如何利用51单片机的t0,t1定时器测出赫兹，并输出到数码管？

#include
#define uchar unsigned char;
uchar distab[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x00};  //0到f
uchar number,cnt=0;
int dat,dis=0;
void t0isr() interrupt 1
{
	TH0=(65536-5000)/256;
	TL0=(65536-5000)%256;
	cnt++;
	if(cnt>=200)
	{
	cnt=0;
	dat=dis;
	dis=0;
	}	
	number++;
	number%=4;
	switch(number)
	{
	case 0:P2=0x08;P0=distab[dat/1000];
		break;
	case 1:P2=0x04;P0=distab[(dat%1000)/100];
		break;
	case 2:P2=0x02;P0=distab[(dat%100)/10];
		break;
	case 3:P2=0x01;P0=distab[dat%10];
		break;
	default:break;
	}
}
void t1isr() interrupt 3
{
	dis++;
}
main()
{
		TMOD=0x51;
		TH0=(65536-5000)/256;
		TL0=(65536-5000)%256;
		TH1=0xff;
		TL1=0xff;
		TR1=1;
		ET1=1;
		TR0=1;
		ET0=1;
		EA=1;
		while(1);
}