誰能在我的時鐘程序中加一個鬧鐘程序，不勝感激！

void display(uchar miaog,uchar miaos,uchar feng,uchar fens,uchar shig,uchar shis)//數(shù)碼管動態(tài)顯示
{
    P2=0x7f;
    P0=tab[miaog];
    delay(5);
    P2=0xbf;
    P0=tab[miaos];
    delay(5);
    P2=0xdf;
    P0=0xc0;
    delay(5);
    P2=0xef;
    P0=tab[feng];
    delay(5);
    P2=0xf7;
    P0=tab[fens];
    delay(5);
    P2=0xfb;
    P0=0xc0;
    delay(5);
    P2=0xfd;
    P0=tab[shig];
    delay(5);
    P2=0xfe;
    P0=tab[shis];
    delay(5);
   

}
write_sfm(uchar miao,uchar fen,uchar shi) //寫入到數(shù)碼管
{
uchar miaog,miaos,feng,fens,shig,shis;
miaog=miao%10;
miaos=miao/10;
feng=fen%10;
fens=fen/10;
shig=shi%10;
shis=shi/10;
display(miaog,miaos,feng,fens,shig,shis);
}
void didi()
{
   

         buzzer=0;
         delay(50);
         buzzer=1;

}
void keyscan()
{
    uchar temp;
    if(key1==0)  //功能鍵
        {
        if(key1==0)
        {
            while(!key1);
            key1n=key1n++;
            if(key1n==5)
                key1n=1;
            switch(key1n)
            {
            case 1:didi();
                temp=(miao)/10*16+(miao)%10;//將秒轉(zhuǎn)化成bcd碼，沒這句秒就變化，不知為什么
                write_1302 (0x8e,0x00);  //禁止寫保護(hù)   
                write_1302 (0x80,0x80|temp); //時鐘暫停   
                write_1302 (0x8e,0x80);  //允許寫保護(hù)
                break;
            case 2 :didi();
                    break;
            case 3 :didi();
                    break;
            case 4  :didi();
                temp=miao/10*16+miao%10;   
                write_1302 (0x8e,0x00);  //禁止寫保護(hù)
               write_1302 (0x80,0x00|temp);//時鐘開始
                write_1302 (0x8e,0x80);  //允許寫保護(hù)
                break;
       
            }
        }
       
}

    if(key1n!=0)    //當(dāng)按下功能鍵后，才執(zhí)行以下加減鍵
       {
       if(key2==0)    //加鍵
           {
          delay(3);
         if(key2==0) 
            {
            while(!key2);
            switch(key1n)
            {
        case 1  :  didi();                                //秒
               
                temp=(miao+1)/10*16+(miao+1)%10;
                if(miao==59)
                    temp=0;
                write_1302 (0x8e,0x00);  //禁止寫保護(hù)
               write_1302 (0x80,0x80|temp);
                write_1302 (0x8e,0x80);  //允許寫保護(hù)
                break;
           
        case 2  :  didi();                              //分
                temp=(fen+1)/10*16+(fen+1)%10;
                if(fen==59)
                    temp=0;   
                write_1302 (0x8e,0x00);  //禁止寫保護(hù)
               write_1302 (0x82,temp);
                write_1302 (0x8e,0x80);  //允許寫保護(hù)
                break;
        case 3  :    didi();
                temp=(shi+1)/10*16+(shi+1)%10;    //時
                if(shi==23)
                    temp=0;
                write_1302 (0x8e,0x00);  //禁止寫保護(hù)
               write_1302 (0x84,temp);
                write_1302 (0x8e,0x80);  //允許寫保護(hù)
                break;
   
       
            }
            }
        }
            if(key3==0)    //減鍵
                {
            delay(3);
        if(key3==0) 
            {
            while(!key3);
            switch(key1n)
            {
        case 1  :didi();
               
                temp=(miao-1)/10*16+(miao-1)%10;    //秒
                if(miao==0)
                    temp=89;
                write_1302 (0x8e,0x00);  //禁止寫保護(hù)
               write_1302 (0x80,0x80|temp);
                write_1302 (0x8e,0x80);  //允許寫保護(hù)
                break;
           
        case 2  :didi();
                temp=(fen-1)/10*16+(fen-1)%10;        //分
                if(fen==0)
                    temp=89;   
                write_1302 (0x8e,0x00);  //禁止寫保護(hù)
               write_1302 (0x82,temp);
                write_1302 (0x8e,0x80);  //允許寫保護(hù)
                break;
        case 3  :didi();
                temp=(shi-1)/10*16+(shi-1)%10;       //時
                if(shi==0)
                    temp=35;
                write_1302 (0x8e,0x00);  //禁止寫保護(hù)
               write_1302 (0x84,temp);
                write_1302 (0x8e,0x80);  //允許寫保護(hù)
                break;
   
       
            }
            }
        }   
    }
          //write_1302(0x80,miao|0x80);
         //miao++;
           
    /*    if(key2==0)
        {
            if(key2==0)
            {
            while(!key2);
            write_1302(0x80,miao|0x00);//打開1302振蕩器
            }

        }
    */       
}
void main()
{
    init();
    //buzzer=0;
    //miao=20;
    //fen=10;
    //shi=23;
    while(1)
    {
   
    miao = BCD_Decimal(read_1302(0x81));
    fen = BCD_Decimal(read_1302(0x83));
    shi  = BCD_Decimal(read_1302(0x85));
    keyscan();
    }
}
void tiemr0() interrupt 1
{
    TH0=(65536-50000)/256;
    TL0=(65536-50000)%256;
    write_sfm(miao,fen,shi);
}