定时器0方式2 方式3

定时器0方式2

#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit led1=P1;
uint num;
void main()
{
	TMOD=0x02;
	TH0=6;
	TL0=6;
	EA=1;
	ET0=1;
	TR0=1;
	while(1)
	{
		if(num==3686)
		{
			num=0;
			led1=~led1;
		}
	}
}
void T0_timer() interrupt 1
{
	num++;
}

方式3

#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit led1=P1^0;
sbit led2=P1^1;
uint num1,num2;
void main()
{
	TMOD=0x03;
	TH0=6;
	TL0=6;
	EA=1;
	ET0=1;
	ET1=1;
	TR0=1;
	TR1=1;
	while(1)
	{
		if(num1>=3686)//1s时间已到
		{
			num1=0;
			led1=~led1;
		}
		if(num2>=1843)     //半秒时间已到
		{
			num2=0;
			led2=~led2;
		}
	}
}
void TL0_timer() interrupt 1
{
	TL0=6;
	num1++;
}
void TH0_timer() interrupt 3
{
	TH0=6;
	num2++;
}