单片机声光电子琴，含原理图，源代码（c代码），成品图 -

/*
8个按键发出8个基本音，
能播放内置音乐，音乐跟随灯光闪烁
*/
#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
sbit speaker=P1^4;//喇叭接30脚
sbit key1=P1^0;//流水灯按键(暂时)
sbit key2=P1^1;//播放音乐按键（暂定）
uchar a,b,num1,s1num,n1,n2;
uchar qushu=0;
char num;//定义num为可以负数
uchar code yinfu[]={0xfb,0xe9, //Do
0xfc,0x5c, //Re
0xfc,0xc1, //Mi
0xfc,0xef, //Fa
0xfd,0x45, //So
0xfd,0x92, //La
0xfd,0xd0, //Si
0xfd,0xee, //Do#
0x00,0x00, //间隔
};
uchar code shengri_tone[]={ 1,0,1,2,1,4,3,0, //生日快乐音调
1,0,1,2,1,5,4,0,
1,0,1,8,6,4,3,2,0,
7,0,7,6,4,5,4,0 //0代表不发声，即停顿；数字即为音调
};
uchar code laohu_tone[]={1,2,3,1,0,1,2, //两只老虎乐谱 40个音符
3,1,0,3,4,5,0,3,
4,5,0,5,6,5,4,3,
1,0,5,6,5,4,3,1,
0,3,2,1,0,3,2,1,0
};
uchar code yishan_tone[]={1,1,5,5,6,6,5, //星星乐谱 54个音符
0,4,4,3,3,2,2,
1,0,5,5,4,4,3,
3,2,0,5,5,4,4,
3,3,2,0,1,1,5,5,
6,6,5,0,4,4,3,
3,2,2,1,0
};
uchar code shengri_beat[]={ 24,1,24,48,48,48,72,5,//节拍
24,1,24,48,48,48,72,5,
24,1,24,48,48,48,48,72,5,
24,1,24,48,48,48,72,5 //节拍，即tone表各音调的延时
};
uchar code laohu_beat[]={ 24,24,24,48,5,24,24,//节拍
24,48,5,24,24,48,5,24,
24,72,5,24,24,24,24,//节拍
24,48,5,24,24,24,24,24,72,
5,24,24,48,5,24,24,//节拍
72,5//节拍 //节拍，即tone表各音调的延时
};
uchar code yishan_beat[]={ 24,24,24,24,24,24,48,//节拍
5,24,24,24,24,24,24,72,
5,24,24,24,24,24,24,//节拍
48,5,24,24,24,24,24,24,72,
5,24,24,24,24,24,24,//节拍
48,5,24,24,24,24,24,24,72,5//节拍，即tone表各音调的延时
};
uchar code ledtable[]={0x7f,0xbf,0xdf,0xef, //取反
0xf7,0xfb,0xfd,0xfe};//P0组口的发光二极管代码（焊接过程可能会相反，具体更改）
uchar code ledtable2[]={0x7f,0xbf,0xdf,0xef, //取反
0xf7,0xfb,0xfd,0xfe};//P2组口发光二极管代码,相反！
void check_key();//改为P3组为按键
void keyscan();
void turn();//顺时针流动
void back();
void qianhou();
void dangshuang();
void delay(uint z);//延时函数声明
void delay1(void);//声明第二个延时函数
void play1(void);//播放生日快乐
void main()
{
s1num=0;//流水灯种类标志
key1=1;
key2=1;
TMOD=0x01;
TH0=a;
TL0=b;
ET0=1;//打开定时器，但是未允许中断
TR0=1;
while(1)
{
check_key();
keyscan();
}
}
void time0() interrupt 1
{
TH0=a;
TL0=b;
speaker=~speaker;
}
void check_key()
{
P3=0xff;//先赋给P2组口高电平
switch(P3)//按下一个键相应4个灯亮
{
case 0xfe:P0=0xee;P2=0x77;a=0xfb;b=0xe9;EA=1;break;//P0,P2组为发光二极管组
