51单片机电子琴C代码

,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,-1},//《洋娃娃和小熊跳舞》

};

uint code tab[]=

{

0,63628,63835,64021,64103,64260,64400,64524,

64580,64684,64777,64820,64898,64968,65030,

65058,65110,65157,65178,65217,65252,65283

};

void delay1(uint ms) //播放歌曲时实现节拍的延时函数

{

uchar t;

while(ms--) for (t=0;t<120;t++);

}

void delay(void)

{

uchar i;

for (i=300;i>0;i--);

}

void EX0_INT() interrupt 0

{

FY=0; LED1=0; LED2=1; STL0=STL0;

}

void EX1_INT() interrupt 2

{

FY=1; LED1=1; LED2=0;LED3=1;LED4=1;LED5=1;P2=0xff; Tone_Index=-1;Tone_Index++;

STH0=(tab[Song[k][Tone_Index]])/256;

STL0=(tab[Song[k][Tone_Index]])%6;

}

void time0_int(void) interrupt 1 using 0

{

TH0 = STH0;

TL0 = STL0;

SPK=!SPK; // 反相，产生输出脉冲

if(FY==0)

{P2=~DSY_CODE[k] ;}

else {if(FY==1) {P2=~GE_CODE[k];}}

}

void main(void)

{ LED1=0;

LED2=1;

LED3=1;LED4=1;LED5=1;

P2=0xff;

IE=0x87;

TMOD=0x01;

IT0=1;

IT1=1;

while(1)

{

if (KeyDown())

{

k = KeyNum(); // 调用键盘扫描函数

if(FY==0)

{

STH0 = tab[k]/256;

STL0 = tab[k]%6;

TR0 = 1; // 开始计数

while (KeyUp()==0); // 若没有松开按键，则等待，等待期间弹奏该音符

TR0 = 0; // 若按键松开，则停止计数，不产生脉冲输出

}

else

{

while (FY==1)

{

if (Song[k][Tone_Index]==-1)

Tone_Index=0;

STH0=(tab[Song[k][Tone_Index]])/256;

STL0=(tab[Song[k][Tone_Index]])%6;

P2=~GE_CODE[Song[k][Tone_Index]] ;

TR0 = 1;

delay1(150*Len[k][Tone_Index]);

Tone_Index++;

TR0 = 0;

}

}

if(k>=1&&(k<=7)){LED3=0;LED4=1;LED5=1;}

else

{if(k>=8&&(k<=14)){LED3=1;LED4=0;LED5=1;}

else

{if (k==0){LED3=1;LED4=1;LED5=1;}

else

{LED3=1;LED4=1;LED5=0;}} }

}

}

}