcu.h"
-
+// Logging with SWO for ARM Cortex-M
 int sys_write (int fhdl, const char *buf, size_t count) {
   (void) fhdl;
   uint8_t const* buf8 = (uint8_t const*) buf;
diff --git a/hw/bsp/board_mcu.h b/hw/bsp/board_mcu.h
deleted file mode 100644
index e720cd747..000000000
--- a/hw/bsp/board_mcu.h
+++ /dev/null
@@ -1,193 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2020, 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.
- *
- * This file is part of the TinyUSB stack.
- */
-
-
-#ifndef BOARD_MCU_H_
-#define BOARD_MCU_H_
-
-#include "tusb_option.h"
-
-//--------------------------------------------------------------------+
-// Low Level MCU header include. Example should be
-// platform independent and mostly doesn't need to include this file.
-// However there are still certain situation where this file is needed:
-// - FreeRTOSConfig.h to set up correct clock and NVIC interrupts for ARM Cortex
-// - SWO logging for Cortex M with ITM_SendChar() / ITM_ReceiveChar()
-//--------------------------------------------------------------------+
-
-// Include order follows OPT_MCU_ number
-#if   TU_CHECK_MCU(OPT_MCU_LPC11UXX, OPT_MCU_LPC13XX, OPT_MCU_LPC15XX) || \
-  TU_CHECK_MCU(OPT_MCU_LPC175X_6X, OPT_MCU_LPC177X_8X, OPT_MCU_LPC18XX)  || \
-  TU_CHECK_MCU(OPT_MCU_LPC40XX, OPT_MCU_LPC43XX)
-  #include "chip.h"
-
-#elif TU_CHECK_MCU(OPT_MCU_LPC51UXX, OPT_MCU_LPC54XXX, OPT_MCU_LPC55XX, OPT_MCU_MCXN9)
-  #include "fsl_device_registers.h"
-
-#elif TU_CHECK_MCU(OPT_MCU_KINETIS_KL, OPT_MCU_KINETIS_K32L, OPT_MCU_KINETIS_K)
-  #include "fsl_device_registers.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_NRF5X
-  #include "nrf.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_SAMD11 || CFG_TUSB_MCU == OPT_MCU_SAMD21 || \
-  CFG_TUSB_MCU == OPT_MCU_SAMD51 || CFG_TUSB_MCU == OPT_MCU_SAME5X || \
-  CFG_TUSB_MCU == OPT_MCU_SAML22 || CFG_TUSB_MCU == OPT_MCU_SAML21
-  #include "sam.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_SAMG
-  #undef LITTLE_ENDIAN // hack to suppress "LITTLE_ENDIAN" redefined
-  #include "sam.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_STM32F0
-  #include "stm32f0xx.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_STM32F1
-  #include "stm32f1xx.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_STM32F2
-  #include "stm32f2xx.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_STM32F3
-  #include "stm32f3xx.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_STM32F4
-  #include "stm32f4xx.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_STM32F7
-  #include "stm32f7xx.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_STM32G4
-  #include "stm32g4xx.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_STM32H5
-  #include "stm32h5xx.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_STM32H7
-  #include "stm32h7xx.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_STM32L0
-  #include "stm32l0xx.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_STM32L1
-  #include "stm32l1xx.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_STM32L4
-  #include "stm32l4xx.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_STM32WB
-  #include "stm32wbxx.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_STM32U5
-  #include "stm32u5xx.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_STM32G0
-  #include "stm32g0xx.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_STM32C0
-  #include "stm32c0xx.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_CXD56
-  // no header needed
-
-#elif CFG_TUSB_MCU == OPT_MCU_MSP430x5xx
-  #include "msp430.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_MSP432E4
-  #include "msp.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_VALENTYUSB_EPTRI
-  // no header needed
-
-#elif CFG_TUSB_MCU == OPT_MCU_MIMXRT1XXX
-  #include "fsl_device_registers.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_NUC120
-  #include "NUC100Series.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_NUC121 || CFG_TUSB_MCU == OPT_MCU_NUC126
-  #include "NuMicro.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_NUC505
-  #include "NUC505Series.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_ESP32S2
-  // no header needed
-
-#elif CFG_TUSB_MCU == OPT_MCU_ESP32S3
-  // no header needed
-
-#elif CFG_TUSB_MCU == OPT_MCU_DA1469X
-  #include "DA1469xAB.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_RP2040
-  #include "pico.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_EFM32GG
-  #include "em_device.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_RX63X || CFG_TUSB_MCU == OPT_MCU_RX65X
-  // no header needed
-
-#elif CFG_TUSB_MCU == OPT_MCU_RAXXX
-  #include "bsp_api.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_GD32VF103
-  #include "gd32vf103.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_MM32F327X
-  #include "mm32_device.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_XMC4000
-  #include "xmc_device.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_TM4C123
-  #include "TM4C123.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_CH32F20X
-  #include "ch32f20x.h"
-
-#elif TU_CHECK_MCU(OPT_MCU_BCM2711, OPT_MCU_BCM2835, OPT_MCU_BCM2837)
-  // no header needed
-
-#elif CFG_TUSB_MCU == OPT_MCU_MAX32690
-  #include "max32690.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_MAX32650
-  #include "max32650.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_MAX32666
-  #include "max32665.h"
-
-#elif CFG_TUSB_MCU == OPT_MCU_MAX78002
-  #include "max78002.h"
-
-#else
-  #error "Missing MCU header"
-#endif
-
-
-#endif /* BOARD_MCU_H_ */
diff --git a/src/osal/osal_none.h b/src/osal/osal_none.h
index c93f7a86c..40e9bb83a 100644
--- a/src/osal/osal_none.h
+++ b/src/osal/osal_none.h
@@ -137,18 +137,6 @@ typedef osal_queue_def_t* osal_queue_t;
     .ff = TU_FIFO_INIT(_name##_buf, _depth, _type, false) \
   }
 
