stm32l1: initial port for the nucleo-l1 board and stm32l1 cpu

boards/nucleo-l1/Makefile

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+MODULE =$(BOARD)_base
+
+include $(RIOTBASE)/Makefile.base

boards/nucleo-l1/Makefile.features

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+FEATURES_PROVIDED += periph_gpio periph_uart periph_spi periph_i2c periph_cpuid
+FEATURES_PROVIDED += cpp

boards/nucleo-l1/Makefile.include

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+## the cpu to build for
+export CPU = stm32l1
+export CPU_MODEL = stm32l152ret6
+
+#define the default port depending on the host OS
+OS := $(shell uname)
+ifeq ($(OS),Linux)
+  PORT ?= /dev/ttyACM0
+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 TERMPROG = $(RIOTBASE)/dist/tools/pyterm/pyterm
+export FLASHER = $(RIOTBOARD)/$(BOARD)/dist/flash.sh
+export DEBUGGER = $(RIOTBOARD)/$(BOARD)/dist/debug.sh
+export DEBUGSERVER = $(RIOTBOARD)/$(BOARD)/dist/debug-server.sh
+export RESET = $(RIOTBOARD)/$(BOARD)/dist/reset.sh
+
+# unwanted (CXXUWFLAGS) and extra (CXXEXFLAGS) flags for c++
+export CXXUWFLAGS +=
+export CXXEXFLAGS +=
+
+# define build specific options
+export CPU_USAGE = -mcpu=cortex-m3
+export FPU_USAGE =
+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 += -ggdb -g3 -std=gnu99 $(CPU_USAGE) $(FPU_USAGE) -mlittle-endian -static -lgcc -mthumb -mthumb-interwork -nostartfiles
+# $(LINKERSCRIPT) is specified in cpu/Makefile.include
+export LINKFLAGS += -T$(LINKERSCRIPT)
+export OFLAGS = -O binary
+export FFLAGS = $(HEXFILE)
+export DEBUGGER_FLAGS = $(RIOTBOARD)/$(BOARD)/dist/gdb.conf $(ELFFILE)
+export TERMFLAGS += -p "$(PORT)"
+
+# use the nano-specs of the NewLib when 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-l1/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_nucleo-l1
+ * @{
+ *
+ * @file        board.c
+ * @brief       Board specific implementations for the nucleo-l1 board
+ *
+ * @author      Thomas Eichinger <thomas.eichinger@fu-berlin.de>
+ *
+ * @}
+ */
+
+#include "board.h"
+#include "cpu.h"
+
+static void leds_init(void);
+
+void board_init(void)
+{
+    /* initialize the CPU */
+    cpu_init();
+
+    /* initialize the boards LEDs */
+    leds_init();
+}
+
+/**
+ * @brief Initialize the boards on-board LEDs
+ *
+ * The LED initialization is hard-coded in this function. As the LED is soldered
+ * onto the board it is fixed to its CPU pins.
+ *
+ * The green LED is connected to pin PA5
+ */
+static void leds_init(void)
+{
+    /* enable clock for port GPIOE */
+    RCC->AHBENR |= RCC_AHBENR_GPIOAEN;
+
+    /* set output speed to 50MHz */
+    LED_GREEN_PORT->OSPEEDR |= 0x00000c00;
+    /* set output type to push-pull */
+    LED_GREEN_PORT->OTYPER &= ~(0x00000020);
+    /* configure pins as general outputs */
+    LED_GREEN_PORT->MODER &= ~(0x00000c00);
+    LED_GREEN_PORT->MODER |= 0x00000400;
+    /* disable pull resistors */
+    LED_GREEN_PORT->PUPDR &= ~(0x00000c00);
+
+    /* turn all LEDs off */
+    LED_GREEN_PORT->BRR = 0x00c0;
+}

