Merge branch 'master' into develop

26 files changed, 2136 insertions, 23 deletions

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 2ac5b2ba0..4fc11f3dd 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -52,12 +52,4 @@ jobs:
     
     - name: Build
       run: python3 tools/build_all.py ${{ matrix.example }}
-      
-  trigger-mynewt:
-    runs-on: ubuntu-latest
-    needs: build
-    steps:
-    - name: Trigger mynewt-tinyusb-example
-      shell: bash
-      run: |
-        curl -X POST -H "Authorization: token ${{ secrets.GH_REPO_TOKEN }}" -H "Accept: application/vnd.github.everest-preview+json" -H "Content-Type: application/json" --data '{"event_type": "rebuild"}' https://api.github.com/repos/hathach/mynewt-tinyusb-example/dispatches
+
diff --git a/.gitmodules b/.gitmodules
index 83db9dfff..18b627bcf 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -19,3 +19,6 @@
 [submodule "hw/mcu/microchip"]
 	path = hw/mcu/microchip
 	url = https://github.com/hathach/microchip_driver.git
+[submodule "hw/mcu/nuvoton"]
+	path = hw/mcu/nuvoton
+	url = https://github.com/majbthrd/nuc_driver.git
\ No newline at end of file
diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index 20f4d9e26..0b52c4c5b 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -23,6 +23,10 @@
   * USBTMC class driver support with example
   * Various improvement e.g Zero-length packet, Lint setup 
   * Board support for STM32F070RB Nucleo, STM32F303 Discovery
+
+* **[Peter Lawrence](https://github.com/majbthrd)**
+  * Nuvoton NUC 121, 125, 126 device driver port
+  * Board support for NuTiny NUC121s, NUC125s, NUC126V
   
 * **[Scott Shawcroft](https://github.com/tannewt)**
   * SAMD21 and SAMD51 device driver port
diff --git a/README.md b/README.md
index 75d354004..eabf924b7 100644
--- a/README.md
+++ b/README.md
@@ -38,6 +38,7 @@ The stack supports the following MCUs
 - **Sony:** CXD56
 - **ST:** STM32 series: L0, F0, F1, F2, F3, F4, F7, H7 (device only)
 - **[ValentyUSB](https://github.com/im-tomu/valentyusb)** eptri
+- **Nuvoton:** NUC121/NUC125, NUC126
 
 [Here is the list of supported Boards](docs/boards.md) that can be used with provided examples.
 
diff --git a/docs/boards.md b/docs/boards.md
index 7006aae5d..399278e52 100644
--- a/docs/boards.md
+++ b/docs/boards.md
@@ -7,7 +7,7 @@ The board support code is only used for self-contained examples and testing. It
  
 ## Supported Boards
 
-This code base already had supported for a handful of following boards
+This code base already had supported for a handful of following boards (sorted alphabetically)
 
 ### MicroChip SAMD
 
@@ -26,6 +26,12 @@ This code base already had supported for a handful of following boards
 - [Nordic nRF52840 Dongle (aka pca10059)](https://www.nordicsemi.com/Software-and-Tools/Development-Kits/nRF52840-Dongle)
 - [Nordic nRF52833 Development Kit (aka pca10100)](https://www.nordicsemi.com/Software-and-Tools/Development-Kits/nRF52833-DK)
 
+### Nuvoton
+
+- [NuTiny NUC121S](https://direct.nuvoton.com/en/nutiny-nuc121s)
+- [NuTiny NUC125S](https://direct.nuvoton.com/en/nutiny-nuc125s)
+- [NuTiny NUC126V](https://direct.nuvoton.com/en/nutiny-nuc126v)
+
 ### NXP iMX RT
 
 - [MIMX RT1010 Evaluation Kit](https://www.nxp.com/design/development-boards/i.mx-evaluation-and-development-boards/i.mx-rt1010-evaluation-kit:MIMXRT1010-EVK)
diff --git a/examples/readme.md b/examples/readme.md
index dc4c563dd..897931b0e 100644
--- a/examples/readme.md
+++ b/examples/readme.md
@@ -12,7 +12,7 @@ $ cd tinyusb
 TinyUSB examples includes external repos aka submodules to provide low-level MCU peripheral's driver to compile with. Therefore we will firstly fetch those mcu driver repo by running this command in the top folder repo
 
 ```
-$ git submodule update --init --rescursive
+$ git submodule update --init --recursive
 ```
 
 It will takes a bit of time due to the number of supported MCUs, luckily we only need to do this once.
diff --git a/hw/bsp/mimxrt1010_evk/board.mk b/hw/bsp/mimxrt1010_evk/board.mk
index 24a3dbdcd..7b61cb241 100644
--- a/hw/bsp/mimxrt1010_evk/board.mk
+++ b/hw/bsp/mimxrt1010_evk/board.mk
@@ -11,7 +11,8 @@ CFLAGS += \
   -DCFG_TUSB_MCU=OPT_MCU_MIMXRT10XX
 
 # mcu driver cause following warnings
-CFLAGS += -Wno-error=unused-parameter -Wno-error=implicit-fallthrough=
+# CFLAGS += -Wno-error=unused-parameter -Wno-error=implicit-fallthrough=
+CFLAGS += -Wno-error=unused-parameter
 
