/* ***************************************************** */

#include

void delay(unsigned char n);     //函数delay()存在 文件delay.c

                                   中

code unsigned song[]={

0x82,0x01,0x81,0x94,0x84,0xB4,0xA4,0x04,0x82,0x01,0x81,

0x94,0x84,0xC4,0xB4,0x04, 0x82,0x01,0x81,0xF4,0xD4,0xB4,

0xA4,0x94,0xE2,0x01,0xE1,0xD4,0xB4,0xC4,0xB4,0x04,

0x82,0x01,0x81,0x94,0x84,0xB4,0xA4,0x04,0x82,0x01,0x81,

0x94,0x84,0xC4,0xB4,0x04, 0x82,0x01,0x81,0xF4,0xD4,0xB4,

0xA4,0x94,0xE2,0x01,0xE1,0xD4,0xB4,0xC4,0xB4,0x04,

0x00};

code int note[]={

0x0000,0xFB03,0xFB8E,0xFC0B,0xFC43,0xFCAB,0xFD08,0xFD32,

0xFD81,0xFDC7,0xFE05,0xFE21,0xFE55,0xFE83,0xFE99,0xFEC0};

unsigned char i=0;

unsigned char hi_note,low_note;

static void timer1_isr(void) interrupt TF1_VECTOR using 2

{

   TR1=0;

   TL1=low_note;

   TH1=hi_note;

   TR1=1;

   P3_7=3_7;

}              

static void timer1_initialize(void)

{

   EA=0;

   TR1=0;

   TMOD = 0X10;

   ET1=1;

   EA=1;

}

void singing()

{

   unsigned char beat,temp;

   i=0;

   do {

       temp=song[i];              // 读出乐谱的一个byte

       if (temp==0) {             // 如果是0就表示音乐结束

           TR1=0;                 // 停止计时计数器1

           return;                // 返回

       }

       beat=temp & 0x0f;          //取出低阶的4位，这是拍子

       temp=(temp >> 4) & 0x0f;   //取出高阶4位当成音符的频率

       if (temp==0) TR1=0;        //如果拍子是0就表示休止符

       else {

        hi_note=note[temp] >> 8;  //根据音符的频率得到Timer1计数值

           low_note=note[temp] & 0x00FF;

              TR1=1;              //启动计时计数器1

       }

       delay(beat);               // 延迟拍子的时间

       i++;

   } while(1);

}   

void main (void)  {

   timer1_initialize();

   do {

        singing();

   } while (1);                   // 无穷循环

}