正向,反向,闪烁流水灯

#include "reg52.h" 

void led_delay(void)   
{
  unsigned char i,j;
  for(i=0;i<200;i++)
   for(j=0;j<220;j++)
       ;
}

void forward(void)//正向流水点亮
 {
    P1=0xfe;   //第一个灯亮   
    led_delay();    
    P3=0xfd;    //第二个灯亮
    led_delay();    
    P1=0xfb;       //第三个灯亮
    led_delay();    
    P1=0xf7;       //第四个灯亮
    led_delay();
    P1=0xef;          //第五个灯亮
    led_delay();
    P1=0xdf;          //第六个灯亮
    led_delay();
    P1=0xbf;          //第七个灯亮
    led_delay();
    P1=0x7f;          //第八个灯亮
    led_delay();  
    P1=0xff;
}


void backward(void)//反向流水点亮
  {
    P1=0x7f;          //第八个灯亮
    led_delay();  
    P1=0xbf;       //第七个灯亮
    led_delay();
    P1=0xdf;        //第六个灯亮
    led_delay();
    P1=0xef;         //第五个灯亮
    led_delay();
    P1=0xf7;       //第四个灯亮
    led_delay();
    P1=0xfb;        //第三个灯亮
    led_delay();
    P1=0xfd;      //第二个灯亮
    led_delay();
    P1=0xfe;       //第一个灯亮
    led_delay();
  }

void flash(void)//闪烁点亮
{
  P1=0xff;
  led_delay();
  P1=0x00;
  led_delay();
}

void main(void)
{ 
 while(1)
 {
    forward();
    led_delay();
    backward();
    led_delay();
    flash();
    led_delay();
//    stop();
    led_delay();
    flash();
    led_delay();
 }
}