Arduino-BuzzerModule

Buzzer Module

参数

工作电压：3.3-5V

介绍：电磁式无源蜂鸣器，2K±5K方波驱动。

使用

接线

模块	Arduino
GND	(Power) GND
VCC	(Power) 3.3 / 5V
I/O	(Digital PWM(~)) *

程序

动态内存优化方法

使用全局变量储存歌曲音符和时值，会造成动态内存占用率高，可能出现稳定性问题。

已掌握的解决方案有两种：

1. 需要使用的时候用 new 动态分配内存，为每一个音符赋和时值赋值，用完后及时释放内存。

   int *tune = new int[n];
   float *duration = new float[n];
   
   delete[] tune;
   delete[] duration;

2. 这个静态数组放在MCU的FLASHROM中，而不存在RAM里。

   #include <avr/pgmspace.h>
   const int tune[] PROGMEM = {.......};
   # PROGMEM 就是将数组放入闪存中
   pgm_read_byte(&tune[n]);
   # 读取数组

   但是在国内版的UNO上表现极不稳定，因此在本项目中不采用这个修改较简便的方法。

//天空之城，共 156 个音符，pin = 9
#define NOTE_D0 -1 
#define NOTE_D1 294 
#define NOTE_D2 330 
#define NOTE_D3 350 
#define NOTE_D4 393 
#define NOTE_D5 441 
#define NOTE_D6 495 
#define NOTE_D7 556 

#define NOTE_DL1 147 
#define NOTE_DL2 165 
#define NOTE_DL3 175 
#define NOTE_DL4 196 
#define NOTE_DL5 221 
#define NOTE_DL6 248 
#define NOTE_DL7 278 

#define NOTE_DH1 589 
#define NOTE_DH2 661 
#define NOTE_DH3 700 
#define NOTE_DH4 786 
#define NOTE_DH5 882 
#define NOTE_DH6 990 
#define NOTE_DH7 112  
//以上部分是定义是把每个音符和频率值对应起来

#define WHOLE 1 
#define HALF 0.5 
#define QUARTER 0.25 
#define EIGHTH 0.25 
#define SIXTEENTH 0.625  
//用英文对应了拍子


