#include
#define uint unsigned int
sbit bb=P3^5;
sbit led1=P0^0;
unsigned int i=0;
void delay(uint z);
void main()
{
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%6;
EA=1;
ET0=1;
TR0=1;
while(1)
{
if(i==20)
{
i=0;
led1=0;
bb=0;
delay(500);
led1=1;
bb=1;
delay(500);
}
}
}
void exter0() interrupt 1
{
TH0=(65536-50000)/256; //中止函数中也需求赋定时器初值
TL0=(65536-50000)%6;
i++;
}
void delay(uint z) //推迟函数
{
uint x,y;
for(x=z;x>0;x–)
for(y=20;y>0;y–);
}
