①led_sp.bin: start.o led.o

#led_sp.bin是由 start.o 和 led.o 生成

②arm-linux-ld -Ttext 0x0 -o led_sp.elf $^
arm-linux-objcopy -O binary led_sp.elf led_sp.bin
arm-linux-objdump -D led_sp.elf > led_sp_elf.dis
gcc mkv210_image.c -o mkmini210
./mkmini210 led_sp.bin 210.bin

%.o : %.S
arm-linux-gcc -o $@ $< -c

%.o : %.c
arm-linux-gcc -o $@ $< -c

clean:
rm *.o *.elf *.bin *.dis mkmini210 -f

Makefile解析