目录

一、蜂鸣器介绍二、驱动电路2.1 三极管驱动2.2 集成电路驱动 三、蜂鸣器播放音乐3.1 键盘与音符对照3.2 音符与频率对照 四、孤勇者乐谱五、代码演示
前面学习了MCU-51：单片机蜂鸣器播放音乐和提示音
我们知道了可以用51单片机播放乐谱
今天我们用51单片机播放 孤勇者
爱你孤身走暗巷

爱你不跪的模样

爱你对峙过绝望

不肯哭一场

爱你破烂的衣裳

却敢堵命运的枪

爱你和我那么像

缺口都一样

去吗 配吗 这褴褛的披风

战吗 战啊 以最卑微的梦
…
下面我们再来回顾下蜂鸣器知识

一、蜂鸣器介绍

蜂鸣器是一种将电信号转换为声音信号的器件，常用来产生设备的按键音、报警音等提示信号
蜂鸣器按驱动方式可分为有源蜂鸣器和无源蜂鸣器
有源蜂鸣器：内部自带振荡源，将正负极接上直流电压即可持续发声，频率固定
无源蜂鸣器：内部不带振荡源，需要控制器提供振荡脉冲才可发声，调整提供振荡脉冲的频率，可发出不同频率的声音

二、驱动电路

2.1 三极管驱动

2.2 集成电路驱动

三、蜂鸣器播放音乐

3.1 键盘与音符对照

3.2 音符与频率对照

四、孤勇者乐谱

五、代码演示

#include <REG52.H>    #include <INTRINS.H>   sbit speaker=P2^5; unsigned char timer0h,timer0l,time=1;// 孤勇者，3分30秒，原唱4分16秒code unsigned char gyz[]={122,27,121,26,122,27,121,26,122,27,121,26,120,// 音高（低音0，中音1，高音2），音长（节拍），音调（do,le,mi,fa,so,la,si）143,140,110,111,112,111,143,130,111,112,111,112,113,36,111,36,111,36,111,122,121,47,140,//都，是勇敢的，你额头的伤口你的不同你犯的错143,140,111,112,111,143,140,111,112,111,112,113,36,111,36,111,36,111,123,122,47,140,//都，不必隐藏，你破旧的玩偶你的面具你的自我16,111,136,116,116,115,126,116,115,116,115,116,115,143,140,16,111,136,116,116,115,116,115,137,117,117,116,127,126,143,//他们说要带着光驯服每一头怪兽，他们说要缝好你的伤没有人爱小丑120,113,115,113,132,113,132,113,132,113,115,113,115,113,132,113,132,113,142,120,111,112,123,26,121,123,132,113,112,121,46,140,//为何孤独不可光荣，人只有不完美值得歌颂，谁说污泥满身的不算英雄116,117,211,212,117,211,221,211,117,211,212,117,211,221,211,212,213,212,213,212,223,213,212,223,225,223,//爱你孤身走暗巷，爱你不跪的模样，爱你对峙过绝望，不肯哭一场，116,117,211,212,117,211,221,211,117,211,212,117,211,221,211,212,213,212,213,212,223,213,212,223,225,223,225,//爱你破烂的衣裳却敢堵命运的枪，爱你和我那么像缺口都一样233,215,233,215,213,215,216,213,225,225,233,215,233,215,//去吗，配吗，这褴褛的披风，战吗，战啊，213,215,216,213,225,215,215,213,222,222,211,223,232,222,221,146,140,215,215,213,222,222,211,233,222,222,221,146,140,140,//以最卑微的梦，致那黑夜中的呜咽与怒吼(hou)，谁说站在光里的才算英雄116,115,136,115,116,115,116,115,126,116,115,116,115,116,115,143,140,116,115,136,115,116,115,116,115,137,117,117,116,117,116,143,140,//他们说要戒了你的狂就像擦掉了污垢(gou)，他们说要拾台阶而上而代价是低头113,115,113,132,113,132,113,132,113,115,113,115,113,132,113,132,113,142,120,111,112,123,126,221,223,232,213,212,231,166,120,//那就让我不可乘风，你一样骄傲着那种孤勇，谁说对弈平凡的不算英雄116,117,211,212,117,211,221,211,117,211,212,117,211,221,211,212,213,212,213,212,223,213,212,223,225,223,//爱你孤身走暗巷，爱你不跪的模样，爱你对峙过绝望，不肯哭一场，116,117,211,212,117,211,221,211,117,211,212