【HC6800-MS】点灯

代码如下：

#include <reg51.h>

#define LED P2  //重命名

 void load(unsigned int timer) //延时函数

 {

    unsigned int a;

  unsigned int b;

  for(a=0;a<timer;a++)for(b=0;b<timer;b++);

 }

void main()

{

unsigned int c;

unsigned int d;

LED=0xfe;  // 11111110

   

while(1)

{

for(c=0;c<8;c++)

{

LED=LED<<1; //向左位移，依次点亮

load(300);

}

for(d=0;d<8;d++)

{

LED=LED>>1; //向右位移

LED = LED|0x80; //依次灭灯

load(300);

}

} 

}