board: added board nucleo f401

boards/nucleo-f401/Makefile

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+# tell the Makefile.base which module to build
+MODULE = $(BOARD)_base
+
+include $(RIOTBASE)/Makefile.base

boards/nucleo-f401/Makefile.features

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+FEATURES_PROVIDED += cpp
+FEATURES_PROVIDED += periph_uart
+FEATURES_PROVIDED += periph_gpio
+FEATURES_PROVIDED += periph_spi
+FEATURES_PROVIDED += periph_i2c
+FEATURES_PROVIDED += periph_pwm
+FEATURES_PROVIDED += periph_adc
+
+FEATURES_MCU_GROUP = cortex_m4

boards/nucleo-f401/Makefile.include

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+# define the cpu used by the nucleo-f401 board
+export CPU = stm32f4
+export CPU_MODEL = stm32f401re
+
+#define the default port depending on the host OS
+OS := $(shell uname)
+ifeq ($(OS),Linux)
+  PORT ?= /dev/ttyUSB0
+else ifeq ($(OS),Darwin)
+  PORT ?= $(shell ls -1 /dev/tty.SLAB_USBtoUART* | head -n 1)
+else
+  $(info CAUTION: No flash tool for your host system found!)
+  # TODO: add support for windows as host platform
+endif
+export PORT
+
+# define tools used for building the project
+export PREFIX = arm-none-eabi-
+export CC = $(PREFIX)gcc
+export CXX = $(PREFIX)g++
+export AR = $(PREFIX)ar
+export AS = $(PREFIX)as
+export LINK = $(PREFIX)gcc
+export SIZE = $(PREFIX)size
+export OBJCOPY = $(PREFIX)objcopy
+export DBG = $(PREFIX)gdb
+export TERMPROG = $(RIOTBASE)/dist/tools/pyterm/pyterm
+export FLASHER = $(RIOTBASE)/dist/tools/openocd/openocd.sh
+export DEBUGGER = $(RIOTBASE)/dist/tools/openocd/openocd.sh
+export DEBUGSERVER = $(RIOTBASE)/dist/tools/openocd/openocd.sh
+export RESET = $(RIOTBASE)/dist/tools/openocd/openocd.sh
+
+# define build specific options
+CPU_USAGE = -mcpu=cortex-m4
+FPU_USAGE = -mfloat-abi=hard -mfpu=fpv4-sp-d16
+export CFLAGS += -ggdb -g3 -std=gnu99 -O0 -Wall -Wstrict-prototypes $(CPU_USAGE) $(FPU_USAGE) -mlittle-endian -mthumb -mno-thumb-interwork -nostartfiles
+export CFLAGS += -ffunction-sections -fdata-sections -fno-builtin
+export ASFLAGS += -ggdb -g3 $(CPU_USAGE) $(FPU_USAGE) -mlittle-endian
+export LINKFLAGS += -g3 -ggdb -std=gnu99 $(CPU_USAGE) $(FPU_USAGE) -mlittle-endian -static -lgcc -mthumb -mno-thumb-interwork -nostartfiles
+# $(LINKERSCRIPT) is specified in cpu/Makefile.include
+export LINKFLAGS += -T$(LINKERSCRIPT)
+export OFLAGS = -O ihex
+export TERMFLAGS += -p "$(PORT)"
+export FFLAGS = flash
+export DEBUGGER_FLAGS = debug
+export DEBUGSERVER_FLAGS = debug-server
+export RESET_FLAGS = reset
+
+# unwanted (CXXUWFLAGS) and extra (CXXEXFLAGS) flags for c++
+export CXXUWFLAGS +=
+export CXXEXFLAGS +=
+
+# use newLib nano-specs if available
+ifeq ($(shell $(LINK) -specs=nano.specs -E - 2>/dev/null >/dev/null </dev/null ; echo $$?),0)
+export LINKFLAGS += -specs=nano.specs -lc -lnosys
+endif
+
+# export board specific includes to the global includes-listing
+export INCLUDES += -I$(RIOTBOARD)/$(BOARD)/include

