大家可以幫忙看一下一下代碼嗎？ 我已經看了將近一周了但達不到我的目的，每個獨立鍵盤控制不同頻率的聲音，求各位大師幫忙啊!

#include <reg52.h>
unsigned char i,j,key;
#define uint unsigned int
#define uchar unsigned char
uchar table[]={63343,640,63330};
uchar hz;
sbit key1=P3^2;
sbit key2=P3^3;
sbit key3=P1^0;
sbit key4=P1^1;
sbit fenmingqi=P3^4;
void delay(uint x);
void program(uchar key);
void init();
void main(void)
{
 init();
 
  if(key1==0)
       {
       hz=table[0];
       program(key1);
       }
     if(key2==0)
       {
       hz=table[1];
       program(key2);
       }
     
      
      
}

void t0(void) interrupt 1 using 0
{
 TH0=(65536-hz)/256;
 TL0=(65536-hz)%256;
 fenmingqi=~fenmingqi;
}
void program(uchar key)
{ 
  
    TH0=(65536-hz)/256;
 TL0=(65536-hz)%256;
 if (key==0)           
  {
        delay(2);
        if(key==0)                 
  TR0=1;
        }
   while(key1==0)
         fenmingqi=1;
         TR0=1;
  
}
void init()
{
 TMOD=0x01;
 ET0=1;
 EA=1;
}
void delay(uint x)
{
 uint y,i;
 for (y=0;y<x;y++)
    for(i=0;i<3;i++);
}