Merge branch 'master' into cr1901-msp430f5529

53 files changed, 1254 insertions, 1158 deletions

diff --git a/hw/bsp/board.c b/hw/bsp/board.c
new file mode 100644
index 000000000..16e713de5
--- /dev/null
+++ b/hw/bsp/board.c
@@ -0,0 +1,58 @@
+/* 
+ * 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"
+
+//--------------------------------------------------------------------+
+// MACRO TYPEDEF CONSTANT ENUM DECLARATION
+//--------------------------------------------------------------------+
+
+//#if CFG_PRINTF_TARGET == PRINTF_TARGET_UART
+//  #define retarget_getchar    board_uart_getchar
+//  #define retarget_putchar    board_uart_putchar
+//#elif CFG_PRINTF_TARGET == PRINTF_TARGET_SWO
+//  volatile int32_t ITM_RxBuffer;  // keil variable to read from SWO
+//	#define retarget_getchar    ITM_ReceiveChar
+//	#define retarget_putchar    ITM_SendChar
+//#else
+//	#error Target is not implemented yet
+//#endif
+
+//------------- IMPLEMENTATION -------------//
+
+// newlib read()/write() retarget
+
+TU_ATTR_USED int _write (int fhdl, const void *buf, size_t count)
+{
+  (void) fhdl;
+  return board_uart_write(buf, count);
+}
+
+TU_ATTR_USED int _read (int fhdl, char *buf, size_t count)
+{
+  (void) fhdl;
+  return board_uart_read((uint8_t*) buf, count);
+}
diff --git a/hw/bsp/board.h b/hw/bsp/board.h
index 15e3a2511..4c5716d96 100644
--- a/hw/bsp/board.h
+++ b/hw/bsp/board.h
@@ -42,7 +42,7 @@
 
 #include "tusb.h"
 
-#define CFG_UART_BAUDRATE    115200
+#define CFG_BOARD_UART_BAUDRATE    115200
 
 //--------------------------------------------------------------------+
 // Board Porting API
@@ -107,10 +107,10 @@ static inline void board_delay(uint32_t ms)
   }
 }
 
-static inline int8_t board_uart_getchar(void)
+static inline int board_uart_getchar(void)
 {
   uint8_t c;
-  return board_uart_read(&c, 1) ? c : (-1);
+  return board_uart_read(&c, 1) ? (int) c : (-1);
 }
 
 static inline int board_uart_putchar(uint8_t c)
diff --git a/hw/bsp/circuitplayground_bluefruit/circuitplayground_bluefruit.c b/hw/bsp/circuitplayground_bluefruit/circuitplayground_bluefruit.c
index 59085fe97..30742ab9f 100644
--- a/hw/bsp/circuitplayground_bluefruit/circuitplayground_bluefruit.c
+++ b/hw/bsp/circuitplayground_bluefruit/circuitplayground_bluefruit.c
@@ -125,15 +125,13 @@ uint32_t board_button_read(void)
 
 int board_uart_read(uint8_t* buf, int len)
 {
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
 int board_uart_write(void const * buf, int len)
 {
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
diff --git a/hw/bsp/circuitplayground_express/circuitplayground_express.c b/hw/bsp/circuitplayground_express/circuitplayground_express.c
index 355e15d39..6ca584eb3 100644
--- a/hw/bsp/circuitplayground_express/circuitplayground_express.c
+++ b/hw/bsp/circuitplayground_express/circuitplayground_express.c
@@ -116,6 +116,18 @@ uint32_t board_button_read(void)
   return gpio_get_pin_level(BUTTON_PIN);
 }
 
+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;
+}
+
 #if CFG_TUSB_OS  == OPT_OS_NONE
 volatile uint32_t system_ticks = 0;
 void SysTick_Handler (void)
diff --git a/hw/bsp/ea4088qs/ea4088qs.c b/hw/bsp/ea4088qs/ea4088qs.c
index 4e9f930d2..8adb61fda 100644
--- a/hw/bsp/ea4088qs/ea4088qs.c
+++ b/hw/bsp/ea4088qs/ea4088qs.c
@@ -131,16 +131,14 @@ uint32_t board_button_read(void)
 int board_uart_read(uint8_t* buf, int len)
 {
   //return UART_ReceiveByte(BOARD_UART_PORT);
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
 int board_uart_write(void const * buf, int len)
 {
   //UART_Send(BOARD_UART_PORT, &c, 1, BLOCKING);
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
diff --git a/hw/bsp/ea4357/ea4357.c b/hw/bsp/ea4357/ea4357.c
index 2164d3e09..c276f10d3 100644
--- a/hw/bsp/ea4357/ea4357.c
+++ b/hw/bsp/ea4357/ea4357.c
@@ -134,7 +134,7 @@ void board_init(void)
 
   UART_CFG_Type UARTConfigStruct;
   UART_ConfigStructInit(&UARTConfigStruct);
-  UARTConfigStruct.Baud_rate   = CFG_UART_BAUDRATE;
+  UARTConfigStruct.Baud_rate   = CFG_BOARD_UART_BAUDRATE;
   UARTConfigStruct.Clock_Speed = 0;
 
   UART_Init(BOARD_UART_PORT, &UARTConfigStruct);
@@ -254,16 +254,14 @@ uint32_t board_button_read(void)
 int board_uart_read(uint8_t* buf, int len)
 {
   //return UART_ReceiveByte(BOARD_UART_PORT);
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
 int board_uart_write(void const * buf, int len)
 {
   //UART_Send(BOARD_UART_PORT, &c, 1, BLOCKING);
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
diff --git a/hw/bsp/feather_m0_express/feather_m0_express.c b/hw/bsp/feather_m0_express/feather_m0_express.c
index 17576bb5a..35505add9 100644
--- a/hw/bsp/feather_m0_express/feather_m0_express.c
+++ b/hw/bsp/feather_m0_express/feather_m0_express.c
@@ -116,6 +116,18 @@ uint32_t board_button_read(void)
   return gpio_get_pin_level(BUTTON_PIN) ? 0 : 1;
 }
 
+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;
+}
+
 #if CFG_TUSB_OS  == OPT_OS_NONE
 volatile uint32_t system_ticks = 0;
 void SysTick_Handler (void)
diff --git a/hw/bsp/feather_m4_express/feather_m4_express.c b/hw/bsp/feather_m4_express/feather_m4_express.c
index a368b3038..fccd0d3af 100644
--- a/hw/bsp/feather_m4_express/feather_m4_express.c
+++ b/hw/bsp/feather_m4_express/feather_m4_express.c
@@ -105,6 +105,18 @@ uint32_t board_button_read(void)
   return gpio_get_pin_level(BUTTON_PIN) ? 0 : 1;
 }
 
+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;
+}
+
 #if CFG_TUSB_OS  == OPT_OS_NONE
 volatile uint32_t system_ticks = 0;
 
diff --git a/hw/bsp/feather_nrf52840_express/feather_nrf52840_express.c b/hw/bsp/feather_nrf52840_express/feather_nrf52840_express.c
index ed3954c82..24cc3cf2f 100644
--- a/hw/bsp/feather_nrf52840_express/feather_nrf52840_express.c
+++ b/hw/bsp/feather_nrf52840_express/feather_nrf52840_express.c
@@ -125,15 +125,13 @@ uint32_t board_button_read(void)
 
 int board_uart_read(uint8_t* buf, int len)
 {
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
 int board_uart_write(void const * buf, int len)
 {
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
diff --git a/hw/bsp/feather_stm32f405/feather_stm32f405.c b/hw/bsp/feather_stm32f405/feather_stm32f405.c
index 02c33a0a8..0bc40ece0 100644
--- a/hw/bsp/feather_stm32f405/feather_stm32f405.c
+++ b/hw/bsp/feather_stm32f405/feather_stm32f405.c
@@ -172,6 +172,18 @@ uint32_t board_button_read(void)
   return BUTTON_STATE_ACTIVE == HAL_GPIO_ReadPin(BUTTON_PORT, BUTTON_PIN);
 }
 
+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;
+}
+
 #if CFG_TUSB_OS  == OPT_OS_NONE
 volatile uint32_t system_ticks = 0;
 void SysTick_Handler (void)
diff --git a/hw/bsp/lpcxpresso11u37/lpcxpresso11u37.c b/hw/bsp/lpcxpresso11u37/lpcxpresso11u37.c
index ce093ed29..546dd3d13 100644
--- a/hw/bsp/lpcxpresso11u37/lpcxpresso11u37.c
+++ b/hw/bsp/lpcxpresso11u37/lpcxpresso11u37.c
@@ -58,8 +58,6 @@ static const PINMUX_GRP_T pinmuxing[] =
   {0, 19, (IOCON_FUNC1 | IOCON_MODE_INACT | IOCON_DIGMODE_EN)}, // UART0 TX
 };
 
-
-#if 1
 /* Setup system clocking */
 static void SystemSetupClocking(void)
 {
@@ -114,13 +112,11 @@ static void SystemSetupClocking(void)
 	/* Wait for PLL to lock */
 	while (!Chip_Clock_IsUSBPLLLocked()) {}
 }
-#endif
 
 // Invoked by startup code
 void SystemInit(void)
 {
   SystemSetupClocking();
-//  Chip_SystemInit();
   Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_RAM1);
 
   /* Enable IOCON clock */
@@ -177,15 +173,13 @@ uint32_t board_button_read(void)
 
 int board_uart_read(uint8_t* buf, int len)
 {
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
 int board_uart_write(void const * buf, int len)
 {
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
diff --git a/hw/bsp/lpcxpresso11u68/lpcxpresso11u68.c b/hw/bsp/lpcxpresso11u68/lpcxpresso11u68.c
index 4f0194972..d062de7c3 100644
--- a/hw/bsp/lpcxpresso11u68/lpcxpresso11u68.c
+++ b/hw/bsp/lpcxpresso11u68/lpcxpresso11u68.c
@@ -100,15 +100,13 @@ uint32_t board_button_read(void)
 
 int board_uart_read(uint8_t* buf, int len)
 {
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
 int board_uart_write(void const * buf, int len)
 {
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
diff --git a/hw/bsp/lpcxpresso1347/board.mk b/hw/bsp/lpcxpresso1347/board.mk
index 4e0c70392..0f9be1b56 100644
--- a/hw/bsp/lpcxpresso1347/board.mk
+++ b/hw/bsp/lpcxpresso1347/board.mk
@@ -7,7 +7,7 @@ CFLAGS += \
   -D__USE_LPCOPEN \
   -DCFG_EXAMPLE_MSC_READONLY \
   -DCFG_TUSB_MCU=OPT_MCU_LPC13XX \
-  -DCFG_TUSB_MEM_SECTION='__attribute__((section(".data.$$RAM3")))' \
+  -DCFG_TUSB_MEM_SECTION='__attribute__((section(".data.$$RAM2")))' \
   -DCFG_TUSB_MEM_ALIGN='__attribute__((aligned(64)))' 
 
 # startup.c and lpc_types.h cause following errors
diff --git a/hw/bsp/lpcxpresso1347/lpcxpresso1347.c b/hw/bsp/lpcxpresso1347/lpcxpresso1347.c
index d389eb798..cc1a8deae 100644
--- a/hw/bsp/lpcxpresso1347/lpcxpresso1347.c
+++ b/hw/bsp/lpcxpresso1347/lpcxpresso1347.c
@@ -130,14 +130,12 @@ uint32_t board_button_read(void)
 