boards/nucleo-l1/dist/debug-server.sh

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+#!/bin/sh
+
+echo "##"
+echo "## Starting debug server"
+echo "##"
+
+openocd -f "${RIOTBOARD}/${BOARD}/dist/openocd.cfg" \
+    -c "init" \
+    -c "targets" \
+    -c "reset halt"

boards/nucleo-l1/dist/debug.sh

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+#!/bin/sh
+
+if [ ! -f "$2" ]; then
+    echo "ELF-file $2 does not exist"
+    exit 1
+fi
+
+echo "##"
+echo "## Debugging $2"
+echo "##"
+arm-none-eabi-gdb -tui -command="$1" $2

boards/nucleo-l1/dist/flash.sh

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+#!/bin/bash
+
+echo "##"
+echo "## Flashing $1"
+echo "##"
+
+openocd -f "${RIOTBOARD}/${BOARD}/dist/openocd.cfg" \
+    -c "init" \
+    -c "targets" \
+    -c "reset halt" \
+    -c "program $1 0x8000000 verify" \
+    -c "reset run"\
+    -c "shutdown"

boards/nucleo-l1/dist/gdb.conf

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+tar extended-remote :3333

boards/nucleo-l1/dist/openocd.cfg

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+# stml1 Target
+source [find interface/stlink-v2-1.cfg]
+
+transport select hla_swd
+
+source [find target/stm32l.cfg]

boards/nucleo-l1/dist/reset.sh

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+#!/bin/bash
+
+echo "##"
+echo "## Resetting $1"
+echo "##"
+
+openocd -f "${RIOTBOARD}/${BOARD}/dist/openocd.cfg" \
+    -c "init" \
+    -c "reset run"\
+    -c "shutdown"

boards/nucleo-l1/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_nucleo-l1 nucleo-l1
+ * @ingroup     boards
+ * @brief       Board specific files for the nucleo-l1 board.
+ * @{
+ *
+ * @file
+ * @brief       Board specific definitions for the nucleo-l1 board.
+ *
+ * @author      Thomas Eichinger <thomas.eichinger@fu-berlin.de>
+ */
+
+#ifndef BOARD_H_
+#define BOARD_H_
+
+#include <stdint.h>
+
+#include "cpu.h"
+#include "periph_conf.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @name Define the nominal CPU core clock in this board
+ */
+#define F_CPU               CLOCK_CORECLOCK
+
+/**
+ * @name Define the UART to be used as stdio and its baudrate
+ * @{
+ */
+#define STDIO               UART_0
+#define STDIO_BAUDRATE      (115200U)
+#define STDIO_RX_BUFSIZE    (64U)
+/** @} */
+
+/**
+ * @name Assign the hardware timer
+ */
+#define HW_TIMER            TIMER_0
+
+/**
+ * @name LED pin definitions
+ * @{
+ */
+#define LED_GREEN_PORT      (GPIOA)
+#define LED_GREEN_PIN       (5)
+/** @} */
+
+/**
+ * @name Macros for controlling the on-board LEDs.
+ * @{
+ */
+#define LED_RED_ON
+#define LED_RED_OFF
+#define LED_RED_TOGGLE
+
+#define LED_GREEN_ON        (LED_GREEN_PORT->ODR &= ~(1<<LED_GREEN_PIN))
+#define LED_GREEN_OFF       (LED_GREEN_PORT->ODR |= (1<<LED_GREEN_PIN))
+#define LED_GREEN_TOGGLE    (LED_GREEN_PORT->ODR ^= (1<<LED_GREEN_PIN))
+
+#define LED_ORANGE_ON
+#define LED_ORANGE_OFF
+#define LED_ORANGE_TOGGLE
+/** @} */
+
+/**
+ * @name Define the type for the radio packet length for the transceiver
+ */
+typedef uint8_t radio_packet_length_t;
+
+/**
+ * @brief Initialize board specific hardware, including clock, LEDs and std-IO
+ */
+void board_init(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* BOARD_H_ */
+/** @} */
+/** @} */