-// lock queue by disable USB interrupt
-TU_ATTR_ALWAYS_INLINE static inline void _osal_q_lock(osal_queue_t qhdl) {
-  // disable dcd/hcd interrupt
-  qhdl->interrupt_set(false);
-}
-
-// unlock queue
-TU_ATTR_ALWAYS_INLINE static inline void _osal_q_unlock(osal_queue_t qhdl) {
-  // enable dcd/hcd interrupt
-  qhdl->interrupt_set(true);
-}
-
 TU_ATTR_ALWAYS_INLINE static inline osal_queue_t osal_queue_create(osal_queue_def_t* qdef) {
   tu_fifo_clear(&qdef->ff);
   return (osal_queue_t) qdef;
@@ -162,22 +150,22 @@ TU_ATTR_ALWAYS_INLINE static inline bool osal_queue_delete(osal_queue_t qhdl) {
 TU_ATTR_ALWAYS_INLINE static inline bool osal_queue_receive(osal_queue_t qhdl, void* data, uint32_t msec) {
   (void) msec; // not used, always behave as msec = 0
 
-  _osal_q_lock(qhdl);
-  bool success = tu_fifo_read(&qhdl->ff, data);
-  _osal_q_unlock(qhdl);
+  qhdl->interrupt_set(false);
+  const bool success = tu_fifo_read(&qhdl->ff, data);
+  qhdl->interrupt_set(true);
 
   return success;
 }
 
 TU_ATTR_ALWAYS_INLINE static inline bool osal_queue_send(osal_queue_t qhdl, void const* data, bool in_isr) {
   if (!in_isr) {
-    _osal_q_lock(qhdl);
+    qhdl->interrupt_set(false);
   }
 
-  bool success = tu_fifo_write(&qhdl->ff, data);
+  const bool success = tu_fifo_write(&qhdl->ff, data);
 
   if (!in_isr) {
-    _osal_q_unlock(qhdl);
+    qhdl->interrupt_set(true);
   }
 
   return success;