/*
** 一般用作全局变量，但是歌曲多的时候会造成动态内存占用过高，程序不稳定。
** 这时需要使用动态分配内存，再赋值，语句放入函数中。
int tune[] =  
{  
 NOTE_D0,NOTE_D0,NOTE_D0,NOTE_D6,NOTE_D7,  NOTE_DH1,NOTE_D7,NOTE_DH1,NOTE_DH3,NOTE_D7,
 NOTE_D7,NOTE_D7,NOTE_D3,NOTE_D3,NOTE_D6,  NOTE_D5,NOTE_D6,NOTE_DH1,NOTE_D5,NOTE_D5,
 NOTE_D5,NOTE_D3,NOTE_D4,NOTE_D3,NOTE_D4,  NOTE_DH1,NOTE_D3,NOTE_D3,NOTE_D0,NOTE_DH1,
 NOTE_DH1,NOTE_DH1,NOTE_D7,NOTE_D4,NOTE_D4,  NOTE_D7,NOTE_D7,NOTE_D7,NOTE_D0,NOTE_D6,
 NOTE_D7,NOTE_DH1,NOTE_D7,NOTE_DH1,NOTE_DH3,  NOTE_D7,NOTE_D7,NOTE_D7,NOTE_D3,NOTE_D3,
 NOTE_D6,NOTE_D5,NOTE_D6,NOTE_DH1,NOTE_D5,  NOTE_D5,NOTE_D5,NOTE_D2,NOTE_D3,NOTE_D4,
 NOTE_DH1,NOTE_D7,NOTE_D7,NOTE_DH1,NOTE_DH1,  NOTE_DH2,NOTE_DH2,NOTE_DH3,NOTE_DH1,NOTE_DH1,
 NOTE_DH1,NOTE_DH1,NOTE_D7,NOTE_D6,NOTE_D6,  NOTE_D7,NOTE_D5,NOTE_D6,NOTE_D6,NOTE_D6,
 NOTE_DH1,NOTE_DH2,NOTE_DH3,NOTE_DH2,NOTE_DH3,  NOTE_DH5,NOTE_DH2,NOTE_DH2,NOTE_DH2,NOTE_D5,
 NOTE_D5,NOTE_DH1,NOTE_D7,NOTE_DH1,NOTE_DH3,  NOTE_DH3,NOTE_DH3,NOTE_DH3,NOTE_DH3,NOTE_D6,
 NOTE_D7,NOTE_DH1,NOTE_D7,NOTE_DH2,NOTE_DH2,  NOTE_DH1,NOTE_D5,NOTE_D5,NOTE_D5,NOTE_DH4,
 NOTE_DH3,NOTE_DH2,NOTE_DH1,NOTE_DH3,NOTE_DH3,  NOTE_DH3,NOTE_DH3,NOTE_DH6,NOTE_DH6,NOTE_DH5,
 NOTE_DH5,NOTE_DH3,NOTE_DH2,NOTE_DH1,NOTE_DH1,  NOTE_D0,NOTE_DH1,NOTE_DH2,NOTE_DH1,NOTE_DH2,
 NOTE_DH2,NOTE_DH5,NOTE_DH3,NOTE_DH3,NOTE_DH3,  NOTE_DH3,NOTE_DH6,NOTE_DH6,NOTE_DH5,NOTE_DH5,
 NOTE_DH3,NOTE_DH2,NOTE_DH1,NOTE_DH1,NOTE_D0,  NOTE_DH1,NOTE_DH2,NOTE_DH1,NOTE_DH2,NOTE_DH2,
 NOTE_D7,NOTE_D6,NOTE_D6,NOTE_D6,NOTE_D6,  NOTE_D7
};
// 音符部分

float duration[]= 

{  
  1,1,1,0.5,0.5,     1+0.5,0.5,1,1,     1,1,1,0.5,0.5,
  1+0.5,0.5,1,1,     1,1,1,1,          1+0.5,0.5,1,1, 
  1,1,0.5,0.5,0.5,0.5,    1+0.5,0.5,1,1,     1,1,1,0.5,0.5,
  1+0.5,0.5,1,1,    1,1,1,0.5,0.5,     1+0.5,0.5,1,1,
  1,1,1,0.5,0.5,    1,0.5,0.25,0.25,0.25,0.5,    0.5,0.5,0.5,0.25,0.5,1,
  0.5,0.5,0.5,0.5,1,1,    1,1,1,0.5,0.5,    1+0.5,0.5,1,1,
  1,1,1,0.5,0.5,    1.5,0.5,1,1,    1,1,1,1,
  0.5,0.5,1,1,0.5,0.5,    1.5,0.25,0.5,1,    1,1,1,1,
  1,1,1,1,    1,1,1,1,    0.5,0.5,1,1,0.5,0.5,
  1,0.5,0.5,1,1,    1,1,1,1,    1,1,1,1,
  0.5,0.5,1,1,0.5,0.5,    1,0.5,0.25,0.5,1,    1,1,1,0.5,0.5
};
// 音符时值节拍部分
*/

int tonePin = 7; // 蜂鸣器的 pin 

void setup() 

{
  Serial.begin(9600);
  pinMode(tonePin, OUTPUT); // 设置蜂鸣器的pin为输出模式
  Serial.println("Buzzer Test");
} 

void loop() 