boards/nucleo-f401/board.c

@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2014 Freie Universität Berlin
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser General
+ * Public License v2.1. See the file LICENSE in the top level directory for more
+ * details.
+ */
+
+/**
+ * @ingroup     boards_nucleo-f401
+ * @{
+ *
+ * @file
+ * @brief       Board specific implementations for the STM32F4Discovery evaluation board
+ *
+ * @author      Hauke Petersen <hauke.petersen@fu-berlin.de>
+ *
+ * @}
+ */
+
+#include "board.h"
+
+static void leds_init(void);
+
+void board_init(void)
+{
+    /* initialize the boards LEDs, this is done first for debugging purposes */
+    leds_init();
+
+    /* initialize the CPU */
+    cpu_init();
+}
+
+/**
+ * @brief Initialize the boards on-board LEDs (LD2)
+ *
+ * The LED initialization is hard-coded in this function. As the LEDs are soldered
+ * onto the board they are fixed to their CPU pins.
+ *
+ * The LEDs are connected to the following pins:
+ * - LD2: PA5
+ */
+static void leds_init(void)
+{
+    /* enable clock for port GPIOD */
+    RCC->AHB1ENR |= RCC_AHB1ENR_GPIOAEN;
+
+    /* configure pins as general outputs */
+    LED_PORT->MODER &= ~(uint32_t)(0xC00);
+    LED_PORT->MODER |= (uint32_t)(0x400);
+    /* set output speed high-speed */
+    LED_PORT->OSPEEDR |= (uint32_t)(0xC00);
+    /* set output type to push-pull */
+    LED_PORT->OTYPER &= ~(uint32_t)(0x20);
+    /* disable pull resistors */
+    LED_PORT->PUPDR &= ~(uint32_t)(0xC00);
+
+    /* turn LED off */
+    LED_PORT->BSRRH = 0x20;
+}

boards/nucleo-f401/dist/openocd.cfg

@@ -0,0 +1 @@
+source [find board/st_nucleo_f4.cfg]

boards/nucleo-f401/include/board.h

@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2014 Freie Universität Berlin
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser General
+ * Public License v2.1. See the file LICENSE in the top level directory for more
+ * details.
+ */
+
+/**
+ * @defgroup    boards_stm32f4discovery STM32F4Discovery
+ * @ingroup     boards
+ * @brief       Board specific files for the STM32F4Discovery board
+ * @{
+ *
+ * @file
+ * @brief       Board specific definitions for the STM32F4Discovery evaluation board
+ *
+ * @author      Hauke Petersen <hauke.petersen@fu-berlin.de>
+ */
+
+#ifndef __BOARD_H
+#define __BOARD_H
+
+#include "cpu.h"
+#include "periph_conf.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Define the nominal CPU core clock in this board
+ */
+#define F_CPU               CLOCK_CORECLOCK
+
+/**
+ * @name Assign the hardware timer
+ */
+#define HW_TIMER            TIMER_0
+
+/**
+ * @name Define UART device and baudrate for stdio
+ * @{
+ */
+#define STDIO               UART_0
+#define STDIO_BAUDRATE      (115200U)
+#define STDIO_RX_BUFSIZE    (64U)
+/** @} */
+
+/**
+ * @name LED pin definitions
+ * @{
+ */
+#define LED_PORT            GPIOA
+#define LD1_PIN             (1 << 5)
+/** @} */
+
+/**
+ * @name Macros for controlling the on-board LEDs.
+ * @{
+ */
+#define LD1_ON              (LED_PORT->BSRRL = LD1_PIN)
+#define LD1_OFF             (LED_PORT->BSRRH = LD1_PIN)
+#define LD1_TOGGLE          (LED_PORT->ODR ^= LD1_PIN)
+
+/* for compatability to other boards */
+#define LED_RED_ON
+#define LED_RED_OFF
+#define LED_RED_TOGGLE
+
+#define LED_GREEN_ON        LD1_ON
+#define LED_GREEN_OFF       LD1_OFF
+#define LED_GREEN_TOGGLE    LD1_TOGGLE
+/** @} */
+
+/**
+ * @brief Initialize board specific hardware, including clock, LEDs and std-IO
+ */
+void board_init(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /** __BOARD_H */
+/** @} */