定时器0方式2

#include<reg52.h>

}

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++;
}