(89C51)定时器计时1s

unsigned char count=0;
void initT1()
{
    EA=1;
    TH1=0xDC;
    TL1=0X00;
    TMOD=0x10;
    TR1=1;
    ET1=1;
}

void t1() interrupt 3
{
    TH1=0xDC;
    TL1=0X00;
    count++;
    if(count>=100)
    {
        count=0;
        //function()
    }
}

void main()
{
        initT1();
}