 int board_uart_read(uint8_t* buf, int len)
 {
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
 int board_uart_write(void const * buf, int len)
 {
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
diff --git a/hw/bsp/lpcxpresso1549/board.mk b/hw/bsp/lpcxpresso1549/board.mk
new file mode 100644
index 000000000..929c63a8d
--- /dev/null
+++ b/hw/bsp/lpcxpresso1549/board.mk
@@ -0,0 +1,45 @@
+CFLAGS += \
+  -mthumb \
+  -mabi=aapcs \
+  -mcpu=cortex-m3 \
+  -nostdlib \
+  -DCORE_M3 \
+  -D__USE_LPCOPEN \
+  -DCFG_EXAMPLE_MSC_READONLY \
+  -DCFG_TUSB_MCU=OPT_MCU_LPC15XX \
+  -DCFG_TUSB_MEM_ALIGN='__attribute__((aligned(64)))' 
+
+# mcu driver cause following warnings
+CFLAGS += -Wno-error=strict-prototypes -Wno-error=unused-parameter -Wno-error=unused-variable
+
+MCU_DIR = hw/mcu/nxp/lpc_driver/lpc15xx/lpc_chip_15xx
+
+# All source paths should be relative to the top level.
+LD_FILE = hw/bsp/$(BOARD)/lpc1549.ld
+
+SRC_C += \
+	$(MCU_DIR)/../gcc/cr_startup_lpc15xx.c \
+	$(MCU_DIR)/src/chip_15xx.c \
+	$(MCU_DIR)/src/clock_15xx.c \
+	$(MCU_DIR)/src/gpio_15xx.c \
+	$(MCU_DIR)/src/iocon_15xx.c \
+	$(MCU_DIR)/src/swm_15xx.c \
+	$(MCU_DIR)/src/sysctl_15xx.c \
+	$(MCU_DIR)/src/sysinit_15xx.c
+
+INC += \
+	$(TOP)/$(MCU_DIR)/inc
+
+# For TinyUSB port source
+VENDOR = nxp
+CHIP_FAMILY = lpc_ip3511
+
+# For freeRTOS port source
+FREERTOS_PORT = ARM_CM3
+
+# For flash-jlink target
+JLINK_DEVICE = LPC1549
+JLINK_IF = swd
+
+# flash using jlink
+flash: flash-jlink
diff --git a/hw/bsp/lpcxpresso1549/lpc1549.ld b/hw/bsp/lpcxpresso1549/lpc1549.ld
new file mode 100644
index 000000000..6dd12ade1
--- /dev/null
+++ b/hw/bsp/lpcxpresso1549/lpc1549.ld
@@ -0,0 +1,246 @@
+/*
+ * GENERATED FILE - DO NOT EDIT
+ * Copyright (c) 2008-2013 Code Red Technologies Ltd,
+ * Copyright 2015, 2018-2019 NXP
+ * (c) NXP Semiconductors 2013-2019
+ * Generated linker script file for LPC1549
+ * Created from linkscript.ldt by FMCreateLinkLibraries
+ * Using Freemarker v2.3.23
+ * MCUXpresso IDE v11.0.0 [Build 2516] [2019-06-05] on Oct 3, 2019 2:55:18 PM
+ */
+
+
+MEMORY
+{
+  /* Define each memory region */
+  MFlash256 (rx) : ORIGIN = 0x0, LENGTH = 0x40000 /* 256K bytes (alias Flash) */  
+  Ram0_16 (rwx) : ORIGIN = 0x2000000, LENGTH = 0x4000 /* 16K bytes (alias RAM) */  
+  Ram1_16 (rwx) : ORIGIN = 0x2004000, LENGTH = 0x4000 /* 16K bytes (alias RAM2) */  
+  Ram2_4 (rwx) : ORIGIN = 0x2008000, LENGTH = 0x1000 /* 4K bytes (alias RAM3) */  
+}
+
+  /* Define a symbol for the top of each memory region */
+  __base_MFlash256 = 0x0  ; /* MFlash256 */  
+  __base_Flash = 0x0 ; /* Flash */  
+  __top_MFlash256 = 0x0 + 0x40000 ; /* 256K bytes */  
+  __top_Flash = 0x0 + 0x40000 ; /* 256K bytes */  
+  __base_Ram0_16 = 0x2000000  ; /* Ram0_16 */  
+  __base_RAM = 0x2000000 ; /* RAM */  
+  __top_Ram0_16 = 0x2000000 + 0x4000 ; /* 16K bytes */  
+  __top_RAM = 0x2000000 + 0x4000 ; /* 16K bytes */  
+  __base_Ram1_16 = 0x2004000  ; /* Ram1_16 */  
+  __base_RAM2 = 0x2004000 ; /* RAM2 */  
+  __top_Ram1_16 = 0x2004000 + 0x4000 ; /* 16K bytes */  
+  __top_RAM2 = 0x2004000 + 0x4000 ; /* 16K bytes */  
+  __base_Ram2_4 = 0x2008000  ; /* Ram2_4 */  
+  __base_RAM3 = 0x2008000 ; /* RAM3 */  
+  __top_Ram2_4 = 0x2008000 + 0x1000 ; /* 4K bytes */  
+  __top_RAM3 = 0x2008000 + 0x1000 ; /* 4K bytes */  
+
+ENTRY(ResetISR)
+
+SECTIONS
+{
+     /* MAIN TEXT SECTION */
+    .text : ALIGN(4)
+    {
+        FILL(0xff)
+        __vectors_start__ = ABSOLUTE(.) ;
+        KEEP(*(.isr_vector))
+        /* Global Section Table */
+        . = ALIGN(4) ;
+        __section_table_start = .;
+        __data_section_table = .;
+        LONG(LOADADDR(.data));
+        LONG(    ADDR(.data));
+        LONG(  SIZEOF(.data));
+        LONG(LOADADDR(.data_RAM2));
+        LONG(    ADDR(.data_RAM2));
+        LONG(  SIZEOF(.data_RAM2));
+        LONG(LOADADDR(.data_RAM3));
+        LONG(    ADDR(.data_RAM3));
+        LONG(  SIZEOF(.data_RAM3));
+        __data_section_table_end = .;
+        __bss_section_table = .;
+        LONG(    ADDR(.bss));
+        LONG(  SIZEOF(.bss));
+        LONG(    ADDR(.bss_RAM2));
+        LONG(  SIZEOF(.bss_RAM2));
+        LONG(    ADDR(.bss_RAM3));
+        LONG(  SIZEOF(.bss_RAM3));
+        __bss_section_table_end = .;
+        __section_table_end = . ;
+        /* End of Global Section Table */
+
+        *(.after_vectors*)
+
+    } > MFlash256
+
+    .text : ALIGN(4)
+    {
+       *(.text*)
+       *(.rodata .rodata.* .constdata .constdata.*)
+       . = ALIGN(4);
+    } > MFlash256
+    /*
+     * for exception handling/unwind - some Newlib functions (in common
+     * with C++ and STDC++) use this. 
+     */
+    .ARM.extab : ALIGN(4) 
+    {
+        *(.ARM.extab* .gnu.linkonce.armextab.*)
+    } > MFlash256
+
+    __exidx_start = .;
+
+    .ARM.exidx : ALIGN(4)
+    {
+        *(.ARM.exidx* .gnu.linkonce.armexidx.*)
+    } > MFlash256
+    __exidx_end = .;
+ 
+    _etext = .;
+        
+    /* DATA section for Ram1_16 */
+
+    .data_RAM2 : ALIGN(4)
+    {
+        FILL(0xff)
+        PROVIDE(__start_data_RAM2 = .) ;
+        *(.ramfunc.$RAM2)
+        *(.ramfunc.$Ram1_16)
+        *(.data.$RAM2)
+        *(.data.$Ram1_16)
+        *(.data.$RAM2.*)
+        *(.data.$Ram1_16.*)
+        . = ALIGN(4) ;
+        PROVIDE(__end_data_RAM2 = .) ;
+     } > Ram1_16 AT>MFlash256
+    /* DATA section for Ram2_4 */
+
+    .data_RAM3 : ALIGN(4)
+    {
+        FILL(0xff)
+        PROVIDE(__start_data_RAM3 = .) ;
+        *(.ramfunc.$RAM3)
+        *(.ramfunc.$Ram2_4)
+        *(.data.$RAM3)
+        *(.data.$Ram2_4)
+        *(.data.$RAM3.*)
+        *(.data.$Ram2_4.*)
+        . = ALIGN(4) ;
+        PROVIDE(__end_data_RAM3 = .) ;
+     } > Ram2_4 AT>MFlash256
+    /* MAIN DATA SECTION */
+    .uninit_RESERVED (NOLOAD) :
+    {
+        . = ALIGN(4) ;
+        KEEP(*(.bss.$RESERVED*))
+       . = ALIGN(4) ;
+        _end_uninit_RESERVED = .;
+    } > Ram0_16
+
+    /* Main DATA section (Ram0_16) */
+    .data : ALIGN(4)
+    {
+       FILL(0xff)
+       _data = . ;
+       *(vtable)
+       *(.ramfunc*)
+       *(.data*)
+       . = ALIGN(4) ;
+       _edata = . ;
+    } > Ram0_16 AT>MFlash256
+
+    /* BSS section for Ram1_16 */
+    .bss_RAM2 :
+    {
+       . = ALIGN(4) ;
+       PROVIDE(__start_bss_RAM2 = .) ;
+       *(.bss.$RAM2)
+       *(.bss.$Ram1_16)
+       *(.bss.$RAM2.*)
+       *(.bss.$Ram1_16.*)
+       . = ALIGN (. != 0 ? 4 : 1) ; /* avoid empty segment */
+       PROVIDE(__end_bss_RAM2 = .) ;
+    } > Ram1_16
+
+    /* BSS section for Ram2_4 */
+    .bss_RAM3 :
+    {
+       . = ALIGN(4) ;
+       PROVIDE(__start_bss_RAM3 = .) ;
+       *(.bss.$RAM3)
+       *(.bss.$Ram2_4)
+       *(.bss.$RAM3.*)
+       *(.bss.$Ram2_4.*)
+       . = ALIGN (. != 0 ? 4 : 1) ; /* avoid empty segment */
+       PROVIDE(__end_bss_RAM3 = .) ;
+    } > Ram2_4
+
+    /* MAIN BSS SECTION */
+    .bss :
+    {
+        . = ALIGN(4) ;
+        _bss = .;
+        *(.bss*)
+        *(COMMON)
+        . = ALIGN(4) ;
+        _ebss = .;
+        PROVIDE(end = .);
+    } > Ram0_16
+
+    /* NOINIT section for Ram1_16 */
+    .noinit_RAM2 (NOLOAD) :
+    {
+       . = ALIGN(4) ;
+       *(.noinit.$RAM2)
+       *(.noinit.$Ram1_16)
+       *(.noinit.$RAM2.*)
+       *(.noinit.$Ram1_16.*)
+       . = ALIGN(4) ;
+    } > Ram1_16
+
+    /* NOINIT section for Ram2_4 */
+    .noinit_RAM3 (NOLOAD) :
+    {
+       . = ALIGN(4) ;
+       *(.noinit.$RAM3)
+       *(.noinit.$Ram2_4)
+       *(.noinit.$RAM3.*)
+       *(.noinit.$Ram2_4.*)
+       . = ALIGN(4) ;
+    } > Ram2_4
+
+    /* DEFAULT NOINIT SECTION */
+    .noinit (NOLOAD):
+    {
+         . = ALIGN(4) ;
+        _noinit = .;
+        *(.noinit*)
+         . = ALIGN(4) ;
+        _end_noinit = .;
+    } > Ram0_16
+    PROVIDE(_pvHeapStart = DEFINED(__user_heap_base) ? __user_heap_base : .);
+    PROVIDE(_vStackTop = DEFINED(__user_stack_top) ? __user_stack_top : __top_Ram0_16 - 0);
+
+    /* ## Create checksum value (used in startup) ## */
+    PROVIDE(__valid_user_code_checksum = 0 - 
+                                         (_vStackTop 
+                                         + (ResetISR + 1) 
+                                         + (NMI_Handler + 1) 
+                                         + (HardFault_Handler + 1) 
+                                         + (( DEFINED(MemManage_Handler) ? MemManage_Handler : 0 ) + 1)   /* MemManage_Handler may not be defined */
+                                         + (( DEFINED(BusFault_Handler) ? BusFault_Handler : 0 ) + 1)     /* BusFault_Handler may not be defined */
+                                         + (( DEFINED(UsageFault_Handler) ? UsageFault_Handler : 0 ) + 1) /* UsageFault_Handler may not be defined */
+                                         ) );
+
+    /* Provide basic symbols giving location and size of main text
+     * block, including initial values of RW data sections. Note that
+     * these will need extending to give a complete picture with
+     * complex images (e.g multiple Flash banks).
+     */
+    _image_start = LOADADDR(.text);
+    _image_end = LOADADDR(.data) + SIZEOF(.data);
+    _image_size = _image_end - _image_start;
+}
\ No newline at end of file
diff --git a/hw/bsp/lpcxpresso1549/lpcxpresso1549.c b/hw/bsp/lpcxpresso1549/lpcxpresso1549.c
new file mode 100644
index 000000000..5f806d851
--- /dev/null
+++ b/hw/bsp/lpcxpresso1549/lpcxpresso1549.c
@@ -0,0 +1,124 @@
+/* 
+ * 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 "chip.h"
+#include "../board.h"
+
+#define LED_PORT      0
+#define LED_PIN       25
+
+// Wake Switch
+#define BUTTON_PORT   0
+#define BUTTON_PIN    17
+
+/* System oscillator rate and RTC oscillator rate */
+const uint32_t OscRateIn = 12000000;
+const uint32_t RTCOscRateIn = 32768;
+
+/* Pin muxing table, only items that need changing from their default pin
+   state are in this table. */
+static const PINMUX_GRP_T pinmuxing[] =
+{
+  {1,  11,  (IOCON_MODE_PULLDOWN | IOCON_DIGMODE_EN)},	/* PIO1_11-ISP_1 (VBUS) */
+};
+
+// Invoked by startup code
+void SystemInit(void)
+{
+  Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_IOCON);
+  Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_SWM);
+  Chip_SYSCTL_PeriphReset(RESET_IOCON);
+
+  // Pin Mux
+  Chip_IOCON_SetPinMuxing(LPC_IOCON, pinmuxing, sizeof(pinmuxing) / sizeof(PINMUX_GRP_T));
+
+  Chip_SetupXtalClocking();
+}
+
+void board_init(void)
+{
+  SystemCoreClockUpdate();
+
+#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
+
+  Chip_GPIO_Init(LPC_GPIO);
+
+  // LED
+  Chip_GPIO_SetPinDIROutput(LPC_GPIO, LED_PORT, LED_PIN);
+
+  // Button
+  Chip_GPIO_SetPinDIRInput(LPC_GPIO, BUTTON_PORT, BUTTON_PIN);
+
+  // USB: Setup PLL clock, and power
+  Chip_SWM_MovablePortPinAssign(SWM_USB_VBUS_I, 1, 11);
+  Chip_USB_Init();
+}
+
+//--------------------------------------------------------------------+
+// Board porting API
+//--------------------------------------------------------------------+
+
+#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
+
+void board_led_write(bool state)
+{
+  Chip_GPIO_SetPinState(LPC_GPIO, LED_PORT, LED_PIN, state);
+}
+
+uint32_t board_button_read(void)
+{
+  // active low
+  return Chip_GPIO_GetPinState(LPC_GPIO, BUTTON_PORT, BUTTON_PIN) ? 0 : 1;
+}
+
+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/lpcxpresso1769/lpcxpresso1769.c b/hw/bsp/lpcxpresso1769/lpcxpresso1769.c
index bc6b1da7e..e2d5f6cf2 100644
--- a/hw/bsp/lpcxpresso1769/lpcxpresso1769.c
+++ b/hw/bsp/lpcxpresso1769/lpcxpresso1769.c
@@ -116,7 +116,7 @@ void board_init(void)
 
