LED闪烁

delay函数

延时函数

void delay(unsigned int i)//大约延时10us
{while(i--);	
}

实验代码

#include "reg52.h"
typedef unsigned char u8;
typedef unsigned int u16;void delay(u16 i)
{while(i--);
}
sbit led=P2^0;void main(){while(1){led=0;delay(10000);led=1;delay(10000);}
}