sbit  sound=P2^4;

sbit  led1=P1^6;

sbit  led2=P1^7;

unsigned char h,l,count,length;

unsigned int t,f,i,j;

unsigned int  scale[22]={100,262,294,330,349,392,440,494,523,578,659,698,784,880,988,1046,1175,1318,1397,1568,1760,1976};

bit flag=1;

void setthl(unsigned int p)

{

t=p*2;

f=1000000/t;

h=(65536-f)/256;

l=(65536-f)%256;

TH1=h;

TL1=l;

flag=1;

TR1=1;

}

time1() interrupt 3 using 1

  {

    TH1=h;

    TL1=l;

    sound=~sound;

   }

  

void timer0(void) interrupt 1

{

 TH0=0x9c;   

 TL0=0x60;

 count++;

 if (count==length)

 {

      flag=0;

      count=0;

 }

}

 

delay()

{

   length=10;

   flag=1;

   TR1=0;

   while(flag);

   TR1=1;

 }

 

note(unsigned char n,unsigned char len)

{

   setthl(scale[n]);

   length=len;

   while (flag);

   led1=!led1;

   led2=!led2;

 

}

 

song()

{

   note(5,15);

   note(12,15);

   note(11,15);

   note(10,30);

   note(10,15);note(11,8);note(10,38);

  

   note(10,15);note(11,15);note(10,15);note(11,15);note(10,15);note(9,8);

   note(8,8); delay(); 

  

   note(8,15);note(10,15);note(12,15);note(13,30);note(13,15);note(13,8);note(12,23);note(9,15);note(9,15);note(11,8);note(10,38);

   delay();

   note(8,15);note(10,15);note(12,15);note(13,30);note(13,15);note(13,8);note(12,23);note(9,15);

   note(9,15);note(11,15);note(10,15);note(11,15);note(10,15);note(9,8);note(8,38);  

   note(9,15);note(9,8);note(10,7);note(6,30);note(6,15);note(8,15);note(8,15);note(7,15);note(7,30);note(8,30);(8,30);

}

Delay(int i)

  { int j;

   for(;i>0;i--)

   {

     for(j=i;j>0;j--);

    }

  }

main()

{while(1)

{count=0,length=0;

TMOD=0x11;

TH0=0x3c;

TL0=0xb0;

EA=1;

ET1=1;

ET0=1;

TR1=1;

TR0=1;

    led1=!led1;  

   song();

   sound=1;

   EA=0;   

   Delay(500);

    }

 

}