 	UART_CFG_Type UARTConfigStruct;
   UART_ConfigStructInit(&UARTConfigStruct);
-	UARTConfigStruct.Baud_rate = CFG_UART_BAUDRATE;
+	UARTConfigStruct.Baud_rate = CFG_BOARD_UART_BAUDRATE;
 
 	UART_Init(BOARD_UART_PORT, &UARTConfigStruct);
 	UART_TxCmd(BOARD_UART_PORT, ENABLE); // Enable UART Transmit
@@ -160,16 +160,14 @@ uint32_t board_button_read(void)
 int board_uart_read(uint8_t* buf, int len)
 {
 //  return UART_ReceiveByte(BOARD_UART_PORT);
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
 int board_uart_write(void const * buf, int len)
 {
 //  UART_Send(BOARD_UART_PORT, &c, 1, BLOCKING);
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
diff --git a/hw/bsp/lpcxpresso51u68/lpcxpresso51u68.c b/hw/bsp/lpcxpresso51u68/lpcxpresso51u68.c
index df915a720..11b190b92 100644
--- a/hw/bsp/lpcxpresso51u68/lpcxpresso51u68.c
+++ b/hw/bsp/lpcxpresso51u68/lpcxpresso51u68.c
@@ -144,15 +144,13 @@ uint32_t board_button_read(void)
 
 int board_uart_read(uint8_t* buf, int len)
 {
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
 int board_uart_write(void const * buf, int len)
 {
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
diff --git a/hw/bsp/lpcxpresso54114/lpcxpresso54114.c b/hw/bsp/lpcxpresso54114/lpcxpresso54114.c
index 090c1a95e..d86af58c8 100644
--- a/hw/bsp/lpcxpresso54114/lpcxpresso54114.c
+++ b/hw/bsp/lpcxpresso54114/lpcxpresso54114.c
@@ -145,15 +145,13 @@ uint32_t board_button_read(void)
 
 int board_uart_read(uint8_t* buf, int len)
 {
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
 int board_uart_write(void const * buf, int len)
 {
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
diff --git a/hw/bsp/lpcxpresso55s69/lpcxpresso55s69.c b/hw/bsp/lpcxpresso55s69/lpcxpresso55s69.c
index 41e3028f1..e595634a7 100644
--- a/hw/bsp/lpcxpresso55s69/lpcxpresso55s69.c
+++ b/hw/bsp/lpcxpresso55s69/lpcxpresso55s69.c
@@ -187,15 +187,13 @@ uint32_t board_button_read(void)
 
 int board_uart_read(uint8_t* buf, int len)
 {
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
 int board_uart_write(void const * buf, int len)
 {
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
diff --git a/hw/bsp/mbed1768/mbed1768.c b/hw/bsp/mbed1768/mbed1768.c
index 05fb4ef35..9f1ed12ef 100644
--- a/hw/bsp/mbed1768/mbed1768.c
+++ b/hw/bsp/mbed1768/mbed1768.c
@@ -108,7 +108,7 @@ void board_init(void)
 
 	UART_CFG_Type UARTConfigStruct;
   UART_ConfigStructInit(&UARTConfigStruct);
-	UARTConfigStruct.Baud_rate = CFG_UART_BAUDRATE;
+	UARTConfigStruct.Baud_rate = CFG_BOARD_UART_BAUDRATE;
 
 	UART_Init(BOARD_UART_PORT, &UARTConfigStruct);
 	UART_TxCmd(BOARD_UART_PORT, ENABLE); // Enable UART Transmit
@@ -152,16 +152,14 @@ uint32_t board_button_read(void)
 int board_uart_read(uint8_t* buf, int len)
 {
 //  return UART_ReceiveByte(BOARD_UART_PORT);
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
 int board_uart_write(void const * buf, int len)
 {
 //  UART_Send(BOARD_UART_PORT, &c, 1, BLOCKING);
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
diff --git a/hw/bsp/mcb1800/mcb1800.c b/hw/bsp/mcb1800/mcb1800.c
index 6f1ef4244..deb17f113 100644
--- a/hw/bsp/mcb1800/mcb1800.c
+++ b/hw/bsp/mcb1800/mcb1800.c
@@ -28,14 +28,13 @@
 #include "../board.h"
 
 // PD_10
-#define LED_PORT  6
-#define LED_PIN   24
+#define LED_PORT      6
+#define LED_PIN       24
 
 // P4_0
 #define BUTTON_PORT   2
 #define BUTTON_PIN    0
 
-
 //--------------------------------------------------------------------+
 // MACRO TYPEDEF CONSTANT ENUM DECLARATION
 //--------------------------------------------------------------------+
@@ -118,7 +117,7 @@ void board_init(void)
 
   UART_CFG_Type UARTConfigStruct;
   UART_ConfigStructInit(&UARTConfigStruct);
-  UARTConfigStruct.Baud_rate   = CFG_UART_BAUDRATE;
+  UARTConfigStruct.Baud_rate   = CFG_BOARD_UART_BAUDRATE;
   UARTConfigStruct.Clock_Speed = 0;
 
   UART_Init(BOARD_UART_PORT, &UARTConfigStruct);
@@ -191,16 +190,14 @@ uint32_t board_button_read(void)
 int board_uart_read(uint8_t* buf, int len)
 {
   //return UART_ReceiveByte(BOARD_UART_PORT);
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
 int board_uart_write(void const * buf, int len)
 {
   //UART_Send(BOARD_UART_PORT, &c, 1, BLOCKING);
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
diff --git a/hw/bsp/metro_m0_express/metro_m0_express.c b/hw/bsp/metro_m0_express/metro_m0_express.c
index 17576bb5a..35505add9 100644
--- a/hw/bsp/metro_m0_express/metro_m0_express.c
+++ b/hw/bsp/metro_m0_express/metro_m0_express.c
@@ -116,6 +116,18 @@ uint32_t board_button_read(void)
   return gpio_get_pin_level(BUTTON_PIN) ? 0 : 1;
 }
 
+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;
+}
+
 #if CFG_TUSB_OS  == OPT_OS_NONE
 volatile uint32_t system_ticks = 0;
 void SysTick_Handler (void)
diff --git a/hw/bsp/metro_m4_express/metro_m4_express.c b/hw/bsp/metro_m4_express/metro_m4_express.c
index 583a4dfe6..08559e57c 100644
--- a/hw/bsp/metro_m4_express/metro_m4_express.c
+++ b/hw/bsp/metro_m4_express/metro_m4_express.c
@@ -105,6 +105,18 @@ uint32_t board_button_read(void)
   return gpio_get_pin_level(BUTTON_PIN) ? 0 : 1;
 }
 
+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;
+}
+
 #if CFG_TUSB_OS  == OPT_OS_NONE
 volatile uint32_t system_ticks = 0;
 
diff --git a/hw/bsp/ngx4330/ngx4330.c b/hw/bsp/ngx4330/ngx4330.c
index 0e39ea711..669180026 100644
--- a/hw/bsp/ngx4330/ngx4330.c
+++ b/hw/bsp/ngx4330/ngx4330.c
@@ -132,7 +132,7 @@ void board_init(void)
 
   UART_CFG_Type UARTConfigStruct;
   UART_ConfigStructInit(&UARTConfigStruct);
-  UARTConfigStruct.Baud_rate   = CFG_UART_BAUDRATE;
+  UARTConfigStruct.Baud_rate   = CFG_BOARD_UART_BAUDRATE;
   UARTConfigStruct.Clock_Speed = 0;
 
   UART_Init(BOARD_UART_PORT, &UARTConfigStruct);
@@ -236,16 +236,14 @@ uint32_t board_button_read(void)
 int board_uart_read(uint8_t* buf, int len)
 {
   //return UART_ReceiveByte(BOARD_UART_PORT);
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
 int board_uart_write(void const * buf, int len)
 {
   //UART_Send(BOARD_UART_PORT, &c, 1, BLOCKING);
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
diff --git a/hw/bsp/pca10056/board.mk b/hw/bsp/pca10056/board.mk
index c0616abee..abe0d642c 100644
--- a/hw/bsp/pca10056/board.mk
+++ b/hw/bsp/pca10056/board.mk
@@ -24,6 +24,7 @@ LDFLAGS += -L$(TOP)/hw/mcu/nordic/nrfx/mdk
 
 SRC_C += \
 	hw/mcu/nordic/nrfx/drivers/src/nrfx_power.c \
+	hw/mcu/nordic/nrfx/drivers/src/nrfx_uarte.c \
 	hw/mcu/nordic/nrfx/mdk/system_nrf52840.c \
 
 INC += \
diff --git a/hw/bsp/pca10056/pca10056.c b/hw/bsp/pca10056/pca10056.c
index 57426732c..31fd5e9be 100644
--- a/hw/bsp/pca10056/pca10056.c
+++ b/hw/bsp/pca10056/pca10056.c
@@ -29,6 +29,7 @@
 #include "nrfx.h"
 #include "nrfx/hal/nrf_gpio.h"
 #include "nrfx/drivers/include/nrfx_power.h"
+#include "nrfx/drivers/include/nrfx_uarte.h"
 
 #ifdef SOFTDEVICE_PRESENT
 #include "nrf_sdm.h"
@@ -44,6 +45,12 @@
 #define BUTTON_PIN            11
 #define BUTTON_STATE_ACTIVE   0
 
+#define UART_RX_PIN           8
+#define UART_TX_PIN           6
+
+static nrfx_uarte_t _uart_id = NRFX_UARTE_INSTANCE(0);
+//static void uart_handler(nrfx_uart_event_t const * p_event, void* p_context);
+
 // tinyusb function that handles power event (detected, ready, removed)
 // We must call it within SD's SOC event handler, or set it as power event handler if SD is not enabled.
 extern void tusb_hal_nrf_power_event(uint32_t event);
@@ -69,6 +76,22 @@ void board_init(void)
   SysTick_Config(SystemCoreClock/1000);
 #endif
 
+  // UART
+  nrfx_uarte_config_t uart_cfg =
+  {
+    .pseltxd   = UART_TX_PIN,
+    .pselrxd   = UART_RX_PIN,
+    .pselcts   = NRF_UARTE_PSEL_DISCONNECTED,
+    .pselrts   = NRF_UARTE_PSEL_DISCONNECTED,
+    .p_context = NULL,
+    .hwfc      = NRF_UARTE_HWFC_DISABLED,
+    .parity    = NRF_UARTE_PARITY_EXCLUDED,
+    .baudrate  = NRF_UARTE_BAUDRATE_115200, // CFG_BOARD_UART_BAUDRATE
+    .interrupt_priority = 7
+  };
+
+  nrfx_uarte_init(&_uart_id, &uart_cfg, NULL); //uart_handler);
+
 #if TUSB_OPT_DEVICE_ENABLED
   // Priorities 0, 1, 4 (nRF52) are reserved for SoftDevice
   // 2 is highest for application
@@ -124,18 +147,21 @@ uint32_t board_button_read(void)
   return BUTTON_STATE_ACTIVE == nrf_gpio_pin_read(BUTTON_PIN);
 }
 
+//static void uart_handler(nrfx_uart_event_t const * p_event, void* p_context)
+//{
+//
+//}
+
 int board_uart_read(uint8_t* buf, int len)
 {
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
+//  return NRFX_SUCCESS == nrfx_uart_rx(&_uart_id, buf, (size_t) len) ? len : 0;
 }
 
 int board_uart_write(void const * buf, int len)
 {
-  (void) buf;
-  (void) len;
-  return 0;
+  return (NRFX_SUCCESS == nrfx_uarte_tx(&_uart_id, (uint8_t const*) buf, (size_t) len)) ? len : 0;
 }
 
