应该是代表时间长短吧

请问一下楼主,你的这个程序确定没有问题吗?

我从网上找的，看这个结构比较简单，我试过，没问题。。

#include <reg52.h>
unsigned char Count;
sbit _Speak =P3^7 ;                        //讯响器控制脚　
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：Time0_Init()
** 描述：定时器0赋初值,晶振为12M,定时10ms
*******************************************************************************/
void Time0_Init()     
{
        TMOD = 0x01;   //定义为16位计数器
        IE   = 0x82;   //0x82 转化为二进制时为1000 0010 ,意思为开总中断,开定时器0中断.
        TH0  = 0xD8;    //高四位赋初值   也可写为TH0=(65536-10000)/256
        TL0  = 0xEF;    // 低四位赋初值  也可写为TL0=(65536-10000)%256      
}
/*******************************************************************************
** 函数：Time0_Int() interrupt 1
** 描述：定时器0中断
*******************************************************************************/
void Time0_Int() interrupt 1   
{
        TH0=0xD8;     //重赋初值
        TL0=0xEF;    //重赋初值
        Count++;         //长度加1
}
/*******************************************************************************
** 函数：Delay_xMs(unsigned int x)
** 描述：  50us
*******************************************************************************/
void Delay_xMs(unsigned int x)
{
        unsigned int i,j;
        for(i=0;i<x;i++)
        {
                for(j=0;j<3;j++);
        }
}
/*******************************************************************************
** 函数：Play_Song
** 描述：歌曲播放子程序i为播放哪一段曲目
*******************************************************************************/
void Play_Song(unsigned char i)
{
        unsigned char Temp1,Temp2;   //Temp1(频率)调用数组内的单数,Temp2(拍子)调用数组里的偶数,
        unsigned int Addr;
        Count=0;      //中断计数器清0   过10ms自加一次.
        Addr=i*217;   //如果i为0,计算从0开始,如果i为1,计算从217开始,也就是第二首歌的起始地址.
        while(1)
        {
                Temp1=SONG[Addr++];      
                if(Temp1==0xFF)          //休止符
                {
                        TR0=0;   //关闭TO.
                        Delay_xMs(100);
                }
                else if (Temp1==0x00)          //歌曲结束符
                {
                        Addr++;
                        i++;
                        if(i==2)
                        {
                                i=0;
                                return;    //返回
                        }
                }
                else
                {
                        Temp2=SONG[Addr++];
                        TR0=1;   //开定时器T0
                        while(1)
                        {
                                _Speak = ~_Speak;
                                Delay_xMs(Temp1);
                                if (Temp2== Count)
                                {
                                        Count = 0;
                                        break;    //跳出while(1)循环
                                }
                        }
                }
        }
}
/*******************************************************************************
** 函数：main()
** 描述：
*******************************************************************************/
void main()
{
        Time0_Init();                        //定时器0中断初始化
        while(1)
        {
                Play_Song(0);
        }
}  






这是我对你的程序的一些注释,希望能对你有所帮助.  
可能也有很多不足之处,希望大家多多指正.

else  
{  
Temp2=SONG[Addr++];  
TR0=1;   //开定时器T0
while(1)  
{  
_Speak = ~_Speak;  
Delay_xMs(Temp1);  
if (Temp2== Count)  
{  
Count = 0;  
break;    //跳出while(1)循环
}  
}  
}  
这一段注释的不是太清楚，麻烦楼上再解释下好吗？