,117,211,221,211,212,213,212,213,212,223,213,212,223,225,223,225,//爱你破烂的衣裳却敢堵命运的枪，爱你和我那么像缺口都一样233,215,233,215,213,215,216,213,225,225,233,215,233,215,//去吗，配吗，这褴褛的披风，战吗，战啊，213,215,216,213,225,215,215,213,222,222,211,223,232,222,221,146,140,215,215,213,222,222,211,233,222,222,221,146,140,140,//以最卑微的梦，致那黑夜中的呜咽与怒吼(hou)，谁说站在光里的才算英雄26,121,123,147,127,117,127,186,120,26,121,123,147,127,117,127,186,120,//你的斑驳与众不同，你的沉默震耳欲聋116,117,211,212,117,211,221,211,117,211,212,117,211,221,211,212,213,212,213,212,223,213,212,223,225,223,//爱你孤身走暗巷，爱你不跪的模样，爱你对峙过绝望，不肯哭一场，116,117,211,212,117,211,221,211,117,211,212,117,211,221,211,212,213,212,213,212,223,213,212,223,225,223,225,//爱你来自于蛮荒，一生不借谁的光，你将造你的城邦，在废墟之上233,215,233,215,213,215,216,213,225,225,233,215,233,215,//去吗，去啊，以最卑微的梦，战吗，战啊，213,215,216,213,225,215,215,213,222,222,211,223,232,222,221,146,140,215,215,213,222,222,211,233,222,222,221,146,140,140,//以最孤高的梦，致那黑夜中的呜咽与怒吼(hou)，谁说站在光里的才算英雄0 };// 定时时间越短，那么声音频率越高，code unsigned char FREQH[]={0xF2,0xF3,0xF5,0xF5,0xF6,0xF7,0xF8,0xF9,0xF9,0xFA,0xFA,0xFB,0xFB,0xFC,0xFC,0xFC,0xFD,0xFD,0xFD,0xFD,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFF,} ;code unsigned char FREQL[]={0x42,0xC1,0x17,0xB6,0xD0,0xD1,0xB6,0x21,0xE1,0x8C,0xD8,0x68,0xE9,0x5B,0x8F,0xEE,0x44,0x6B,0xB4,0xF4,0x2D,0x47,0x77,0xA2,0xB6,0xDA,0xFA,0x16,};//做成对应的频率表，其实前几个很少遇得到，那么这里再缩减的话，//就除以10，就可以用char类型而不用int类型了，后边计算计时时间的时候再乘10补回unsigned int  code FreTab[28]  = {3517,3134,2792,2633,2351,2094,1865,1758,1566,1395,1319,1175,1046,932 ,880 ,785 ,699 ,660 ,587 ,523 ,466 ,440 ,392 ,349 ,329 ,293 ,261 ,233 ,  };void t0int() interrupt 1{speaker=!speaker;TH0=timer0h;TL0=timer0l;}//  节奏的快慢，这里是半个节拍的时间void delay(unsigned char t){unsigned long t2;for(;t>0;t--){for(t2=0;t2<5000;t2++){;}}TR0=0;// 停止发音如果屏蔽掉，会出现连音的不正常现象}/**/void song(){unsigned char k=0;unsigned long i=0;//  由于歌词长度问题，需要设置大一点的范围，否则还没唱完一遍又重新开始了// 这里这样做就只唱一遍，寻到最后的0值时就停止了while(time){if(gyz[i]%10==0)  // 音调为0值时停顿处理{TR0=0;  // 停止发音}else{k=gyz[i]%10+7*(gyz[i]/100+1)-1;timer0h=FREQH[k];// 这里将K值改成定值，发现实际上并不是按照do,le,mi,fa,so,la,si这样发音timer0l=FREQL[k];//如果用频率表输出的话，就屏蔽上两句，开启下两句//timer0h=(65535-FreTab[k])/256;//timer0l=(65535-FreTab[k])%256;TR0=1;  // 启动T0输出方波去发音}time=gyz[i]/10%10;i=i+1;delay(time);}}void main(void){TMOD=1;// 设置定时器0为16位计数模式 EA=1;ET0=1;// 开定时器0中断while(1){song();}}