 #if CFG_TUSB_OS == OPT_OS_NONE
diff --git a/hw/bsp/pca10059/pca10059.c b/hw/bsp/pca10059/pca10059.c
index b18c1d231..69246f4a6 100644
--- a/hw/bsp/pca10059/pca10059.c
+++ b/hw/bsp/pca10059/pca10059.c
@@ -123,15 +123,13 @@ uint32_t board_button_read(void)
 
 int board_uart_read(uint8_t* buf, int len)
 {
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
 int board_uart_write(void const * buf, int len)
 {
-  (void) buf;
-  (void) len;
+  (void) buf; (void) len;
   return 0;
 }
 
diff --git a/hw/bsp/printf_retarget.c b/hw/bsp/printf_retarget.c
deleted file mode 100644
index 707a1e099..000000000
--- a/hw/bsp/printf_retarget.c
+++ /dev/null
@@ -1,183 +0,0 @@
-/* 
- * 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 "board.h"
-
-#if CFG_PRINTF_TARGET != PRINTF_TARGET_SEMIHOST
-
-#if CFG_PRINTF_TARGET == PRINTF_TARGET_UART
-  #define retarget_getchar()     board_uart_getchar()
-  #define retarget_putchar(c)    board_uart_putchar(c);
-#elif CFG_PRINTF_TARGET == PRINTF_TARGET_SWO
-  volatile int32_t ITM_RxBuffer;  // keil variable to read from SWO
-	#define retarget_getchar()     ITM_ReceiveChar()
-	#define retarget_putchar(c)    ITM_SendChar(c)
-#else
-	#error Target is not implemented yet
-#endif
-
-//--------------------------------------------------------------------+
-// LPCXPRESSO / RED SUITE
-//--------------------------------------------------------------------+
-#if defined __CODE_RED
-
-#if CFG_PRINTF_TARGET == PRINTF_TARGET_SWO
-  #error author does not know how to retarget SWO with lpcxpresso/red-suite
-#endif
-
-// Called by bottom level of printf routine within RedLib C library to write
-// a character. With the default semihosting stub, this would write the character
-// to the debugger console window . But this version writes
-// the character to the UART.
-int __sys_write (int iFileHandle, char *buf, int length)
-{
-  (void) iFileHandle;
-
-  for (int i=0; i<length; i++)
-  {
-    if (buf[i] == '\n') retarget_putchar('\r');
-
-    retarget_putchar( buf[i] );
-  }
-
-  return length;
-}
-
-// Called by bottom level of scanf routine within RedLib C library to read
-// a character. With the default semihosting stub, this would read the character
-// from the debugger console window (which acts as stdin). But this version reads
-// the character from the UART.
-int __sys_readc (void)
-{
-	return (int) retarget_getchar();
-}
-
-#elif defined __SES_ARM && 0
-#include <stdarg.h>
-#include <stdio.h>
-#include "__libc.h"
-
-int printf(const char *fmt,...) {
-  char buffer[128];
-  va_list args;
-  va_start (args, fmt);
-  int n = vsnprintf(buffer, sizeof(buffer), fmt, args);
-  
-  for(int i=0; i < n; i++)
-  {
-    retarget_putchar( buffer[i] );
-  }
-
-  va_end(args);
-  return n;
-}
-
-int __putchar(int ch, __printf_tag_ptr ctx) 
-{
-  (void)ctx;
-  retarget_putchar( (uint8_t) ch );
-  return 1;
-}
-
-int __getchar()
-{
-  return retarget_getchar();
-}
-
-//--------------------------------------------------------------------+
-// KEIL
-//--------------------------------------------------------------------+
-#elif defined __CC_ARM // keil
-
-struct __FILE {
-  uint32_t handle;
-};
-
-void _ttywrch(int ch)
-{
-  if ( ch == '\n' ) retarget_putchar('\r');
-
-  retarget_putchar(ch);
-}
-
-int fgetc(FILE *f)
-{
-  return retarget_getchar();
-}
-
-int fputc(int ch, FILE *f)
-{
-  _ttywrch(ch);
-  return ch;
-}
-
-//--------------------------------------------------------------------+
-// IAR
-//--------------------------------------------------------------------+
-#elif defined __ICCARM__ // TODO could not able to retarget to UART with IAR
-
-#if CFG_PRINTF_TARGET == PRINTF_TARGET_UART
-#include <stddef.h>
-
-size_t __write(int handle, const unsigned char *buf, size_t length)
-{
-  /* Check for the command to flush all handles */
-  if (handle == -1) return 0;
-
-  /* Check for stdout and stderr (only necessary if FILE descriptors are enabled.) */
-  if (handle != 1 && handle != 2) return -1;
-
-  for (size_t i=0; i<length; i++)
-  {
-    if (buf[i] == '\n') retarget_putchar('\r');
-
-    retarget_putchar( buf[i] );
-  }
-
-  return length;
-}
-
-size_t __read(int handle, unsigned char *buf, size_t bufSize)
-{
-  /* Check for stdin (only necessary if FILE descriptors are enabled) */
-  if (handle != 0) return -1;
-
-  size_t i;
-  for (i=0; i<bufSize; i++)
-  {
-    int8_t ch = board_uart_getchar();
-    if (ch == -1) break;
-    buf[i] = ch;
-  }
-
-  return i;
-}
-
-#endif
-
-#endif
-
-#endif // CFG_PRINTF_TARGET != PRINTF_TARGET_SEMIHOST
diff --git a/hw/bsp/pyboardv11/pyboardv11.c b/hw/bsp/pyboardv11/pyboardv11.c
index 85c0eb58f..2d4c732cc 100644
--- a/hw/bsp/pyboardv11/pyboardv11.c
+++ b/hw/bsp/pyboardv11/pyboardv11.c
@@ -174,6 +174,18 @@ uint32_t board_button_read(void)
   return BUTTON_STATE_ACTIVE == HAL_GPIO_ReadPin(BUTTON_PORT, BUTTON_PIN);
 }
 
+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;
+}
+
 #if CFG_TUSB_OS  == OPT_OS_NONE
 volatile uint32_t system_ticks = 0;
 void SysTick_Handler (void)
diff --git a/hw/bsp/spresense/board.mk b/hw/bsp/spresense/board.mk
new file mode 100644
index 000000000..16421686a
--- /dev/null
+++ b/hw/bsp/spresense/board.mk
@@ -0,0 +1,47 @@
+SPRESENSE_SDK = $(TOP)/hw/mcu/sony/cxd56/spresense-exported-sdk
+
+INC += \
+	$(SPRESENSE_SDK)/nuttx/include \
+	$(SPRESENSE_SDK)/nuttx/arch \
+	$(SPRESENSE_SDK)/nuttx/arch/chip \
+	$(SPRESENSE_SDK)/sdk/bsp/include \
+	$(SPRESENSE_SDK)/sdk/bsp/include/sdk \
+
+CFLAGS += \
+	-DCONFIG_WCHAR_BUILTIN \
+	-DCONFIG_HAVE_DOUBLE \
+	-Dmain=spresense_main \
+	-pipe \
+	-std=gnu11 \
+	-mcpu=cortex-m4 \
+	-mthumb \
+	-mfpu=fpv4-sp-d16 \
+	-mfloat-abi=hard \
+	-mabi=aapcs \
+	-fno-builtin \
+	-fno-strength-reduce \
+	-fomit-frame-pointer \
+	-DCFG_TUSB_MCU=OPT_MCU_CXD56 \
+
+LIBS += \
+	$(SPRESENSE_SDK)/sdk/libs/libapps.a \
+	$(SPRESENSE_SDK)/sdk/libs/libsdk.a \
+
+LD_FILE = hw/mcu/sony/cxd56/spresense-exported-sdk/nuttx/build/ramconfig.ld
+
+LDFLAGS += \
+	-Xlinker --entry=__start \
+	-nostartfiles \
+	-nodefaultlibs \
+	-Wl,--defsym,__stack=_vectors+786432 \
+	-Wl,--gc-sections \
+	-u spresense_main \
+
+# For TinyUSB port source
+VENDOR = sony
+CHIP_FAMILY = cxd56
+
+# flash
+flash: 
+	$(SPRESENSE_SDK)/sdk/tools/linux/mkspk -c 2 $(BUILD)/spresense-firmware.elf nuttx $(BUILD)/spresense-firmware.spk
+	$(SPRESENSE_SDK)/sdk/tools/flash.sh -c /dev/ttyUSB0 $(BUILD)/spresense-firmware.spk
diff --git a/hw/bsp/spresense/board_spresense.c b/hw/bsp/spresense/board_spresense.c
new file mode 100644
index 000000000..256bccd15
--- /dev/null
+++ b/hw/bsp/spresense/board_spresense.c
@@ -0,0 +1,105 @@
+/* 
+ * The MIT License (MIT)
+ *
+ * Copyright 2019 Sony Semiconductor Solutions Corporation
+ *
+ * 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 <sys/boardctl.h>
+#include <nuttx/arch.h>
+#include <arch/board/board.h>
+#include <arch/chip/pin.h>
+
+#include "bsp/board.h"
+
+/*------------------------------------------------------------------*/
+/* MACRO TYPEDEF CONSTANT ENUM
+ *------------------------------------------------------------------*/
+#define LED_PIN         PIN_I2S1_BCK
+
+#define BUTTON_PIN      PIN_HIF_IRQ_OUT
+
+// Initialize on-board peripherals : led, button, uart and USB
+void board_init(void)
+{
+  boardctl(BOARDIOC_INIT, 0);
+
+  board_gpio_write(PIN_I2S1_BCK, -1);
+  board_gpio_config(PIN_I2S1_BCK, 0, false, true, PIN_FLOAT);
+
+  board_gpio_write(PIN_HIF_IRQ_OUT, -1);
+  board_gpio_config(PIN_HIF_IRQ_OUT, 0, true, true, PIN_FLOAT);
+};
+
+//--------------------------------------------------------------------+
+// Board porting API
+//--------------------------------------------------------------------+
+
+// Turn LED on or off
+void board_led_write(bool state)
+{
+  board_gpio_write(LED_PIN, state);
+}
+
+// Get the current state of button
+// a '1' means active (pressed), a '0' means inactive.
+uint32_t board_button_read(void)
+{
+  if (board_gpio_read(BUTTON_PIN)) 
+  {
+    return 0;
+  }
+
+  return 1;
+}
+
+// Get characters from UART
+int board_uart_read(uint8_t *buf, int len)
+{
+  int r = read(0, buf, len);
+
+  return r;
+}
+
+// Send characters to UART
+int board_uart_write(void const *buf, int len)
+{
+  int r = write(1, buf, len);
+
+  return r;
+}
+
+// Get current milliseconds
+uint32_t board_millis(void)
+{
+  struct timespec tp;
+
+    /* Wait until RTC is available */
+    while (g_rtc_enabled == false);
+
+    if (clock_gettime(CLOCK_MONOTONIC, &tp)) 
+    {
+        return 0;
+    }
+
+    return (((uint64_t)tp.tv_sec) * 1000 + tp.tv_nsec / 1000000);
+}
diff --git a/hw/bsp/stm32f070rbnucleo/stm32f070rbnucleo.c b/hw/bsp/stm32f070rbnucleo/stm32f070rbnucleo.c
index 6ee73bcc2..e51eda927 100644
--- a/hw/bsp/stm32f070rbnucleo/stm32f070rbnucleo.c
+++ b/hw/bsp/stm32f070rbnucleo/stm32f070rbnucleo.c
@@ -109,6 +109,18 @@ uint32_t board_button_read(void)
   return BUTTON_STATE_ACTIVE == HAL_GPIO_ReadPin(BUTTON_PORT, BUTTON_PIN);
 }
 
+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;
+}
+
 #if CFG_TUSB_OS  == OPT_OS_NONE
 volatile uint32_t system_ticks = 0;
 void SysTick_Handler (void)
diff --git a/hw/bsp/stm32f072disco/stm32f072disco.c b/hw/bsp/stm32f072disco/stm32f072disco.c
index 2faa00db9..46cb09490 100644
--- a/hw/bsp/stm32f072disco/stm32f072disco.c
+++ b/hw/bsp/stm32f072disco/stm32f072disco.c
@@ -131,6 +131,18 @@ uint32_t board_button_read(void)
   return BUTTON_STATE_ACTIVE == HAL_GPIO_ReadPin(BUTTON_PORT, BUTTON_PIN);
 }
 
