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標(biāo)題: C51單片機(jī)多聲道播放音樂(lè) [打印本頁(yè)]

作者: dlkfqlxm 時(shí)間: 2021-3-11 13:30
標(biāo)題: C51單片機(jī)多聲道播放音樂(lè)
物理學(xué)中我們知道，頻率增加（或降低）一倍聲音就提高{或降低）8度。
因?yàn)閱纹瑱C(jī)用的是二進(jìn)制，左移或右移就是增減幾倍。所以頻率就同比例增減。
下面以播放《祝你平安》為例：其實(shí)實(shí)現(xiàn)起來(lái)非常簡(jiǎn)單，多一個(gè)聲道就多加一個(gè)蜂鳴器或揚(yáng)聲器。相應(yīng)新加的播放時(shí)左右移就行了。
同樣道理，也能實(shí)現(xiàn)和弦等。具體單片機(jī)代碼如下：
#include "reg52.h"
unsigned char Count;
sbit _Speak =P3^4 ;                      //訊響器控制腳　
usbit _Speakr =P3^7;                      //新加訊響器控制腳
nsigned char code SONG[] ={    //祝你平安
0x26,0x20,0x20,0x20,0x20,0x20,0x26,0x10,0x20,0x10,0x20,0x80,0x26,0x20,0x30,0x20,
0x30,0x20,0x39,0x10,0x30,0x10,0x30,0x80,0x26,0x20,0x20,0x20,0x20,0x20,0x1c,0x20,
0x20,0x80,0x2b,0x20,0x26,0x20,0x20,0x20,0x2b,0x10,0x26,0x10,0x2b,0x80,0x26,0x20,
0x30,0x20,0x30,0x20,0x39,0x10,0x26,0x10,0x26,0x60,0x40,0x10,0x39,0x10,0x26,0x20,
0x30,0x20,0x30,0x20,0x39,0x10,0x26,0x10,0x26,0x80,0x26,0x20,0x2b,0x10,0x2b,0x10,
0x2b,0x20,0x30,0x10,0x39,0x10,0x26,0x10,0x2b,0x10,0x2b,0x20,0x2b,0x40,0x40,0x20,
0x20,0x10,0x20,0x10,0x2b,0x10,0x26,0x30,0x30,0x80,0x18,0x20,0x18,0x20,0x26,0x20,
0x20,0x20,0x20,0x40,0x26,0x20,0x2b,0x20,0x30,0x20,0x30,0x20,0x1c,0x20,0x20,0x20,
0x20,0x80,0x1c,0x20,0x1c,0x20,0x1c,0x20,0x30,0x20,0x30,0x60,0x39,0x10,0x30,0x10,
0x20,0x20,0x2b,0x10,0x26,0x10,0x2b,0x10,0x26,0x10,0x26,0x10,0x2b,0x10,0x2b,0x80,
0x18,0x20,0x18,0x20,0x26,0x20,0x20,0x20,0x20,0x60,0x26,0x10,0x2b,0x20,0x30,0x20,
0x30,0x20,0x1c,0x20,0x20,0x20,0x20,0x80,0x26,0x20,0x30,0x10,0x30,0x10,0x30,0x20,
0x39,0x20,0x26,0x10,0x2b,0x10,0x2b,0x20,0x2b,0x40,0x40,0x10,0x40,0x10,0x20,0x10,
0x20,0x10,0x2b,0x10,0x26,0x30,0x30,0x80,0x00,
                              //路邊的野華不要采
0x30,0x1C,0x10,0x20,0x40,0x1C,0x10,0x18,0x10,0x20,0x10,0x1C,0x10,0x18,0x40,0x1C,
0x20,0x20,0x20,0x1C,0x20,0x18,0x20,0x20,0x80,0xFF,0x20,0x30,0x1C,0x10,0x18,0x20,
0x15,0x20,0x1C,0x20,0x20,0x20,0x26,0x40,0x20,0x20,0x2B,0x20,0x26,0x20,0x20,0x20,
0x30,0x80,0xFF,0x20,0x20,0x1C,0x10,0x18,0x10,0x20,0x20,0x26,0x20,0x2B,0x20,0x30,
0x20,0x2B,0x40,0x20,0x20,0x1C,0x10,0x18,0x10,0x20,0x20,0x26,0x20,0x2B,0x20,0x30,
0x20,0x2B,0x40,0x20,0x30,0x1C,0x10,0x18,0x20,0x15,0x20,0x1C,0x20,0x20,0x20,0x26,
0x40,0x20,0x20,0x2B,0x20,0x26,0x20,0x20,0x20,0x30,0x80,0x20,0x30,0x1C,0x10,0x20,
0x10,0x1C,0x10,0x20,0x20,0x26,0x20,0x2B,0x20,0x30,0x20,0x2B,0x40,0x20,0x15,0x1F,
0x05,0x20,0x10,0x1C,0x10,0x20,0x20,0x26,0x20,0x2B,0x20,0x30,0x20,0x2B,0x40,0x20,
0x30,0x1C,0x10,0x18,0x20,0x15,0x20,0x1C,0x20,0x20,0x20,0x26,0x40,0x20,0x20,0x2B,
0x20,0x26,0x20,0x20,0x20,0x30,0x30,0x20,0x30,0x1C,0x10,0x18,0x40,0x1C,0x20,0x20,
0x20,0x26,0x40,0x13,0x60,0x18,0x20,0x15,0x40,0x13,0x40,0x18,0x80,0x00,

