add make file for very simple main.c file. uses libopencm3 and stm32duino-bootloader
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## This library is free software: you can redistribute it and/or modify
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## it under the terms of the GNU Lesser General Public License as published by
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## the Free Software Foundation, either version 3 of the License, or
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## (at your option) any later version.
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##
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## This library is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU Lesser General Public License for more details.
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##
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## You should have received a copy of the GNU Lesser General Public License
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## along with this library. If not, see <http://www.gnu.org/licenses/>.
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##
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## this file is based on Makefile from libopencm3 examples
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## available at https://github.com/libopencm3/libopencm3-examples
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# be silent per default, but 'make V=1' will show all compiler calls.
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ifneq ($(V),1)
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Q := @
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endif
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# the final binary name (without extension)
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BINARY = main
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# source files
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OBJS += $(BINARY).o
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# executables
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PREFIX ?= arm-none-eabi
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CC := $(PREFIX)-gcc
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CXX := $(PREFIX)-g++
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LD := $(PREFIX)-gcc
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AR := $(PREFIX)-ar
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AS := $(PREFIX)-as
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OBJCOPY := $(PREFIX)-objcopy
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OBJDUMP := $(PREFIX)-objdump
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GDB := $(PREFIX)-gdb
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# opencm3 libraries
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OPENCM3_DIR := libopencm3
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INCLUDE_DIR = $(OPENCM3_DIR)/include
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LIB_DIR = $(OPENCM3_DIR)/lib
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SCRIPT_DIR = $(OPENCM3_DIR)/scripts
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# verify if libopencm3 has been downloaded
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OPENCM3_DIR_EXISTS = $(shell [ -d $(OPENCM3_DIR) ] && echo 1 || echo 0 )
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ifeq ($(OPENCM3_DIR_EXISTS), 0)
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$(info run "git submodule init" and "git submodule update" before runnig make)
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$(error libopencm3 repository is not initialized)
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endif
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# device flag
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DEFS += -DSTM32F1
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# C flags
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CFLAGS += -Os -g
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CFLAGS += -Wall -Wundef -Wextra -Wshadow -Wimplicit-function-declaration
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CFLAGS += -Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes
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CFLAGS += -fno-common -ffunction-sections -fdata-sections
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CFLAGS += -MD
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CFLAGS += -I$(INCLUDE_DIR) $(DEFS)
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# linker script
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LDSCRIPT = stm32f103x8-dfu.ld
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# linker flags
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LDFLAGS += --static -nostartfiles
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LDFLAGS += -L$(LIB_DIR)
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LDFLAGS += -T$(LDSCRIPT)
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LDFLAGS += -Wl,-Map=$(*).map
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LDFLAGS += -Wl,--gc-sections
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ifeq ($(V),99)
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LDFLAGS += -Wl,--print-gc-sections
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endif
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# used libraries
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LIBNAME = opencm3_stm32f1
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LDLIBS += -l$(LIBNAME)
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LDLIBS += -Wl,--start-group -lc -lgcc -lnosys -Wl,--end-group
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# device specific flags
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FP_FLAGS ?= -msoft-float
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ARCH_FLAGS = -mthumb -mcpu=cortex-m3 $(FP_FLAGS) -mfix-cortex-m3-ldrd
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# OpenOCD configuration
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OOCD ?= openocd
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OOCD_INTERFACE ?= stlink-v2
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OOCD_TARGET ?= stm32f1x
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# board specific USB DFU bootloader
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BOOTLOADERS = STM32duino-bootloader
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BOOTLOADER = $(BOOTLOADERS)/STM32F1/binaries/generic_boot20_pa1.bin
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# verify if STM32duino-bootloader has been downloaded
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BOOTLOADER_EXISTS = $(shell [ -f $(BOOTLOADER) ] && echo 1 || echo 0 )
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ifeq ($(BOOTLOADER_EXISTS), 0)
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$(info run "git submodule init" and "git submodule update" before runnig make)
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$(error STM32duino-bootloader repository is not initialized)
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endif
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# compile target rules
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all: elf
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elf: $(BINARY).elf
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bin: $(BINARY).bin
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hex: $(BINARY).hex
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srec: $(BINARY).srec
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list: $(BINARY).list
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%.bin: %.elf
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$(Q)$(OBJCOPY) -Obinary $(<) $(@)
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%.hex: %.elf
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$(Q)$(OBJCOPY) -Oihex $(<) $(@)
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%.srec: %.elf
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$(Q)$(OBJCOPY) -Osrec $(<) $(@)
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%.list: %.elf
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$(Q)$(OBJDUMP) -S $(<) > $(@)
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%.map: %.elf
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@# it's generated along with the elf
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%.elf: $(OBJS) $(LDSCRIPT) $(LIB_DIR)/lib$(LIBNAME).a
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$(info compiling $(@))
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$(Q)$(LD) $(LDFLAGS) $(ARCH_FLAGS) $(OBJS) $(LDLIBS) -o $(@)
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%.o: %.c
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@#printf " CC $(*).c\n"
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$(Q)$(CC) $(CFLAGS) $(ARCH_FLAGS) -o $(@) -c $(<)
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clean:
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$(Q)$(RM) *.o *.d *.elf *.bin *.hex *.srec *.list *.map
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# make libopencm3 if not done
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$(LIB_DIR)/lib$(LIBNAME).a:
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$(info compiling libopencm3 library)
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$(Q)$(MAKE) -C $(OPENCM3_DIR)
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bootloader: $(BOOTLOADER)
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$(info flashing USB DFU bootloader $(<))
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$(Q)$(OOCD) --file interface/$(OOCD_INTERFACE).cfg --file target/$(OOCD_TARGET).cfg --command "init" --command "reset init" --command "flash write_image erase $(<) 0x08000000" --command "reset" --command "shutdown" 2> /dev/null
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flash: flash-swd
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flash-swd: $(BINARY).hex
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$(info flashing $(<) using SWD)
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$(Q)$(OOCD) --file interface/$(OOCD_INTERFACE).cfg --file target/$(OOCD_TARGET).cfg --command "init" --command "reset init" --command "flash write_image erase $(<)" --command "reset" --command "shutdown" 2> /dev/null
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flash-dfu: $(BINARY).bin
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$(info flashing $(<) using DFU)
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$(Q)dfu-util --device 1eaf:0003 --cfg 1 --intf 0 --alt 2 --reset --download $(<)
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.PHONY: clean elf bin hex srec list bootloader flash flash-swd flash-dfu
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-include $(OBJS:.o=.d)
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