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標題: 本人剛學單片機不久，分享下天空之城的電子琴源程序，希望能幫到更多的初學者朋友 [打印本頁]

作者: xiaozhiTZM 時間: 2019-3-8 11:01
標題: 本人剛學單片機不久，分享下天空之城的電子琴源程序，希望能幫到更多的初學者朋友
#include <REG52.H>
#include <INTRINS.H>
//頻率常數即音樂術語中的音調,而節拍常數即音樂術語中的多少拍;
//所以拿出譜子, 試探編吧!
sbit Beep =  P1^5;

unsigned char n=0;  //n為節拍常數變量
unsigned char code music_tab[] ={
0x1c, 0x30, 0x19, 0x30, 0x18, 0x40, 0x19, 0x30,
0x18, 0x30, 0x13, 0x30, 0x19, 0x18, 0x26, 0x30,
0x26, 0x30, 0x1c, 0x40, 0x20, 0x30, 0x1c, 0x30,
0x18, 0x30, 0x20, 0x60, 0x26, 0x30, 0x26, 0x30,
0x24, 0x40, 0x26, 0x30, 0x24, 0x30, 0x18, 0x40,
0x26, 0x60, 0x18, 0x20, 0x18, 0x20, 0x18, 0x20,
0x19, 0x40, 0x24, 0x30, 0x24, 0x30, 0x19, 0x30,
0x19, 0x60, 0x1c, 0x30, 0x19, 0x30, 0x18, 0x40,
0x19, 0x30, 0x18, 0x30, 0x13, 0x30, 0x19, 0x60,
0x26, 0x30, 0x26, 0x30, 0x1c, 0x40, 0x20, 0x30,
0x1c, 0x30, 0x18, 0x30, 0x20, 0x80, 0x26, 0x30,
0x24, 0x30, 0x24, 0x30, 0x18, 0x30, 0x19, 0x20,
0x19, 0x30, 0x18, 0x30, 0x15, 0x20, 0x15, 0x20,
0x13, 0x20, 0x18, 0x40, 0x18, 0x30, 0x19, 0x30,
0x1c, 0x20, 0x1c, 0x20, 0x19, 0x30, 0x20, 0x30,
0x1c, 0x60, 0x18, 0x30, 0x15, 0x30, 0x13, 0x40,
0x15, 0x30, 0x13, 0x30, 0x10, 0x30, 0x15, 0x60,
0x20, 0x30, 0x20, 0x30, 0x18, 0x30, 0x19, 0x30,
0x18, 0x30, 0x13, 0x30, 0x13, 0x60, 0x1c, 0x20,
0x19, 0x20, 0x18, 0x30, 0x19, 0x30, 0x15, 0x20,
0x15, 0x20, 0x18, 0x40, 0x20, 0x30, 0x20, 0x30,
0x12, 0x30, 0x13, 0x30, 0x15, 0x30, 0x18, 0x30,
0x13, 0xc0, 0x13, 0x80, 0x13, 0x30, 0x0e, 0x80,
0x10, 0x30, 0x10, 0x30, 0x13, 0x20, 0x15, 0x20,
0x18, 0x40, 0x18, 0x30, 0x15, 0x30, 0x18, 0x20,
0x15, 0x20, 0x15, 0x30, 0x10, 0x30, 0x13, 0x60,
0x13, 0x30, 0x0e, 0x60, 0x10, 0x60, 0x13, 0x20,
0x15, 0x20, 0x18, 0x40, 0x18, 0x30, 0x15, 0x30,
0x15, 0x20, 0x18, 0x20, 0x15, 0x30, 0x19, 0x30,
0x1c, 0x60, 0x1c, 0x30, 0x19, 0x30, 0x1c, 0xc0,
0x00,
};

void int0()  interrupt 1 //采用中斷0 控制節拍
{  TH0=0xd8;
TL0=0xef;
n--;
}

void delay (unsigned char m) //控制頻率延時
{
unsigned i=3*m;
while(--i);
}

void delayms(unsigned char a)  //豪秒延時子程序
{
  while(--a);                //采用while(--a) 不要采用while(a--); 各位可編譯一下看看匯編結果就知道了!
}

void main()
{ unsigned char p,m; //m為頻率常數變量
  unsigned char i=0;
  TMOD&=0x0f;
  TMOD|=0x01;
  TH0=0xd8;TL0=0xef;
  IE=0x82;
play:
while(1)
{
a: p=music_tab[i];
   if(p==0x00)    { i=0, delayms(1000); goto play;}    //如果碰到結束符,延時1秒,回到開始再來一遍
   else if(p==0xff)  { i=i+1;delayms(100),TR0=0; goto a;}  //若碰到休止符,延時100ms,繼續取下一音符
         else       {m=music_tab[i++], n=music_tab[i++];}  //取頻率常數和節拍常數
         TR0=1;                                           //開定時器1
         while(n!=0) Beep=~Beep,delay(m);                      //等待節拍完成, 通過P1口輸出音頻(可多聲道哦!)
   TR0=0;                                           //關定時器1
}
}

電子琴-天空之城 .rar

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