利用定时器T0的工作方式1实现1秒钟延时程序(单片机)

Question

如题所述

Answer 1

#include <reg51.h>
#define uchar unsigned char
sbit LED=P1^0;
uchar time;

void initT0( )
{
TMOD = 0x01; //定时器0，工作方式1
TH0 = (65536-50000)/256;
TL0 = (65536-50000)%256; //50ms中断一次
EA = 1;
ET0 = 1;
TR0 = 1;
}

void main(void)
{
initT0();
while(1)
if(time==20) //中断20次，1s
{
time=0;
LED=！LED; //P1.0上的LED，1s亮或灭一次
}
}

void T0int( ) interrupt 1
{
TH0 = (65536-65536)/256;
TL0 = (65536-65536)%256;
time++;
}