利用单片机定时器产生乐曲+源程序+仿真图

利用定时器产生乐曲仿真原理图如下（proteus仿真工程文件可到本帖附件中下载）


单片机源码：

1. 
   
2. #include<reg52.h>                 //库文件
   
3. #define uchar unsigned char//宏定义无符号字符型
   
4. #define uint unsigned int  //宏定义无符号整型
   
5. /********************************************************************
   
6.                             初始定义
   
7. *********************************************************************/
   
8. uchar Count;
   
9. sbit _Speak =P3^7 ; //讯响器控制脚
   
10. /********************************************************************
    
11.                             歌曲字根码
    
12. *********************************************************************/
    
13. unsigned char code SONG[] ={ //祝你平安
    
14. 0x26,0x20,0x20,0x20,0x20,0x20,0x26,0x10,0x20,0x10,0x20,0x80,0x26,0x20,0x30,0x20,
    
15. 0x30,0x20,0x39,0x10,0x30,0x10,0x30,0x80,0x26,0x20,0x20,0x20,0x20,0x20,0x1c,0x20,
    
16. 0x20,0x80,0x2b,0x20,0x26,0x20,0x20,0x20,0x2b,0x10,0x26,0x10,0x2b,0x80,0x26,0x20,
    
17. 0x30,0x20,0x30,0x20,0x39,0x10,0x26,0x10,0x26,0x60,0x40,0x10,0x39,0x10,0x26,0x20,
    
18. 0x30,0x20,0x30,0x20,0x39,0x10,0x26,0x10,0x26,0x80,0x26,0x20,0x2b,0x10,0x2b,0x10,
    
19. 0x2b,0x20,0x30,0x10,0x39,0x10,0x26,0x10,0x2b,0x10,0x2b,0x20,0x2b,0x40,0x40,0x20,
    
20. 0x20,0x10,0x20,0x10,0x2b,0x10,0x26,0x30,0x30,0x80,0x18,0x20,0x18,0x20,0x26,0x20,
    
21. 0x20,0x20,0x20,0x40,0x26,0x20,0x2b,0x20,0x30,0x20,0x30,0x20,0x1c,0x20,0x20,0x20,
    
22. 0x20,0x80,0x1c,0x20,0x1c,0x20,0x1c,0x20,0x30,0x20,0x30,0x60,0x39,0x10,0x30,0x10,
    
23. 0x20,0x20,0x2b,0x10,0x26,0x10,0x2b,0x10,0x26,0x10,0x26,0x10,0x2b,0x10,0x2b,0x80,
    
24. 0x18,0x20,0x18,0x20,0x26,0x20,0x20,0x20,0x20,0x60,0x26,0x10,0x2b,0x20,0x30,0x20,
    
25. 0x30,0x20,0x1c,0x20,0x20,0x20,0x20,0x80,0x26,0x20,0x30,0x10,0x30,0x10,0x30,0x20,
    
26. 0x39,0x20,0x26,0x10,0x2b,0x10,0x2b,0x20,0x2b,0x40,0x40,0x10,0x40,0x10,0x20,0x10,
    
27. 0x20,0x10,0x2b,0x10,0x26,0x30,0x30,0x80,0x00,
    
28. //路边的野华不要采
    
29. 0x30,0x1C,0x10,0x20,0x40,0x1C,0x10,0x18,0x10,0x20,0x10,0x1C,0x10,0x18,0x40,0x1C,
    
30. 0x20,0x20,0x20,0x1C,0x20,0x18,0x20,0x20,0x80,0xFF,0x20,0x30,0x1C,0x10,0x18,0x20,
    
31. 0x15,0x20,0x1C,0x20,0x20,0x20,0x26,0x40,0x20,0x20,0x2B,0x20,0x26,0x20,0x20,0x20,
    
32. 0x30,0x80,0xFF,0x20,0x20,0x1C,0x10,0x18,0x10,0x20,0x20,0x26,0x20,0x2B,0x20,0x30,
    
