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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(lè)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(kāi)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(kāi)
- ET0=1; //定時(shí)器中斷打開(kāi)
- }
- //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(zhǎng)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(zhǎng)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(lè)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(zhǎng)
- i=i+3;
- if(P1!=0xff)//長(zhǎng)按任意8音鍵退出播放
- {
- delayms(10);
- if(P1!=0xff)
- i=101;
- }
- PlaySong();
- }
- TR0=0;
- }
- }
- }
- }
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基于51單片機(jī)和Proteus仿真的簡(jiǎn)易電子琴.zip
(57.99 KB, 下載次數(shù): 133)
2019-5-9 17:14 上傳
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