基于单片机的生日快乐歌

#include<reg51.h>  

 #define uchar unsigned char  

 #define uint unsigned int  

 sbit BEEP=P3^7;  

 //生日快乐歌的音符频率表，不同频率由不同的延时来决定 

 uchar code SONG_TONE[]= 

 {212,212,190,212,159,169,212,212,190,212,142,159,212,212,106,126,159,169,190,119,119,126,159,142,159,0};  

 //生日快乐歌节拍表，节拍决定每个音符的演奏长短 

 uchar code SONG_LONG[]= 

 {9,3,12,12,12,24,9,3,12,12,12,24, 9,3,12,12,12,12,12,9,3,12,12,12,24,0};  

 //延时 

 void DelayMS(uint x)  

 {  

 uchar t;  

 while(x--) for(t=0;t<120;t++);  

 }  

 //播放函数 

 void PlayMusic()  

 {   uint i=0,j,k;  

 while(SONG_LONG[i]!=0||SONG_TONE[i]!=0)  

 { //播放各个音符，SONG_LONG为拍子长度  

 for(j=0;j<SONG_LONG[i]*20;j++)  

 {  

 BEEP=~BEEP;  

 //SONG_TONE延时表决定了每个音符的频率  

 for(k=0;k<SONG_TONE[i]/3;k++);  

 }  

 DelayMS(10);  

 i++;  

 }  

 }  

 void main()  

 {  

 BEEP=0;  

 while(1)  

 {  

 PlayMusic(); //播放生日快乐  

 DelayMS(500); //播放完后暂停一段时间  

 }  

 }