+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;
+}
+
 #if CFG_TUSB_OS  == OPT_OS_NONE
 volatile uint32_t system_ticks = 0;
 void SysTick_Handler (void)
diff --git a/hw/bsp/stm32f103bluepill/STM32F103XB_FLASH.ld b/hw/bsp/stm32f103bluepill/STM32F103XB_FLASH.ld
new file mode 100644
index 000000000..4be9df61b
--- /dev/null
+++ b/hw/bsp/stm32f103bluepill/STM32F103XB_FLASH.ld
@@ -0,0 +1,167 @@
+/*
+*****************************************************************************
+**
+**  File        : STM32F103XB_FLASH.ld
+**
+**  Abstract    : Linker script for STM32F103xB Device with
+**                128KByte FLASH, 20KByte RAM
+**
+**                Set heap size, stack size and stack location according
+**                to application requirements.
+**
+**                Set memory bank area and size if external memory is used.
+**
+**  Target      : STMicroelectronics STM32
+**
+**
+**  Distribution: The file is distributed as is, without any warranty
+**                of any kind.
+**
+**  (c)Copyright Ac6.
+**  You may use this file as-is or modify it according to the needs of your
+**  project. Distribution of this file (unmodified or modified) is not
+**  permitted. Ac6 permit registered System Workbench for MCU users the
+**  rights to distribute the assembled, compiled & linked contents of this
+**  file as part of an application binary file, provided that it is built
+**  using the System Workbench for MCU toolchain.
+**
+*****************************************************************************
+*/
+
+/* Entry Point */
+ENTRY(Reset_Handler)
+
+/* Highest address of the user mode stack */
+_estack = 0x20004FFF;    /* end of RAM */
+
+/* Generate a link error if heap and stack don't fit into RAM */
+_Min_Heap_Size = 0x200;      /* required amount of heap  */
+_Min_Stack_Size = 0x400; /* required amount of stack */
+
+/* Specify the memory areas */
+MEMORY
+{
+FLASH (rx)      : ORIGIN = 0x08000000, LENGTH = 128K
+RAM (xrw)       : ORIGIN = 0x20000000, LENGTH = 20K
+}
+
+/* Define output sections */
+SECTIONS
+{
+  /* The startup code goes first into FLASH */
+  .isr_vector :
+  {
+    . = ALIGN(4);
+    KEEP(*(.isr_vector)) /* Startup code */
+    . = ALIGN(4);
+  } >FLASH
+
+  /* The program code and other data goes into FLASH */
+  .text :
+  {
+    . = ALIGN(4);
+    *(.text)           /* .text sections (code) */
+    *(.text*)          /* .text* sections (code) */
+    *(.glue_7)         /* glue arm to thumb code */
+    *(.glue_7t)        /* glue thumb to arm code */
+    *(.eh_frame)
+
+    KEEP (*(.init))
+    KEEP (*(.fini))
+
+    . = ALIGN(4);
+    _etext = .;        /* define a global symbols at end of code */
+  } >FLASH
+
+  /* Constant data goes into FLASH */
+  .rodata :
+  {
+    . = ALIGN(4);
+    *(.rodata)         /* .rodata sections (constants, strings, etc.) */
+    *(.rodata*)        /* .rodata* sections (constants, strings, etc.) */
+    . = ALIGN(4);
+  } >FLASH
+
+  .ARM.extab   : { *(.ARM.extab* .gnu.linkonce.armextab.*) } >FLASH
+  .ARM : {
+    __exidx_start = .;
+    *(.ARM.exidx*)
+    __exidx_end = .;
+  } >FLASH
+
+  .preinit_array     :
+  {
+    PROVIDE_HIDDEN (__preinit_array_start = .);
+    KEEP (*(.preinit_array*))
+    PROVIDE_HIDDEN (__preinit_array_end = .);
+  } >FLASH
+  .init_array :
+  {
+    PROVIDE_HIDDEN (__init_array_start = .);
+    KEEP (*(SORT(.init_array.*)))
+    KEEP (*(.init_array*))
+    PROVIDE_HIDDEN (__init_array_end = .);
+  } >FLASH
+  .fini_array :
+  {
+    PROVIDE_HIDDEN (__fini_array_start = .);
+    KEEP (*(SORT(.fini_array.*)))
+    KEEP (*(.fini_array*))
+    PROVIDE_HIDDEN (__fini_array_end = .);
+  } >FLASH
+
+  /* used by the startup to initialize data */
+  _sidata = LOADADDR(.data);
+
+  /* Initialized data sections goes into RAM, load LMA copy after code */
+  .data : 
+  {
+    . = ALIGN(4);
+    _sdata = .;        /* create a global symbol at data start */
+    *(.data)           /* .data sections */
+    *(.data*)          /* .data* sections */
+
+    . = ALIGN(4);
+    _edata = .;        /* define a global symbol at data end */
+  } >RAM AT> FLASH
+
+  
+  /* Uninitialized data section */
+  . = ALIGN(4);
+  .bss :
+  {
+    /* This is used by the startup in order to initialize the .bss secion */
+    _sbss = .;         /* define a global symbol at bss start */
+    __bss_start__ = _sbss;
+    *(.bss)
+    *(.bss*)
+    *(COMMON)
+
+    . = ALIGN(4);
+    _ebss = .;         /* define a global symbol at bss end */
+    __bss_end__ = _ebss;
+  } >RAM
+
+  /* User_heap_stack section, used to check that there is enough RAM left */
+  ._user_heap_stack :
+  {
+    . = ALIGN(8);
+    PROVIDE ( end = . );
+    PROVIDE ( _end = . );
+    . = . + _Min_Heap_Size;
+    . = . + _Min_Stack_Size;
+    . = ALIGN(8);
+  } >RAM
+
+  
+
+  /* Remove information from the standard libraries */
+  /DISCARD/ :
+  {
+    libc.a ( * )
+    libm.a ( * )
+    libgcc.a ( * )
+  }
+
+  .ARM.attributes 0 : { *(.ARM.attributes) }
+}
diff --git a/hw/bsp/stm32f103bluepill/board.mk b/hw/bsp/stm32f103bluepill/board.mk
index 4758edf17..26ad07b74 100644
--- a/hw/bsp/stm32f103bluepill/board.mk
+++ b/hw/bsp/stm32f103bluepill/board.mk
@@ -15,7 +15,7 @@ ST_HAL_DRIVER = hw/mcu/st/st_driver/STM32F1xx_HAL_Driver
 ST_CMSIS = hw/mcu/st/st_driver/CMSIS/Device/ST/STM32F1xx
 
 # All source paths should be relative to the top level.
-LD_FILE = $(ST_CMSIS)/Source/Templates/gcc/linker/STM32F103XB_FLASH.ld
+LD_FILE = hw/bsp/$(BOARD)/STM32F103XB_FLASH.ld
 
 SRC_C += \
 	$(ST_CMSIS)/Source/Templates/system_stm32f1xx.c \
diff --git a/hw/bsp/stm32f103bluepill/stm32f103bluepill.c b/hw/bsp/stm32f103bluepill/stm32f103bluepill.c
index aade44d35..24c898c84 100644
--- a/hw/bsp/stm32f103bluepill/stm32f103bluepill.c
+++ b/hw/bsp/stm32f103bluepill/stm32f103bluepill.c
@@ -139,6 +139,18 @@ uint32_t board_button_read(void)
   return BUTTON_STATE_ACTIVE == HAL_GPIO_ReadPin(BUTTON_PORT, BUTTON_PIN);
 }
 
+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;
+}
+
 #if CFG_TUSB_OS  == OPT_OS_NONE
 volatile uint32_t system_ticks = 0;
 void SysTick_Handler (void)
diff --git a/hw/bsp/stm32f207nucleo/stm32f207nucleo.c b/hw/bsp/stm32f207nucleo/stm32f207nucleo.c
index c313ed9f5..de0b4753b 100644
--- a/hw/bsp/stm32f207nucleo/stm32f207nucleo.c
+++ b/hw/bsp/stm32f207nucleo/stm32f207nucleo.c
@@ -152,6 +152,18 @@ uint32_t board_button_read(void)
   return BUTTON_STATE_ACTIVE == HAL_GPIO_ReadPin(BUTTON_PORT, BUTTON_PIN);
 }
 
+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;
+}
+
 #if CFG_TUSB_OS  == OPT_OS_NONE
 volatile uint32_t system_ticks = 0;
 void SysTick_Handler (void)
diff --git a/hw/bsp/stm32f303disco/stm32f303disco.c b/hw/bsp/stm32f303disco/stm32f303disco.c
index ae369ed5b..d6d97a531 100644
--- a/hw/bsp/stm32f303disco/stm32f303disco.c
+++ b/hw/bsp/stm32f303disco/stm32f303disco.c
@@ -143,6 +143,18 @@ uint32_t board_button_read(void)
   return BUTTON_STATE_ACTIVE == HAL_GPIO_ReadPin(BUTTON_PORT, BUTTON_PIN);
 }
 
+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;
+}
+
 #if CFG_TUSB_OS  == OPT_OS_NONE
 volatile uint32_t system_ticks = 0;
 void SysTick_Handler (void)
diff --git a/hw/bsp/stm32f407disco/stm32f407disco.c b/hw/bsp/stm32f407disco/stm32f407disco.c
index 16cec3e9a..b80c5c1b3 100644
--- a/hw/bsp/stm32f407disco/stm32f407disco.c
+++ b/hw/bsp/stm32f407disco/stm32f407disco.c
@@ -169,6 +169,18 @@ uint32_t board_button_read(void)
   return BUTTON_STATE_ACTIVE == HAL_GPIO_ReadPin(BUTTON_PORT, BUTTON_PIN);
 }
 
+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;
+}
+
 #if CFG_TUSB_OS  == OPT_OS_NONE
 volatile uint32_t system_ticks = 0;
 void SysTick_Handler (void)
diff --git a/hw/bsp/stm32f411disco/stm32f411disco.c b/hw/bsp/stm32f411disco/stm32f411disco.c
index ce8753432..d8d79d2f0 100644
--- a/hw/bsp/stm32f411disco/stm32f411disco.c
+++ b/hw/bsp/stm32f411disco/stm32f411disco.c
@@ -168,6 +168,18 @@ uint32_t board_button_read(void)
   return BUTTON_STATE_ACTIVE == HAL_GPIO_ReadPin(BUTTON_PORT, BUTTON_PIN);
 }
 
+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;
+}
+
 #if CFG_TUSB_OS  == OPT_OS_NONE
 volatile uint32_t system_ticks = 0;
 void SysTick_Handler (void)
diff --git a/hw/bsp/stm32f412disco/stm32f412disco.c b/hw/bsp/stm32f412disco/stm32f412disco.c
index 0a3ae7365..8d93013c1 100644
--- a/hw/bsp/stm32f412disco/stm32f412disco.c
+++ b/hw/bsp/stm32f412disco/stm32f412disco.c
@@ -195,6 +195,18 @@ uint32_t board_button_read(void)
   return BUTTON_STATE_ACTIVE == HAL_GPIO_ReadPin(BUTTON_PORT, BUTTON_PIN);
 }
 
+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;
+}
+
 #if CFG_TUSB_OS  == OPT_OS_NONE
 volatile uint32_t system_ticks = 0;
 void SysTick_Handler (void)
diff --git a/hw/bsp/stm32f767nucleo/board.mk b/hw/bsp/stm32f767nucleo/board.mk
index 65690cb2f..46023334c 100644
--- a/hw/bsp/stm32f767nucleo/board.mk
+++ b/hw/bsp/stm32f767nucleo/board.mk
@@ -25,6 +25,7 @@ SRC_C += \
 	$(ST_HAL_DRIVER)/Src/stm32f7xx_hal_rcc.c \
 	$(ST_HAL_DRIVER)/Src/stm32f7xx_hal_rcc_ex.c \
 	$(ST_HAL_DRIVER)/Src/stm32f7xx_hal_gpio.c \
+	$(ST_HAL_DRIVER)/Src/stm32f7xx_hal_uart.c \
 	$(ST_HAL_DRIVER)/Src/stm32f7xx_hal_pwr_ex.c
 
 SRC_S += \
diff --git a/hw/bsp/stm32f767nucleo/stm32f767nucleo.c b/hw/bsp/stm32f767nucleo/stm32f767nucleo.c
index 07412fd8e..13966438f 100644
--- a/hw/bsp/stm32f767nucleo/stm32f767nucleo.c
+++ b/hw/bsp/stm32f767nucleo/stm32f767nucleo.c
@@ -38,6 +38,24 @@
 #define BUTTON_PIN            GPIO_PIN_13
 #define BUTTON_STATE_ACTIVE   1
 
+#define UARTx                 USART3
+#define UART_GPIO_PORT        GPIOD
+#define UART_GPIO_AF          GPIO_AF7_USART3
+#define UART_TX_PIN           GPIO_PIN_8
+#define UART_RX_PIN           GPIO_PIN_9
+
+UART_HandleTypeDef UartHandle;
+
+// enable all LED, Button, Uart, USB clock
+static void all_rcc_clk_enable(void)
+{
+  __HAL_RCC_GPIOA_CLK_ENABLE();  // USB D+, D-
+  __HAL_RCC_GPIOB_CLK_ENABLE();  // LED
+  __HAL_RCC_GPIOC_CLK_ENABLE();  // Button
+  __HAL_RCC_GPIOD_CLK_ENABLE();  // Uart tx, rx
+  __HAL_RCC_USART3_CLK_ENABLE(); // Uart module
+}
+
 /**
   * @brief  System Clock Configuration
   *         The system Clock is configured as follow :
@@ -109,13 +127,13 @@ void board_init(void)
   #endif
 
   SystemClock_Config();
-
   SystemCoreClockUpdate();
 
+  all_rcc_clk_enable();
+
   GPIO_InitTypeDef  GPIO_InitStruct;
 
   // LED
-  __HAL_RCC_GPIOB_CLK_ENABLE();
   GPIO_InitStruct.Pin = LED_PIN;
   GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
   GPIO_InitStruct.Pull = GPIO_PULLUP;
@@ -123,16 +141,32 @@ void board_init(void)
   HAL_GPIO_Init(LED_PORT, &GPIO_InitStruct);
 
   // Button
-  __HAL_RCC_GPIOC_CLK_ENABLE();
   GPIO_InitStruct.Pin = BUTTON_PIN;
   GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
   GPIO_InitStruct.Pull = GPIO_NOPULL;
   GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
   HAL_GPIO_Init(BUTTON_PORT, &GPIO_InitStruct);
 
+  // Uart
+  GPIO_InitStruct.Pin       = UART_TX_PIN | UART_RX_PIN;
+  GPIO_InitStruct.Mode      = GPIO_MODE_AF_PP;
+  GPIO_InitStruct.Pull      = GPIO_PULLUP;
+  GPIO_InitStruct.Speed     = GPIO_SPEED_FREQ_VERY_HIGH;
+  GPIO_InitStruct.Alternate = UART_GPIO_AF;
+  HAL_GPIO_Init(UART_GPIO_PORT, &GPIO_InitStruct);
+
+  UartHandle.Instance        = UARTx;
+  UartHandle.Init.BaudRate   = CFG_BOARD_UART_BAUDRATE;
+  UartHandle.Init.WordLength = UART_WORDLENGTH_8B;
+  UartHandle.Init.StopBits   = UART_STOPBITS_1;
+  UartHandle.Init.Parity     = UART_PARITY_NONE;
+  UartHandle.Init.HwFlowCtl  = UART_HWCONTROL_NONE;
+  UartHandle.Init.Mode       = UART_MODE_TX_RX;
+  UartHandle.Init.OverSampling = UART_OVERSAMPLING_16;
+  HAL_UART_Init(&UartHandle);
+
   /* Configure USB FS GPIOs */
   /* Configure DM DP Pins */
-  __HAL_RCC_GPIOA_CLK_ENABLE();
   GPIO_InitStruct.Pin = (GPIO_PIN_11 | GPIO_PIN_12);
   GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
   GPIO_InitStruct.Pull = GPIO_NOPULL;
@@ -155,7 +189,6 @@ void board_init(void)
 
   /* Enable USB FS Clocks */
   __HAL_RCC_USB_OTG_FS_CLK_ENABLE();
-
 }
 
 //--------------------------------------------------------------------+
@@ -180,8 +213,8 @@ int board_uart_read(uint8_t* buf, int len)
 
 int board_uart_write(void const * buf, int len)
 {
-  (void) buf; (void) len;
-  return 0;
+  HAL_UART_Transmit(&UartHandle, (uint8_t*) buf, len, 0xffff);
+  return len;
 }
 
