board/cpu: Added support for the stm32f3discovery board and stm32f3 cpu

boards/stm32f3discovery/Makefile

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

boards/stm32f3discovery/Makefile.include

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+# define the cpu used by the stm32f3-discovery board
+export CPU = stm32f3
+export CPU_MODEL = stm32f303vc
+
+#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 AR = $(PREFIX)ar
+export AS = $(PREFIX)as
+export LINK = $(PREFIX)gcc
+export SIZE = $(PREFIX)size
+export OBJCOPY = $(PREFIX)objcopy
+export TERMPROG = $(RIOTBASE)/dist/tools/pyterm/pyterm.py
+export FLASHER = st-flash
+export DEBUGGER = $(RIOTBOARD)/$(BOARD)/dist/debug.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 -Os -Wall -Wstrict-prototypes $(CPU_USAGE) $(FPU_USAGE) -mlittle-endian -mthumb -mthumb-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) $(FPU_USAGE) -mlittle-endian -static -lgcc -mthumb -mthumb-interwork -nostartfiles
+export LINKFLAGS += -T$(LINKERSCRIPT)
+export OFLAGS = -O binary
+export FFLAGS = write bin/$(BOARD)/$(APPLICATION).hex 0x8000000
+export DEBUGGER_FLAGS = $(RIOTBOARD)/$(BOARD)/dist/gdb.conf $(BINDIR)/$(APPLICATION).elf
+
+# 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/stm32f3discovery/board.c

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+/*
+ * 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     board_stm32f3discovery
+ * @{
+ *
+ * @file
+ * @brief       Board specific implementations for the STM32F3Discovery 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 */
+    leds_init();
+
+    /* initialize the CPU */
+    cpu_init();
+}
+
+/**
+ * @brief Initialize the boards on-board LEDs (LD3 to LD10)
+ *
+ * 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:
+ * - LD3:   PE9
+ * - LD4:   PE8
+ * - LD5:   PE10
+ * - LD6:   PE15
+ * - LD7:   PE11
+ * - LD8:   PE14
+ * - LD9:   PE12
+ * - LD10:  PE13
+ */
+static void leds_init(void)
+{
+    /* enable clock for port GPIOE */
+    RCC->AHBENR |= RCC_AHBENR_GPIOEEN;
+
+    /* set output speed to 50MHz */
+    LED_PORT->OSPEEDR |= 0xffff0000;
+    /* set output type to push-pull */
+    LED_PORT->OTYPER &= ~(0x0000ff00);
+    /* configure pins as general outputs */
+    LED_PORT->MODER &= ~(0xffff0000);
+    LED_PORT->MODER |= 0x55550000;
+    /* disable pull resistors */
+    LED_PORT->PUPDR &= ~(0xffff0000);
+
+    /* turn all LEDs off */
+    LED_PORT->BRR = 0xff00;
+}

boards/stm32f3discovery/dist/debug.sh

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+#!/bin/sh
+
+echo "Debugging $1"
+arm-none-eabi-gdb -tui -command=$1 $2

boards/stm32f3discovery/dist/gdb.conf

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+tar extended-remote :4242

boards/stm32f3discovery/include/board.h

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+/*
+ * 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    board_stm32f3discovery STM32F3Discovery
+ * @ingroup     boards
+ * @brief       Board specific files for the STM32F3Discovery board
+ * @{
+ *
+ * @file
+ * @brief       Board specific definitions for the STM32F3Discovery evaluation board
+ *
+ * @author      Hauke Petersen <hauke.petersen@fu-berlin.de>
+ */
+
+#ifndef __BOARD_H
+#define __BOARD_H
+
+#include "cpu.h"
+
+/**
+ * Define the nominal CPU core clock in this board
+ */
+#define F_CPU               (72000000UL)
+
+/**
+ * @name Assign the hardware timer
+ */
+#define HW_TIMER            TIMER_0
+
+/**
+ * @name Define the UART used for stdio
+ * @{
+ */
+#define STDIO               UART_0
+#define STDIO_BAUDRATE      (115200U)
+#define STDIO_BUFSIZE       (64U)
+/** @} */
+
+/**
+ * @name LED pin definitions
+ * @{
+ */
+#define LED_PORT            GPIOE
+#define LD3_PIN             (1 << 9)
+#define LD4_PIN             (1 << 8)
+#define LD5_PIN             (1 << 10)
+#define LD6_PIN             (1 << 15)
+#define LD7_PIN             (1 << 11)
+#define LD8_PIN             (1 << 14)
+#define LD9_PIN             (1 << 12)
+#define LD10_PIN            (1 << 13)
+/** @} */
+
+/**
+ * @name Macros for controlling the on-board LEDs.
+ * @{
+ */
+#define LD3_ON              (LED_PORT->BSRRL = LD3_PIN)
+#define LD3_OFF             (LED_PORT->BSRRH = LD3_PIN)
+#define LD3_TOGGLE          (LED_PORT->ODR ^= LD3_PIN)
+#define LD4_ON              (LED_PORT->BSRRL = LD4_PIN)
+#define LD4_OFF             (LED_PORT->BSRRH = LD4_PIN)
+#define LD4_TOGGLE          (LED_PORT->ODR ^= LD4_PIN)
+#define LD5_ON              (LED_PORT->BSRRL = LD5_PIN)
+#define LD5_OFF             (LED_PORT->BSRRH = LD5_PIN)
+#define LD5_TOGGLE          (LED_PORT->ODR ^= LD5_PIN)
+#define LD6_ON              (LED_PORT->BSRRL = LD6_PIN)
+#define LD6_OFF             (LED_PORT->BSRRH = LD6_PIN)
+#define LD6_TOGGLE          (LED_PORT->ODR ^= LD6_PIN)
+#define LD7_ON              (LED_PORT->BSRRL = LD7_PIN)
+#define LD7_OFF             (LED_PORT->BSRRH = LD7_PIN)
+#define LD7_TOGGLE          (LED_PORT->ODR ^= LD7_PIN)
+#define LD8_ON              (LED_PORT->BSRRL = LD8_PIN)
+#define LD8_OFF             (LED_PORT->BSRRH = LD8_PIN)
+#define LD8_TOGGLE          (LED_PORT->ODR ^= LD8_PIN)
+#define LD9_ON              (LED_PORT->BSRRL = LD9_PIN)
+#define LD9_OFF             (LED_PORT->BSRRH = LD9_PIN)
+#define LD9_TOGGLE          (LED_PORT->ODR ^= LD9_PIN)
+#define LD10_ON             (LED_PORT->BSRRL = LD10_PIN)
+#define LD10_OFF            (LED_PORT->BSRRH = LD10_PIN)
+#define LD10_TOGGLE         (LED_PORT->ODR ^= LD10_PIN)
+/* for compatability to other boards */
+#define LED_GREEN_ON        LD4_ON
+#define LED_GREEN_OFF       LD4_OFF
+#define LED_GREEN_TOGGLE    LD4_TOGGLE
+#define LED_RED_ON          LD5_ON
+#define LED_RED_OFF         LD5_OFF
+#define LED_RED_TOGGLE      LD5_TOGGLE
+/** @} */
+
+/**
+ * @brief Initialize board specific hardware, including clock, LEDs and std-IO
+ */
+void board_init(void);
+
+#endif /** __BOARD_H */
+/** @} */