...int aa,cp1;
uint temp_num,temp_num1,temp_dot,temp;
sbit P1_0=P1^0;
void timer0_isr()interrupt 1 //中断服务函数
{
TH0 = (65536-2000)/256; //TH0重置函数
TL0 = (65536-2000)%256; //TL0重置函数
cp1++;
if(cp1>=500) //1秒
{
cp1 = ...