LED 灯实验

1、硬件原理分析

2、简单C和汇编代码

Makefile

objs := start.o main.oledc.bin:$(objs)arm-linux-gnueabihf-ld -Timx6ul.lds -o ledc.elf $^arm-linux-gnueabihf-objcopy -O binary -S ledc.elf $@arm-linux-gnueabihf-objdump -D -m arm ledc.elf > ledc.dis%.o:%.sarm-linux-gnueabihf-gcc -Wall -nostdlib -c -O2 -o $@ $<%.o:%.Sarm-linux-gnueabihf-gcc -Wall -nostdlib -c -O2 -o $@ $<%.o:%.carm-linux-gnueabihf-gcc -Wall -nostdlib -c -O2 -o $@ $<clean:rm -rf *.o ledc.bin ledc.elf ledc.dis