 MCU_DIR = hw/mcu/nxp/sdk/devices/MIMXRT1011
 
diff --git a/hw/bsp/nutiny_nuc121s/board.mk b/hw/bsp/nutiny_nuc121s/board.mk
new file mode 100644
index 000000000..ec4966cb0
--- /dev/null
+++ b/hw/bsp/nutiny_nuc121s/board.mk
@@ -0,0 +1,55 @@
+CFLAGS += \
+  -flto \
+  -mthumb \
+  -mabi=aapcs-linux \
+  -mcpu=cortex-m0 \
+  -D__ARM_FEATURE_DSP=0 \
+  -DUSE_ASSERT=0 \
+  -DCFG_EXAMPLE_MSC_READONLY \
+  -DCFG_TUSB_MCU=OPT_MCU_NUC121
+
+# All source paths should be relative to the top level.
+LD_FILE = hw/bsp/nutiny_nuc121s/nuc121_flash.ld
+
+SRC_C += \
+  hw/mcu/nuvoton/nuc121_125/Device/Nuvoton/NUC121/Source/system_NUC121.c \
+  hw/mcu/nuvoton/nuc121_125/StdDriver/src/adc.c \
+  hw/mcu/nuvoton/nuc121_125/StdDriver/src/bpwm.c \
+  hw/mcu/nuvoton/nuc121_125/StdDriver/src/clk.c \
+  hw/mcu/nuvoton/nuc121_125/StdDriver/src/fmc.c \
+  hw/mcu/nuvoton/nuc121_125/StdDriver/src/gpio.c \
+  hw/mcu/nuvoton/nuc121_125/StdDriver/src/i2c.c \
+  hw/mcu/nuvoton/nuc121_125/StdDriver/src/pdma.c \
+  hw/mcu/nuvoton/nuc121_125/StdDriver/src/pwm.c \
+  hw/mcu/nuvoton/nuc121_125/StdDriver/src/spi_i2s.c \
+  hw/mcu/nuvoton/nuc121_125/StdDriver/src/sys.c \
+  hw/mcu/nuvoton/nuc121_125/StdDriver/src/timer.c \
+  hw/mcu/nuvoton/nuc121_125/StdDriver/src/uart.c \
+  hw/mcu/nuvoton/nuc121_125/StdDriver/src/usbd.c \
+  hw/mcu/nuvoton/nuc121_125/StdDriver/src/usci_i2c.c \
+  hw/mcu/nuvoton/nuc121_125/StdDriver/src/usci_spi.c \
+  hw/mcu/nuvoton/nuc121_125/StdDriver/src/usci_uart.c \
+  hw/mcu/nuvoton/nuc121_125/StdDriver/src/wdt.c \
+  hw/mcu/nuvoton/nuc121_125/StdDriver/src/wwdt.c
+
+SRC_S += \
+  hw/mcu/nuvoton/nuc121_125/Device/Nuvoton/NUC121/Source/GCC/startup_NUC121.S
+
+INC += \
+  $(TOP)/hw/mcu/nuvoton/nuc121_125/Device/Nuvoton/NUC121/Include \
+  $(TOP)/hw/mcu/nuvoton/nuc121_125/StdDriver/inc \
+  $(TOP)/hw/mcu/nuvoton/nuc121_125/CMSIS/Include
+
+# For TinyUSB port source
+VENDOR = nuvoton
+CHIP_FAMILY = nuc121
+
+# For freeRTOS port source
+FREERTOS_PORT = ARM_CM0
+
+# For flash-jlink target
+JLINK_DEVICE = NUC121SC2AE
+JLINK_IF = swd
+
+# flash using jlink
+flash: flash-jlink
diff --git a/hw/bsp/nutiny_nuc121s/nuc121_flash.ld b/hw/bsp/nutiny_nuc121s/nuc121_flash.ld
new file mode 100644
index 000000000..3966b276e
--- /dev/null
+++ b/hw/bsp/nutiny_nuc121s/nuc121_flash.ld
@@ -0,0 +1,195 @@
+/* Linker script to configure memory regions. */
+MEMORY
+{
+  FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 0x8000    /* 32k */
+  RAM (rwx)  : ORIGIN = 0x20000000, LENGTH = 0x2000    /* 8k  */
+}
+
+/* Library configurations */
+GROUP(libgcc.a libc.a libm.a libnosys.a)
+
+/* Linker script to place sections and symbol values. Should be used together
+ * with other linker script that defines memory regions FLASH and RAM.
+ * It references following symbols, which must be defined in code:
+ *   Reset_Handler : Entry of reset handler
+ *
+ * It defines following symbols, which code can use without definition:
+ *   __exidx_start
+ *   __exidx_end
+ *   __copy_table_start__
+ *   __copy_table_end__
+ *   __zero_table_start__
+ *   __zero_table_end__
+ *   __etext
+ *   __data_start__
+ *   __preinit_array_start
+ *   __preinit_array_end
+ *   __init_array_start
+ *   __init_array_end
+ *   __fini_array_start
+ *   __fini_array_end
+ *   __data_end__
+ *   __bss_start__
+ *   __bss_end__
+ *   __end__
+ *   end
+ *   __HeapLimit
+ *   __StackLimit
+ *   __StackTop
+ *   __stack
+ *   __Vectors_End
+ *   __Vectors_Size
+ */
+ENTRY(Reset_Handler)
+
+SECTIONS
+{
+	.text :
+	{
+		KEEP(*(.vectors))
+		__Vectors_End = .;
+		__Vectors_Size = __Vectors_End - __Vectors;
+		__end__ = .;
+
+		*(.text*)
+
+		KEEP(*(.init))
+		KEEP(*(.fini))
+
+		/* .ctors */
+		*crtbegin.o(.ctors)
+		*crtbegin?.o(.ctors)
+		*(EXCLUDE_FILE(*crtend?.o *crtend.o) .ctors)
+		*(SORT(.ctors.*))
+		*(.ctors)
+
+		/* .dtors */
+ 		*crtbegin.o(.dtors)
+ 		*crtbegin?.o(.dtors)
+ 		*(EXCLUDE_FILE(*crtend?.o *crtend.o) .dtors)
+ 		*(SORT(.dtors.*))
+ 		*(.dtors)
+        
+		*(.rodata*)
+
+		KEEP(*(.eh_frame*))
+	} > FLASH
+
+	.ARM.extab :
+	{
+		*(.ARM.extab* .gnu.linkonce.armextab.*)
+	} > FLASH
+
+	__exidx_start = .;
+	.ARM.exidx :
+	{
+		*(.ARM.exidx* .gnu.linkonce.armexidx.*)
+	} > FLASH
+	__exidx_end = .;
+
+	/* To copy multiple ROM to RAM sections,
+	 * uncomment .copy.table section and,
+	 * define __STARTUP_COPY_MULTIPLE in startup_ARMCMx.S */
+	/*
+	.copy.table :
+	{
+		. = ALIGN(4);
+		__copy_table_start__ = .;
+		LONG (__etext)
+		LONG (__data_start__)
+		LONG (__data_end__ - __data_start__)
+		LONG (__etext2)
+		LONG (__data2_start__)
+		LONG (__data2_end__ - __data2_start__)
+		__copy_table_end__ = .;
+	} > FLASH
+	*/
+
+	/* To clear multiple BSS sections,
+	 * uncomment .zero.table section and,
+	 * define __STARTUP_CLEAR_BSS_MULTIPLE in startup_ARMCMx.S */
+	/*
+	.zero.table :
+	{
+		. = ALIGN(4);
+		__zero_table_start__ = .;
+		LONG (__bss_start__)
+		LONG (__bss_end__ - __bss_start__)
+		LONG (__bss2_start__)
+		LONG (__bss2_end__ - __bss2_start__)
+		__zero_table_end__ = .;
+	} > FLASH
+	*/
+
+	__etext = .;
+
+	.data : AT (__etext)
+	{
+		__data_start__ = .;
+		*(vtable)
+		*(.data*)
+
+		. = ALIGN(4);
+		/* preinit data */
+		PROVIDE_HIDDEN (__preinit_array_start = .);
+		KEEP(*(.preinit_array))
+		PROVIDE_HIDDEN (__preinit_array_end = .);
+
+		. = ALIGN(4);
+		/* init data */
+		PROVIDE_HIDDEN (__init_array_start = .);
+		KEEP(*(SORT(.init_array.*)))
+		KEEP(*(.init_array))
+		PROVIDE_HIDDEN (__init_array_end = .);
+
+
+		. = ALIGN(4);
+		/* finit data */
+		PROVIDE_HIDDEN (__fini_array_start = .);
+		KEEP(*(SORT(.fini_array.*)))
+		KEEP(*(.fini_array))
+		PROVIDE_HIDDEN (__fini_array_end = .);
+
+		KEEP(*(.jcr*))
+		. = ALIGN(4);
+		/* All data end */
+		__data_end__ = .;
+
+	} > RAM
+
+	.bss :
+	{
+		. = ALIGN(4);
+		__bss_start__ = .;
+		*(.bss*)
+		*(COMMON)
+		. = ALIGN(4);
+		__bss_end__ = .;
+	} > RAM
+
+	.heap (COPY):
+	{
+		__HeapBase = .;
+		__end__ = .;
+		end = __end__;
+		KEEP(*(.heap*))
+		__HeapLimit = .;
+	} > RAM
+
+	/* .stack_dummy section doesn't contains any symbols. It is only
+	 * used for linker to calculate size of stack sections, and assign
+	 * values to stack symbols later */
+	.stack_dummy (COPY):
+	{
+		KEEP(*(.stack*))
+	} > RAM
+
+	/* Set stack top to end of RAM, and stack limit move down by
+	 * size of stack_dummy section */
+	__StackTop = ORIGIN(RAM) + LENGTH(RAM);
+	__StackLimit = __StackTop - SIZEOF(.stack_dummy);
+	PROVIDE(__stack = __StackTop);
+
+	/* Check if data + heap + stack exceeds RAM limit */
+	ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed with stack")
+}
diff --git a/hw/bsp/nutiny_nuc121s/nutiny_nuc121.c b/hw/bsp/nutiny_nuc121s/nutiny_nuc121.c
new file mode 100644
index 000000000..51ca28a82
--- /dev/null
+++ b/hw/bsp/nutiny_nuc121s/nutiny_nuc121.c
@@ -0,0 +1,102 @@
+/* 
+ * 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.
+ *
+ * This file is part of the TinyUSB stack.
+ */
+
+#include "bsp/board.h"
+#include "NuMicro.h"
+#include "clk.h"
+#include "sys.h"
+
+void board_init(void)
+{
+  /* Unlock protected registers */
+  SYS_UnlockReg();
+
+  /*---------------------------------------------------------------------------------------------------------*/
+  /* Init System Clock                                                                                       */
+  /*---------------------------------------------------------------------------------------------------------*/
+
+  /* Enable Internal HIRC 48 MHz clock */
+  CLK_EnableXtalRC(CLK_PWRCTL_HIRCEN);
+
+  /* Waiting for Internal RC clock ready */
+  CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk);
+
+  /* Switch HCLK clock source to Internal HIRC and HCLK source divide 1 */
+  CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HIRC, CLK_CLKDIV0_HCLK(1));
+
+  /* Enable module clock */
+  CLK_EnableModuleClock(USBD_MODULE);
+
+  /* Select module clock source */
+  CLK_SetModuleClock(USBD_MODULE, CLK_CLKSEL3_USBDSEL_HIRC, CLK_CLKDIV0_USB(1));
+
+  /* Enable module clock */
+  CLK_EnableModuleClock(USBD_MODULE);
+
+#if CFG_TUSB_OS  == OPT_OS_NONE
+  // 1ms tick timer
+  SysTick_Config(48000000 / 1000);
+#endif
+}
+
+#if CFG_TUSB_OS  == OPT_OS_NONE
+volatile uint32_t system_ticks = 0;
+void SysTick_Handler (void)
+{
+  system_ticks++;
+}
+
+uint32_t board_millis(void)
+{
+  return system_ticks;
+}
+#endif
+
+//--------------------------------------------------------------------+
+// Board porting API
+//--------------------------------------------------------------------+
+
+void board_led_write(bool state)
+{
+  (void)(state);
+}
+
+uint32_t board_button_read(void)
+{
+  return 0;
+}
+
+int board_uart_read(uint8_t* buf, int len)
+{
+  (void) buf; (void) len;
+  return 0;
+}
+
+int board_uart_write(void const * buf, int len)
+{
+  (void) buf; (void) len;
+  return 0;
+}
diff --git a/hw/bsp/nutiny_nuc125s/board.mk b/hw/bsp/nutiny_nuc125s/board.mk
new file mode 100644
index 000000000..6329ca7cf
--- /dev/null
+++ b/hw/bsp/nutiny_nuc125s/board.mk
@@ -0,0 +1,38 @@
+CFLAGS += \
+  -flto \
+  -mthumb \
+  -mabi=aapcs-linux \
+  -mcpu=cortex-m0 \
+  -D__ARM_FEATURE_DSP=0 \
+  -DUSE_ASSERT=0 \
+  -DCFG_EXAMPLE_MSC_READONLY \
+  -DCFG_TUSB_MCU=OPT_MCU_NUC121
+
+# All source paths should be relative to the top level.
+LD_FILE = hw/bsp/nutiny_nuc125s/nuc125_flash.ld
+
+SRC_C += \
+  hw/mcu/nuvoton/nuc121_125/Device/Nuvoton/NUC121/Source/system_NUC121.c \
+  hw/mcu/nuvoton/nuc121_125/StdDriver/src/clk.c
+
+SRC_S += \
+  hw/mcu/nuvoton/nuc121_125/Device/Nuvoton/NUC121/Source/GCC/startup_NUC121.S
+
+INC += \
+  $(TOP)/hw/mcu/nuvoton/nuc121_125/Device/Nuvoton/NUC121/Include \
+  $(TOP)/hw/mcu/nuvoton/nuc121_125/StdDriver/inc \
+  $(TOP)/hw/mcu/nuvoton/nuc121_125/CMSIS/Include
+
+# For TinyUSB port source
+VENDOR = nuvoton
+CHIP_FAMILY = nuc121
+
