music.c~

Music demo for buzzer under AVR development environment.

#include<mega16.h>
#include<delay.h> 
/*      计时值=65536-8000000/8/2/频率   */ 
//      音名     计时值       频率hz
#define DO_L     63627       //262
#define DOA_L    63731       //277
#define RE_L     63835       //294
#define REA_L    63928       //311
#define MI_L     64021       //330 
#define FA_L     64103       //349 
#define FAA_L    64185       //370
#define SO_L     64270       //392
#define SOA_L    64331       //415 
#define LA_L     64400       //440
#define LAA_L    64463       //466
#define TI_L     64524       //494 
#define DO       64580       //523
#define DOA      64633       //554
#define RE       64684       //587 
#define REA      64732       //622
#define MI       64777       //659 
#define FA       64820       //698 
#define FAA      64860       //740
#define SO       64898       //784 
#define SOA      64934       //831
#define LA       64968       //880  
#define LAA      65000       //932
#define TI       65030       //988                                               
#define DO_H     65058       //1046
#define DOA_H    65085       //1109
#define RE_H     65110       //1175
#define REA_H    65134       //1245 
#define MI_H     65157       //1318 
#define FA_H     65178       //1397
#define FAA_H    65198       //1480
#define SO_H     65217       //1568 
#define SOA_H    65235       //1661
#define LA_H     65252       //1760 
#define LAA_H    65268       //1865
#define TI_H     65283       //1976 
#define ZERO     0           //休止符
#define MusicTable MusicTable1  
 //十进制:     0
 //休止符:     0
 
 //十进制:     1     2     3     4     5     6     7     8     9     10    11     12
 //低音  :     1     #1    2     #2    3     4     #4    5     #5    6     #6     7
 
 //十进制:     13    14    15    16    17    18    19    20    21    22    23     24
 // 中音 :     1     #1    2     #2    3     4     #4    5     #5    6     #6     7
 
 //十进制:     25    26    27    28    29    30    31    32    33    34    35     36
 // 高音 :     1     #1    2     #2    3     4     #4    5     #5    6     #6     7
 
 /*-------------Two Tigers-------------*/
char MusicTable2[]={13,2,  15,2,  17,2,   13,1,  0,1,  
                    13,2,  15,2,  17,2,   13,1,  0,1, 
                    17,2,  18,2,  20,2,    0,2,
                    17,2,  18,2,  20,2,    0,2,
                    20,1,  22,1,  20,1,   18,1,  17,2,  13,2,  
                    20,1,  22,1,  20,1,   18,1,  17,2,  13,2, 
                    15,2,   8,2,  13,2,    0,2,
                    15,2,   8,2,  13,2,    0,2,
                    0xff};                                      

/*--------------Happy New Year-------------------*/
char MusicTable1[]={ 13,1,  13,1,  13,2,   8,2,//音符,拍数,  
                     17,1,  17,1,  17,2,  13,2,
                     13,1,  17,1,  20,2,  20,2,
                     18,1,  17,1,  15,2,   0,2,
                     15,1,  17,1,  18,2,  18,2,
                     17,1,  15,1,  17,2,  13,2,
                     13,1,  17,1,  15,2,   8,2,
                     12,1,  15,1,  13,2,   0,2,
                     
                     13,1,  13,1,  13,2,   8,2,//音符,拍数,  
                     17,1,  17,1,  17,2,  13,2,
                     13,1,  17,1,  20,2,  20,2,
                     18,1,  17,1,  15,2,   0,2,
                     15,1,  17,1,  18,2,  18,2,
                     17,1,  15,1,  17,2,  13,2,
                     13,1,  17,1,  15,2,   8,2,
                     12,1,  15,1,  13,2,   0,2,
                     0xff};
                                                
                        //      0,    1,   #1,   2,   #2,   3,   4,    #4,   5,  #5,   6,    #6, 7,
unsigned int ToneTable[37]={ZERO,DO_L,DOA_L,RE_L,REA_L,MI_L,FA_L,FAA_L,SO_L,SOA_L,LA_L,LAA_L,TI_L,
                                  DO  ,DOA  ,RE  ,REA  ,MI  ,FA  ,FAA  ,SO  ,SOA  ,LA  ,LAA  ,TI  ,
                                  DO_H,DOA_H,RE_H,REA_H,MI_H,FA_H,FAA_H,SO_H,SOA_H,LA_H,LAA_H,TI_H};                                                                                            
unsigned int tone;
interrupt [TIM1_OVF] void tim1_ovf_isr(void)
{
        int i;
        if(tone)//若不是休止符，则发声
        {
                TCNT1=tone;          
                i=PORTA;
                PORTA=~i;//A口电平翻转
        }
}         
void music() 
{       

        char *pMusic=MusicTable; 
        TCCR1A=0x00;   //普通端口操作
        TCCR1B=0b0000010;//8分频  
        while(*pMusic!=0xff)//0xff为音乐结尾符 
            { 
                TIMSK=0b00000100;//溢出中断使能      
                tone=ToneTable[*pMusic];//取音调频率 
                TCNT1=tone;//将频率值对应的计数值写入计时器,开始发声 
                
                *pMusic++;//乐谱音符指针+1 ,取拍数
                delay_ms((*pMusic)*100);//按拍数延时,(CodeVision中定义delay_ms(unsigned int);)
                delay_ms((*pMusic)*100);
                TIMSK=0b0000000;//发声结束 ,屏蔽溢出中断
                
                *pMusic++;//乐谱音符指针+1 ，取下一音符
            } 
        delay_ms(1000);                                                
}                 
/* -----------------   主程序 ---------------- */      
void main(void) 
{ 
     DDRA=0x80; //HappyAVR使用PA7与蜂鸣器相连,设置PA7为输出
     PORTA=0xff; 
     #asm("sei"); 
     while(1) 
     { 
        music(); 
     } 
}