1.思路：

        1.1给定时器TMOD 初值

                给初值定一个10ms

                TR0 =1 开始计时 ；TF0 = 0 计算爆表

                ET0 = 1 打开定时器0中断 ； EA = 1 打开总中断EA

        1.2.main()函数里面的软件定时消掉，用定时器定时 ；定义一个中断函数，写入爆表100次，led翻转

#include "reg52.h"
#include <intrins.h>

sbit led  = P3^6;
sbit led1 = P3^7;
int cnt = 0;

void Time0Init()
{
		
	TMOD = 0x01;

	
	TL0 = 0x00;
	TH0 = 0xDC;
			
	TR0 = 1; 
	TF0 = 0; 
	
	
	ET0 = 1;
	
	EA = 1;
}

void Delay500ms()		//@11.0592MHz
{
	unsigned char i, j, k;

	_nop_();
	i = 4;
	j = 129;
	k = 119;
	do
	{
		do
		{
			while (--k);
		} while (--j);
	} while (--i);
}


void main()
{
	led = 1;
	
	Time0Init();
	while(1)
	{
			led1 = 0;
			Delay500ms();
			led1 = 1;
			Delay500ms();
	}
}


void Time0Handler() interrupt 1
{
	
					cnt++;  
					TL0 = 0x00;
					TH0 = 0xDC;
				if(cnt == 100){ 
							cnt = 0; 
							led = !led; 
					}
}