music.i

Music demo for buzzer under AVR development environment.

// CodeVisionAVR C Compiler
// (C) 1998-2001 Pavel Haiduc, HP InfoTech S.R.L.

// I/O registers definitions for the ATmega16


#pragma used+
sfrb TWBR=0;
sfrb TWSR=1;
sfrb TWAR=2;
sfrb TWDR=3;
sfrb ADCL=4;
sfrb ADCH=5;
sfrw ADCW=4;      // 16 bit access
sfrb ADCSRA=6;
sfrb ADMUX=7;
sfrb ACSR=8;
sfrb UBRRL=9;
sfrb UCSRB=0xa;
sfrb UCSRA=0xb;
sfrb UDR=0xc;
sfrb SPCR=0xd;
sfrb SPSR=0xe;
sfrb SPDR=0xf;
sfrb PIND=0x10;
sfrb DDRD=0x11;
sfrb PORTD=0x12;
sfrb PINC=0x13;
sfrb DDRC=0x14;
sfrb PORTC=0x15;
sfrb PINB=0x16;
sfrb DDRB=0x17;
sfrb PORTB=0x18;
sfrb PINA=0x19;
sfrb DDRA=0x1a;
sfrb PORTA=0x1b;
sfrb EECR=0x1c;
sfrb EEDR=0x1d;
sfrb EEARL=0x1e;
sfrb EEARH=0x1f;
sfrw EEAR=0x1e;   // 16 bit access
sfrb UBRRH=0x20;
sfrb UCSRC=0X20;
sfrb WDTCR=0x21;
sfrb ASSR=0x22;
sfrb OCR2=0x23;
sfrb TCNT2=0x24;
sfrb TCCR2=0x25;
sfrb ICR1L=0x26;
sfrb ICR1H=0x27;
sfrb OCR1BL=0x28;
sfrb OCR1BH=0x29;
sfrw OCR1B=0x28;  // 16 bit access
sfrb OCR1AL=0x2a;
sfrb OCR1AH=0x2b;
sfrw OCR1A=0x2a;  // 16 bit access
sfrb TCNT1L=0x2c;
sfrb TCNT1H=0x2d;
sfrw TCNT1=0x2c;  // 16 bit access
sfrb TCCR1B=0x2e;
sfrb TCCR1A=0x2f;
sfrb SFIOR=0x30;
sfrb OSCCAL=0x31;
sfrb OCDR=0x31;
sfrb TCNT0=0x32;
sfrb TCCR0=0x33;
sfrb MCUCSR=0x34;
sfrb MCUCR=0x35;
sfrb TWCR=0x36;
sfrb SPMCR=0x37;
sfrb TIFR=0x38;
sfrb TIMSK=0x39;
sfrb GIFR=0x3a;
sfrb GICR=0x3b;
sfrb OCR0=0X3c;
sfrb SPL=0x3d;
sfrb SPH=0x3e;
sfrb SREG=0x3f;
#pragma used-

// Interrupt vectors definitions



// CodeVisionAVR C Compiler
// (C) 1998-2000 Pavel Haiduc, HP InfoTech S.R.L.


#pragma used+

void delay_us(unsigned int n);
void delay_ms(unsigned int n);

#pragma used-

/*      计时值=65536-8000000/8/2/频率   */ 
//      音名     计时值       频率hz
 //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]={0           ,63627       ,63731       ,63835       ,63928       ,64021       ,64103       ,64185       ,64270       ,64331       ,64400       ,64463       ,64524       ,
                                  64580         ,64633         ,64684         ,64732         ,64777         ,64820         ,64860         ,64898         ,64934         ,64968         ,65000         ,65030         ,
                                  65058       ,65085       ,65110       ,65134       ,65157       ,65178       ,65198       ,65217       ,65235       ,65252       ,65268       ,65283       };                                                                                            
unsigned int tone;
interrupt [9] 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=MusicTable1  ;//指向曲谱第一个音符 
        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);    //曲谱结束,等待                                            
}                 
/* -----------------   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(); 
     } 
}