+# For freeRTOS port source
+FREERTOS_PORT = ARM_CM0
+
+# For flash-jlink target
+JLINK_DEVICE = NUC125SC2AE
+JLINK_IF = swd
+
+# flash using jlink
+flash: flash-jlink
diff --git a/hw/bsp/nutiny_nuc125s/nuc125_flash.ld b/hw/bsp/nutiny_nuc125s/nuc125_flash.ld
new file mode 100644
index 000000000..3966b276e
--- /dev/null
+++ b/hw/bsp/nutiny_nuc125s/nuc125_flash.ld
@@ -0,0 +1,195 @@
+/* Linker script to configure memory regions. */
+MEMORY
+{
+  FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 0x8000    /* 32k */
+  RAM (rwx)  : ORIGIN = 0x20000000, LENGTH = 0x2000    /* 8k  */
+}
+
+/* Library configurations */
+GROUP(libgcc.a libc.a libm.a libnosys.a)
+
+/* Linker script to place sections and symbol values. Should be used together
+ * with other linker script that defines memory regions FLASH and RAM.
+ * It references following symbols, which must be defined in code:
+ *   Reset_Handler : Entry of reset handler
+ *
+ * It defines following symbols, which code can use without definition:
+ *   __exidx_start
+ *   __exidx_end
+ *   __copy_table_start__
+ *   __copy_table_end__
+ *   __zero_table_start__
+ *   __zero_table_end__
+ *   __etext
+ *   __data_start__
+ *   __preinit_array_start
+ *   __preinit_array_end
+ *   __init_array_start
+ *   __init_array_end
+ *   __fini_array_start
+ *   __fini_array_end
+ *   __data_end__
+ *   __bss_start__
+ *   __bss_end__
+ *   __end__
+ *   end
+ *   __HeapLimit
+ *   __StackLimit
+ *   __StackTop
+ *   __stack
+ *   __Vectors_End
+ *   __Vectors_Size
+ */
+ENTRY(Reset_Handler)
+
+SECTIONS
+{
+	.text :
+	{
+		KEEP(*(.vectors))
+		__Vectors_End = .;
+		__Vectors_Size = __Vectors_End - __Vectors;
+		__end__ = .;
+
+		*(.text*)
+
+		KEEP(*(.init))
+		KEEP(*(.fini))
+
+		/* .ctors */
+		*crtbegin.o(.ctors)
+		*crtbegin?.o(.ctors)
+		*(EXCLUDE_FILE(*crtend?.o *crtend.o) .ctors)
+		*(SORT(.ctors.*))
+		*(.ctors)
+
+		/* .dtors */
+ 		*crtbegin.o(.dtors)
+ 		*crtbegin?.o(.dtors)
+ 		*(EXCLUDE_FILE(*crtend?.o *crtend.o) .dtors)
+ 		*(SORT(.dtors.*))
+ 		*(.dtors)
+        
+		*(.rodata*)
+
+		KEEP(*(.eh_frame*))
+	} > FLASH
+
+	.ARM.extab :
+	{
+		*(.ARM.extab* .gnu.linkonce.armextab.*)
+	} > FLASH
+
+	__exidx_start = .;
+	.ARM.exidx :
+	{
+		*(.ARM.exidx* .gnu.linkonce.armexidx.*)
+	} > FLASH
+	__exidx_end = .;
+
+	/* To copy multiple ROM to RAM sections,
+	 * uncomment .copy.table section and,
+	 * define __STARTUP_COPY_MULTIPLE in startup_ARMCMx.S */
+	/*
+	.copy.table :
+	{
+		. = ALIGN(4);
+		__copy_table_start__ = .;
+		LONG (__etext)
+		LONG (__data_start__)
+		LONG (__data_end__ - __data_start__)
+		LONG (__etext2)
+		LONG (__data2_start__)
+		LONG (__data2_end__ - __data2_start__)
+		__copy_table_end__ = .;
+	} > FLASH
+	*/
+
+	/* To clear multiple BSS sections,
+	 * uncomment .zero.table section and,
+	 * define __STARTUP_CLEAR_BSS_MULTIPLE in startup_ARMCMx.S */
+	/*
+	.zero.table :
+	{
+		. = ALIGN(4);
+		__zero_table_start__ = .;
+		LONG (__bss_start__)
+		LONG (__bss_end__ - __bss_start__)
+		LONG (__bss2_start__)
+		LONG (__bss2_end__ - __bss2_start__)
+		__zero_table_end__ = .;
+	} > FLASH
+	*/
+
+	__etext = .;
+
+	.data : AT (__etext)
+	{
+		__data_start__ = .;
+		*(vtable)
+		*(.data*)
+
+		. = ALIGN(4);
+		/* preinit data */
+		PROVIDE_HIDDEN (__preinit_array_start = .);
+		KEEP(*(.preinit_array))
+		PROVIDE_HIDDEN (__preinit_array_end = .);
+
+		. = ALIGN(4);
+		/* init data */
+		PROVIDE_HIDDEN (__init_array_start = .);
+		KEEP(*(SORT(.init_array.*)))
+		KEEP(*(.init_array))
+		PROVIDE_HIDDEN (__init_array_end = .);
+
+
+		. = ALIGN(4);
+		/* finit data */
+		PROVIDE_HIDDEN (__fini_array_start = .);
+		KEEP(*(SORT(.fini_array.*)))
+		KEEP(*(.fini_array))
+		PROVIDE_HIDDEN (__fini_array_end = .);
+
+		KEEP(*(.jcr*))
+		. = ALIGN(4);
+		/* All data end */
+		__data_end__ = .;
+
+	} > RAM
+
+	.bss :
+	{
+		. = ALIGN(4);
+		__bss_start__ = .;
+		*(.bss*)
+		*(COMMON)
+		. = ALIGN(4);
+		__bss_end__ = .;
+	} > RAM
+
+	.heap (COPY):
+	{
+		__HeapBase = .;
+		__end__ = .;
+		end = __end__;
+		KEEP(*(.heap*))
+		__HeapLimit = .;
+	} > RAM
+
+	/* .stack_dummy section doesn't contains any symbols. It is only
+	 * used for linker to calculate size of stack sections, and assign
+	 * values to stack symbols later */
+	.stack_dummy (COPY):
+	{
+		KEEP(*(.stack*))
+	} > RAM
+
+	/* Set stack top to end of RAM, and stack limit move down by
+	 * size of stack_dummy section */
+	__StackTop = ORIGIN(RAM) + LENGTH(RAM);
+	__StackLimit = __StackTop - SIZEOF(.stack_dummy);
+	PROVIDE(__stack = __StackTop);
+
+	/* Check if data + heap + stack exceeds RAM limit */
+	ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed with stack")
+}
diff --git a/hw/bsp/nutiny_nuc125s/nutiny_nuc125.c b/hw/bsp/nutiny_nuc125s/nutiny_nuc125.c
new file mode 100644
index 000000000..51ca28a82
--- /dev/null
+++ b/hw/bsp/nutiny_nuc125s/nutiny_nuc125.c
@@ -0,0 +1,102 @@
+/* 
+ * 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.
+ *
+ * This file is part of the TinyUSB stack.
+ */
+
+#include "bsp/board.h"
+#include "NuMicro.h"
+#include "clk.h"
+#include "sys.h"
+
+void board_init(void)
+{
+  /* Unlock protected registers */
+  SYS_UnlockReg();
+
+  /*---------------------------------------------------------------------------------------------------------*/
+  /* Init System Clock                                                                                       */
+  /*---------------------------------------------------------------------------------------------------------*/
+
+  /* Enable Internal HIRC 48 MHz clock */
+  CLK_EnableXtalRC(CLK_PWRCTL_HIRCEN);
+
+  /* Waiting for Internal RC clock ready */
+  CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk);
+
+  /* Switch HCLK clock source to Internal HIRC and HCLK source divide 1 */
+  CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HIRC, CLK_CLKDIV0_HCLK(1));
+
+  /* Enable module clock */
+  CLK_EnableModuleClock(USBD_MODULE);
+
+  /* Select module clock source */
+  CLK_SetModuleClock(USBD_MODULE, CLK_CLKSEL3_USBDSEL_HIRC, CLK_CLKDIV0_USB(1));
+
+  /* Enable module clock */
+  CLK_EnableModuleClock(USBD_MODULE);
+
+#if CFG_TUSB_OS  == OPT_OS_NONE
+  // 1ms tick timer
+  SysTick_Config(48000000 / 1000);
+#endif
+}
+
+#if CFG_TUSB_OS  == OPT_OS_NONE
+volatile uint32_t system_ticks = 0;
+void SysTick_Handler (void)
+{
+  system_ticks++;
+}
+
+uint32_t board_millis(void)
+{
+  return system_ticks;
+}
+#endif
+
+//--------------------------------------------------------------------+
+// Board porting API
+//--------------------------------------------------------------------+
+
+void board_led_write(bool state)
+{
+  (void)(state);
+}
+
+uint32_t board_button_read(void)
+{
+  return 0;
+}
+
+int board_uart_read(uint8_t* buf, int len)
+{
+  (void) buf; (void) len;
+  return 0;
+}
+
+int board_uart_write(void const * buf, int len)
+{
+  (void) buf; (void) len;
+  return 0;
+}
diff --git a/hw/bsp/nutiny_nuc126v/board.mk b/hw/bsp/nutiny_nuc126v/board.mk
new file mode 100644
index 000000000..d38e6c4d5
--- /dev/null
+++ b/hw/bsp/nutiny_nuc126v/board.mk
@@ -0,0 +1,59 @@
+CFLAGS += \
+  -flto \
+  -mthumb \
+  -mabi=aapcs-linux \
+  -mcpu=cortex-m0 \
+  -D__ARM_FEATURE_DSP=0 \
+  -DUSE_ASSERT=0 \
+  -D__CORTEX_SC=0 \
+  -DCFG_TUSB_MCU=OPT_MCU_NUC126
+
+# All source paths should be relative to the top level.
+LD_FILE = hw/bsp/nutiny_nuc126v/nuc126_flash.ld
+
+SRC_C += \
+  hw/mcu/nuvoton/nuc126/Device/Nuvoton/NUC126/Source/system_NUC126.c \
+  hw/mcu/nuvoton/nuc126/StdDriver/src/acmp.c \
+  hw/mcu/nuvoton/nuc126/StdDriver/src/adc.c \
+  hw/mcu/nuvoton/nuc126/StdDriver/src/clk.c \
+  hw/mcu/nuvoton/nuc126/StdDriver/src/crc.c \
+  hw/mcu/nuvoton/nuc126/StdDriver/src/ebi.c \
+  hw/mcu/nuvoton/nuc126/StdDriver/src/fmc.c \
+  hw/mcu/nuvoton/nuc126/StdDriver/src/gpio.c \
+  hw/mcu/nuvoton/nuc126/StdDriver/src/pdma.c \
+  hw/mcu/nuvoton/nuc126/StdDriver/src/pwm.c \
+  hw/mcu/nuvoton/nuc126/StdDriver/src/rtc.c \
+  hw/mcu/nuvoton/nuc126/StdDriver/src/sc.c \
+  hw/mcu/nuvoton/nuc126/StdDriver/src/scuart.c \
+  hw/mcu/nuvoton/nuc126/StdDriver/src/spi.c \
+  hw/mcu/nuvoton/nuc126/StdDriver/src/sys.c \
+  hw/mcu/nuvoton/nuc126/StdDriver/src/timer.c \
+  hw/mcu/nuvoton/nuc126/StdDriver/src/timer_pwm.c \
+  hw/mcu/nuvoton/nuc126/StdDriver/src/uart.c \
+  hw/mcu/nuvoton/nuc126/StdDriver/src/usbd.c \
+  hw/mcu/nuvoton/nuc126/StdDriver/src/usci_spi.c \
+  hw/mcu/nuvoton/nuc126/StdDriver/src/usci_uart.c \
+  hw/mcu/nuvoton/nuc126/StdDriver/src/wdt.c \
+  hw/mcu/nuvoton/nuc126/StdDriver/src/wwdt.c
+
+SRC_S += \
+  hw/mcu/nuvoton/nuc126/Device/Nuvoton/NUC126/Source/GCC/startup_NUC126.S
+
+INC += \
+  $(TOP)/hw/mcu/nuvoton/nuc126/Device/Nuvoton/NUC126/Include \
+  $(TOP)/hw/mcu/nuvoton/nuc126/StdDriver/inc \
+  $(TOP)/hw/mcu/nuvoton/nuc126/CMSIS/Include
+
+# For TinyUSB port source
+VENDOR = nuvoton
+CHIP_FAMILY = nuc121
+
+# For freeRTOS port source
+FREERTOS_PORT = ARM_CM0
+
+# For flash-jlink target
+JLINK_DEVICE = NUC126VG4AE
+JLINK_IF = swd
+
+# flash using jlink
+flash: flash-jlink
diff --git a/hw/bsp/nutiny_nuc126v/nuc126_flash.ld b/hw/bsp/nutiny_nuc126v/nuc126_flash.ld
new file mode 100644
index 000000000..b23890b4b
--- /dev/null
+++ b/hw/bsp/nutiny_nuc126v/nuc126_flash.ld
@@ -0,0 +1,195 @@
+/* Linker script to configure memory regions. */
+MEMORY
+{
+  FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 0x40000   /* 256k */
+  RAM (rwx)  : ORIGIN = 0x20000000, LENGTH = 0x5000    /*  20k */
+}
+
+/* Library configurations */
+GROUP(libgcc.a libc.a libm.a libnosys.a)
+
+/* Linker script to place sections and symbol values. Should be used together
+ * with other linker script that defines memory regions FLASH and RAM.
+ * It references following symbols, which must be defined in code:
+ *   Reset_Handler : Entry of reset handler
+ *