};

void Time0_Init()
{
      TMOD = 0x01;
      IE       = 0x82;
      TH0  = 0xD8;
      TL0  = 0xEF;             //12MZ晶振，10ms
}

void Time0_Int() interrupt 1
{
      TH0 = 0xD8;
      TL0 = 0xEF;
      Count++;                      //長(zhǎng)度加1
}

/*-------------------------------------------------
功能:1MS延時(shí)子程序
-------------------------------------------------*/
void Delay_xMs(unsigned int x)
{
unsigned int i,j;
for( i =0;i < x;i++ )
{
      for( j =0;j<3;j++ );
}
}

/*-------------------------------------------------
功能:歌曲播放子程序i為播放哪一段曲目
-------------------------------------------------*/
void Play_Song(unsigned char i)
{
      unsigned char Temp1,Temp2;
      unsigned int Addr;
      Count = 0;                                              //中斷計(jì)數(shù)器清0
      Addr = i * 217;
      while(1)
      {
            Temp1 = SONG[Addr++];
         if ( Temp1 == 0xFF )       //休止符
         {
                  TR0 = 0;
                  Delay_xMs(100);
         }
         else if ( Temp1 == 0x00 )       //歌曲結(jié)束符
         {
                  return;
         }
         else
         {
                  Temp2 = SONG[Addr++];
                  TR0 = 1;
                        while(1)
                        {
                        _Speak = ~_Speak;
                        Delay_xMs(Temp1);
                        if ( Temp2 == Count )
                        {
                                 Count = 0;
                                 break;

                  }
//以下為新加的聲道播放
      _Speakr = ~_Speakr;//新加的蜂鳴器或揚(yáng)聲器發(fā)聲
                        Delay_xMs(Temp1>>1);//新加的發(fā)音聲道頻率，左移或右移。
                        if ( Temp2 == Count )
                        {
                                 Count = 0;
                                 break;
                        }

         }
      }
}
/*-------------------------------------------------
功能:主程序
-------------------------------------------------*/
void main()
{
      Time0_Init();                      //定時(shí)器0中斷初始化
      while(1)
      {
            Play_Song(0);             //播放
      }
}

作者: Tesla000 時(shí)間: 2021-3-11 15:00
有錄音或者視頻嗎？聽(tīng)聽(tīng)會(huì)出來(lái)怎么樣的聲音

作者: dlkfqlxm 時(shí)間: 2021-3-11 15:46

Tesla000 發(fā)表于 2021-3-11 15:00
有錄音或者視頻嗎？聽(tīng)聽(tīng)會(huì)出來(lái)怎么樣的聲音

我用耳機(jī)試的，就是一面是高音面是低音。高低之間最大我試到左右移功4位。現(xiàn)在眼睛不行了，焊點(diǎn)東西特費(fèi)勁，加個(gè)三極管和蜂鳴器都短路不知多少回。后來(lái)直接在蜂鳴器上取兩個(gè)端點(diǎn)，加上地線，接在耳麥上試聽(tīng)。因?yàn)閮蛇吢曇粲懈哂械停?tīng)以才可行發(fā)表。

歡迎光臨 (http://m.raoushi.com/bbs/)

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