 #if CFG_TUSB_OS  == OPT_OS_NONE
diff --git a/hw/bsp/stm32f767nucleo/stm32f7xx_hal_conf.h b/hw/bsp/stm32f767nucleo/stm32f7xx_hal_conf.h
index 44093d69c..234191b00 100644
--- a/hw/bsp/stm32f767nucleo/stm32f7xx_hal_conf.h
+++ b/hw/bsp/stm32f767nucleo/stm32f7xx_hal_conf.h
@@ -41,7 +41,7 @@
 /* #define HAL_CRYP_MODULE_ENABLED   */
 /* #define HAL_DAC_MODULE_ENABLED   */
 /* #define HAL_DCMI_MODULE_ENABLED  */
-/* #define HAL_DMA_MODULE_ENABLED */
+#define HAL_DMA_MODULE_ENABLED
 /* #define HAL_DMA2D_MODULE_ENABLED  */
 /* #define HAL_ETH_MODULE_ENABLED  */
 #define HAL_FLASH_MODULE_ENABLED 
@@ -66,7 +66,7 @@
 /* #define HAL_SPDIFRX_MODULE_ENABLED */
 /* #define HAL_SPI_MODULE_ENABLED    */
 /* #define HAL_TIM_MODULE_ENABLED    */
-/* #define HAL_UART_MODULE_ENABLED  */
+#define HAL_UART_MODULE_ENABLED
 /* #define HAL_USART_MODULE_ENABLED  */
 /* #define HAL_IRDA_MODULE_ENABLED  */
 /* #define HAL_SMARTCARD_MODULE_ENABLED  */
diff --git a/hw/bsp/stm32l0538disco/stm32l0538disco.c b/hw/bsp/stm32l0538disco/stm32l0538disco.c
index a3daaf0d2..6b0222ea0 100644
--- a/hw/bsp/stm32l0538disco/stm32l0538disco.c
+++ b/hw/bsp/stm32l0538disco/stm32l0538disco.c
@@ -161,6 +161,18 @@ uint32_t board_button_read(void)
   return BUTTON_STATE_ACTIVE == HAL_GPIO_ReadPin(BUTTON_PORT, BUTTON_PIN);
 }
 
+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;
+}
+
 #if CFG_TUSB_OS  == OPT_OS_NONE
 volatile uint32_t system_ticks = 0;
 void SysTick_Handler (void)
diff --git a/hw/bsp/stm32l476disco/stm32l476disco.c b/hw/bsp/stm32l476disco/stm32l476disco.c
index ab8f13226..a4cad68bb 100644
--- a/hw/bsp/stm32l476disco/stm32l476disco.c
+++ b/hw/bsp/stm32l476disco/stm32l476disco.c
@@ -28,6 +28,7 @@
 
 #include "stm32l4xx.h"
 #include "stm32l4xx_hal_conf.h"
+#include "stm32l4xx_hal.h"
 
 #define LED_PORT              GPIOB
 #define LED_PIN               GPIO_PIN_2
@@ -117,8 +118,6 @@ void board_init(void)
 
   SystemClock_Config();
 
-  HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_MSI, RCC_MCODIV_1);//RCC_MCO1SOURCE_SYSCLK
-
   /* Enable Power Clock*/
   __HAL_RCC_PWR_CLK_ENABLE();
 
@@ -165,20 +164,12 @@ void board_init(void)
   GPIO_InitStruct.Pull = GPIO_NOPULL;
   HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
 
-  /* This for ID line */
-  GPIO_InitStruct.Pin = GPIO_PIN_12;
-  GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
-  GPIO_InitStruct.Pull = GPIO_PULLUP;
-  GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
-  GPIO_InitStruct.Alternate = GPIO_AF10_OTG_FS;
-  HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
-
   /* Enable USB FS Clock */
   __HAL_RCC_USB_OTG_FS_CLK_ENABLE();
 }
 
 //--------------------------------------------------------------------+
-// Board porting API
+// board porting API
 //--------------------------------------------------------------------+
 
 void board_led_write(bool state)
@@ -191,6 +182,18 @@ uint32_t board_button_read(void)
   return BUTTON_STATE_ACTIVE == HAL_GPIO_ReadPin(BUTTON_PORT, BUTTON_PIN);
 }
 
+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;
+}
+
 #if CFG_TUSB_OS  == OPT_OS_NONE
 volatile uint32_t system_ticks = 0;
 void SysTick_Handler (void)
diff --git a/hw/mcu/nordic/nrfx_config.h b/hw/mcu/nordic/nrfx_config.h
index 7c8b90781..8f9aeffe5 100644
--- a/hw/mcu/nordic/nrfx_config.h
+++ b/hw/mcu/nordic/nrfx_config.h
@@ -1,879 +1,10 @@
 #ifndef NRFX_CONFIG_H__
 #define NRFX_CONFIG_H__
 
-#define NRFX_PRS_ENABLED 0
-#define NRFX_CLOCK_ENABLED 0
+#define NRFX_POWER_ENABLED              1
+#define NRFX_POWER_CONFIG_IRQ_PRIORITY  7
 
