CC := avr-gcc LD := avr-ld OBJCOPY := avr-objcopy OBJDUMP := avr-objdump SIZE := avr-size TARGET = twiboot SOURCE = $(wildcard *.c) # select MCU MCU = atmega88 AVRDUDE_PROG := -c avr910 -b 115200 -P /dev/ttyUSB0 #AVRDUDE_PROG := -c dragon_isp -P usb # --------------------------------------------------------------------------- ifeq ($(MCU), atmega8) # (8Mhz internal RC-Osz., 2.7V BOD) AVRDUDE_MCU=m8 AVRDUDE_FUSES=lfuse:w:0x84:m hfuse:w:0xda:m BOOTLOADER_START=0x1C00 endif ifeq ($(MCU), atmega88) # (8Mhz internal RC-Osz., 2.7V BOD) AVRDUDE_MCU=m88 AVRDUDE_FUSES=lfuse:w:0xc2:m hfuse:w:0xdd:m efuse:w:0xfa:m BOOTLOADER_START=0x1C00 endif ifeq ($(MCU), atmega168) # (8Mhz internal RC-Osz., 2.7V BOD) AVRDUDE_MCU=m168 -F AVRDUDE_FUSES=lfuse:w:0xc2:m hfuse:w:0xdd:m efuse:w:0xfa:m BOOTLOADER_START=0x3C00 endif ifeq ($(MCU), atmega328p) # (8Mhz internal RC-Osz., 2.7V BOD) AVRDUDE_MCU=m328p -F AVRDUDE_FUSES=lfuse:w:0xc2:m hfuse:w:0xda:m efuse:w:0xfd:m BOOTLOADER_START=0x7800 endif # --------------------------------------------------------------------------- CFLAGS = -pipe -g -Os -mmcu=$(MCU) -Wall -fdata-sections -ffunction-sections CFLAGS += -Wa,-adhlns=$(*F).lst -DBOOTLOADER_START=$(BOOTLOADER_START) LDFLAGS = -Wl,-Map,$(@:.elf=.map),--cref,--relax,--gc-sections,--section-start=.text=$(BOOTLOADER_START) # --------------------------------------------------------------------------- $(TARGET): $(TARGET).elf @$(SIZE) -B -x --mcu=$(MCU) $< $(TARGET).elf: $(SOURCE:.c=.o) @echo " Linking file: $@" @$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^ @$(OBJDUMP) -h -S $@ > $(@:.elf=.lss) @$(OBJCOPY) -j .text -j .data -O ihex $@ $(@:.elf=.hex) @$(OBJCOPY) -j .text -j .data -O binary $@ $(@:.elf=.bin) %.o: %.c $(MAKEFILE_LIST) @echo " Building file: $<" @$(CC) $(CFLAGS) -o $@ -c $< clean: rm -rf $(SOURCE:.c=.o) $(SOURCE:.c=.lst) $(addprefix $(TARGET), .elf .map .lss .hex .bin) install: $(TARGET).elf avrdude $(AVRDUDE_PROG) -p $(AVRDUDE_MCU) -U flash:w:$(<:.elf=.hex) fuses: avrdude $(AVRDUDE_PROG) -p $(AVRDUDE_MCU) $(patsubst %,-U %, $(AVRDUDE_FUSES))