Initial commit

Signed-off-by: LAMBS Pierre-Antoine <[email protected]>

.gitignore

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+*.elf
+*.o
+*.bin
+*.swp
+tags
+
+libopencm3/
+toolchain/

README

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+Simple projet for my stm32f103 (the cheap 3$ board)
+
+Install 
+	cross-arm-linux-gnueabi 
+	cross-arm-linux-gnueabi-libc
+	openocd
+
+Build: 
+
+	cd src
+	make
+
+Flash:
+	Connect stm flasher
+	cd src
+	make write
+
+
+sudo openocd -f ../config/openocd.cfg -c init -c "halt" -c "stm32f1x mass_erase 0" -c "flash erase_check 0" -c "flash write_bank 0 stm32_firmware.bin 0" -c "reset run"

config/openocd.cfg

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+source [find interface/stlink-v2.cfg]
+
+transport select hla_swd
+
+source [find target/stm32f1x.cfg]

make_dev_env.sh

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+#!/bin/sh
+
+printf "Extract toolchain from archive\n"
+
+tar xvf archive/gcc-arm-none-eabi.tar.bz2 -C toolchain
+
+printf "Extract libopencm3 from archive\n"
+
+tar xvf archive/libopencm3.tar -C libopencm3
+
+exit 0

src/Makefile

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+BIN=stm32_firmware.bin
+ELF=stm32_firmware.elf
+
+LIBOPENCM3=../libopencm3/lib/libopencm3_stm32f1.a
+
+SRC=main.c
+
+LKR_SCRIPT = linker/stm32f103x8.ld
+
+ARM_TOOLCHAIN_PATH=../toolchain/bin
+ARM_TOOLCHAIN_PRFIX=arm-none-eabi-
+
+CROSS_COMPILE=$(ARM_TOOLCHAIN_PATH)/$(ARM_TOOLCHAIN_PRFIX)
+
+CC=$(CROSS_COMPILE)gcc
+AR=$(CROSS_COMPILE)ar
+CP=$(CROSS_COMPILE)objcopy
+LD=$(CROSS_COMPILE)ld
+LDCONFIG=$(CROSS_COMPILE)ldconfig
+STRIP=$(CROSS_COMPILE)strip
+
+INCLUDE=-I.                                                     \
+        -I./../libopencm3/include/libopencmsis/stm32/f1/        \
+        -I./../libopencm3/include/
+
+CFLAGS=-c -fno-common -O0 -g -mcpu=cortex-m3 -mthumb -DSTM32F1
+LDFLAGS=-nostartfiles -specs=nano.specs -mcpu=cortex-m3 -mthumb -T$(LKR_SCRIPT) $(LIBOPENCM3) 
+CPFLAGS=-Obinary
+ASFLAGS=-c -mcpu=cortex-m3 -mthumb 
+
+OBJECTS=$(SRC:.c=.o)
+
+all:$(BIN)
+	@echo "[ build $(BIN) ]"
+
+%.o:%.c
+	@ echo Cross Compile
+	@$(CC) $(INCLUDE) $(CFLAGS) $< -o $@
+
+$(ELF):$(OBJECTS)
+	@ echo Create ELF
+	@$(CC) -o $(ELF) $(OBJECTS) $(LDFLAGS)
+
+$(BIN): $(LIBOPENCM3) $(ELF)
+	@ echo objcopy elf to bin
+	@ $(CP) $(CPFLAGS) $(ELF) $(BIN)
+
+libopencm3:
+	cd ../libopencm3/ && PATH=$PATH:$PWD/../toolchain/bin/ $(MAKE)
+
+.PHONY:clean
+
+clean:
+	@echo "[ clean project ]"
+	@rm -f $(OBJECTS)
+	@rm -f $(BIN)
+	@rm -f $(ELF)
+
+clean_lib:
+	@cd ../libopencm3/ && $(MAKE) clean
+
+write:$(ELF)
+	openocd -f ../config/openocd.cfg -c "init" \
+									 -c "reset halt" \
+									 -c "flash probe 0" \
+									 -c "flash protect 0 0 63 off" \
+									 -c "reset halt" \
+									 -c "stm32f1x mass_erase 0" \
+									 -c "flash write_image stm32_firmware.elf" \
+									 -c "reset run" \
+									 -c "exit"
+
+
+
+
+
+
+
+
+
+
+
+
+

