86 lines
2.5 KiB
Makefile
86 lines
2.5 KiB
Makefile
# Arduino Nano with ATmega328P programming script
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# detailed configuration on http://arduino.cc/en/uploads/Main/boards.txt
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# required packages: avrdude gcc-avr avr-libc
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# the output firmware name
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TARGET=scale
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# to compile
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CC=avr-gcc
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OBJDUMP=avr-objdump
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OBJCOPY=avr-objcopy
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SIZE=avr-size
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CFLAGS=-g -Wall -Werror -O3 -std=c99
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# for this project we need float capable printf
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LDFLAGS=-lm -Wl,-u,vfprintf -lprintf_flt
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# the target (arduino nano)
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DEVICE=atmega328p
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F_CPU=16000000UL
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# the flasher
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PROGRAMMER=arduino
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PORT=/dev/ttyUSB0
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# to flash
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# use the aduino bootlaoder, with a baudrate of 57600
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# reset the device to start bootlaoder
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FLASHER=avrdude -p $(DEVICE) -c $(PROGRAMMER) -P $(PORT) -b 57600 -D
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# source files to compile
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SRC = $(wildcard *.c)
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# header files.
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HEADER = $(SRC:.c=.h)
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# object files.
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OBJ = $(SRC:.c=.o)
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# listing files.
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LST = $(SRC:.c=.lst)
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all: compile $(TARGET).lst flash
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echo "EEPROM has to be programmed separately"
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debug: CFLAGS += -DDEBUG
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debug: all
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# reset board by setting DTR
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# the capacitor on DTR with create a pulse on RESET
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# after reset the bootloader is start
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# the bootloader can be used to reflash the device
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reset:
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stty 57600 raw ignbrk hup < $(PORT)
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# flash the device using the internal bootloader
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flash: $(TARGET).hex reset
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$(FLASHER) -U flash:w:$(TARGET).hex:i
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# write EEPROM on the device
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eeprom: $(TARGET)_eeprom.hex reset
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$(FLASHER) -U eeprom:w:$(TARGET)_eeprom.hex:i
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# write bootloader and fuses
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bootloader:
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wget http://code.google.com/p/arduino/source/browse/trunk/hardware/arduino/bootloaders/atmega/ATmegaBOOT_168_atmega328.hex
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avrdude -p $(DEVICE) -c usbtiny -U lfuse:w:0xff:m -U hfuse:w:0xda:m -U efuse:w:0x05:m -U flash:w:ATmegaBOOT_168_atmega328.hex:i
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rm ATmegaBOOT_168_atmega328.hex
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# create main target firmware
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compile: $(TARGET).elf
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$(SIZE) --format=avr --mcu=$(DEVICE) $(TARGET).elf
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# compile source files
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%.o: %.c %.h
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$(CC) $(CFLAGS) -I. -mmcu=$(DEVICE) -DF_CPU=$(F_CPU) -c -o $@ $<
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# link compiled files
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%.elf: $(OBJ)
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$(CC) $(LDFLAGS) -I. -mmcu=$(DEVICE) -DF_CPU=$(F_CPU) -Wl,-Map=$(TARGET).map,--cref -o $@ $(OBJ)
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# create extended listing for additional information
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%.lst: %.elf
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$(OBJDUMP) --section-headers --source $< > $@
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# create flashable ihex from firmware
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%.hex: %.elf
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$(OBJCOPY) --only-section .text --only-section .data --output-target ihex $< $@
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%_eeprom.hex: %.elf
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$(OBJCOPY) --only-section .eeprom --change-section-lma .eeprom=0 --output-target ihex $< $@
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clean:
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rm -f $(TARGET) $(TARGET).hex $(TARGET).elf $(TARGET).lst $(TARGET).map $(LST) $(OBJ)
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