Linux编程实现蜂鸣器演奏康定情歌

 

1. #include   <sys/io.h>  
2. #include   <unistd.h>  
4. void   play(unsigned   int*   freq,   unsigned   int*   delay);  
6. main()  
7. {  
8.       int   i;  
9.       unsigned   int   freq[]={   330   ,   392   ,   330   ,   294   ,   330   ,   392   ,  
10.               330   ,   394   ,   330   ,   330   ,   392   ,   330   ,  
11.               294   ,   262   ,   294   ,   330   ,   392   ,   294   ,  
12.               262   ,   262   ,   220   ,   196   ,   196   ,   220   ,  
13.               262   ,   294   ,   330   ,   262   ,   0   }   ;  
15.       unsigned   int   time[]={   50   ,   50   ,   50   ,   25   ,   25   ,   50   ,  
16.               25   ,   25   ,   100,   50   ,   50   ,   25   ,  
17.               25   ,   50   ,   50   ,   25   ,   25   ,   100,  
18.               50   ,   25   ,   25   ,   50   ,   25   ,   25   ,  
19.               50   ,   25   ,   25   ,   100   };  
21.       unsigned   int   freq2[]={  
22.               196,262,262,262,330,294,262,294,330,294,262,  
23.               330,394,440,440,394,330,330,262,294,262,294,  
24.               330,294,262,230,230,196,262,440,394,330,330,  
25.               262,294,262,294,440,394,330,330,394,440,523,  
26.               394,330,330,262,294,262,294,330,294,262,230,  
27.               230,196,262,440,394,330,330,262,294,262,294,  
28.               440,394,330,330,394,440,523,394,330,330,262,  
29.               294,262,294,330,294,262,230,230,196,262,0  
30.       };  
32.       unsigned   int   time2[]={  
33.               25,38,12,25,25,38,12,25,12,12,56,25,25,50,25,  
34.               38,12,12,12,38,12,25,12,12,38,12,25,25,100,25,  
35.               38,12,12,12,38,12,25,25,38,12,25,25,100,25,38,  
36.               12,12,12,38,12,25,12,12,38,12,25,25,100,25,38,  
37.               12,12,12,38,12,25,25,38,12,25,25,100,25,38,12,  
38.               12,12,38,12,25,12,12,38,12,25,25,100  
39.       };  
40. unsigned   int   freq_alert[]={  
41.               2000,   2400,   0  
42.       };  
43.       unsigned   int   time_alert[]={  
44.               50,   60  
45.       };  
46.       for(i   =   0;   i   <   5;   i++)  
47.       {  
48.               play(freq_alert,   time_alert);  
49.       }  
50.       play(freq2,   time2);  
51. }  
53. void play(unsigned   int*   freq,   unsigned   int*   time)  
54. {  
55.       int   i;  
56.       for(i=0;freq[i]!=0;i++)  
57.       {  
58.               speaker(freq[i],   time[i]);  
59.       }  
60. }  
62. int speaker(unsigned   int   freq,unsigned   int   delay)  
63. {     
64.     static   int   flag=0,bit;  
65.     if(fl   ag==0)  
66.     {  
67.           flag=1;  
68.           iopl(3);  
69.     }  
70.     outb(0xb6,0x43);  
71.     outb((freq & 0xff),     0x42);  
72.     outb((freq>>8), 0x42);  
73.     bit=inb(0x61);  
74.     outb(3   |   bit,0x61);  
75.     usleep(10000*delay);  
76.     outb(0xfc   |   bit,0x61);  
77. }