-// <e> NRFX_POWER_ENABLED - nrfx_power - POWER peripheral driver
-//==========================================================
-#ifndef NRFX_POWER_ENABLED
-#define NRFX_POWER_ENABLED 1
-#endif
-// <o> NRFX_POWER_CONFIG_IRQ_PRIORITY  - Interrupt priority
-
-// <0=> 0 (highest)
-// <1=> 1
-// <2=> 2
-// <3=> 3
-// <4=> 4
-// <5=> 5
-// <6=> 6
-// <7=> 7
-
-#ifndef NRFX_POWER_CONFIG_IRQ_PRIORITY
-#define NRFX_POWER_CONFIG_IRQ_PRIORITY 7
-#endif
-
-// <q> NRFX_POWER_CONFIG_DEFAULT_DCDCEN  - The default configuration of main DCDC regulator
-
-
-// <i> This settings means only that components for DCDC regulator are installed and it can be enabled.
-
-#ifndef NRFX_POWER_CONFIG_DEFAULT_DCDCEN
-#define NRFX_POWER_CONFIG_DEFAULT_DCDCEN 0
-#endif
-
-// <q> NRFX_POWER_CONFIG_DEFAULT_DCDCENHV  - The default configuration of High Voltage DCDC regulator
-
-
-// <i> This settings means only that components for DCDC regulator are installed and it can be enabled.
-
-#ifndef NRFX_POWER_CONFIG_DEFAULT_DCDCENHV
-#define NRFX_POWER_CONFIG_DEFAULT_DCDCENHV 0
-#endif
-
-// </e>
-
-
-// <e> NRFX_QSPI_ENABLED - nrfx_qspi - QSPI peripheral driver
-//==========================================================
-#ifndef NRFX_QSPI_ENABLED
-#define NRFX_QSPI_ENABLED 1
-#endif
-// <o> NRFX_QSPI_CONFIG_SCK_DELAY - tSHSL, tWHSL and tSHWL in number of 16 MHz periods (62.5 ns).  <0-255>
-
-
-#ifndef NRFX_QSPI_CONFIG_SCK_DELAY
-#define NRFX_QSPI_CONFIG_SCK_DELAY 1
-#endif
-
-// <o> NRFX_QSPI_CONFIG_XIP_OFFSET - Address offset in the external memory for Execute in Place operation.
-#ifndef NRFX_QSPI_CONFIG_XIP_OFFSET
-#define NRFX_QSPI_CONFIG_XIP_OFFSET 0
-#endif
-
-// <o> NRFX_QSPI_CONFIG_READOC  - Number of data lines and opcode used for reading.
-
-// <0=> FastRead
-// <1=> Read2O
-// <2=> Read2IO
-// <3=> Read4O
-// <4=> Read4IO
-
-#ifndef NRFX_QSPI_CONFIG_READOC
-#define NRFX_QSPI_CONFIG_READOC 0
-#endif
-
-// <o> NRFX_QSPI_CONFIG_WRITEOC  - Number of data lines and opcode used for writing.
-
-// <0=> PP
-// <1=> PP2O
-// <2=> PP4O
-// <3=> PP4IO
-
-#ifndef NRFX_QSPI_CONFIG_WRITEOC
-#define NRFX_QSPI_CONFIG_WRITEOC 0
-#endif
-
-// <o> NRFX_QSPI_CONFIG_ADDRMODE  - Addressing mode.
-
-// <0=> 24bit
-// <1=> 32bit
-
-#ifndef NRFX_QSPI_CONFIG_ADDRMODE
-#define NRFX_QSPI_CONFIG_ADDRMODE 0
-#endif
-
-// <o> NRFX_QSPI_CONFIG_MODE  - SPI mode.
-
-// <0=> Mode 0
-// <1=> Mode 1
-
-#ifndef NRFX_QSPI_CONFIG_MODE
-#define NRFX_QSPI_CONFIG_MODE 0
-#endif
-
-// <o> NRFX_QSPI_CONFIG_FREQUENCY  - Frequency divider.
-
-// <0=> 32MHz/1
-// <1=> 32MHz/2
-// <2=> 32MHz/3
-// <3=> 32MHz/4
-// <4=> 32MHz/5
-// <5=> 32MHz/6
-// <6=> 32MHz/7
-// <7=> 32MHz/8
-// <8=> 32MHz/9
-// <9=> 32MHz/10
-// <10=> 32MHz/11
-// <11=> 32MHz/12
-// <12=> 32MHz/13
-// <13=> 32MHz/14
-// <14=> 32MHz/15
-// <15=> 32MHz/16
-
-#ifndef NRFX_QSPI_CONFIG_FREQUENCY
-#define NRFX_QSPI_CONFIG_FREQUENCY 15
-#endif
-
-// <s> NRFX_QSPI_PIN_SCK - SCK pin value.
-#ifndef NRFX_QSPI_PIN_SCK
-#define NRFX_QSPI_PIN_SCK NRF_QSPI_PIN_NOT_CONNECTED
-#endif
-
-// <s> NRFX_QSPI_PIN_CSN - CSN pin value.
-#ifndef NRFX_QSPI_PIN_CSN
-#define NRFX_QSPI_PIN_CSN NRF_QSPI_PIN_NOT_CONNECTED
-#endif
-
-// <s> NRFX_QSPI_PIN_IO0 - IO0 pin value.
-#ifndef NRFX_QSPI_PIN_IO0
-#define NRFX_QSPI_PIN_IO0 NRF_QSPI_PIN_NOT_CONNECTED
-#endif
-
-// <s> NRFX_QSPI_PIN_IO1 - IO1 pin value.
-#ifndef NRFX_QSPI_PIN_IO1
-#define NRFX_QSPI_PIN_IO1 NRF_QSPI_PIN_NOT_CONNECTED
-#endif
-
-// <s> NRFX_QSPI_PIN_IO2 - IO2 pin value.
-#ifndef NRFX_QSPI_PIN_IO2
-#define NRFX_QSPI_PIN_IO2 NRF_QSPI_PIN_NOT_CONNECTED
-#endif
-
-// <s> NRFX_QSPI_PIN_IO3 - IO3 pin value.
-#ifndef NRFX_QSPI_PIN_IO3
-#define NRFX_QSPI_PIN_IO3 NRF_QSPI_PIN_NOT_CONNECTED
-#endif
-
-// <o> NRFX_QSPI_CONFIG_IRQ_PRIORITY  - Interrupt priority
-
-// <0=> 0 (highest)
-// <1=> 1
-// <2=> 2
-// <3=> 3
-// <4=> 4
-// <5=> 5
-// <6=> 6
-// <7=> 7
-
-#ifndef NRFX_QSPI_CONFIG_IRQ_PRIORITY
-#define NRFX_QSPI_CONFIG_IRQ_PRIORITY 7
-#endif
-
-// </e>
-
-// <e> NRFX_RNG_ENABLED - nrfx_rng - RNG peripheral driver
-//==========================================================
-#ifndef NRFX_RNG_ENABLED
-#define NRFX_RNG_ENABLED 1
-#endif
-// <q> NRFX_RNG_CONFIG_ERROR_CORRECTION  - Error correction
-
-
-#ifndef NRFX_RNG_CONFIG_ERROR_CORRECTION
-#define NRFX_RNG_CONFIG_ERROR_CORRECTION 1
-#endif
-
-// <o> NRFX_RNG_CONFIG_IRQ_PRIORITY  - Interrupt priority
-
-// <0=> 0 (highest)
-// <1=> 1
-// <2=> 2
-// <3=> 3
-// <4=> 4
-// <5=> 5
-// <6=> 6
-// <7=> 7
-
-#ifndef NRFX_RNG_CONFIG_IRQ_PRIORITY
-#define NRFX_RNG_CONFIG_IRQ_PRIORITY 7
-#endif
-
-// <e> NRFX_RNG_CONFIG_LOG_ENABLED - Enables logging in the module.
-//==========================================================
-#ifndef NRFX_RNG_CONFIG_LOG_ENABLED
-#define NRFX_RNG_CONFIG_LOG_ENABLED 0
-#endif
-// <o> NRFX_RNG_CONFIG_LOG_LEVEL  - Default Severity level
-
-// <0=> Off
-// <1=> Error
-// <2=> Warning
-// <3=> Info
-// <4=> Debug
-
-#ifndef NRFX_RNG_CONFIG_LOG_LEVEL
-#define NRFX_RNG_CONFIG_LOG_LEVEL 3
-#endif
-
-// <o> NRFX_RNG_CONFIG_INFO_COLOR  - ANSI escape code prefix.
-
-// <0=> Default
-// <1=> Black
-// <2=> Red
-// <3=> Green
-// <4=> Yellow
-// <5=> Blue
-// <6=> Magenta
-// <7=> Cyan
-// <8=> White
-
-#ifndef NRFX_RNG_CONFIG_INFO_COLOR
-#define NRFX_RNG_CONFIG_INFO_COLOR 0
-#endif
-
-// <o> NRFX_RNG_CONFIG_DEBUG_COLOR  - ANSI escape code prefix.
-
-// <0=> Default
-// <1=> Black
-// <2=> Red
-// <3=> Green
-// <4=> Yellow
-// <5=> Blue
-// <6=> Magenta
-// <7=> Cyan
-// <8=> White
-
-#ifndef NRFX_RNG_CONFIG_DEBUG_COLOR
-#define NRFX_RNG_CONFIG_DEBUG_COLOR 0
-#endif
-
-// </e>
-
-// </e>
-
-// <e> NRFX_RTC_ENABLED - nrfx_rtc - RTC peripheral driver
-//==========================================================
-#ifndef NRFX_RTC_ENABLED
-#define NRFX_RTC_ENABLED 1
-#endif
-// <q> NRFX_RTC0_ENABLED  - Enable RTC0 instance
-
-
-#ifndef NRFX_RTC0_ENABLED
-#define NRFX_RTC0_ENABLED 1
-#endif
-
-// <q> NRFX_RTC1_ENABLED  - Enable RTC1 instance
-
-
-#ifndef NRFX_RTC1_ENABLED
-#define NRFX_RTC1_ENABLED 1
-#endif
-
-// <q> NRFX_RTC2_ENABLED  - Enable RTC2 instance
-
-
-#ifndef NRFX_RTC2_ENABLED
-#define NRFX_RTC2_ENABLED 1
-#endif
-
-// <o> NRFX_RTC_MAXIMUM_LATENCY_US - Maximum possible time[us] in highest priority interrupt
-#ifndef NRFX_RTC_MAXIMUM_LATENCY_US
-#define NRFX_RTC_MAXIMUM_LATENCY_US 2000
-#endif
-
-// <o> NRFX_RTC_DEFAULT_CONFIG_FREQUENCY - Frequency  <16-32768>
-
-
-#ifndef NRFX_RTC_DEFAULT_CONFIG_FREQUENCY
-#define NRFX_RTC_DEFAULT_CONFIG_FREQUENCY 32768
-#endif
-
-// <q> NRFX_RTC_DEFAULT_CONFIG_RELIABLE  - Ensures safe compare event triggering
-
-
-#ifndef NRFX_RTC_DEFAULT_CONFIG_RELIABLE
-#define NRFX_RTC_DEFAULT_CONFIG_RELIABLE 0
-#endif
-
-// <o> NRFX_RTC_DEFAULT_CONFIG_IRQ_PRIORITY  - Interrupt priority
-
-// <0=> 0 (highest)
-// <1=> 1
-// <2=> 2
-// <3=> 3
-// <4=> 4
-// <5=> 5
-// <6=> 6
-// <7=> 7
-
-#ifndef NRFX_RTC_DEFAULT_CONFIG_IRQ_PRIORITY
-#define NRFX_RTC_DEFAULT_CONFIG_IRQ_PRIORITY 7
-#endif
-
-// <e> NRFX_RTC_CONFIG_LOG_ENABLED - Enables logging in the module.
-//==========================================================
-#ifndef NRFX_RTC_CONFIG_LOG_ENABLED
-#define NRFX_RTC_CONFIG_LOG_ENABLED 0
-#endif
-// <o> NRFX_RTC_CONFIG_LOG_LEVEL  - Default Severity level
-
-// <0=> Off
-// <1=> Error
-// <2=> Warning
-// <3=> Info
-// <4=> Debug
-
-#ifndef NRFX_RTC_CONFIG_LOG_LEVEL
-#define NRFX_RTC_CONFIG_LOG_LEVEL 3
-#endif
-
-// <o> NRFX_RTC_CONFIG_INFO_COLOR  - ANSI escape code prefix.
-
-// <0=> Default
-// <1=> Black
-// <2=> Red
-// <3=> Green
-// <4=> Yellow
-// <5=> Blue
-// <6=> Magenta
-// <7=> Cyan
-// <8=> White
-
-#ifndef NRFX_RTC_CONFIG_INFO_COLOR
-#define NRFX_RTC_CONFIG_INFO_COLOR 0
-#endif
-
-// <o> NRFX_RTC_CONFIG_DEBUG_COLOR  - ANSI escape code prefix.
-
-// <0=> Default
-// <1=> Black
-// <2=> Red
-// <3=> Green
-// <4=> Yellow
-// <5=> Blue
-// <6=> Magenta
-// <7=> Cyan
-// <8=> White
-
-#ifndef NRFX_RTC_CONFIG_DEBUG_COLOR
-#define NRFX_RTC_CONFIG_DEBUG_COLOR 0
-#endif
-
-// </e>
-
-// </e>
-
-
-// <e> NRFX_SWI_ENABLED - nrfx_swi - SWI/EGU peripheral allocator
-//==========================================================
-#ifndef NRFX_SWI_ENABLED
-#define NRFX_SWI_ENABLED 1
-#endif
-// <q> NRFX_EGU_ENABLED  - Enable EGU support
-
-
-#ifndef NRFX_EGU_ENABLED
-#define NRFX_EGU_ENABLED 0
-#endif
-
-// <q> NRFX_SWI0_DISABLED  - Exclude SWI0 from being utilized by the driver
-
-
-#ifndef NRFX_SWI0_DISABLED
-#define NRFX_SWI0_DISABLED 0
-#endif
-
-// <q> NRFX_SWI1_DISABLED  - Exclude SWI1 from being utilized by the driver
-
-
-#ifndef NRFX_SWI1_DISABLED
-#define NRFX_SWI1_DISABLED 0
-#endif
-
-// <q> NRFX_SWI2_DISABLED  - Exclude SWI2 from being utilized by the driver
-
-
-#ifndef NRFX_SWI2_DISABLED
-#define NRFX_SWI2_DISABLED 0
-#endif
-
-// <q> NRFX_SWI3_DISABLED  - Exclude SWI3 from being utilized by the driver
-
-
-#ifndef NRFX_SWI3_DISABLED
-#define NRFX_SWI3_DISABLED 0
-#endif
-
-// <q> NRFX_SWI4_DISABLED  - Exclude SWI4 from being utilized by the driver
-
-
-#ifndef NRFX_SWI4_DISABLED
-#define NRFX_SWI4_DISABLED 0
-#endif
-
-// <q> NRFX_SWI5_DISABLED  - Exclude SWI5 from being utilized by the driver
-
-
-#ifndef NRFX_SWI5_DISABLED
-#define NRFX_SWI5_DISABLED 0
-#endif
-
-// <e> NRFX_SWI_CONFIG_LOG_ENABLED - Enables logging in the module.
-//==========================================================
-#ifndef NRFX_SWI_CONFIG_LOG_ENABLED
-#define NRFX_SWI_CONFIG_LOG_ENABLED 0
-#endif
-// <o> NRFX_SWI_CONFIG_LOG_LEVEL  - Default Severity level
-
-// <0=> Off
-// <1=> Error
-// <2=> Warning
-// <3=> Info
-// <4=> Debug
-
-#ifndef NRFX_SWI_CONFIG_LOG_LEVEL
-#define NRFX_SWI_CONFIG_LOG_LEVEL 3
-#endif
-
-// <o> NRFX_SWI_CONFIG_INFO_COLOR  - ANSI escape code prefix.
-
-// <0=> Default
-// <1=> Black
-// <2=> Red
-// <3=> Green
-// <4=> Yellow
-// <5=> Blue
-// <6=> Magenta
-// <7=> Cyan
-// <8=> White
-
-#ifndef NRFX_SWI_CONFIG_INFO_COLOR
-#define NRFX_SWI_CONFIG_INFO_COLOR 0
-#endif
-
-// <o> NRFX_SWI_CONFIG_DEBUG_COLOR  - ANSI escape code prefix.
-
-// <0=> Default
-// <1=> Black
-// <2=> Red
-// <3=> Green
-// <4=> Yellow
-// <5=> Blue
-// <6=> Magenta
-// <7=> Cyan
-// <8=> White
-
-#ifndef NRFX_SWI_CONFIG_DEBUG_COLOR
-#define NRFX_SWI_CONFIG_DEBUG_COLOR 0
-#endif
-
-// </e>
-
-// </e>
-
-// <q> NRFX_SYSTICK_ENABLED  - nrfx_systick - ARM(R) SysTick driver
-
-
-#ifndef NRFX_SYSTICK_ENABLED
-#define NRFX_SYSTICK_ENABLED 1
-#endif
-
-// <e> NRFX_TIMER_ENABLED - nrfx_timer - TIMER periperal driver
-//==========================================================
-#ifndef NRFX_TIMER_ENABLED
-#define NRFX_TIMER_ENABLED 1
-#endif
-// <q> NRFX_TIMER0_ENABLED  - Enable TIMER0 instance
-
-
-#ifndef NRFX_TIMER0_ENABLED
-#define NRFX_TIMER0_ENABLED 1
-#endif
-
-// <q> NRFX_TIMER1_ENABLED  - Enable TIMER1 instance
-
-
-#ifndef NRFX_TIMER1_ENABLED
-#define NRFX_TIMER1_ENABLED 1
-#endif
-
-// <q> NRFX_TIMER2_ENABLED  - Enable TIMER2 instance
-
-
-#ifndef NRFX_TIMER2_ENABLED
-#define NRFX_TIMER2_ENABLED 1
-#endif
-
-// <q> NRFX_TIMER3_ENABLED  - Enable TIMER3 instance
-
-
-#ifndef NRFX_TIMER3_ENABLED
-#define NRFX_TIMER3_ENABLED 1
-#endif
-
-// <q> NRFX_TIMER4_ENABLED  - Enable TIMER4 instance
-
-
-#ifndef NRFX_TIMER4_ENABLED
-#define NRFX_TIMER4_ENABLED 1
-#endif
-
-// <o> NRFX_TIMER_DEFAULT_CONFIG_FREQUENCY  - Timer frequency if in Timer mode
-
-// <0=> 16 MHz
-// <1=> 8 MHz
-// <2=> 4 MHz
-// <3=> 2 MHz
-// <4=> 1 MHz
-// <5=> 500 kHz
-// <6=> 250 kHz
-// <7=> 125 kHz
-// <8=> 62.5 kHz
-// <9=> 31.25 kHz
-
-#ifndef NRFX_TIMER_DEFAULT_CONFIG_FREQUENCY
-#define NRFX_TIMER_DEFAULT_CONFIG_FREQUENCY 0
-#endif
-
-// <o> NRFX_TIMER_DEFAULT_CONFIG_MODE  - Timer mode or operation
-
-// <0=> Timer
-// <1=> Counter
-
-#ifndef NRFX_TIMER_DEFAULT_CONFIG_MODE
-#define NRFX_TIMER_DEFAULT_CONFIG_MODE 0
-#endif
-
-// <o> NRFX_TIMER_DEFAULT_CONFIG_BIT_WIDTH  - Timer counter bit width
-
-// <0=> 16 bit
-// <1=> 8 bit
-// <2=> 24 bit
-// <3=> 32 bit
-
-#ifndef NRFX_TIMER_DEFAULT_CONFIG_BIT_WIDTH
-#define NRFX_TIMER_DEFAULT_CONFIG_BIT_WIDTH 0
-#endif
-
-// <o> NRFX_TIMER_DEFAULT_CONFIG_IRQ_PRIORITY  - Interrupt priority
-
-// <0=> 0 (highest)
-// <1=> 1
-// <2=> 2
-// <3=> 3
-// <4=> 4
-// <5=> 5
-// <6=> 6
-// <7=> 7
-
-#ifndef NRFX_TIMER_DEFAULT_CONFIG_IRQ_PRIORITY
-#define NRFX_TIMER_DEFAULT_CONFIG_IRQ_PRIORITY 7
-#endif
-
-// <e> NRFX_TIMER_CONFIG_LOG_ENABLED - Enables logging in the module.
-//==========================================================
-#ifndef NRFX_TIMER_CONFIG_LOG_ENABLED
-#define NRFX_TIMER_CONFIG_LOG_ENABLED 0
-#endif
-// <o> NRFX_TIMER_CONFIG_LOG_LEVEL  - Default Severity level
-
-// <0=> Off
-// <1=> Error
-// <2=> Warning
-// <3=> Info
-// <4=> Debug
-
-#ifndef NRFX_TIMER_CONFIG_LOG_LEVEL
-#define NRFX_TIMER_CONFIG_LOG_LEVEL 3
-#endif
-
-// <o> NRFX_TIMER_CONFIG_INFO_COLOR  - ANSI escape code prefix.
-
-// <0=> Default
-// <1=> Black
-// <2=> Red
-// <3=> Green
-// <4=> Yellow
-// <5=> Blue
-// <6=> Magenta
-// <7=> Cyan
-// <8=> White
-
-#ifndef NRFX_TIMER_CONFIG_INFO_COLOR
-#define NRFX_TIMER_CONFIG_INFO_COLOR 0
-#endif
-
-// <o> NRFX_TIMER_CONFIG_DEBUG_COLOR  - ANSI escape code prefix.
-
-// <0=> Default
-// <1=> Black
-// <2=> Red
-// <3=> Green
-// <4=> Yellow
-// <5=> Blue
-// <6=> Magenta
-// <7=> Cyan
-// <8=> White
-
-#ifndef NRFX_TIMER_CONFIG_DEBUG_COLOR
-#define NRFX_TIMER_CONFIG_DEBUG_COLOR 0
-#endif
-
-// </e>
-
-// <e> NRFX_UARTE_ENABLED - nrfx_uarte - UARTE peripheral driver
-//==========================================================
-#ifndef NRFX_UARTE_ENABLED
-#define NRFX_UARTE_ENABLED 1
-#endif
-// <o> NRFX_UARTE0_ENABLED - Enable UARTE0 instance
-#ifndef NRFX_UARTE0_ENABLED
-#define NRFX_UARTE0_ENABLED 1
-#endif
-
-// <o> NRFX_UARTE1_ENABLED - Enable UARTE1 instance
-#ifndef NRFX_UARTE1_ENABLED
-#define NRFX_UARTE1_ENABLED 1
-#endif
-
-// <o> NRFX_UARTE_DEFAULT_CONFIG_HWFC  - Hardware Flow Control
-
-// <0=> Disabled
-// <1=> Enabled
-
-#ifndef NRFX_UARTE_DEFAULT_CONFIG_HWFC
-#define NRFX_UARTE_DEFAULT_CONFIG_HWFC 0
-#endif
-
-// <o> NRFX_UARTE_DEFAULT_CONFIG_PARITY  - Parity
-
-// <0=> Excluded
-// <14=> Included
-
-#ifndef NRFX_UARTE_DEFAULT_CONFIG_PARITY
-#define NRFX_UARTE_DEFAULT_CONFIG_PARITY 0
-#endif
-
-// <o> NRFX_UARTE_DEFAULT_CONFIG_BAUDRATE  - Default Baudrate
-
-// <323584=> 1200 baud
-// <643072=> 2400 baud
-// <1290240=> 4800 baud
-// <2576384=> 9600 baud
-// <3862528=> 14400 baud
-// <5152768=> 19200 baud
-// <7716864=> 28800 baud
-// <8388608=> 31250 baud
-// <10289152=> 38400 baud
-// <15007744=> 56000 baud
-// <15400960=> 57600 baud
-// <20615168=> 76800 baud
-// <30801920=> 115200 baud
-// <61865984=> 230400 baud
-// <67108864=> 250000 baud
-// <121634816=> 460800 baud
-// <251658240=> 921600 baud
-// <268435456=> 1000000 baud
-
-#ifndef NRFX_UARTE_DEFAULT_CONFIG_BAUDRATE
-#define NRFX_UARTE_DEFAULT_CONFIG_BAUDRATE 30801920
-#endif
-
-// <o> NRFX_UARTE_DEFAULT_CONFIG_IRQ_PRIORITY  - Interrupt priority
-
-// <0=> 0 (highest)
-// <1=> 1
-// <2=> 2
-// <3=> 3
-// <4=> 4
-// <5=> 5
-// <6=> 6
-// <7=> 7
-
-#ifndef NRFX_UARTE_DEFAULT_CONFIG_IRQ_PRIORITY
-#define NRFX_UARTE_DEFAULT_CONFIG_IRQ_PRIORITY 7
-#endif
-
-// <e> NRFX_UARTE_CONFIG_LOG_ENABLED - Enables logging in the module.
-//==========================================================
-#ifndef NRFX_UARTE_CONFIG_LOG_ENABLED
-#define NRFX_UARTE_CONFIG_LOG_ENABLED 0
-#endif
-// <o> NRFX_UARTE_CONFIG_LOG_LEVEL  - Default Severity level
-
-// <0=> Off
-// <1=> Error
-// <2=> Warning
-// <3=> Info
-// <4=> Debug
-
-#ifndef NRFX_UARTE_CONFIG_LOG_LEVEL
-#define NRFX_UARTE_CONFIG_LOG_LEVEL 3
-#endif
-
-// <o> NRFX_UARTE_CONFIG_INFO_COLOR  - ANSI escape code prefix.
-
-// <0=> Default
-// <1=> Black
-// <2=> Red
-// <3=> Green
-// <4=> Yellow
-// <5=> Blue
-// <6=> Magenta
-// <7=> Cyan
-// <8=> White
-
-#ifndef NRFX_UARTE_CONFIG_INFO_COLOR
-#define NRFX_UARTE_CONFIG_INFO_COLOR 0
-#endif
-
-// <o> NRFX_UARTE_CONFIG_DEBUG_COLOR  - ANSI escape code prefix.
-
-// <0=> Default
-// <1=> Black
-// <2=> Red
-// <3=> Green
-// <4=> Yellow
-// <5=> Blue
-// <6=> Magenta
-// <7=> Cyan
-// <8=> White
-
-#ifndef NRFX_UARTE_CONFIG_DEBUG_COLOR
-#define NRFX_UARTE_CONFIG_DEBUG_COLOR 0
-#endif
-
-// </e>
-
-// </e>
-
-// <e> NRFX_UART_ENABLED - nrfx_uart - UART peripheral driver
-//==========================================================
-#ifndef NRFX_UART_ENABLED
-#define NRFX_UART_ENABLED 1
-#endif
-// <o> NRFX_UART0_ENABLED - Enable UART0 instance
-#ifndef NRFX_UART0_ENABLED
-#define NRFX_UART0_ENABLED 1
-#endif
-
-// <o> NRFX_UART_DEFAULT_CONFIG_HWFC  - Hardware Flow Control
-
-// <0=> Disabled
-// <1=> Enabled
-
-#ifndef NRFX_UART_DEFAULT_CONFIG_HWFC
-#define NRFX_UART_DEFAULT_CONFIG_HWFC 0
-#endif
-
-// <o> NRFX_UART_DEFAULT_CONFIG_PARITY  - Parity
-
-// <0=> Excluded
-// <14=> Included
-
-#ifndef NRFX_UART_DEFAULT_CONFIG_PARITY
-#define NRFX_UART_DEFAULT_CONFIG_PARITY 0
-#endif
-
-// <o> NRFX_UART_DEFAULT_CONFIG_BAUDRATE  - Default Baudrate
-
-// <323584=> 1200 baud
-// <643072=> 2400 baud
-// <1290240=> 4800 baud
-// <2576384=> 9600 baud
-// <3866624=> 14400 baud
-// <5152768=> 19200 baud
-// <7729152=> 28800 baud
-// <8388608=> 31250 baud
-// <10309632=> 38400 baud
-// <15007744=> 56000 baud
-// <15462400=> 57600 baud
-// <20615168=> 76800 baud
-// <30924800=> 115200 baud
-// <61845504=> 230400 baud
-// <67108864=> 250000 baud
-// <123695104=> 460800 baud
-// <247386112=> 921600 baud
-// <268435456=> 1000000 baud
-
-#ifndef NRFX_UART_DEFAULT_CONFIG_BAUDRATE
-#define NRFX_UART_DEFAULT_CONFIG_BAUDRATE 30924800
-#endif
-
-// <o> NRFX_UART_DEFAULT_CONFIG_IRQ_PRIORITY  - Interrupt priority
-
-// <0=> 0 (highest)
-// <1=> 1
-// <2=> 2
-// <3=> 3
-// <4=> 4
-// <5=> 5
-// <6=> 6
-// <7=> 7
-
-#ifndef NRFX_UART_DEFAULT_CONFIG_IRQ_PRIORITY
-#define NRFX_UART_DEFAULT_CONFIG_IRQ_PRIORITY 7
-#endif
-
-// <e> NRFX_UART_CONFIG_LOG_ENABLED - Enables logging in the module.
-//==========================================================
-#ifndef NRFX_UART_CONFIG_LOG_ENABLED
-#define NRFX_UART_CONFIG_LOG_ENABLED 0
-#endif
-// <o> NRFX_UART_CONFIG_LOG_LEVEL  - Default Severity level
-
-// <0=> Off
-// <1=> Error
-// <2=> Warning
-// <3=> Info
-// <4=> Debug
-
-#ifndef NRFX_UART_CONFIG_LOG_LEVEL
-#define NRFX_UART_CONFIG_LOG_LEVEL 3
-#endif
-
-// <o> NRFX_UART_CONFIG_INFO_COLOR  - ANSI escape code prefix.
-
-// <0=> Default
-// <1=> Black
-// <2=> Red
-// <3=> Green
-// <4=> Yellow
-// <5=> Blue
-// <6=> Magenta
-// <7=> Cyan
-// <8=> White
-
-#ifndef NRFX_UART_CONFIG_INFO_COLOR
-#define NRFX_UART_CONFIG_INFO_COLOR 0
-#endif
-
-// <o> NRFX_UART_CONFIG_DEBUG_COLOR  - ANSI escape code prefix.
-
-// <0=> Default
-// <1=> Black
-// <2=> Red
-// <3=> Green
-// <4=> Yellow
-// <5=> Blue
-// <6=> Magenta
-// <7=> Cyan
-// <8=> White
-
-#ifndef NRFX_UART_CONFIG_DEBUG_COLOR
-#define NRFX_UART_CONFIG_DEBUG_COLOR 0
-#endif
-
-// </e>
-
-
-// </e>
-
-// </e>
-
-// </h>
+#define NRFX_UARTE_ENABLED   1
+#define NRFX_UARTE0_ENABLED  1
 
