/********************************************************************
* 文件名  ： 蜂鳴器唱歌.c
* 描述    :  該程序實現控制蜂鳴器演奏音樂。				 
* 創建人  ： 東流，2009年4月9日
* 版本號  ： 2.0
***********************************************************************/
#include<reg52.h>
#define uchar unsigned char
#define uint  unsigned int
uchar Count;

sbit Speak =P1^2;				  //蜂鳴器器控制腳 　
/*以下數組是音符編碼*/
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,

};

/********************************************************************
* 名稱 : Time0_Init()
* 功能 : 定時器的初始化，定時時間可用光碟中軟件計算，11.0592MZ晶振，10ms
* 輸入 : 無
* 輸出 : 無
***********************************************************************/
void Time0_Init()
{
	TMOD = 0x01;
	IE 	 = 0x82;
	TH0  = 0xDC;
	TL0  = 0x00;		
}

/********************************************************************
* 名稱 : Time0_Int()
* 功能 : 定時器中斷，中斷中實現 Count 加一
* 輸入 : 無
* 輸出 : 無
***********************************************************************/
void Time0_Int() interrupt 1
{
	TH0 = 0xDC;
	TL0 = 0x00;
	Count++;			//長度加1
}

/********************************************************************
* 名稱 : Delay_xMs()
* 功能 : 延時子程序，經過軟件調試，測得延時程序大概為55us.
* 輸入 : x 
* 輸出 : 無
***********************************************************************/
void Delay_xMs(uint x)
{
    uint i,j;
    for(i=0; i<x; i++)
    {
        for(j=0; j<3; j++);
    }
}

/********************************************************************
* 名稱 : Play_Song()
* 功能 : 播放蜂鳴器控制程序
* 輸入 : i (選擇播放哪首歌曲，0為“祝你平安”，1為“路邊的野花你不要采”
* 輸出 : 無
***********************************************************************/
void Play_Song(uchar i)
{
	uchar Temp1,Temp2;
	uint Addr;
	Count = 0;						//中斷計數器清0
	Addr = i * 217;
	while(1)
	{
		Temp1 = SONG[Addr++];
	    if (Temp1 == 0xFF)          //休止符
	    {
	    	TR0 = 0;
	    	Delay_xMs(100);
	    }
	    else if (Temp1 == 0x00)	  //歌曲結束符
	    {
	    	return;
	    }
	    else
	    {
	    	Temp2 = SONG[Addr++];
	    	TR0 = 1;
	  		while(1)
	  		{
	    		Speak = ~Speak;
	    		Delay_xMs(Temp1);
	    		if(Temp2 == Count)
	    		{
	    			Count = 0;
	    			break;
	    		}
	    	}
	    }
	}
}
/********************************************************************
* 名稱 : Main()
* 功能 : 主函數
* 輸入 : 無
* 輸出 : 無
***********************************************************************/
void Main()
{
	Time0_Init();			//定時器0中斷初始化
	while(1)
	{
		Play_Song(0);		//Play_Song(0)為祝你平安    Play_Song(1)為路邊的野花你不要裁
	}
}