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#include<AT89X52.h>
#define KeyPort P1
unsigned char High,Low; //定時(shí)器預(yù)裝值的高8位和低8位
sbit SPK=P3^7; //定義蜂鳴器接口
sbit playSongKey=P0^0; //功能鍵
sbit RS=P2^0;//液晶數(shù)據(jù)命令選擇
sbit RW=P2^1;//液晶讀寫選擇
sbit EN=P2^2;//液晶使能端
unsigned char code freq[][2]={
0xD8,0xF7,//00440HZ 1
0xBD,0xF8,//00494HZ 2
0x87,0xF9,//00554HZ 3
0xE4,0xF9,//00587HZ 4
0x90,0xFA,//00659HZ 5
0x29,0xFB,//00740HZ 6
0xB1,0xFB,//00831HZ 7
0xEF,0xFB,//00880HZ `1
};
unsigned char Time;
unsigned char code YINFU[9][1]={{' '},{'1'},{'2'},{'3'},{'4'},{'5'},{'6'},{'7'},{'8'}};
//世上只有媽媽好數(shù)據(jù)表
unsigned char code MUSIC[]={ 6,2,3, 5,2,1, 3,2,2, 5,2,2, 1,3,2, 6,2,1, 5,2,1,
6,2,4, 3,2,2, 5,2,1, 6,2,1, 5,2,2, 3,2,2, 1,2,1,
6,1,1, 5,2,1, 3,2,1, 2,2,4, 2,2,3, 3,2,1, 5,2,2,
5,2,1, 6,2,1, 3,2,2, 2,2,2, 1,2,4, 5,2,3, 3,2,1,
2,2,1, 1,2,1, 6,1,1, 1,2,1, 5,1,6, 0,0,0
};
// 音階頻率表高八位
unsigned char code FREQH[]={
0xF2,0xF3,0xF5,0xF5,0xF6,0xF7,0xF8,
0xF9,0xF9,0xFA,0xFA,0xFB,0xFB,0xFC,0xFC, //1,2,3,4,5,6,7,8,i
0xFC,0xFD,0xFD,0xFD,0xFD,0xFE,
0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFF,
} ;
// 音階頻率表低八位
unsigned char code FREQL[]={
0x42,0xC1,0x17,0xB6,0xD0,0xD1,0xB6,
0x21,0xE1,0x8C,0xD8,0x68,0xE9,0x5B,0x8F, //1,2,3,4,5,6,7,8,i
0xEE,0x44, 0x6B,0xB4,0xF4,0x2D,
0x47,0x77,0xA2,0xB6,0xDA,0xFA,0x16,
};
void Init_Timer0(void);//定時(shí)器初始化
//延時(shí)函數(shù)大約約2*z+5us
void delay2xus(unsigned char z)
{
while(z--);
}
// 延時(shí)函數(shù)大約約1ms
void delayms(unsigned char x)
{
while(x--)
{
delay2xus(245);
delay2xus(245);
}
}
/*------------------------------------------------
節(jié)拍延時(shí)函數(shù)
各調(diào)1/4節(jié)拍時(shí)間：
調(diào)4/4 125ms
調(diào)2/4 250ms
調(diào)3/4 187ms
------------------------------------------------*/
void delayTips(unsigned char t)
{
unsigned char i;
for(i=0;i<t;i++)
{
delayms(250);
}
TR0=0;
}
//播放音樂的函數(shù)
void PlaySong()
{
TH0=High;//賦值定時(shí)器時(shí)間，決定頻率
TL0=Low;
TR0=1; //打開定時(shí)器
delayTips(Time); //延時(shí)所需要的節(jié)拍
}
//定時(shí)器T0初始化子程序
void Init_Timer0(void)
{
TMOD |= 0x01; //使用模式1，16位定時(shí)器，使用"|"符號(hào)可以在使用多個(gè)定時(shí)器時(shí)不受影響
EA=1; //總中斷打開
ET0=1; //定時(shí)器中斷打開
}
//定時(shí)器T0中斷子程序
void Timer0_isr(void) interrupt 1
{
TH0=High;
TL0=Low;
SPK=!SPK;
}
//主函數(shù)
void main (void)
{
unsigned char num,k,i;
Init_Timer0(); //初始化定時(shí)器0，主要用于數(shù)碼管動(dòng)態(tài)掃描
SPK=0; //在未按鍵時(shí)，喇叭低電平，防止長期高電平損壞喇叭
while (1)
{
switch(KeyPort) //對(duì)按鍵進(jìn)行處理
{
case 0xfe:num= 1;break;
case 0xfd:num= 2;break;
case 0xfb:num= 3;break;
case 0xf7:num= 4;break;
case 0xef:num= 5;break;
case 0xdf:num= 6;break;
case 0xbf:num= 7;break;
case 0x7f:num= 8;break; //分別對(duì)應(yīng)不用的音調(diào)
default:num= 0;break;
}
P2 = KeyPort;
if(num==0)
{
TR0=0;
SPK=0; //在未按鍵時(shí)，喇叭低電平，防止長期高電平損壞喇叭
}
else
{
High=freq[num-1][1];
Low =freq[num-1][0];
TR0=1;
}
if(playSongKey==0) //如果播放音樂按鍵被按下
{
delayms(10);
if(playSongKey==0)
{
i=0;
while(i<100)
{
k=MUSIC[i]+7*MUSIC[i+1]-1;//去音符振蕩頻率所需數(shù)據(jù)
High=FREQH[k];
Low=FREQL[k];
Time=MUSIC[i+2]; //節(jié)拍時(shí)長
i=i+3;
if(P1!=0xff)//長按任意8音鍵退出播放
{
delayms(10);
if(P1!=0xff)
i=101;
}
PlaySong();
}
TR0=0;
}
}
}
}

復(fù)制代碼