CROSS_COMPILE = arm-none-eabi-
GCC_COMPILE_ARGS = -x assembler-with-cpp -c -O0 -g3 -mcpu=cortex-m4 -mthumb -Wall

build: start.o lab1.o ldscript.ld
	$(CROSS_COMPILE)gcc start.o lab1.o \
		-mcpu=cortex-m4 -mthumb -Wall \
		--specs=nosys.specs -nostdlib -lgcc -T./ldscript.ld \
		-o start.elf
	$(CROSS_COMPILE)objcopy -O binary -F elf32-littlearm start.elf start.bin

start.o: start.S lab1_v2.bin
	$(CROSS_COMPILE)gcc $(GCC_COMPILE_ARGS) -o start.o start.S

lab1.o: lab1.S
	$(CROSS_COMPILE)gcc $(GCC_COMPILE_ARGS) -o lab1.o lab1.S

lab1_v2.bin: lab1_v2.S lab1_v2.ld
	$(CROSS_COMPILE)gcc $(GCC_COMPILE_ARGS) -o lab1_v2.o lab1_v2.S
	$(CROSS_COMPILE)gcc lab1_v2.o -mcpu=cortex-m4 -mthumb -Wall \
		--specs=nosys.specs -nostdlib -lgcc -T./lab1_v2.ld \
		-o lab1_v2.elf
	$(CROSS_COMPILE)objcopy -O binary lab1_v2.elf lab1_v2.bin

qemu: build
	qemu-system-gnuarmeclipse --verbose --verbose --board STM32F4-Discovery \
		--mcu STM32F407VG -d unimp,guest_errors \
		--semihosting-config enable=on,target=native -s -S \
		--image start.bin

clean:
	rm *.o
	rm *.elf
	rm *.bin