蜂鳴器播放生日快樂歌
仿真圖：
仿真圖
程序：
#include <reg51.h>
#define uint unsigned int
#define uchar unsigned char
sbit beep = P3^0;
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};
void DelayMS(uint x)
{
uchar t;
while(x--) for(t=0;t<120;t++);
}
void PlayMusic()
{
uint i=0,j,k;
while(SONG_LONG[ i]!=0||SONG_TONE[ i]!=0)
{
for(j=0;j<SONG_LONG[ i]*20;j++)
{
beep=~beep;
for(k=0;k<SONG_TONE[ i]/3;k++);
}
DelayMS(10);
i++;
}
}
void main()
{
beep=0;
while(1)
{
PlayMusic();
DelayMS(500);
}
}
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