音乐.c

用AVR 音乐合成： 1.音乐数据存放于芯片的flash存贮器中2.PA口显示不同的音阶变化。 3.音乐数据的低四位选择音调频率

/*******************************************************************
        实验名称:音乐合成演示实验
			晶振：内部    8M
		接线方法：
		        1.PC0和PD7分别接扬声器的两个输入端子。
		        2.PA0-PA3分别接LED。
        使用说明：
			    1.音乐数据存放于芯片的flash存贮器中。
				2.PA口显示不同的音阶变化。
				3.音乐数据的低四位选择音调频率，
				高四位*5后，为音调持续时间。
********************************************************************/
#include <iom16v.h>
#include <macros.h>
#define DO	63622	//523
#define RE	63831	//587
#define	MI	64017	//659
#define FA	64102	//698
#define	SO	64259	//784
#define LA	64398	//880
#define	TI	64522	//988                	                        	
#define DO_H	64578	//1046
#define RE_H	64683	//1174
#define MI_H	64776	//1318
#define FA_H	64819	//1397
#define SO_H	64897	//1568
#define LA_H	64966	//1760
#define TI_H	65028	//1976
#define DO_HH	65057	//2093
void delay_us(int time)
{//微秒级延时程序     
 	do
 	{
  	   time--;
 	}	
    while (time>1);
}
void delay_ms(unsigned int time)
{//毫秒级延时程序
 	while  (time!=0)
    {		
  		delay_us(1000);
  		time--;
     }
}						  	
const unsigned char sound[]={ //乐曲数据表
                        /*************梁祝****************/
						0x40,0x4c,0x4a,0x49,0xc8,0x49,0x47,0x46,
						0xe5,0x4e,0x4d,0x4e,0x6c,0x2d,0x4e,
						0x4d,0x2c,0x2d,0x2e,0x2d,0x6f,0x2d,
						0x2c,0x2d,0x2c,0x29,0x2a,0x2b,
						0x2a,0x29,0xc8,0x4c,0x4e,0x49,0x46,0x48,
						0xc5,0x26,0x28,0xe5,0x83,0x65,0x26,
						0x68,0x29,0x26,0x28,0x45,0x6c,0x2f,0x3d,
						0x1c,0x2a,0x2c,0xe9,0x69,0x2a,0x47,0x46,
						0x65,0x26,0x48,0x49,0x43,0x48,0x36,0x15,
						0x26,0x18,0xe5,0x6a,0x2c,0x47,0x49,0x26,
						0x28,0x85,0x33,0x15,0x43,0x25,0x26,0x27,
						0x29,0xc6,0x25,0x26,0x68,0x29,0x4c,0x4a,
						0x49,0x2a,0x29,0x49,0x26,0x25,0x83,0x88,
						0x26,0x28,0x26,0x25,0x23,0x25,0x26,0x28,
						0xc5,0x04,0x04,
						/*************希望*****************/	
						0x49,0x4a,0x4a,0x6a,0x29,0x48,0x46,0x68,
						0x29,0xc8,0x49,0x4a,0x4a,0x6a,0x2c,0x4a,
						0x4a,0x49,0x4a,0xca,0x4c,0x4d,0x4d,0x6d,
						0x2c,0x4a,0x4a,0x4c,0x4d,0xcc,0x49,0x4a,
						0x4a,0x69,0x2a,0x4a,0x49,0x4a,0x46,
						0x18,0xe6,0x29,0x29,0x29,0x28,0x46,
						0x29,0x29,0x29,0x28,0x46,0x49,0x4a,
						0x48,0x69,0x2a,0x4c,0x2d,0x2d,0x2d,
						0x2c,0x4a,0x29,0x29,0x29,0x28,0x46,
						0x46,0x45,0x46,0xe6,
						0x00};			  		  						  
/*	  		    音阶表				*/	
const unsigned int TONETABLE[15]={DO,RE,MI,FA,SO,LA,TI,DO_H,
			    	 	RE_H,MI_H,FA_H,SO_H,LA_H,TI_H,DO_HH};
			    	 	
/*			  音阶重装常数			*/						
unsigned int toneconst;								  							   						 				 	 	 
#pragma interrupt_handler timer1_ovf_isr:9
void timer1_ovf_isr(void)
{
	  TCNT1=toneconst;
	  PORTC^=1;
}	 	 
void music(void)
 {
	  unsigned char temp=0,temp1=0;
	  unsigned int sound_add=0;
	  TCCR1A = 0x00;
	  TCCR1B =(1<<CS11);//8分频
	  temp1=sound[sound_add];
	 
	  while(temp1!=0)
 	  		{
			 temp=temp1; 
			 temp&=0x0f;
			 if(temp!=0)
			   {
			    TIMSK|=(1<<TOIE1);//根据SOUNDTABLE中数据的低四位选择音调频率
			    temp--;			   
        	    toneconst=TONETABLE[temp];
			    TCNT1=toneconst;
				PORTA=toneconst;
 			   }
			 temp=temp1;
			 temp>>=4;
			 temp&=0x0f;
			 delay_ms(temp*129);//根据SOUNDTABLE中数据的高四位*5后，为音调持续时间
			 TIMSK&=~(1<<TOIE1);
			 sound_add++;
			 temp1=sound[sound_add];
			
			}
		PORTC = 0xFF;	                                         	
}	 	 	 	 
/*	  	   		 主程序 	   	  		*/	  
void main(void)
	 {
	  
	DDRC=0x01; 
	DDRD=0x80;
	DDRA=0x0f;
    SREG=0x80;
	  while(1)
	   	{
	     music();
	    }
	 }