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
}
}