我是单片机新手,写了一段LED灯代码,但是我想让灯(P1口)循环两次就终止程序,我该怎么做?
附代码:
#include<reg52.h>
void yanshi (unsigned int a ); //声明延时函数
void main() //主函数
{
while(1)
{
P1=0X7F;
yanshi(50000);
P1=0XBF;
yanshi(50000);
P1=0XDF;
yanshi(50000);
P1=0XEF;
yanshi(50000);
P1=0XF7;
yanshi(50000);
P1=0XFB;
yanshi(50000);
P1=0XFF;
yanshi(50000);
}
}
void yanshi (unsigned int a ) //延时函数
{
while(a--) ;
}
悬赏分数给回答的最仔细的!