LED lights lit, C language, you can run keil. Achieve the first of a small non

代码说明：

点亮LED灯，C语言编写，可以在keil下运行。实现第一个小灯的不停闪烁，初学着可以好好参考。-LED lights lit, C language, you can run keil. Achieve the first of a small non-stop flashing lights, can make reference to the beginner.