+ * It defines following symbols, which code can use without definition:
+ *   __exidx_start
+ *   __exidx_end
+ *   __copy_table_start__
+ *   __copy_table_end__
+ *   __zero_table_start__
+ *   __zero_table_end__
+ *   __etext
+ *   __data_start__
+ *   __preinit_array_start
+ *   __preinit_array_end
+ *   __init_array_start
+ *   __init_array_end
+ *   __fini_array_start
+ *   __fini_array_end
+ *   __data_end__
+ *   __bss_start__
+ *   __bss_end__
+ *   __end__
+ *   end
+ *   __HeapLimit
+ *   __StackLimit
+ *   __StackTop
+ *   __stack
+ *   __Vectors_End
+ *   __Vectors_Size
+ */
+ENTRY(Reset_Handler)
+
+SECTIONS
+{
+	.text :
+	{
+		KEEP(*(.vectors))
+		__Vectors_End = .;
+		__Vectors_Size = __Vectors_End - __Vectors;
+		__end__ = .;
+
+		*(.text*)
+
+		KEEP(*(.init))
+		KEEP(*(.fini))
+
+		/* .ctors */
+		*crtbegin.o(.ctors)
+		*crtbegin?.o(.ctors)
+		*(EXCLUDE_FILE(*crtend?.o *crtend.o) .ctors)
+		*(SORT(.ctors.*))
+		*(.ctors)
+
+		/* .dtors */
+ 		*crtbegin.o(.dtors)
+ 		*crtbegin?.o(.dtors)
+ 		*(EXCLUDE_FILE(*crtend?.o *crtend.o) .dtors)
+ 		*(SORT(.dtors.*))
+ 		*(.dtors)
+
+		*(.rodata*)
+
+		KEEP(*(.eh_frame*))
+	} > FLASH
+
+	.ARM.extab :
+	{
+		*(.ARM.extab* .gnu.linkonce.armextab.*)
+	} > FLASH
+
+	__exidx_start = .;
+	.ARM.exidx :
+	{
+		*(.ARM.exidx* .gnu.linkonce.armexidx.*)
+	} > FLASH
+	__exidx_end = .;
+
+	/* To copy multiple ROM to RAM sections,
+	 * uncomment .copy.table section and,
+	 * define __STARTUP_COPY_MULTIPLE in startup_ARMCMx.S */
+	/*
+	.copy.table :
+	{
+		. = ALIGN(4);
+		__copy_table_start__ = .;
+		LONG (__etext)
+		LONG (__data_start__)
+		LONG (__data_end__ - __data_start__)
+		LONG (__etext2)
+		LONG (__data2_start__)
+		LONG (__data2_end__ - __data2_start__)
+		__copy_table_end__ = .;
+	} > FLASH
+	*/
+
+	/* To clear multiple BSS sections,
+	 * uncomment .zero.table section and,
+	 * define __STARTUP_CLEAR_BSS_MULTIPLE in startup_ARMCMx.S */
+	/*
+	.zero.table :
+	{
+		. = ALIGN(4);
+		__zero_table_start__ = .;
+		LONG (__bss_start__)
+		LONG (__bss_end__ - __bss_start__)
+		LONG (__bss2_start__)
+		LONG (__bss2_end__ - __bss2_start__)
+		__zero_table_end__ = .;
+	} > FLASH
+	*/
+
+	__etext = .;
+
+	.data : AT (__etext)
+	{
+		__data_start__ = .;
+		*(vtable)
+		*(.data*)
+
+		. = ALIGN(4);
+		/* preinit data */
+		PROVIDE_HIDDEN (__preinit_array_start = .);
+		KEEP(*(.preinit_array))
+		PROVIDE_HIDDEN (__preinit_array_end = .);
+
+		. = ALIGN(4);
+		/* init data */
+		PROVIDE_HIDDEN (__init_array_start = .);
+		KEEP(*(SORT(.init_array.*)))
+		KEEP(*(.init_array))
+		PROVIDE_HIDDEN (__init_array_end = .);
+
+
+		. = ALIGN(4);
+		/* finit data */
+		PROVIDE_HIDDEN (__fini_array_start = .);
+		KEEP(*(SORT(.fini_array.*)))
+		KEEP(*(.fini_array))
+		PROVIDE_HIDDEN (__fini_array_end = .);
+
+		KEEP(*(.jcr*))
+		. = ALIGN(4);
+		/* All data end */
+		__data_end__ = .;
+
+	} > RAM
+
+	.bss :
+	{
+		. = ALIGN(4);
+		__bss_start__ = .;
+		*(.bss*)
+		*(COMMON)
+		. = ALIGN(4);
+		__bss_end__ = .;
+	} > RAM
+
+	.heap (COPY):
+	{
+		__HeapBase = .;
+		__end__ = .;
+		end = __end__;
+		KEEP(*(.heap*))
+		__HeapLimit = .;
+	} > RAM
+
+	/* .stack_dummy section doesn't contains any symbols. It is only
+	 * used for linker to calculate size of stack sections, and assign
+	 * values to stack symbols later */
+	.stack_dummy (COPY):
+	{
+		KEEP(*(.stack*))
+	} > RAM
+
+	/* Set stack top to end of RAM, and stack limit move down by
+	 * size of stack_dummy section */
+	__StackTop = ORIGIN(RAM) + LENGTH(RAM);
+	__StackLimit = __StackTop - SIZEOF(.stack_dummy);
+	PROVIDE(__stack = __StackTop);
+
+	/* Check if data + heap + stack exceeds RAM limit */
+	ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed with stack")
+}
diff --git a/hw/bsp/nutiny_nuc126v/nutiny_nuc126.c b/hw/bsp/nutiny_nuc126v/nutiny_nuc126.c
new file mode 100644
index 000000000..0ce787d3e
--- /dev/null
+++ b/hw/bsp/nutiny_nuc126v/nutiny_nuc126.c
@@ -0,0 +1,133 @@
+/* 
+ * 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.
+ *
+ * This file is part of the TinyUSB stack.
+ */
+
+#include "bsp/board.h"
+#include "NuMicro.h"
+#include "clk.h"
+#include "sys.h"
+
+#define CRYSTAL_LESS /* system will be 48MHz when defined, otherwise, system is 72MHz */
+#define HIRC48_AUTO_TRIM    SYS_IRCTCTL1_REFCKSEL_Msk | (1UL << SYS_IRCTCTL1_LOOPSEL_Pos) | (2UL << SYS_IRCTCTL1_FREQSEL_Pos)
+#define TRIM_INIT           (SYS_BASE+0x118)
+
+void board_init(void)
+{
+  /* Unlock protected registers */
+  SYS_UnlockReg();
+
+  /*---------------------------------------------------------------------------------------------------------*/
+  /* Init System Clock                                                                                       */
+  /*---------------------------------------------------------------------------------------------------------*/
+
+  /* Enable Internal RC 22.1184 MHz clock */
+  CLK_EnableXtalRC(CLK_PWRCTL_HIRCEN_Msk);
+
+  /* Waiting for Internal RC clock ready */
+  CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk);
+
+  /* Switch HCLK clock source to Internal RC and HCLK source divide 1 */
+  CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HIRC, CLK_CLKDIV0_HCLK(1));
+
+#ifndef CRYSTAL_LESS
+  /* Enable external XTAL 12 MHz clock */
+  CLK_EnableXtalRC(CLK_PWRCTL_HXTEN_Msk);
+
+  /* Waiting for external XTAL clock ready */
+  CLK_WaitClockReady(CLK_STATUS_HXTSTB_Msk);
+
+  /* Set core clock */
+  CLK_SetCoreClock(72000000);
+
+  /* Use HIRC as UART clock source */
+  CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UARTSEL_HIRC, CLK_CLKDIV0_UART(1));
+
+  /* Use PLL as USB clock source */
+  CLK_SetModuleClock(USBD_MODULE, CLK_CLKSEL3_USBDSEL_PLL, CLK_CLKDIV0_USB(3));
+
+#else
+  /* Enable Internal RC 48MHz clock */
+  CLK_EnableXtalRC(CLK_PWRCTL_HIRC48EN_Msk);
+
+  /* Waiting for Internal RC clock ready */
+  CLK_WaitClockReady(CLK_STATUS_HIRC48STB_Msk);
+
+  /* Switch HCLK clock source to Internal RC and HCLK source divide 1 */
+  CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HIRC48, CLK_CLKDIV0_HCLK(1));
+
+  /* Use HIRC as UART clock source */
+  CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UARTSEL_HIRC, CLK_CLKDIV0_UART(1));
+
+  /* Use HIRC48 as USB clock source */
+  CLK_SetModuleClock(USBD_MODULE, CLK_CLKSEL3_USBDSEL_HIRC48, CLK_CLKDIV0_USB(1));
+#endif
+
+  /* Enable module clock */
+  CLK_EnableModuleClock(USBD_MODULE);
+
+#if CFG_TUSB_OS  == OPT_OS_NONE
+  // 1ms tick timer
+  SysTick_Config(48000000 / 1000);
+#endif
+}
+
+#if CFG_TUSB_OS  == OPT_OS_NONE
+volatile uint32_t system_ticks = 0;
+void SysTick_Handler (void)
+{
+  system_ticks++;
+}
+
+uint32_t board_millis(void)
+{
+  return system_ticks;
+}
+#endif
+
+//--------------------------------------------------------------------+
+// Board porting API
+//--------------------------------------------------------------------+
+
+void board_led_write(bool state)
+{
+  (void)(state);
+}
+
+uint32_t board_button_read(void)
+{
+  return 0;
+}
+
+int board_uart_read(uint8_t* buf, int len)
+{
+  (void) buf; (void) len;
+  return 0;
+}
+
+int board_uart_write(void const * buf, int len)
+{
+  (void) buf; (void) len;
+  return 0;
+}
diff --git a/hw/bsp/teensy_40/board.h b/hw/bsp/teensy_40/board.h
new file mode 100644
index 000000000..c5338e274
--- /dev/null
+++ b/hw/bsp/teensy_40/board.h
@@ -0,0 +1,36 @@
+/* 
+ * 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.
+ *
+ * This file is part of the TinyUSB stack.
+ */
+
+
+#ifndef BOARD_H_
+#define BOARD_H_
+
+
+// required since iMX RT10xx SDK include this file for board size
+#define BOARD_FLASH_SIZE (2 * 1024 * 1024)
+
+
+#endif /* BOARD_H_ */
diff --git a/hw/bsp/teensy_40/board.mk b/hw/bsp/teensy_40/board.mk
new file mode 100644
index 000000000..4bfc48bbf
--- /dev/null
+++ b/hw/bsp/teensy_40/board.mk
@@ -0,0 +1,53 @@
+CFLAGS += \
+  -mthumb \
+  -mabi=aapcs \
+  -mcpu=cortex-m7 \
+  -mfloat-abi=hard \
+  -mfpu=fpv5-d16 \
+  -D__ARMVFP__=0 -D__ARMFPV5__=0\
+  -DCPU_MIMXRT1062DVL6A \
+  -DXIP_EXTERNAL_FLASH=1 \
+  -DXIP_BOOT_HEADER_ENABLE=1 \
+  -DCFG_TUSB_MCU=OPT_MCU_MIMXRT10XX
+
+# mcu driver cause following warnings
+#CFLAGS += -Wno-error=float-equal -Wno-error=nested-externs
+CFLAGS += -Wno-error=unused-parameter
+
+MCU_DIR = hw/mcu/nxp/sdk/devices/MIMXRT1062
+
+# All source paths should be relative to the top level.
+LD_FILE = $(MCU_DIR)/gcc/MIMXRT1062xxxxx_flexspi_nor.ld
+
+SRC_C += \
+	$(MCU_DIR)/system_MIMXRT1062.c \
+	$(MCU_DIR)/xip/fsl_flexspi_nor_boot.c \
+	$(MCU_DIR)/project_template/clock_config.c \
+	$(MCU_DIR)/drivers/fsl_clock.c \
+	$(MCU_DIR)/drivers/fsl_gpio.c \
+	$(MCU_DIR)/drivers/fsl_common.c \
+	$(MCU_DIR)/drivers/fsl_lpuart.c
+
+INC += \
+	$(TOP)/hw/bsp/$(BOARD) \
+	$(TOP)/$(MCU_DIR)/../../CMSIS/Include \
+	$(TOP)/$(MCU_DIR) \
+	$(TOP)/$(MCU_DIR)/drivers \
+	$(TOP)/$(MCU_DIR)/project_template \
+
+SRC_S += $(MCU_DIR)/gcc/startup_MIMXRT1062.S
+
+# For TinyUSB port source
+VENDOR = nxp
+CHIP_FAMILY = transdimension
+
+# For freeRTOS port source
+FREERTOS_PORT = ARM_CM7
+
+# For flash-jlink target
+JLINK_DEVICE = MIMXRT1062xxx6A
+JLINK_IF = swd
+
+# flash by copying bin file to DAP Mass Storage
+flash: $(BUILD)/$(BOARD)-firmware.bin
+	cp $< /media/$(USER)/RT1060-EVK/
diff --git a/hw/bsp/teensy_40/teensy40.c b/hw/bsp/teensy_40/teensy40.c
new file mode 100644
index 000000000..9c905dbbb
--- /dev/null
+++ b/hw/bsp/teensy_40/teensy40.c
@@ -0,0 +1,184 @@
+/* 
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018, hathach (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.
+ */
+
+#include "../board.h"
+#include "fsl_device_registers.h"
+#include "fsl_gpio.h"
+#include "fsl_iomuxc.h"
+#include "fsl_clock.h"
+#include "fsl_lpuart.h"
+
+#include "clock_config.h"
+
+#define LED_PINMUX            IOMUXC_GPIO_B0_03_GPIO2_IO03 // D13
+#define LED_PORT              GPIO2