case 0xfd:P0=0xdd;P2=0xbb;a=0xfc;b=0x5c;EA=1;break;//注意：EA不能改为TR0
case 0xfb:P0=0xbb;P2=0xdd;a=0xfc;b=0xc1;EA=1;break;
case 0xf7:P0=0x77;P2=0xee;a=0xfc;b=0xef;EA=1;break;
case 0xef:P0=0xee;P2=0x77;a=0xfd;b=0x45;EA=1;break;
case 0xdf:P0=0xdd;P2=0xbb;a=0xfd;b=0x92;EA=1;break;
case 0xbf:P0=0xbb;P2=0xdd;a=0xfd;b=0xd0;EA=1;break;
case 0x7f:P0=0x77;P2=0xee;a=0xfd;b=0xee;EA=1;break;
default:EA=0;speaker=0;//P0=0xff;P2=0xff ;
}
}
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void keyscan()
{
if(key1==0)
{
delay(5);
if(key1==0)
{
s1num++;
while(!key1);
if(s1num==1)
{
turn();
}
}
if(s1num==2)
{
back();
}
if(s1num==3)
{
qianhou();
}
if(s1num==4)
{
dangshuang();
}
if(s1num==5)
s1num=1;
}
if(key2==0)
{
delay(5);
if(key2==0)
{
qushu++;
if(qushu==4)
{
qushu=1;
}
while(~key2);
play1();
}
}
}
void delay1(void)//第二个延时函数
{
uchar n=15;
while(n--)
{
uchar i;
for(i=0;i<125;i++);
}
}
void play1(void)//播放生日快乐
{
uchar m=0;
uchar s;
uchar c=1;
P0=0xaa;
P2=0x55;
if(qushu==1)
{
while(1)
{
EA=0;
c=shengri_tone[m]; //取音符
s=shengri_beat[m]; //取节拍
a=yinfu[2*c-2];
b=yinfu[2*c-1];
EA=1;
while(s--)
{
delay1();
P0=~P0;
P2=~P2;
}
m++;
if(m>=33) return; //数值是shengri相关表中的元素数量
}
}
else if(qushu==2)
{
while(1)
{
EA=0;
c=laohu_tone[m]; //取音符
s=laohu_beat[m]; //取节拍
a=yinfu[2*c-2];
b=yinfu[2*c-1];
EA=1;
while(s--)
{
delay1();
P0=~P0;
P2=~P2;
}
m++;
if(m>=40) return; //数值是shengri相关表中的元素数量
}
}
else if(qushu==3)
{
while(1)
{
EA=0;
c=yishan_tone[m]; //取音符
s=yishan_beat[m]; //取节拍
a=yinfu[2*c-2];
b=yinfu[2*c-1];
EA=1;
while(s--)
{
delay1();
P0=~P0;
P2=~P2;
}
m++;
if(m>=48) return; //数值是shengri相关表中的元素数量
}
}
}
/*以下为N种流水灯流动花式*/
void turn()//流水灯顺时针走动（5次）
{
for(num1=0;num1<8;num1++)
{
for(num=0;num<8;num++)
{
P0=ledtable[num];
delay(30);//时间暂定
}
P0=0xff;//之后关闭P1组
for(num=7;num>-1;num--)
{
P2=ledtable2[num];
delay(30);
}
P2=0xff;//之后关闭P2组
}
}
void back()//逆时针流动
{
for(num1=0;num1<8;num1++)
{
for(num=0;num<8;num++)
{
P2=ledtable[num];
delay(30);
}
P2=0xff;
for(num=7;num>-1;num--)
{
P0=ledtable2[num];
delay(30);
}
P0=0xff;
}
}
void qianhou()//前后来回
……………………
…………限于本文篇幅余下代码请从51黑下载附件…………

复制代码