 #endif // NRFX_CONFIG_H__
diff --git a/hw/mcu/nordic/nrfx_log.h b/hw/mcu/nordic/nrfx_log.h
new file mode 100644
index 000000000..3bc1b424e
--- /dev/null
+++ b/hw/mcu/nordic/nrfx_log.h
@@ -0,0 +1,135 @@
+/*
+ * Copyright (c) 2017 - 2019, Nordic Semiconductor ASA
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef NRFX_LOG_H__
+#define NRFX_LOG_H__
+
+// THIS IS A TEMPLATE FILE.
+// It should be copied to a suitable location within the host environment into
+// which nrfx is integrated, and the following macros should be provided with
+// appropriate implementations.
+// And this comment should be removed from the customized file.
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @defgroup nrfx_log nrfx_log.h
+ * @{
+ * @ingroup nrfx
+ *
+ * @brief This file contains macros that should be implemented according to
+ *        the needs of the host environment into which @em nrfx is integrated.
+ */
+
+/**
+ * @brief Macro for logging a message with the severity level ERROR.
+ *
+ * @param format printf-style format string, optionally followed by arguments
+ *               to be formatted and inserted in the resulting string.
+ */
+#define NRFX_LOG_ERROR(format, ...)
+
+/**
+ * @brief Macro for logging a message with the severity level WARNING.
+ *
+ * @param format printf-style format string, optionally followed by arguments
+ *               to be formatted and inserted in the resulting string.
+ */
+#define NRFX_LOG_WARNING(format, ...)
+
+/**
+ * @brief Macro for logging a message with the severity level INFO.
+ *
+ * @param format printf-style format string, optionally followed by arguments
+ *               to be formatted and inserted in the resulting string.
+ */
+#define NRFX_LOG_INFO(format, ...)
+
+/**
+ * @brief Macro for logging a message with the severity level DEBUG.
+ *
+ * @param format printf-style format string, optionally followed by arguments
+ *               to be formatted and inserted in the resulting string.
+ */
+#define NRFX_LOG_DEBUG(format, ...)
+
+
+/**
+ * @brief Macro for logging a memory dump with the severity level ERROR.
+ *
+ * @param[in] p_memory Pointer to the memory region to be dumped.
+ * @param[in] length   Length of the memory region in bytes.
+ */
+#define NRFX_LOG_HEXDUMP_ERROR(p_memory, length)
+
+/**
+ * @brief Macro for logging a memory dump with the severity level WARNING.
+ *
+ * @param[in] p_memory Pointer to the memory region to be dumped.
+ * @param[in] length   Length of the memory region in bytes.
+ */
+#define NRFX_LOG_HEXDUMP_WARNING(p_memory, length)
+
+/**
+ * @brief Macro for logging a memory dump with the severity level INFO.
+ *
+ * @param[in] p_memory Pointer to the memory region to be dumped.
+ * @param[in] length   Length of the memory region in bytes.
+ */
+#define NRFX_LOG_HEXDUMP_INFO(p_memory, length)
+
+/**
+ * @brief Macro for logging a memory dump with the severity level DEBUG.
+ *
+ * @param[in] p_memory Pointer to the memory region to be dumped.
+ * @param[in] length   Length of the memory region in bytes.
+ */
+#define NRFX_LOG_HEXDUMP_DEBUG(p_memory, length)
+
+
+/**
+ * @brief Macro for getting the textual representation of a given error code.
+ *
+ * @param[in] error_code Error code.
+ *
+ * @return String containing the textual representation of the error code.
+ */
+#define NRFX_LOG_ERROR_STRING_GET(error_code)
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // NRFX_LOG_H__
diff --git a/hw/mcu/nxp/lpc_driver b/hw/mcu/nxp/lpc_driver
-Subproject 7d2ca4123ec4fe04c6ea0aa2662d7a6aebc0c4f
+Subproject fa206508e9ea289ceeb9c35442dd8002002f931
diff --git a/hw/mcu/sony/cxd56/spresense-exported-sdk b/hw/mcu/sony/cxd56/spresense-exported-sdk
new file mode 160000
+Subproject b473b28a14a03f3d416b6e2c071bcfd4fb92cb6
diff --git a/hw/mcu/ti b/hw/mcu/ti
new file mode 160000
+Subproject ed52d354c99e25a5e9db2376eb5e7058c81c3eb