//流水灯
#include "reg52.h"
#define LED_PORT P3
void delay(unsigned char time)
{
unsigned char i,j,k;
for(i=0;i<time;i++)
{
for(j=0;j<200;j++)
{
for(k=0;k<200;k++);
}
}
}
void main()
{
unsigned char i,halfbyteh=0x80,halfbytel=0x01;
while(1)
{
halfbyteh=0x80;
halfbytel=0x01;
for(i=0;i<8;i++)
{
//LED_PORT=halfbyteh|halfbytel;//高电平点亮
LED_PORT=~(halfbyteh|halfbytel);//低电平点亮
halfbyteh=halfbyteh>>1;
halfbytel=halfbytel<<1;
delay(10);
}
}
}