簡易電子琴程序

ID:71870 · 發表于 2015-1-18 08:28

#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
sbit BEEP=P3^6 ;
//sbit duan=P3^3 ;
uint j=0,flag=0;
uint tab1[]={  0x48,  //"0"
            0x7E,  //"1"
            0xC4,  //"2"
            0x54,  //"3"
            0x72,  //"4"
            0x51,  //"5"
            0x41,  //"6"
            0x7C,  //"7"
            0x40,  //"8"
   };
uint tab2[] = { 64021,64103,64260,64400,64524,64580,64684,64777,
      64820,64898,64968,65030,65058,65110,65157,65178};
void display(j)
{
//duan=0;
P1=tab1[j];
//duan=1;
}
void Timer0_Play_Music() interrupt 1
{
  TH0 = tab2[ j ] / 256;
  TL0 = tab2[ j ] % 256;
  BEEP = ~BEEP;
flag++;
if(flag==2)
  {flag=0;
BEEP=0;
TR0=0;}

}
void T1_timer() interrupt 3
{ uint z;
      TH0 = (65536 - 50000)/256;
      TL0 = (65536 - 50000)%256;
   z++;
      if( z== 20)
   {
         z = 0;
         j++;
display(j);
TR0=1;
TR1=0;
if(j==7)
{ TR1=0;
   j=0;}
      }
}
void keyscan()
{
uint k=P2;
  switch (k)
  {
case 0xfe:j=1;TR0=1;display(j);break;
case 0xfd:j=2;TR0=1;display(j);break;
case 0xfb:j=3;TR0=1;display(j);break;
case 0xf7:j=4;TR0=1;display(j);break;
case 0xef:j=5;TR0=1;display(j);break;
case 0xdf:j=6;TR0=1;display(j);break;
case 0xbf:;j=7;TR0=1;display(j);break;
case 0x7f:TR1=1;j=0;break;
   default : break;
  }
}
void main()
{ BEEP=0;
TMOD=0x11;
EA=1;
ET0=1;
ET1=1;
TH0 = tab2[ j ] / 256;
TL0 = tab2[ j ] % 256;
TH1 = (65536 - 50000)/256;
  TL1 = (65536 - 50000)%256;
// P1=0x00;
while(1)
{
keyscan();
}

}