流水灯.c

该程序可以测试单片机是否工作正常

#include<reg52.h>
sbit P00=P0^0;
sbit P01=P0^1;
sbit P02=P0^2;
sbit P03=P0^3;
sbit P04=P0^4;
sbit P05=P0^5;
sbit P06=P0^6;
sbit P07=P0^7;
void delay(int n)
{	int i,t;
	for(i=0;i<=n;i++)
		for(t=0;t<=n;t++);
}
void main(void)
{	
	int j;
	P0=0x00;
	P0=0x01;
	while(1)
	{
		for(j=0;j<=6;j++)
		{
			P0=P0<<1;
			delay(100);
		}
		for(j=0;j<=6;j++)
		{
			P0=P0>>1;
			delay(100);
		}
	}
}