flashled.c.bak

一个单片机程序

#include <reg52.h>

#define BYTE unsigned char
#define WORD unsigned int

sbit LED1=P1^0;
sbit LED2=P1^1;
sbit LED3=P1^2;
sbit LED4=P1^3;
sbit LED5=P1^4;
sbit LED6=P1^5;
sbit LED7=P1^6;
sbit LED8=P1^7;

sbit DLEDcs1=P2^1;
sbit DLEDcs2=P2^0;
sbit DLEDcs3=P2^2;
sbit DLEDcs4=P2^3;

void Delay()
{
	WORD i;
	i=0x4000;
	while(i--);
}

main()
{
	BYTE i,j,x,y;
	//关闭数码管显示
	DLEDcs1=DLEDcs2=DLEDcs3=DLEDcs4=0;	
	
	//流水灯实验
	while(1)
	{
		Delay();P1=0xff;//熄掉所有灯
		//单灯流水
		x=1;
		for(i=0;i<8;i++)
		{
			Delay();
			P1=x^0xff;
			x*=2;//if(x==0) x=1;
		}
		Delay();P1=0xff;//熄掉所有灯
		//双灯流水
		x=3;
		for(i=0;i<7;i++)
		{
			Delay();
			P1=x^0xff;
			x*=2;//if(x==0) x=1;
		}
		Delay();P1=0xff;//熄掉所有灯
		//交替显示1
		for(i=0;i<4;i++)
		{
			Delay();
			P1=0x55;
			Delay();
			P1=0xaa;			
		}
		Delay();P1=0xff;//熄掉所有灯
		//交替显示2
		for(i=0;i<4;i++)
		{
			Delay();
			P1=0x33;
			Delay();
			P1=0xcc;			
		}
		Delay();P1=0xff;//熄掉所有灯
		//另一个花样
		for(i=0;i<8;i++)
		{
			y=P1;x=1;
			for(j=0;j<8-i;j++)
			{
				Delay();
				P1=y&(x^0xff);
				x*=2;
			}
		}		
		while(1);
	}	
}