exam21.c

基于周立功实验箱设计的键盘控制走马灯方向的源码

#include<reg51.h>

sbit P1_0=P1^0;
sbit P1_1=P1^1;
sbit P1_2=P1^2;

void main(void)
{
	int i=0,x,y;
	TMOD=0x10;
	TR1=1;
	do{
		x=59965+i;
		y=59965-i;
		TH1=x/256;
		TL1=x%256;
		while(!TF1);
		TF1=0;
		P1_0=!P1_0;
		TH1=y/256;
		TL1=y%256;
		while(!TF1);
		TF1=0;
		P1_0=!P1_0;
		if(P1_1)
			i+=10;
		if(P1_2)
			i-=10;
	}while(1);
}