Das Makefile habe ich in einem Unterverzeichnis foo/obj und die Quellen dann in foo, also keine komplizierte Projektstruktur. Wenn man Quellen und Objekte im gleichen Verzeichnis mischen will, wird's noch einfacher.
Code:
## Makefile targets
# all make hex and elf files
# clean remove intermediate and binary files
# reset reset the target
# burn upload program (firmware) to target
# burn-all upload program (firmware) and persistent data (EEPROM) to target
# Generated files in the directory
# *.s: Assembler output of GCC (GNU AVR assembly as ASCII)
# *.o: Objects (elf32-avr)
# *.elf: final binary (elf32-avr)
# *.hex: final binary (Intel HEX)
# *.lst: Disassembly of *.elf (ASCII)
# *.map: map file (location info, ASCII)
# The project's base name to name hex- and elf-files and such
PRG = eBook
# C sources that make up the project
SRC = main.c vfd-put.c vfd.c ebook.c taster.c main.c timer.c
# we run on an AVR ATmega8
MCU_TARGET = atmega8
# You must change the Port and Progger to fit your hardware.
# siprog3 is home brew
AVRDUDE = avrdude.exe -p $(MCU_TARGET) -P com1 -c siprog3
OPTIMIZE = -Os
INCLUDES = -I../include
DEFS = -DF_CPU=8000000
CC = avr-gcc -mmcu=$(MCU_TARGET)
LD = $(CC)
OBJCOPY = avr-objcopy
OBJDUMP = avr-objdump
# Targets dealing with C sources
.PHONY: all size lst text eeprom depend
# clean targets
.PHONY: clean
# Targets that use avrdude
.PHONY: reset burn burn-all
CFLAGS = -Wall $(OPTIMIZE) $(DEFS) $(INCLUDES) -Winline -fno-keep-inline-functions
LDFLAGS = -Wl,-Map,$(PRG).map -Wl,-section-start=.eeprom=0x810001
ASMFLAGS = -dp -save-temps -fverbose-asm
# object and assembler files. we build *.o out of *.s (not *.c)
OBJ = $(patsubst %.c, %.o, $(SRC))
ASM = $(patsubst %.c, %.s, $(SRC))
all: depend $(ASM) $(PRG).elf lst text eeprom
depend:
$(CC) -MM $(addprefix ../, $(SRC)) -mmcu=$(MCU_TARGET) $(DEFS) $(INCLUDES) |\
sed -e 's/\.o:/.s:/' > .depend
size:
avr-size -x $(OBJ)
@echo AVR $(MCU_TARGET) Memory Usage:
@avr-size -C --mcu=$(MCU_TARGET) $(PRG).elf | grep -E '^(Data)|(Pro)'
$(PRG).elf: $(OBJ)
$(CC) $(LDFLAGS) -o $@ $^ $(LIBS)
-include .depend
%.s: ../%.c Makefile
$(CC) -S $< -o $@ $(ASMFLAGS) $(CFLAGS)
%.o: %.s
$(CC) -x assembler $< -c -o $@
# Rules to clean up
clean:
rm -f .depend $(wildcard *.o *.s *.i *.map *.lst *.elf *.hex *.map *~ ../*~)
# Rules to generate disassembly
lst: $(PRG).lst
%.lst: %.elf
$(OBJDUMP) -h -S -j .data -j .eeprom -j .text $< > $@
# Rules for building the .text rom images
text: $(PRG).hex
%.hex: %.elf
$(OBJCOPY) -j .text -j .data -O ihex $< $@
# Rules for building the .eeprom rom images
eeprom: $(PRG)_eeprom.hex
%_eeprom.hex: %.elf
$(OBJCOPY) -j .eeprom --change-section-lma .eeprom=1 -O ihex $< $@
# Rules with avrdude
reset:
$(AVRDUDE)
burn:
$(AVRDUDE) -V -U flash:w:"$(PRG).hex"
burn-all:
$(AVRDUDE) -V -U flash:w:"$(PRG).hex" -U eeprom:w:"$(PRG)_eeprom.hex"
Bei Fragen fragen. Wichtig ist, daß die Einrückungen TABs sind. Ein gscheiter Editor (zB emacs) sollte das erkennen bzw. anmeckern, falls nicht.
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