+#define LED_PIN               3
+#define LED_STATE_ON          0
+
+// no button
+#define BUTTON_PINMUX         IOMUXC_GPIO_B0_01_GPIO2_IO01 // D12
+#define BUTTON_PORT           GPIO2
+#define BUTTON_PIN            1
+#define BUTTON_STATE_ACTIVE   0
+
+// UART
+#define UART_PORT             LPUART6
+#define UART_RX_PINMUX        IOMUXC_GPIO_AD_B0_03_LPUART6_RX  // D0
+#define UART_TX_PINMUX        IOMUXC_GPIO_AD_B0_02_LPUART6_TX  // D1
+
+const uint8_t dcd_data[] = { 0x00 };
+
+void board_init(void)
+{
+  // Init clock
+  BOARD_BootClockRUN();
+  SystemCoreClockUpdate();
+
+  // Enable IOCON clock
+  CLOCK_EnableClock(kCLOCK_Iomuxc);
+
+#if CFG_TUSB_OS == OPT_OS_NONE
+  // 1ms tick timer
+  SysTick_Config(SystemCoreClock / 1000);
+#elif CFG_TUSB_OS == OPT_OS_FREERTOS
+  // If freeRTOS is used, IRQ priority is limit by max syscall ( smaller is higher )
+//  NVIC_SetPriority(USB0_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY );
+#endif
+
+  // LED
+  IOMUXC_SetPinMux( LED_PINMUX, 0U);
+  IOMUXC_SetPinConfig( LED_PINMUX, 0x10B0U);
+
+  gpio_pin_config_t led_config = { kGPIO_DigitalOutput, 0, kGPIO_NoIntmode };
+  GPIO_PinInit(LED_PORT, LED_PIN, &led_config);
+  board_led_write(true);
+
+  // Button
+  IOMUXC_SetPinMux( BUTTON_PINMUX, 0U);
+  gpio_pin_config_t button_config = { kGPIO_DigitalInput, 0, kGPIO_IntRisingEdge, };
+  GPIO_PinInit(BUTTON_PORT, BUTTON_PIN, &button_config);
+
+  // UART
+  IOMUXC_SetPinMux( UART_TX_PINMUX, 0U);
+  IOMUXC_SetPinMux( UART_RX_PINMUX, 0U);
+  IOMUXC_SetPinConfig( UART_TX_PINMUX, 0x10B0u);
+  IOMUXC_SetPinConfig( UART_RX_PINMUX, 0x10B0u);
+
+  lpuart_config_t uart_config;
+  LPUART_GetDefaultConfig(&uart_config);
+  uart_config.baudRate_Bps = CFG_BOARD_UART_BAUDRATE;
+  uart_config.enableTx = true;
+  uart_config.enableRx = true;
+  LPUART_Init(UART_PORT, &uart_config, (CLOCK_GetPllFreq(kCLOCK_PllUsb1) / 6U) / (CLOCK_GetDiv(kCLOCK_UartDiv) + 1U));
+
+  //------------- USB0 -------------//
+  // Clock
+  CLOCK_EnableUsbhs0PhyPllClock(kCLOCK_Usbphy480M, 480000000U);
+  CLOCK_EnableUsbhs0Clock(kCLOCK_Usb480M, 480000000U);
+
+  USBPHY_Type* usb_phy = USBPHY1;
+
+  // Enable PHY support for Low speed device + LS via FS Hub
+  usb_phy->CTRL |= USBPHY_CTRL_SET_ENUTMILEVEL2_MASK | USBPHY_CTRL_SET_ENUTMILEVEL3_MASK;
+
+  // Enable all power for normal operation
+  usb_phy->PWD = 0;
+
+  // TX Timing
+  uint32_t phytx = usb_phy->TX;
+  phytx &= ~(USBPHY_TX_D_CAL_MASK | USBPHY_TX_TXCAL45DM_MASK | USBPHY_TX_TXCAL45DP_MASK);
+  phytx |= USBPHY_TX_D_CAL(0x0C) | USBPHY_TX_TXCAL45DP(0x06) | USBPHY_TX_TXCAL45DM(0x06);
+  usb_phy->TX = phytx;
+
+  // USB1
+//  CLOCK_EnableUsbhs1PhyPllClock(kCLOCK_Usbphy480M, 480000000U);
+//  CLOCK_EnableUsbhs1Clock(kCLOCK_Usb480M, 480000000U);
+}
+
+//--------------------------------------------------------------------+
+// USB Interrupt Handler
+//--------------------------------------------------------------------+
+void USB_OTG1_IRQHandler(void)
+{
+  #if CFG_TUSB_RHPORT0_MODE & OPT_MODE_HOST
+    tuh_isr(0);
+  #endif
+
+  #if CFG_TUSB_RHPORT0_MODE & OPT_MODE_DEVICE
+    tud_isr(0);
+  #endif
+}
+
+void USB_OTG2_IRQHandler(void)
+{
+  #if CFG_TUSB_RHPORT1_MODE & OPT_MODE_HOST
+    tuh_isr(1);
+  #endif
+
+  #if CFG_TUSB_RHPORT1_MODE & OPT_MODE_DEVICE
+    tud_isr(1);
+  #endif
+}
+
+//--------------------------------------------------------------------+
+// Board porting API
+//--------------------------------------------------------------------+
+
+void board_led_write(bool state)
+{
+  GPIO_PinWrite(LED_PORT, LED_PIN, state ? LED_STATE_ON : (1-LED_STATE_ON));
+}
+
+uint32_t board_button_read(void)
+{
+  // active low
+  return BUTTON_STATE_ACTIVE == GPIO_PinRead(BUTTON_PORT, BUTTON_PIN);
+}
+
+int board_uart_read(uint8_t* buf, int len)
+{
+  LPUART_ReadBlocking(UART_PORT, buf, len);
+  return len;
+}
+
+int board_uart_write(void const * buf, int len)
+{
+  LPUART_WriteBlocking(UART_PORT, (uint8_t*)buf, len);
+  return len;
+}
+
+#if CFG_TUSB_OS == OPT_OS_NONE
+volatile uint32_t system_ticks = 0;
+void SysTick_Handler(void)
+{
+  system_ticks++;
+}
+
+uint32_t board_millis(void)
+{
+  return system_ticks;
+}
+#endif
diff --git a/hw/bsp/teensy_40/teensy40_flexspi_nor_config.c b/hw/bsp/teensy_40/teensy40_flexspi_nor_config.c
new file mode 100644
index 000000000..dbedc90a0
--- /dev/null
+++ b/hw/bsp/teensy_40/teensy40_flexspi_nor_config.c
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2018 NXP
+ * All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include "teensy40_flexspi_nor_config.h"
+
+/* Component ID definition, used by tools. */
+#ifndef FSL_COMPONENT_ID
+#define FSL_COMPONENT_ID "platform.drivers.xip_board"
+#endif
+
+/*******************************************************************************
+ * Code
+ ******************************************************************************/
+#if defined(XIP_BOOT_HEADER_ENABLE) && (XIP_BOOT_HEADER_ENABLE == 1)
+#if defined(__CC_ARM) || defined(__ARMCC_VERSION) || defined(__GNUC__)
+__attribute__((section(".boot_hdr.conf")))
+#elif defined(__ICCARM__)
+#pragma location = ".boot_hdr.conf"
+#endif
+
+const flexspi_nor_config_t qspiflash_config = {
+    .memConfig =
+        {
+            .tag              = FLEXSPI_CFG_BLK_TAG,
+            .version          = FLEXSPI_CFG_BLK_VERSION,
+            .readSampleClkSrc = kFlexSPIReadSampleClk_LoopbackFromDqsPad,
+            .csHoldTime       = 3u,
+            .csSetupTime      = 3u,
+            // Enable DDR mode, Wordaddassable, Safe configuration, Differential clock
+            .sflashPadType = kSerialFlash_4Pads,
+            .serialClkFreq = kFlexSpiSerialClk_100MHz,
+            .sflashA1Size  = 2u * 1024u * 1024u,
+            .lookupTable =
+                {
+                    // Read LUTs
+                    FLEXSPI_LUT_SEQ(CMD_SDR, FLEXSPI_1PAD, 0xEB, RADDR_SDR, FLEXSPI_4PAD, 0x18),
+                    FLEXSPI_LUT_SEQ(DUMMY_SDR, FLEXSPI_4PAD, 0x06, READ_SDR, FLEXSPI_4PAD, 0x04),
+                },
+        },
+    .pageSize           = 256u,
+    .sectorSize         = 4u * 1024u,
+    .blockSize          = 256u * 1024u,
+    .isUniformBlockSize = false,
+};
+#endif /* XIP_BOOT_HEADER_ENABLE */
diff --git a/hw/bsp/teensy_40/teensy40_flexspi_nor_config.h b/hw/bsp/teensy_40/teensy40_flexspi_nor_config.h
new file mode 100644
index 000000000..56068ec6a
--- /dev/null
+++ b/hw/bsp/teensy_40/teensy40_flexspi_nor_config.h
@@ -0,0 +1,268 @@
+/*
+ * Copyright 2018 NXP
+ * All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef __TEENSY40_FLEXSPI_NOR_CONFIG__
+#define __TEENSY40_FLEXSPI_NOR_CONFIG__
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "fsl_common.h"
+
+/*! @name Driver version */
+/*@{*/
+/*! @brief XIP_BOARD driver version 2.0.0. */
+#define FSL_XIP_BOARD_DRIVER_VERSION (MAKE_VERSION(2, 0, 0))
+/*@}*/
+
+/* FLEXSPI memory config block related defintions */
+#define FLEXSPI_CFG_BLK_TAG (0x42464346UL)     // ascii "FCFB" Big Endian
+#define FLEXSPI_CFG_BLK_VERSION (0x56010400UL) // V1.4.0
+#define FLEXSPI_CFG_BLK_SIZE (512)
+
+/* FLEXSPI Feature related definitions */
+#define FLEXSPI_FEATURE_HAS_PARALLEL_MODE 1
+
+/* Lookup table related defintions */
+#define CMD_INDEX_READ 0
+#define CMD_INDEX_READSTATUS 1
+#define CMD_INDEX_WRITEENABLE 2
+#define CMD_INDEX_WRITE 4
+
+#define CMD_LUT_SEQ_IDX_READ 0
+#define CMD_LUT_SEQ_IDX_READSTATUS 1
+#define CMD_LUT_SEQ_IDX_WRITEENABLE 3
+#define CMD_LUT_SEQ_IDX_WRITE 9
+
+#define CMD_SDR 0x01
+#define CMD_DDR 0x21
+#define RADDR_SDR 0x02
+#define RADDR_DDR 0x22
+#define CADDR_SDR 0x03
+#define CADDR_DDR 0x23
+#define MODE1_SDR 0x04
+#define MODE1_DDR 0x24
+#define MODE2_SDR 0x05
+#define MODE2_DDR 0x25
+#define MODE4_SDR 0x06
+#define MODE4_DDR 0x26
+#define MODE8_SDR 0x07
+#define MODE8_DDR 0x27
+#define WRITE_SDR 0x08
+#define WRITE_DDR 0x28
+#define READ_SDR 0x09
+#define READ_DDR 0x29
+#define LEARN_SDR 0x0A
+#define LEARN_DDR 0x2A
+#define DATSZ_SDR 0x0B
+#define DATSZ_DDR 0x2B
+#define DUMMY_SDR 0x0C
+#define DUMMY_DDR 0x2C
+#define DUMMY_RWDS_SDR 0x0D
+#define DUMMY_RWDS_DDR 0x2D
+#define JMP_ON_CS 0x1F
+#define STOP 0
+
+#define FLEXSPI_1PAD 0
+#define FLEXSPI_2PAD 1
+#define FLEXSPI_4PAD 2
+#define FLEXSPI_8PAD 3
+
+#define FLEXSPI_LUT_SEQ(cmd0, pad0, op0, cmd1, pad1, op1)                                                              \
+    (FLEXSPI_LUT_OPERAND0(op0) | FLEXSPI_LUT_NUM_PADS0(pad0) | FLEXSPI_LUT_OPCODE0(cmd0) | FLEXSPI_LUT_OPERAND1(op1) | \
+     FLEXSPI_LUT_NUM_PADS1(pad1) | FLEXSPI_LUT_OPCODE1(cmd1))
+
+//!@brief Definitions for FlexSPI Serial Clock Frequency
+typedef enum _FlexSpiSerialClockFreq
+{
+    kFlexSpiSerialClk_30MHz  = 1,
+    kFlexSpiSerialClk_50MHz  = 2,
+    kFlexSpiSerialClk_60MHz  = 3,
+    kFlexSpiSerialClk_75MHz  = 4,
+    kFlexSpiSerialClk_80MHz  = 5,
+    kFlexSpiSerialClk_100MHz = 6,
+    kFlexSpiSerialClk_120MHz = 7,
+    kFlexSpiSerialClk_133MHz = 8,
+    kFlexSpiSerialClk_166MHz = 9,
+} flexspi_serial_clk_freq_t;
+
+//!@brief FlexSPI clock configuration type
+enum
+{
+    kFlexSpiClk_SDR, //!< Clock configure for SDR mode
+    kFlexSpiClk_DDR, //!< Clock configurat for DDR mode
+};
+
+//!@brief FlexSPI Read Sample Clock Source definition
+typedef enum _FlashReadSampleClkSource
+{
+    kFlexSPIReadSampleClk_LoopbackInternally      = 0,
+    kFlexSPIReadSampleClk_LoopbackFromDqsPad      = 1,
+    kFlexSPIReadSampleClk_LoopbackFromSckPad      = 2,
+    kFlexSPIReadSampleClk_ExternalInputFromDqsPad = 3,
+} flexspi_read_sample_clk_t;
+
+//!@brief Misc feature bit definitions
+enum
+{
+    kFlexSpiMiscOffset_DiffClkEnable            = 0, //!< Bit for Differential clock enable
+    kFlexSpiMiscOffset_Ck2Enable                = 1, //!< Bit for CK2 enable
+    kFlexSpiMiscOffset_ParallelEnable           = 2, //!< Bit for Parallel mode enable
