C51单片机利用定时器和蜂鸣器唱歌

C51单片机利用定时器和蜂鸣器唱歌

引用

CSDN

1.

https://m.blog.csdn.net/weixin_42411288/article/details/142243441

实验目的

学会利用单片机的定时器，掌握蜂鸣器的发声操作。

实验现象

用单片机的P2.3口输出不同占空比的方波来控制与它相连的蜂鸣器，当方波的占空比不同时蜂鸣器发出的音调就不同，由此根据歌曲的音调编程实现让蜂鸣器唱歌。

实验说明

占空比：一个周期中，高电平的长度比上总周期的长度的值再乘上100%。标准方波的占空比为50%。

硬件电路

程序代码

#include <reg52.h>  

//实验目的：学会利用单片机的定时器，掌握蜂鸣器的发声操作  
//实验现象：用单片机的P2.3口输出不同占空比的方波来控制与它相连的蜂鸣器，  
//当方波的占空比不同时蜂鸣器发出的音调就不同，由此根据歌曲的音调编程实现让蜂鸣器唱歌。  
//占空比：一个周期中，高电平的长度比上总周期的长度的值再乘上100%。标准方波的占空比为50%。  

sbit beep=P2^3; //蜂鸣器控制位  
unsigned int num;  
unsigned char code SONG[] =  
{  
//祝你平安，以下为编码  
0x26,0x20,0x20,0x20,0x20,0x20,0x26,0x10,0x20,0x10,0x20,0x80,  
0x26,0x20,0x30,0x20,0x30,0x20,0x39,0x10,0x30,0x10,0x30,0x80,  
0x26,0x20,0x20,0x20,0x20,0x20,0x1c,0x20,0x20,0x80,0x2b,0x20,  
0x26,0x20,0x20,0x20,0x2b,0x10,0x26,0x10,0x2b,0x80,0x26,0x20,  
0x30,0x20,0x30,0x20,0x39,0x10,0x26,0x10,0x26,0x60,0x40,0x10,  
0x39,0x10,0x26,0x20,0x30,0x20,0x30,0x20,0x39,0x10,0x26,0x10,  
0x26,0x80,0x26,0x20,0x2b,0x10,0x2b,0x10,0x2b,0x20,0x30,0x10,  
0x39,0x10,0x26,0x10,0x2b,0x10,0x2b,0x20,0x2b,0x40,0x40,0x20,  
0x20,0x10,0x20,0x10,0x2b,0x10,0x26,0x30,0x30,0x80,0x18,0x20,  
0x18,0x20,0x26,0x20,0x20,0x20,0x20,0x40,0x26,0x20,0x2b,0x20,  
0x30,0x20,0x30,0x20,0x1c,0x20,0x20,0x20,0x20,0x80,0x1c,0x20,  
0x1c,0x20,0x1c,0x20,0x30,0x20,0x30,0x60,0x39,0x10,0x30,0x10,  
0x20,0x20,0x2b,0x10,0x26,0x10,0x2b,0x10,0x26,0x10,0x26,0x10,  
0x2b,0x10,0x2b,0x80,0x18,0x20,0x18,0x20,0x26,0x20,0x20,0x20,  
0x20,0x60,0x26,0x10,0x2b,0x20,0x30,0x20,0x30,0x20,0x1c,0x20,  
0x20,0x20,0x20,0x80,0x26,0x20,0x30,0x10,0x30,0x10,0x30,0x20,  
0x39,0x20,0x26,0x10,0x2b,0x10,0x2b,0x20,0x2b,0x40,0x40,0x10,  
0x40,0x10,0x20,0x10,0x20,0x10,0x2b,0x10,0x26,0x30,0x30,0x80,0x00,  
//路边的野华不要采 , 以下为这首歌的编码  
0x30,0x1C,0x10,0x20,0x40,0x1C,0x10,0x18,0x10,0x20,0x10,0x1C,  
0x10,0x18,0x40,0x1C,0x20,0x20,0x20,0x1C,0x20,0x18,0x20,0x20,  
0x80,0xFF,0x20,0x30,0x1C,0x10,0x18,0x20,0x15,0x20,0x1C,0x20,  
0x20,0x20,0x26,0x40,0x20,0x20,0x2B,0x20,0x26,0x20,0x20,0x20,  
0x30,0x80,0xFF,0x20,0x20,0x1C,0x10,0x18,0x10,0x20,0x20,0x26,  
0x20,0x2B,0x20,0x30,0x20,0x2B,0x40,0x20,0x20,0x1C,0x10,0x18,  
0x10,0x20,0x20,0x26,0x20,0x2B,0x20,0x30,0x20,0x2B,0x40,0x20,  
0x30,0x1C,0x10,0x18,0x20,0x15,0x20,0x1C,0x20,0x20,0x20,0x26,  
0x40,0x20,0x20,0x2B,0x20,0x26,0x20,0x20,0x20,0x30,0x80,0x20,  
0x30,0x1C,0x10,0x20,0x10,0x1C,0x10,0x20,0x20,0x26,0x20,0x2B,  
0x20,0x30,0x20,0x2B,0x40,0x20,0x15,0x1F,0x05,0x20,0x10,0x1C,  
0x10,0x20,0x20,0x26,0x20,0x2B,0x20,0x30,0x20,0x2B,0x40,0x20,  
0x30,0x1C,0x10,0x18,0x20,0x15,0x20,0x1C,0x20,0x20,0x20,0x26,  
0x40,0x20,0x20,0x2B,0x20,0x26,0x20,0x20,0x20,0x30,0x30,0x20,  
0x30,0x1C,0x10,0x18,0x40,0x1C,0x20,0x20,0x20,0x26,0x40,0x13,  
0x60,0x18,0x20,0x15,0x40,0x13,0x40,0x18,0x80,0x00,  
};  

void Time0_Init()  
{  
TMOD=0x01; //设置定时器0工作方式1  
TH0=(65536-45872)/256; //装初值11.059M晶振定时50ms数为45872  
//THX=(65536-N)/256 N=X(us)/H1(机器周期) H1=12*（1/晶振频率）  
TL0=(65536-48572)%256;  
EA=1;            //开总中断
ET0=1;           //开定时器0中断		
}  

void T0_time() interrupt 1  
{  
TH0=(65536-45872)/256; //装初值11.059M晶振定时50ms数为45872  
//THX=(65536-N)/256 N=X(us)/H1(机器周期) H1=12*（1/晶振频率）  
TL0=(65536-48572)%256;  
num++;  
}  

void Delay_xMs(unsigned int x)  
{  
unsigned int i,j;  
for( i =0;i < x;i++ )  
{  
for( j =0;j<3;j++ );  
}  
}  

void Play_Song(unsigned char i)  
{  
unsigned char Temp1,Temp2;  
unsigned int Addr;  
num = 0; //中断计数器清 0  
Addr = i * 217;  
while(1)  
{  
Temp1 = SONG[Addr++];  
if ( Temp1 == 0xFF ) //休止符  
{  
TR0 = 0;  
Delay_xMs(100);  
}  
else if ( Temp1 == 0x00 ) //歌曲结束符  
{  
return;  
}  
else  
{  
Temp2 = SONG[Addr++];  
TR0 = 1;  
while(1)  
{  
beep = ~beep;  
Delay_xMs(Temp1);  
if ( Temp2 == num )  
{  
num = 0;  
break;  
}  
}  
}  
}  
}  

void main()  
{  
Time0_Init(); //定时器 0 中断初始化  
while(1)  
{  
Play_Song(0); //播放  
}  
}