src/linker/libopencm3_stm32f1.ld

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+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <[email protected]>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Generic linker script for STM32 targets using libopencm3. */
+
+/* Memory regions must be defined in the ld script which includes this one. */
+
+/* Enforce emmition of the vector table. */
+EXTERN (vector_table)
+
+/* Define the entry point of the output file. */
+ENTRY(reset_handler)
+
+/* Define sections. */
+SECTIONS
+{
+	.text : {
+		*(.vectors)	/* Vector table */
+		*(.text*)	/* Program code */
+		. = ALIGN(4);
+		*(.rodata*)	/* Read-only data */
+		. = ALIGN(4);
+	} >rom
+
+	/* C++ Static constructors/destructors, also used for __attribute__
+	 * ((constructor)) and the likes */
+	.preinit_array : {
+		. = ALIGN(4);
+		__preinit_array_start = .;
+		KEEP (*(.preinit_array))
+		__preinit_array_end = .;
+	} >rom
+	.init_array : {
+		. = ALIGN(4);
+		__init_array_start = .;
+		KEEP (*(SORT(.init_array.*)))
+		KEEP (*(.init_array))
+		__init_array_end = .;
+	} >rom
+	.fini_array : {
+		. = ALIGN(4);
+		__fini_array_start = .;
+		KEEP (*(.fini_array))
+		KEEP (*(SORT(.fini_array.*)))
+		__fini_array_end = .;
+	} >rom
+
+	/*
+	 * Another section used by C++ stuff, appears when using newlib with
+	 * 64bit (long long) printf support
+	 */
+	.ARM.extab : {
+		*(.ARM.extab*)
+	} >rom
+	.ARM.exidx : {
+		__exidx_start = .;
+		*(.ARM.exidx*)
+		__exidx_end = .;
+	} >rom
+
+	. = ALIGN(4);
+	_etext = .;
+
+	.data : {
+		_data = .;
+		*(.data*)	/* Read-write initialized data */
+		. = ALIGN(4);
+		_edata = .;
+	} >ram AT >rom
+	_data_loadaddr = LOADADDR(.data);
+
+	.bss : {
+		*(.bss*)	/* Read-write zero initialized data */
+		*(COMMON)
+		. = ALIGN(4);
+		_ebss = .;
+	} >ram
+
+	/*
+	 * The .eh_frame section appears to be used for C++ exception handling.
+	 * You may need to fix this if you're using C++.
+	 */
+	/DISCARD/ : { *(.eh_frame) }
+
+	. = ALIGN(4);
+	end = .;
+}
+
+PROVIDE(_stack = ORIGIN(ram) + LENGTH(ram));
+

src/linker/stm32f103x8.ld

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+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2015 Karl Palsson <[email protected]>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Linker script for STM32F103x8, 64k flash, 20k RAM. */
+
+/* Define memory regions. */
+MEMORY
+{
+	rom (rx) : ORIGIN = 0x08000000, LENGTH = 64K
+	ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
+}
+
+/* Include the common ld script. */
+INCLUDE linker/libopencm3_stm32f1.ld
+

src/main.c

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+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+#include "main.h"
+
+int main(void)
+{
+	int i;
+	rcc_periph_clock_enable(RCC_GPIOC);
+
+	gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO13);
+
+	while(1){
+
+		gpio_toggle(GPIOC, GPIO13); /* LED on/off */
+		for (i = 0; i < 400000; i++){ /* Wait a bit. */
+			__asm__("nop");
+		}
+
+	}
+	return 0;
+}

src/main.h

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+#ifndef __MAIN_H__
+#define __MAIN_H__
+
+
+#endif