3.c

C51 程序练习

//8个发光管来回流动，第个管亮100ms,流动时让蜂鸣器发出“滴滴”?
#include<reg52.h>
#include<intrins.h>
#define uint unsigned int
#define uchar unsigned char
sbit BEEP=P1^5;
uchar temp;

void delay(uint z)
{
	uint x,y;
	for(x=z;x>0;x--)
		for(y=110;y>0;y--);
}
void main()
{
	uchar i,j;
	while(1)
	{
		temp=0xfe;
		P2=temp;
		for(i=0;i<7;i++)
		{
			temp=_crol_(temp,1);
			delay(1000);
			P2=temp;	
			BEEP=0;
			delay(250);
			BEEP=1;
			delay(250);
			BEEP=0;
			delay(250);
			BEEP=1;
			delay(250);

	
		}
		temp=0x7f;
		P2=temp;
		for(j=0;j<7;j++)
		{
			temp=_cror_(temp,1);
			delay(1000);
			P2=temp;	
			BEEP=0;
			delay(250);
			BEEP=1;
			delay(250);
			BEEP=0;
			delay(250);
			BEEP=1;
			delay(250);

	
		}
	}
}