51单片机按键选播电子音乐或者音乐盒程序

电子音乐盒的设计                        

设计任务：1. 查阅资料，了解单片机控制单音喇叭发声原理；

                2. 设计基于单片机的电子音乐盒；

                      3．通过按钮可选择不同的音乐，切换3首音乐


单片机源程序如下:

1. #include<reg51.h>
   
2. #define uchar unsigned char
   
3. #define uint unsigned int
   
4. sbit BEEP = P3^7;
   
5. uint code Tone_Delay_Table[] =
   
6. {64021,64103,64260,64400,64524,64580,64684,64777,64820,64898,64968,65030,65058,65110,65157,65178};
   
7. uchar code Song1_Tone [] =
   
8. {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0xFF};
   
9. uchar code Song1_Time [] =
   
10. {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0xFF};
    
11. uchar code Song2_Tone [] =
    
12. {3,5,5,3,3,2,1,2,3,5,3,2,3,5,3,2,1,2,3,2,1,1,0xFF};
    
13. uchar code Song2_Time [] =
    
14. {2,1,1,2,1,1,1,2,1,1,1,2,1,1,2,1,1,1,2,1,1,1,0xFF};
    
15. uchar code Song3_Tone [] =
    
16. {1,3,3,3,3,5,4,2,5,3,7,6,5,5,7,4,4,3,6,7,2,1,0xFF};
    
17. uchar code Song3_Time [] =
    
18. {2,1,1,2,1,1,1,2,1,1,3,2,1,1,2,4,1,1,2,1,1,1,0xFF};
    
19. uchar Song_Index = 0,Tone_Index = 0;
    
20. uchar*Song_Tone_Pointer,*Song_Time_Pointer;
    
21. uchar i = 0;
    
22. void DelayMS(uint ms)
    
23. {
    
24.    uchar t;
    
25.    while(ms--) for (t = 0; t < 120; t++);
    
26. }
    
27. void Key_Press() interrupt 0
    
28. {
    
29.   TR0 = 0;
    
30.   Song_Index = ( Song_Index + 1 ) % 3;
    
31.   switch (Song_Index)
    
32. {
    
33.   case 0: Song_Tone_Pointer = Song1_Tone;
    
34.           Song_Time_Pointer = Song1_Time;
    
35.           break;
    
36.   case 1: Song_Tone_Pointer = Song2_Tone;
    
37.           Song_Time_Pointer = Song2_Time;
    
38.           break;
    
39. 
    
40.   case 2: Song_Tone_Pointer = Song3_Tone;
    
41.           Song_Time_Pointer = Song3_Time;
    
42.           break;
    
43. }
    
44. i = 0;
    
45. TR0 = 1;
    
46. 
    
47. }
    
48. //----------------------------------------------------------------------------
    
49. void Timer0_Play_Music() interrupt 1
    
50. {
    
51. TH0 = Tone_Delay_Table[ Tone_Index ] / 256;
    
52. TL0 = Tone_Delay_Table[ Tone_Index ] % 256;
    
53. BEEP =~BEEP;
    
54. }
    
55. //-------------------------------------------------------------------------------
    
56. void main()
    
57. {
    
58. TMOD = 0x01;
    
59. IP   =0x01;
    
60. IE   =0x83;
    
61. TR0  =0;
    
62. Song_Tone_Pointer =Song1_Tone;
    
63. Song_Tone_Pointer =Song1_Time;
    
64. while (1)
    
65. {
    
66.    Tone_Index = Song_Tone_Pointer[i];
    
67.    if (Tone_Index==0xFF)
    
68. {
    
69.   i=0;
    
70.   DelayMS(2000);
    
71.   continue;
    
72. }
    
73. TR0 = 1;
    
74. DelayMS(Song_Time_Pointer[Tone_Index]*240);
    
75. TR0 = 0;
    
76. i++;
    
77. }
    
78. 
    
79. }
    

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2019-6-24 20:49 上传

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原代码

能在程序后面加一下注释吗，楼主