51单片机蜂鸣器播放生日快乐歌

ID:511857 · 发表于 2023-1-8 22:45

#include "reg51.h"

#define uint unsigned int
#define uchar unsigned char

sbit beep = P2^5;

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};
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};

//延时函数
void DelayMS(uint x)
{
   uchar t;
   while(x--) for(t=0;t<120;t++);
}

//控制音频、节拍函数
void PlayMusic()
{
   uint i=0,j,k;
   while(SONG_LONG[ i]!=0||SONG_TONE[ i]!=0)[ i][ i]
{
   for(j=0;j<SONG_LONG[ i]*20;j++)  //播放各个音符，SONG_LONG 为拍子长度[ i]
{
      beep=~beep;
      for(k=0;k<SONG_TONE[ i]/3;k++);//SONG_TONE 延时表决定了每个音符的频率[ i]
}
DelayMS(10);
i++;
}
}

void main()
{
beep=0;
while(1)
{
      PlayMusic(); //播放生日快乐
      DelayMS(5000); //播放完后暂停一段时间
}
}

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