STC89C52单片机蜂鸣器唱歌实验

 实现功能：通过对单片机定时器的配置，让其产生不同频率的方波，蜂鸣器根据频
      率的不同而发出不同的声音，来达到唱歌的目的
 实验板型号：KBL-XYD-C52
 实验名称：  蜂鸣器唱歌实验
 编写人：  谢应东
 编写日期：  2012-4-26     
////////////////////////////////////////////////////////////////////////
#include

#define uchar unsigned char
#define uint  unsigned int

uchar cCount;

sbit FMQ =P2^4;      //定义实验板上蜂鸣器器控制脚

unsigned 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,
                                  //路边的野华不要采
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,

};
////////////////////////////////////////////////////////////////////////
函数名称：Time0_Init
函数功能：定时器的初始化配置，使其能中断，中断的时间间隔为10ms
参数介绍：无
返回值：  无
注意事项：注意此时实验板上用到的晶振为11.0592M的，要选用其他的，得重新配置
////////////////////////////////////////////////////////////////////////
void Init_Time0()
{
 TMOD = 0x01; //设置定时器0为模式1(16bit)

 TH0  = 0xDC; //给定时器0高八位赋初值
 TL0  = 0x00; //给定时器0第八位赋初值

 ET0  = 1;  //允许定时器0中断
 EA   = 1;  //打开全局中断 
}
////////////////////////////////////////////////////////////////////////
函数名称：Time0_Routine
函数功能：定时器0中断服务函数，重新给定时器0赋值，同时把全局变量cCount加1
参数介绍：无
返回值：  无
注意事项：无
////////////////////////////////////////////////////////////////////////
void Time0_Routine() interrupt 1 using 1
{
 TH0 = 0xDC;   //重新给高八位赋新值
 TL0 = 0x00;   //重新给第八位赋新值
 cCount++;   //计数变量加1
}
////////////////////////////////////////////////////////////////////////
函数名称：DelayUs
函数功能：延时函数，通过示波器测试，此函数每执行一次大概能延时55us
参数介绍：iDelay_Us：执行此延时函数的次数
    iNumber1：第一个for语句所用的记录循环的变量
    iNumber2：第二个for语句所用的记录循环的变量 
返回值：  无
注意事项：无
////////////////////////////////////////////////////////////////////////
void DelayUs(unsigned int iDelay_Us)
{
    uint iNumber1,iNumber2;
    for(iNumber1=0;iNumber1     {
        for(iNumber2=0;iNumber2<3;iNumber2++);
    }
}
////////////////////////////////////////////////////////////////////////
函数名称：FMQ_PlaySong
函数功能：控制实验板上与蜂鸣器相连的引脚输出不同的频率的方波，依次来控制蜂鸣
    器唱歌
参数介绍：cNumber：歌曲的选择，'0'代表“祝你平安”，‘1’代表“路边的野花不要采”
返回值：  无
注意事项：无
////////////////////////////////////////////////////////////////////////
void FMQ_PlaySong(unsigned char cNumber)
{
 uchar cTemp1,cTemp2;
 uint iAddr;
 cCount = 0;      //中断计数器清0
 iAddr = cNumber * 217;   //歌曲的地址，可以参看SONG[]，你就会明白
 while(1)
 {         //把音码变量数组里的值赋给临时变量
  cTemp1 = SONG[iAddr++];
     if (cTemp1 == 0xFF)          //休止符
     {
      TR0 = 0;
      DelayUs(100);    //延时
     }
     else if (cTemp1 == 0x00)   //判断是否歌曲结束
     {
      return;
     }
     else
     {
      cTemp2 = SONG[iAddr++];//判断完，不是休止符与结束符后，让蜂鸣器唱歌
      TR0 = 1;      //让定时器0开始工作
     while(1)
     {
       FMQ = ~FMQ;     //让蜂鸣器不停地在开与关之间切换
       DelayUs(cTemp1);
       if(cTemp2 == cCount)
       {
        cCount = 0;
        break;
       }
      }
     }
 }
}
////////////////////////////////////////////////////////////////////////
函数名称：main
函数功能：完成系统的初始化，让实验板上的蜂鸣器不停循环的唱上面的两首歌
参数介绍：无
返回值：  无
注意事项：无
////////////////////////////////////////////////////////////////////////
void main()
{ 
 DelayUs(100);   //稳定系统
 Init_Time0(); //定时器0中断初始化
 while(1)
 {
  FMQ_PlaySong(0); //播放“祝你平安”
  DelayUs(100);    //延时一下，以便播放下一首歌
  FMQ_PlaySong(1); //播放“祝你平安”
  DelayUs(100);    //延时一下，以便播放下一首歌
 }
}