+    kFlexSpiMiscOffset_WordAddressableEnable    = 3, //!< Bit for Word Addressable enable
+    kFlexSpiMiscOffset_SafeConfigFreqEnable     = 4, //!< Bit for Safe Configuration Frequency enable
+    kFlexSpiMiscOffset_PadSettingOverrideEnable = 5, //!< Bit for Pad setting override enable
+    kFlexSpiMiscOffset_DdrModeEnable            = 6, //!< Bit for DDR clock confiuration indication.
+};
+
+//!@brief Flash Type Definition
+enum
+{
+    kFlexSpiDeviceType_SerialNOR    = 1,    //!< Flash devices are Serial NOR
+    kFlexSpiDeviceType_SerialNAND   = 2,    //!< Flash devices are Serial NAND
+    kFlexSpiDeviceType_SerialRAM    = 3,    //!< Flash devices are Serial RAM/HyperFLASH
+    kFlexSpiDeviceType_MCP_NOR_NAND = 0x12, //!< Flash device is MCP device, A1 is Serial NOR, A2 is Serial NAND
+    kFlexSpiDeviceType_MCP_NOR_RAM  = 0x13, //!< Flash deivce is MCP device, A1 is Serial NOR, A2 is Serial RAMs
+};
+
+//!@brief Flash Pad Definitions
+enum
+{
+    kSerialFlash_1Pad  = 1,
+    kSerialFlash_2Pads = 2,
+    kSerialFlash_4Pads = 4,
+    kSerialFlash_8Pads = 8,
+};
+
+//!@brief FlexSPI LUT Sequence structure
+typedef struct _lut_sequence
+{
+    uint8_t seqNum; //!< Sequence Number, valid number: 1-16
+    uint8_t seqId;  //!< Sequence Index, valid number: 0-15
+    uint16_t reserved;
+} flexspi_lut_seq_t;
+
+//!@brief Flash Configuration Command Type
+enum
+{
+    kDeviceConfigCmdType_Generic,    //!< Generic command, for example: configure dummy cycles, drive strength, etc
+    kDeviceConfigCmdType_QuadEnable, //!< Quad Enable command
+    kDeviceConfigCmdType_Spi2Xpi,    //!< Switch from SPI to DPI/QPI/OPI mode
+    kDeviceConfigCmdType_Xpi2Spi,    //!< Switch from DPI/QPI/OPI to SPI mode
+    kDeviceConfigCmdType_Spi2NoCmd,  //!< Switch to 0-4-4/0-8-8 mode
+    kDeviceConfigCmdType_Reset,      //!< Reset device command
+};
+
+//!@brief FlexSPI Memory Configuration Block
+typedef struct _FlexSPIConfig
+{
+    uint32_t tag;               //!< [0x000-0x003] Tag, fixed value 0x42464346UL
+    uint32_t version;           //!< [0x004-0x007] Version,[31:24] -'V', [23:16] - Major, [15:8] - Minor, [7:0] - bugfix
+    uint32_t reserved0;         //!< [0x008-0x00b] Reserved for future use
+    uint8_t readSampleClkSrc;   //!< [0x00c-0x00c] Read Sample Clock Source, valid value: 0/1/3
+    uint8_t csHoldTime;         //!< [0x00d-0x00d] CS hold time, default value: 3
+    uint8_t csSetupTime;        //!< [0x00e-0x00e] CS setup time, default value: 3
+    uint8_t columnAddressWidth; //!< [0x00f-0x00f] Column Address with, for HyperBus protocol, it is fixed to 3, For
+    //! Serial NAND, need to refer to datasheet
+    uint8_t deviceModeCfgEnable; //!< [0x010-0x010] Device Mode Configure enable flag, 1 - Enable, 0 - Disable
+    uint8_t deviceModeType; //!< [0x011-0x011] Specify the configuration command type:Quad Enable, DPI/QPI/OPI switch,
+    //! Generic configuration, etc.
+    uint16_t waitTimeCfgCommands; //!< [0x012-0x013] Wait time for all configuration commands, unit: 100us, Used for
+    //! DPI/QPI/OPI switch or reset command
+    flexspi_lut_seq_t deviceModeSeq; //!< [0x014-0x017] Device mode sequence info, [7:0] - LUT sequence id, [15:8] - LUt
+    //! sequence number, [31:16] Reserved
+    uint32_t deviceModeArg;    //!< [0x018-0x01b] Argument/Parameter for device configuration
+    uint8_t configCmdEnable;   //!< [0x01c-0x01c] Configure command Enable Flag, 1 - Enable, 0 - Disable
+    uint8_t configModeType[3]; //!< [0x01d-0x01f] Configure Mode Type, similar as deviceModeTpe
+    flexspi_lut_seq_t
+        configCmdSeqs[3]; //!< [0x020-0x02b] Sequence info for Device Configuration command, similar as deviceModeSeq
+    uint32_t reserved1;   //!< [0x02c-0x02f] Reserved for future use
+    uint32_t configCmdArgs[3];     //!< [0x030-0x03b] Arguments/Parameters for device Configuration commands
+    uint32_t reserved2;            //!< [0x03c-0x03f] Reserved for future use
+    uint32_t controllerMiscOption; //!< [0x040-0x043] Controller Misc Options, see Misc feature bit definitions for more
+    //! details
+    uint8_t deviceType;    //!< [0x044-0x044] Device Type:  See Flash Type Definition for more details
+    uint8_t sflashPadType; //!< [0x045-0x045] Serial Flash Pad Type: 1 - Single, 2 - Dual, 4 - Quad, 8 - Octal
+    uint8_t serialClkFreq; //!< [0x046-0x046] Serial Flash Frequencey, device specific definitions, See System Boot
+    //! Chapter for more details
+    uint8_t lutCustomSeqEnable; //!< [0x047-0x047] LUT customization Enable, it is required if the program/erase cannot
+    //! be done using 1 LUT sequence, currently, only applicable to HyperFLASH
+    uint32_t reserved3[2];           //!< [0x048-0x04f] Reserved for future use
+    uint32_t sflashA1Size;           //!< [0x050-0x053] Size of Flash connected to A1
+    uint32_t sflashA2Size;           //!< [0x054-0x057] Size of Flash connected to A2
+    uint32_t sflashB1Size;           //!< [0x058-0x05b] Size of Flash connected to B1
+    uint32_t sflashB2Size;           //!< [0x05c-0x05f] Size of Flash connected to B2
+    uint32_t csPadSettingOverride;   //!< [0x060-0x063] CS pad setting override value
+    uint32_t sclkPadSettingOverride; //!< [0x064-0x067] SCK pad setting override value
+    uint32_t dataPadSettingOverride; //!< [0x068-0x06b] data pad setting override value
+    uint32_t dqsPadSettingOverride;  //!< [0x06c-0x06f] DQS pad setting override value
+    uint32_t timeoutInMs;            //!< [0x070-0x073] Timeout threshold for read status command
+    uint32_t commandInterval;        //!< [0x074-0x077] CS deselect interval between two commands
+    uint16_t dataValidTime[2]; //!< [0x078-0x07b] CLK edge to data valid time for PORT A and PORT B, in terms of 0.1ns
+    uint16_t busyOffset;       //!< [0x07c-0x07d] Busy offset, valid value: 0-31
+    uint16_t busyBitPolarity;  //!< [0x07e-0x07f] Busy flag polarity, 0 - busy flag is 1 when flash device is busy, 1 -
+    //! busy flag is 0 when flash device is busy
+    uint32_t lookupTable[64];           //!< [0x080-0x17f] Lookup table holds Flash command sequences
+    flexspi_lut_seq_t lutCustomSeq[12]; //!< [0x180-0x1af] Customizable LUT Sequences
+    uint32_t reserved4[4];              //!< [0x1b0-0x1bf] Reserved for future use
+} flexspi_mem_config_t;
+
+/*  */
+#define NOR_CMD_INDEX_READ CMD_INDEX_READ               //!< 0
+#define NOR_CMD_INDEX_READSTATUS CMD_INDEX_READSTATUS   //!< 1
+#define NOR_CMD_INDEX_WRITEENABLE CMD_INDEX_WRITEENABLE //!< 2
+#define NOR_CMD_INDEX_ERASESECTOR 3                     //!< 3
+#define NOR_CMD_INDEX_PAGEPROGRAM CMD_INDEX_WRITE       //!< 4
+#define NOR_CMD_INDEX_CHIPERASE 5                       //!< 5
+#define NOR_CMD_INDEX_DUMMY 6                           //!< 6
+#define NOR_CMD_INDEX_ERASEBLOCK 7                      //!< 7
+
+#define NOR_CMD_LUT_SEQ_IDX_READ CMD_LUT_SEQ_IDX_READ //!< 0  READ LUT sequence id in lookupTable stored in config block
+#define NOR_CMD_LUT_SEQ_IDX_READSTATUS \
+    CMD_LUT_SEQ_IDX_READSTATUS //!< 1  Read Status LUT sequence id in lookupTable stored in config block
+#define NOR_CMD_LUT_SEQ_IDX_READSTATUS_XPI \
+    2 //!< 2  Read status DPI/QPI/OPI sequence id in lookupTable stored in config block
+#define NOR_CMD_LUT_SEQ_IDX_WRITEENABLE \
+    CMD_LUT_SEQ_IDX_WRITEENABLE //!< 3  Write Enable sequence id in lookupTable stored in config block
+#define NOR_CMD_LUT_SEQ_IDX_WRITEENABLE_XPI \
+    4 //!< 4  Write Enable DPI/QPI/OPI sequence id in lookupTable stored in config block
+#define NOR_CMD_LUT_SEQ_IDX_ERASESECTOR 5 //!< 5  Erase Sector sequence id in lookupTable stored in config block
+#define NOR_CMD_LUT_SEQ_IDX_ERASEBLOCK 8  //!< 8 Erase Block sequence id in lookupTable stored in config block
+#define NOR_CMD_LUT_SEQ_IDX_PAGEPROGRAM \
+    CMD_LUT_SEQ_IDX_WRITE                //!< 9  Program sequence id in lookupTable stored in config block
+#define NOR_CMD_LUT_SEQ_IDX_CHIPERASE 11 //!< 11 Chip Erase sequence in lookupTable id stored in config block
+#define NOR_CMD_LUT_SEQ_IDX_READ_SFDP 13 //!< 13 Read SFDP sequence in lookupTable id stored in config block
+#define NOR_CMD_LUT_SEQ_IDX_RESTORE_NOCMD \
+    14 //!< 14 Restore 0-4-4/0-8-8 mode sequence id in lookupTable stored in config block
+#define NOR_CMD_LUT_SEQ_IDX_EXIT_NOCMD \
+    15 //!< 15 Exit 0-4-4/0-8-8 mode sequence id in lookupTable stored in config blobk
+
+/*
+ *  Serial NOR configuration block
+ */
+typedef struct _flexspi_nor_config
+{
+    flexspi_mem_config_t memConfig; //!< Common memory configuration info via FlexSPI
+    uint32_t pageSize;              //!< Page size of Serial NOR
+    uint32_t sectorSize;            //!< Sector size of Serial NOR
+    uint8_t ipcmdSerialClkFreq;     //!< Clock frequency for IP command
+    uint8_t isUniformBlockSize;     //!< Sector/Block size is the same
+    uint8_t reserved0[2];           //!< Reserved for future use
+    uint8_t serialNorType;          //!< Serial NOR Flash type: 0/1/2/3
+    uint8_t needExitNoCmdMode;      //!< Need to exit NoCmd mode before other IP command
+    uint8_t halfClkForNonReadCmd;   //!< Half the Serial Clock for non-read command: true/false
+    uint8_t needRestoreNoCmdMode;   //!< Need to Restore NoCmd mode after IP commmand execution
+    uint32_t blockSize;             //!< Block size
+    uint32_t reserve2[11];          //!< Reserved for future use
+} flexspi_nor_config_t;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* __EVKMIMXRT1060_FLEXSPI_NOR_CONFIG__ */
diff --git a/hw/mcu/nuvoton b/hw/mcu/nuvoton
new file mode 160000
+Subproject dc96fff794d14818c93ea1d4d760d51a014d70c
diff --git a/src/common/tusb_common.h b/src/common/tusb_common.h
index 5700c1282..839989c92 100644
--- a/src/common/tusb_common.h
+++ b/src/common/tusb_common.h
@@ -39,8 +39,8 @@
 // Macros Helper