33. 0x20,0x2B,0x40,0x20,0x20,0x1C,0x10,0x18,0x10,0x20,0x20,0x26,0x20,0x2B,0x20,0x30,
    
34. 0x20,0x2B,0x40,0x20,0x30,0x1C,0x10,0x18,0x20,0x15,0x20,0x1C,0x20,0x20,0x20,0x26,
    
35. 0x40,0x20,0x20,0x2B,0x20,0x26,0x20,0x20,0x20,0x30,0x80,0x20,0x30,0x1C,0x10,0x20,
    
36. 0x10,0x1C,0x10,0x20,0x20,0x26,0x20,0x2B,0x20,0x30,0x20,0x2B,0x40,0x20,0x15,0x1F,
    
37. 0x05,0x20,0x10,0x1C,0x10,0x20,0x20,0x26,0x20,0x2B,0x20,0x30,0x20,0x2B,0x40,0x20,
    
38. 0x30,0x1C,0x10,0x18,0x20,0x15,0x20,0x1C,0x20,0x20,0x20,0x26,0x40,0x20,0x20,0x2B,
    
39. 0x20,0x26,0x20,0x20,0x20,0x30,0x30,0x20,0x30,0x1C,0x10,0x18,0x40,0x1C,0x20,0x20,
    
40. 0x20,0x26,0x40,0x13,0x60,0x18,0x20,0x15,0x40,0x13,0x40,0x18,0x80,0x00,};
    
41. /********************************************************************
    
42.                             定时中断服务函数
    
43. *********************************************************************/
    
44. void Time0_Init()
    
45. {
    
46.         TMOD = 0x01;
    
47.         IE = 0x82;
    
48.         TH0 = 0xD8;
    
49.         TL0 = 0xEF; //12MZ晶振，10ms
    
50. }
    
51. /*********************************************************************/
    
52. void Time0_Int() interrupt 1
    
53. {
    
54.         TH0 = 0xD8;
    
55.         TL0 = 0xEF;                     
    
56.         Count++; //长度加1
    
57. }
    
58. /*********************************************************************/
    
59. void Delay_xMs(unsigned int x) //1MS 延时子程序
    
60. {
    
61.         unsigned int i,j;
    
62.         for( i =0;i < x;i++ )
    
63.         {
    
64.                 for( j =0;j<3;j++ );
    
65.         }
    
66. }
    
67. /*********************************************************************/
    
68. void Play_Song(unsigned char i) //:歌曲播放子程序i 为播放哪一段曲目
    
69. {
    
70.         unsigned char Temp1,Temp2;
    
71.         unsigned int Addr;
    
72.         Count = 0; //中断计数器清0
    
73.         Addr = i * 217;
    
74. while(1)
    
75.         {
    
76.                 Temp1 = SONG[Addr++];
    
77.                 if ( Temp1 == 0xFF ) //休止符
    
78.                         {
    
79.                                 TR0 = 0; Delay_xMs(100);
    
80.                         }
    
81.         else if ( Temp1 == 0x00 ) //歌曲结束符
    
82.                 {
    
83.                         return;
    
84.                 }
    
85. else
    
86. {
    
87.         Temp2 = SONG[Addr++];
    
88.         TR0 = 1;
    
89.         while(1)
    
90.         {
    
91.         _Speak = ~_Speak;
    
92.         Delay_xMs(Temp1);
    
93.         if ( Temp2 == Count )
    
94.                 {
    
95.                         Count = 0;
    
96.                         break;
    
97.                 }
    
98.         }
    
99. }
    
100. }
     
101. }
     
102. /********************************************************************
     
103.                             主函数
     
104. *********************************************************************/
     
105. void main() //主程序
     
106. {
     
107.         Time0_Init(); //定时器0 中断初始化
     
108.         while(1)
     
109.         {
     
110.                 Play_Song(0);
     
111.         } //播放
     
112. }
     
113. 
     
114. /********************************************************************
     
115.                               结束
     
116. *********************************************************************/

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