蜂鸣器播放生日快乐歌曲

//-------------------------------------------------

//以下程序为用蜂鸣器播放生日快乐歌程序，播放完一遍

//之后间隔一段时间再重复播放，请同学们自行分析

//------------------------------------------------

#include<reg51.h>

#define uchar unsigned char

#define uint unsigned int

sbit BUZ = P2^5;

uchar code music_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};

//以上为生日快乐歌音符频率表,频率表最后为0表示播放完成

uchar code music_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};

//以上为生日快乐歌节拍表（即每个音符演奏长短）

//----------------------------------------------

//延时子程序

//-----------------------------------------------

void delay(uint x)

{

uchar t;

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

}

//------------------------------------------------

//播放歌曲子程序

//------------------------------------------------

void playmusic()

{

uint i = 0,j,k;

while(music_long[i] !=0 || music_tone[i] !=0)

{

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

{

BUZ = ~BUZ;

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

}

delay(10);

i++; //下一个音符

}

}

//--------------------------------------

//主程序

//---------------------------------------

void main()

{

while(1)

{

playmusic();

delay(500);//播放完后暂停一会后继续播放

}

}

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