 //--------------------------------------------------------------------+

 #define TU_ARRAY_SIZE(_arr)   ( sizeof(_arr) / sizeof(_arr[0]) )

-#define TU_MIN(_x, _y)        ( (_x) < (_y) ) ? (_x) : (_y) )

-#define TU_MAX(_x, _y)        ( (_x) > (_y) ) ? (_x) : (_y) )

+#define TU_MIN(_x, _y)        ( ( (_x) < (_y) ) ? (_x) : (_y) )

+#define TU_MAX(_x, _y)        ( ( (_x) > (_y) ) ? (_x) : (_y) )

 

 #define TU_U16_HIGH(u16)      ((uint8_t) (((u16) >> 8) & 0x00ff))

 #define TU_U16_LOW(u16)       ((uint8_t) ((u16)       & 0x00ff))

diff --git a/src/device/usbd.c b/src/device/usbd.c
index 949e14096..fcc623d33 100644
--- a/src/device/usbd.c
+++ b/src/device/usbd.c
@@ -519,9 +519,11 @@ static bool process_control_request(uint8_t rhport, tusb_control_request_t const
           uint8_t const cfg_num = (uint8_t) p_request->wValue;

 

           dcd_set_config(rhport, cfg_num);

+

+          if ( !_usbd_dev.configured && cfg_num ) TU_ASSERT( process_set_config(rhport, cfg_num) );

+

           _usbd_dev.configured = cfg_num ? 1 : 0;

 

-          if ( cfg_num ) TU_ASSERT( process_set_config(rhport, cfg_num) );

           tud_control_status(rhport, p_request);

         }

         break;

@@ -618,7 +620,6 @@ static bool process_control_request(uint8_t rhport, tusb_control_request_t const
       TU_ASSERT(ep_num < TU_ARRAY_SIZE(_usbd_dev.ep2drv) );

 

       uint8_t const drvid = _usbd_dev.ep2drv[ep_num][ep_dir];

-      TU_ASSERT(drvid < USBD_CLASS_DRIVER_COUNT);

 

       bool ret = false;

 

@@ -658,13 +659,17 @@ static bool process_control_request(uint8_t rhport, tusb_control_request_t const
         }

       }

 

-      // Some classes such as USBTMC needs to clear/re-init its buffer when receiving CLEAR_FEATURE request

-      // We will forward all request targeted endpoint to class drivers after

-      // - For class-type requests: driver is fully responsible to reply to host

-      // - For std-type requests  : driver init/re-init internal variable/buffer only, and

-      //                            must not call tud_control_status(), driver's return value will have no effect.

-      //                            EP state has already affected (stalled/cleared)

-      if ( invoke_class_control(rhport, drvid, p_request) ) ret = true;

+      if (drvid < 0xFF) {

+        TU_ASSERT(drvid < USBD_CLASS_DRIVER_COUNT);

+        

+        // Some classes such as USBTMC needs to clear/re-init its buffer when receiving CLEAR_FEATURE request

+        // We will forward all request targeted endpoint to class drivers after

+        // - For class-type requests: driver is fully responsible to reply to host

+        // - For std-type requests  : driver init/re-init internal variable/buffer only, and

+        //                            must not call tud_control_status(), driver's return value will have no effect.

+        //                            EP state has already affected (stalled/cleared)

+        if ( invoke_class_control(rhport, drvid, p_request) ) ret = true;

+      }

 

       if ( TUSB_REQ_TYPE_STANDARD == p_request->bmRequestType_bit.type )

       {

diff --git a/src/portable/nuvoton/nuc121/dcd_nuc121.c b/src/portable/nuvoton/nuc121/dcd_nuc121.c
new file mode 100644
index 000000000..afe2cf001
--- /dev/null
+++ b/src/portable/nuvoton/nuc121/dcd_nuc121.c
@@ -0,0 +1,434 @@
+/*

+ * The MIT License (MIT)

+ *

+ * Copyright (c) 2019 Peter Lawrence

+ *

+ * 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.

+ */

+

+/*

+  Theory of operation:

+

+  The NUC121/NUC125/NUC126 USBD peripheral has eight "EP"s, but each is simplex, 

+  so two collectively (peripheral nomenclature of "EP0" and "EP1") are needed to 

+  implement USB EP0.  PERIPH_EP0 and PERIPH_EP1 are used by this driver for 

+  EP0_IN and EP0_OUT respectively.  This leaves up to six for user usage.

+*/

+

+#include "tusb_option.h"

+

+#if TUSB_OPT_DEVICE_ENABLED && ( (CFG_TUSB_MCU == OPT_MCU_NUC121) || (CFG_TUSB_MCU == OPT_MCU_NUC126) )

+

+#include "device/dcd.h"

+#include "NuMicro.h"

+

+/* allocation of USBD RAM for Setup, EP0_IN, and and EP_OUT */

+#define PERIPH_SETUP_BUF_BASE  0

+#define PERIPH_SETUP_BUF_LEN   8

+#define PERIPH_EP0_BUF_BASE    (PERIPH_SETUP_BUF_BASE + PERIPH_SETUP_BUF_LEN)

+#define PERIPH_EP0_BUF_LEN     CFG_TUD_ENDPOINT0_SIZE

+#define PERIPH_EP1_BUF_BASE    (PERIPH_EP0_BUF_BASE + PERIPH_EP0_BUF_LEN)

+#define PERIPH_EP1_BUF_LEN     CFG_TUD_ENDPOINT0_SIZE

+#define PERIPH_EP2_BUF_BASE    (PERIPH_EP1_BUF_BASE + PERIPH_EP1_BUF_LEN)

+

+/* rather important info unfortunately not provided by device include files: how much there is */

+#define USBD_BUF_SIZE          ((CFG_TUSB_MCU == OPT_MCU_NUC121) ? 768 : 512)

+

+enum ep_enum

+{

+  PERIPH_EP0 = 0,

+  PERIPH_EP1 = 1,

+  PERIPH_EP2 = 2,

+  PERIPH_EP3 = 3,

+  PERIPH_EP4 = 4,

+  PERIPH_EP5 = 5,

+  PERIPH_EP6 = 6,

+  PERIPH_EP7 = 7,

+  PERIPH_MAX_EP,

+};

+

+/* set by dcd_set_address() */

+static volatile uint8_t assigned_address;

+

+/* reset by dcd_init(), this is used by dcd_edpt_open() to assign USBD peripheral buffer addresses */

+static uint32_t bufseg_addr;

+

+/* used by dcd_edpt_xfer() and the ISR to reset the data sync (DATA0/DATA1) in an EP0_IN transfer */

+static bool active_ep0_xfer;

+

+/* RAM table needed to track ongoing transfers performed by dcd_edpt_xfer(), dcd_in_xfer(), and the ISR */

+static struct xfer_ctl_t

+{

+  uint8_t *data_ptr;         /* collectively, data_ptr and remaining_bytes track progress of endpoint transfers */

+  uint16_t remaining_bytes;

+  uint16_t max_packet_size;  /* needed since device driver only finds out this at runtime */

+  uint16_t total_bytes;      /* quantity needed to pass as argument to dcd_event_xfer_complete() (for IN endpoints) */

+} xfer_table[PERIPH_MAX_EP];

+

+/*

+  local helper functions

+*/

+

+static void usb_attach(void)

+{

+  USBD->SE0 &= ~USBD_SE0_SE0_Msk;

+}

+

+static void usb_detach(void)

+{

+  USBD->SE0 |= USBD_SE0_SE0_Msk;

+}

+

+static void usb_control_send_zlp(void)

+{

+  USBD->EP[PERIPH_EP0].CFG |= USBD_CFG_DSQSYNC_Msk;

+  USBD->EP[PERIPH_EP0].MXPLD = 0;

+}

+

+/* reconstruct ep_addr from particular USB Configuration Register */

+static uint8_t decode_ep_addr(USBD_EP_T *ep)

+{

+  uint8_t ep_addr = ep->CFG & USBD_CFG_EPNUM_Msk;

+  if ( USBD_CFG_EPMODE_IN == (ep->CFG & USBD_CFG_STATE_Msk) )

+    ep_addr |= TUSB_DIR_IN_MASK;

+  return ep_addr;

+}

+

+/* map 8-bit ep_addr into peripheral endpoint index (PERIPH_EP0...) */

+static USBD_EP_T *ep_entry(uint8_t ep_addr, bool add)

+{

+  USBD_EP_T *ep;

+  enum ep_enum ep_index;

+

+  for (ep_index = PERIPH_EP0, ep = USBD->EP; ep_index < PERIPH_MAX_EP; ep_index++, ep++)

+  {

+    if (add)

+    {

+      /* take first peripheral endpoint that is unused */

+      if (0 == (ep->CFG & USBD_CFG_STATE_Msk)) return ep;

+    }

+    else

+    {

+      /* find a peripheral endpoint that matches ep_addr */

+      uint8_t candidate_ep_addr = decode_ep_addr(ep);

+      if (candidate_ep_addr == ep_addr) return ep;

+    }

+  }

+

+  return NULL;

+}

+

+/* perform an IN endpoint transfer; this is called by dcd_edpt_xfer() and the ISR  */

+static void dcd_in_xfer(struct xfer_ctl_t *xfer, USBD_EP_T *ep)

+{

+  uint16_t bytes_now = tu_min16(xfer->remaining_bytes, xfer->max_packet_size);

+

+  memcpy((uint8_t *)(USBD_BUF_BASE + ep->BUFSEG), xfer->data_ptr, bytes_now);

+  ep->MXPLD = bytes_now;

+}

+

+/* centralized location for USBD interrupt enable bit mask */

+static const uint32_t enabled_irqs = USBD_INTSTS_VBDETIF_Msk | USBD_INTSTS_BUSIF_Msk | USBD_INTSTS_SETUP_Msk | USBD_INTSTS_USBIF_Msk | USBD_INTSTS_SOFIF_Msk;

+

+/*

+  NUC121/NUC125/NUC126 TinyUSB API driver implementation

+*/

+

+void dcd_init(uint8_t rhport)

+{

+  (void) rhport;

+

+#ifdef SUPPORT_LPM

+  USBD->ATTR = 0x7D0 | USBD_LPMACK;

+#else

+  USBD->ATTR = 0x7D0;

+#endif

+

+  usb_detach();

