#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit BEEP=P3^7;
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};
/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 z)
{
uint x,y;
for(x=0;x<z;x++)
// while(x--)
for(y=0;y<110;y++);
}
//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
DelayMS(500); //播放完后暂停一段时间
}
}
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