+

+  USBD->STBUFSEG = PERIPH_SETUP_BUF_BASE;

+

+  for (enum ep_enum ep_index = PERIPH_EP0; ep_index < PERIPH_MAX_EP; ep_index++)

+  {

+    USBD->EP[ep_index].CFGP &= ~USBD_CFG_STATE_Msk;

+  }

+

+  /* allocate the default EP0 endpoints */

+

+  USBD->EP[PERIPH_EP0].CFG = USBD_CFG_CSTALL_Msk | USBD_CFG_EPMODE_IN;

+  USBD->EP[PERIPH_EP0].BUFSEG = PERIPH_EP0_BUF_BASE;

+  xfer_table[PERIPH_EP0].max_packet_size = PERIPH_EP0_BUF_LEN;

+

+  USBD->EP[PERIPH_EP1].CFG = USBD_CFG_CSTALL_Msk | USBD_CFG_EPMODE_OUT;

+  USBD->EP[PERIPH_EP1].BUFSEG = PERIPH_EP1_BUF_BASE;

+  xfer_table[PERIPH_EP1].max_packet_size = PERIPH_EP1_BUF_LEN;

+

+  /* USB RAM beyond what we've allocated above is available to the user */

+  bufseg_addr = PERIPH_EP2_BUF_BASE;

+

+  usb_attach();

+

+  USBD->INTSTS = enabled_irqs;

+  USBD->INTEN  = enabled_irqs;

+}

+

+void dcd_int_enable(uint8_t rhport)

+{

+  (void) rhport;

+  NVIC_EnableIRQ(USBD_IRQn);

+}

+

+void dcd_int_disable(uint8_t rhport)

+{

+  (void) rhport;

+  NVIC_DisableIRQ(USBD_IRQn);

+}

+

+void dcd_set_address(uint8_t rhport, uint8_t dev_addr)

+{

+  (void) rhport;

+  usb_control_send_zlp(); /* SET_ADDRESS is the one exception where TinyUSB doesn't use dcd_edpt_xfer() to generate a ZLP */

+  assigned_address = dev_addr;

+}

+

+void dcd_set_config(uint8_t rhport, uint8_t config_num)

+{

+  (void) rhport;

+  (void) config_num;

+}

+

+void dcd_remote_wakeup(uint8_t rhport)

+{

+  (void) rhport;

+  USBD->ATTR = USBD_ATTR_RWAKEUP_Msk;

+}

+

+bool dcd_edpt_open(uint8_t rhport, tusb_desc_endpoint_t const * p_endpoint_desc)

+{

+  (void) rhport;

+

+  USBD_EP_T *ep = ep_entry(p_endpoint_desc->bEndpointAddress, true);

+  TU_ASSERT(ep);

+

+  /* mine the data for the information we need */

+  int const dir = tu_edpt_dir(p_endpoint_desc->bEndpointAddress);

+  int const size = p_endpoint_desc->wMaxPacketSize.size;

+  tusb_xfer_type_t const type = p_endpoint_desc->bmAttributes.xfer;

+  struct xfer_ctl_t *xfer = &xfer_table[ep - USBD->EP];

+

+  /* allocate buffer from USB RAM */

+  ep->BUFSEG = bufseg_addr;

+  bufseg_addr += size;

+  TU_ASSERT(bufseg_addr <= USBD_BUF_SIZE);

+

+  /* construct USB Configuration Register value and then write it */

+  uint32_t cfg = tu_edpt_number(p_endpoint_desc->bEndpointAddress);

+  cfg |= (TUSB_DIR_IN == dir) ? USBD_CFG_EPMODE_IN : USBD_CFG_EPMODE_OUT;

+  if (TUSB_XFER_ISOCHRONOUS == type)

+    cfg |= USBD_CFG_TYPE_ISO;

+  ep->CFG = cfg;

+

+  /* make a note of the endpoint size */

+  xfer->max_packet_size = size;

+

+  return true;

+}

+

+bool dcd_edpt_xfer(uint8_t rhport, uint8_t ep_addr, uint8_t *buffer, uint16_t total_bytes)

+{

+  (void) rhport;

+

+  /* mine the data for the information we need */

+  tusb_dir_t dir = tu_edpt_dir(ep_addr);

+  USBD_EP_T *ep = ep_entry(ep_addr, false);

+  struct xfer_ctl_t *xfer = &xfer_table[ep - USBD->EP];

+

+  /* store away the information we'll needing now and later */

+  xfer->data_ptr = buffer;

+  xfer->remaining_bytes = total_bytes;

+  xfer->total_bytes = total_bytes;

+

+  /* for the first of one or more EP0_IN packets in a message, the first must be DATA1 */

+  if ( (0x80 == ep_addr) && !active_ep0_xfer ) ep->CFG |= USBD_CFG_DSQSYNC_Msk;

+

+  if (TUSB_DIR_IN == dir)

+    dcd_in_xfer(xfer, ep);

+  else

+    ep->MXPLD = xfer->max_packet_size;

+

+  return true;

+}

+

+void dcd_edpt_stall(uint8_t rhport, uint8_t ep_addr)

+{

+  (void) rhport;

+  USBD_EP_T *ep = ep_entry(ep_addr, false);

+  ep->CFGP |= USBD_CFGP_SSTALL_Msk;

+}

+

+void dcd_edpt_clear_stall(uint8_t rhport, uint8_t ep_addr)

+{

+  (void) rhport;

+  USBD_EP_T *ep = ep_entry(ep_addr, false);

+  ep->CFG |= USBD_CFG_CSTALL_Msk;

+}

+

+void USBD_IRQHandler(void)

+{

+  uint32_t status = USBD->INTSTS;

+#ifdef SUPPORT_LPM

+  uint32_t state = USBD->ATTR & 0x300f;

+#else

+  uint32_t state = USBD->ATTR & 0xf;

+#endif

+

+  if(status & USBD_INTSTS_VBDETIF_Msk)

+  {

+    if(USBD->VBUSDET & USBD_VBUSDET_VBUSDET_Msk)

+    {

+      /* USB connect */

+      USBD->ATTR |= USBD_ATTR_USBEN_Msk | USBD_ATTR_PHYEN_Msk;

+    }

+    else

+    {

+      /* USB disconnect */

+      USBD->ATTR &= ~USBD_ATTR_USBEN_Msk;

+    }

+  }

+

+  if(status & USBD_INTSTS_BUSIF_Msk)

+  {

+    if(state & USBD_ATTR_USBRST_Msk)

+    {

+      /* USB bus reset */

+      USBD->ATTR |= USBD_ATTR_USBEN_Msk | USBD_ATTR_PHYEN_Msk;

+

+      /* Reset all endpoints to DATA0 */

+      for(enum ep_enum ep_index = PERIPH_EP0; ep_index < PERIPH_MAX_EP; ep_index++)

+        USBD->EP[ep_index].CFG &= ~USBD_CFG_DSQSYNC_Msk;

+

+      /* Reset USB device address */

+      USBD->FADDR = 0;

+

+      /* reset EP0_IN flag */

+      active_ep0_xfer = false;

+

+      dcd_event_bus_signal(0, DCD_EVENT_BUS_RESET, true);

+    }

+

+    if(state & USBD_ATTR_SUSPEND_Msk)

+    {

+      /* Enable USB but disable PHY */

+      USBD->ATTR &= ~USBD_ATTR_PHYEN_Msk;

+      dcd_event_bus_signal(0, DCD_EVENT_SUSPEND, true);

+    }

+

+    if(state & USBD_ATTR_RESUME_Msk)

+    {

+      /* Enable USB and enable PHY */

+      USBD->ATTR |= USBD_ATTR_USBEN_Msk | USBD_ATTR_PHYEN_Msk;

+      dcd_event_bus_signal(0, DCD_EVENT_RESUME, true);

+    }

+  }

+

+  if(status & USBD_INTSTS_SETUP_Msk)

+  {

+    /* clear the data ready flag of control endpoints */

+    USBD->EP[PERIPH_EP0].CFGP |= USBD_CFGP_CLRRDY_Msk;

+    USBD->EP[PERIPH_EP1].CFGP |= USBD_CFGP_CLRRDY_Msk;

+

+    /* get SETUP packet from USB buffer */

+    dcd_event_setup_received(0, (uint8_t *)USBD_BUF_BASE, true);

+  }

+

+  if(status & USBD_INTSTS_USBIF_Msk)

+  {

+    if (status & USBD_INTSTS_EPEVT0_Msk) /* PERIPH_EP0 (EP0_IN) event: this is treated separately from the rest */

+    {

+      /* given ACK from host has happened, we can now set the address (if not already done) */

+      if((USBD->FADDR != assigned_address) && (USBD->FADDR == 0)) USBD->FADDR = assigned_address;

+

+      uint16_t const available_bytes = USBD->EP[PERIPH_EP0].MXPLD;

+

+      active_ep0_xfer = (available_bytes == xfer_table[PERIPH_EP0].max_packet_size);

+

+      dcd_event_xfer_complete(0, 0x80, available_bytes, XFER_RESULT_SUCCESS, true);

+    }

+

+    /* service PERIPH_EP1 through PERIPH_EP7 */

+    enum ep_enum ep_index;

+    uint32_t mask;

+    struct xfer_ctl_t *xfer;

+    USBD_EP_T *ep;

+    for (ep_index = PERIPH_EP1, mask = USBD_INTSTS_EPEVT1_Msk, xfer = &xfer_table[PERIPH_EP1], ep = &USBD->EP[PERIPH_EP1]; ep_index <= PERIPH_EP7; ep_index++, mask <<= 1, xfer++, ep++)

+    {

+      if(status & mask)

+      {

+        USBD->INTSTS = mask;

+

+        uint16_t const available_bytes = ep->MXPLD;

+        uint8_t const ep_addr = decode_ep_addr(ep);

+        bool const out_ep = !(ep_addr & TUSB_DIR_IN_MASK);

+

+        if (out_ep)

+        {

+          /* copy the data from the PC to the previously provided buffer */

+          memcpy(xfer->data_ptr, (uint8_t *)(USBD_BUF_BASE + ep->BUFSEG), available_bytes);

+          xfer->remaining_bytes -= available_bytes;

+          xfer->data_ptr += available_bytes;

+

+          /* when the transfer is finished, alert TinyUSB */

+          if ( (0 == xfer->remaining_bytes) || (available_bytes < xfer->max_packet_size) )

+            dcd_event_xfer_complete(0, ep_addr, available_bytes, XFER_RESULT_SUCCESS, true);

+        }

+        else

+        {

+          /* update the bookkeeping to reflect the data that has now been sent to the PC */

+          xfer->remaining_bytes -= available_bytes;

+          xfer->data_ptr += available_bytes;

+

+          /* if more data to send, send it; otherwise, alert TinyUSB that we've finished */

+          if (xfer->remaining_bytes)

+            dcd_in_xfer(xfer, ep);

+          else

+            dcd_event_xfer_complete(0, ep_addr, xfer->total_bytes, XFER_RESULT_SUCCESS, true);

+        }

+      }

+    }

+  }

+

+  if(status & USBD_INTSTS_SOFIF_Msk)

+  {

+    /* Start-Of-Frame event */

+    dcd_event_bus_signal(0, DCD_EVENT_SOF, true);

+  }

+

+  /* acknowledge all interrupts */

+  USBD->INTSTS = status & enabled_irqs;

+}

+

+void dcd_isr(uint8_t rhport)

+{

+  (void) rhport;

+  USBD_IRQHandler();

+}

+

+#endif

diff --git a/src/tusb_option.h b/src/tusb_option.h
index 266687ff7..6d547077e 100644
--- a/src/tusb_option.h
+++ b/src/tusb_option.h
@@ -77,6 +77,9 @@
 

 #define OPT_MCU_MIMXRT10XX        700 ///< NXP iMX RT10xx

 

+#define OPT_MCU_NUC121            800

+#define OPT_MCU_NUC126            801

+

 /** @} */

 

 /** \defgroup group_supported_os Supported RTOS