{
  // 音符部分
  int *tune = new int[156];
  tune[0]=tune[1]=tune[2]=NOTE_D0; tune[3]=NOTE_D6; tune[4]=NOTE_D7; tune[5]=NOTE_DH1; tune[6]=NOTE_D7; tune[7]=NOTE_DH1; tune[8]=NOTE_DH3;
  tune[9]=tune[10]=tune[11]=NOTE_D7; tune[12]=tune[13]=NOTE_D3; tune[14]=NOTE_D6; tune[15]=NOTE_D5; tune[16]=NOTE_D6;tune[17]=NOTE_D1; 
  tune[18]=tune[19]=tune[20]=NOTE_D5; tune[21]=NOTE_D3; tune[22]=NOTE_D4; tune[23]=NOTE_D3; tune[24]=NOTE_D4; 
  tune[25]=NOTE_DH1; tune[26]=tune[27]=NOTE_D3; tune[28]=NOTE_D0; tune[29]=tune[30]=tune[31]=NOTE_DH1; tune[32]=NOTE_D7; tune[33]=tune[34]=NOTE_D4; 
  tune[35]=tune[36]=tune[37]=NOTE_D7; tune[38]=NOTE_D0; tune[39]=NOTE_D6; tune[40]=NOTE_D7; tune[41]=NOTE_DH1; tune[42]=NOTE_D7; tune[43]=NOTE_DH1; tune[44]=NOTE_DH3; 
  tune[45]=tune[46]=tune[47]=NOTE_D7; tune[48]=tune[49]=NOTE_D3; tune[50]=NOTE_D6; tune[51]=NOTE_D5; tune[52]=NOTE_D6; tune[53]=NOTE_DH1; 
  tune[54]=tune[55]=tune[56]=NOTE_D5; tune[57]=NOTE_D2; tune[58]=NOTE_D3; tune[59]=NOTE_D4; tune[60]=NOTE_DH1; tune[61]=tune[62]=NOTE_D7;
  tune[63]=tune[64]=NOTE_DH1; tune[65]=tune[66]=NOTE_DH2; tune[67]=NOTE_DH3; tune[68]=tune[69]=tune[70]=NOTE_DH1; 
  tune[71]=NOTE_DH1; tune[72]=NOTE_D7; tune[73]=tune[74]=NOTE_D6; tune[75]=NOTE_D7; tune[76]=NOTE_D5; tune[77]=tune[78]=tune[79]=NOTE_D6;
  tune[80]=NOTE_DH1; tune[81]=NOTE_DH2; tune[82]=NOTE_DH3; tune[83]=NOTE_DH2; tune[84]=NOTE_DH3; tune[85]=NOTE_DH5; 
  tune[86]=tune[87]=tune[88]=NOTE_DH2; tune[89]=tune[90]=NOTE_D5; tune[91]=NOTE_DH1; tune[92]=NOTE_D7; tune[93]=NOTE_DH1; 
  tune[94]=tune[95]=tune[96]=tune[97]=tune[98]=NOTE_DH3; tune[99]=NOTE_D6; tune[100]=NOTE_D7; 
  tune[101]=NOTE_DH1; tune[102]=NOTE_D7; tune[103]=tune[104]=NOTE_DH2; tune[105]=NOTE_DH1; tune[106]=tune[107]=tune[108]=NOTE_D5; 
  tune[109]=NOTE_DH4; tune[110]=NOTE_DH3; tune[111]=NOTE_DH2; tune[112]=NOTE_DH1; tune[113]=tune[114]=tune[115]=tune[116]=NOTE_DH3; 
  tune[117]=tune[118]=NOTE_DH6; tune[119]=tune[120]=NOTE_DH5; tune[121]=NOTE_DH3; tune[122]=NOTE_DH2; tune[123]=tune[124]=NOTE_DH1; 
  tune[125]=NOTE_D0; tune[126]=NOTE_DH1; tune[127]=NOTE_DH2; tune[128]=NOTE_DH1; tune[129]=tune[130]=NOTE_DH2; 
  tune[131]=NOTE_DH5; tune[132]=tune[133]=tune[134]=tune[135]=NOTE_DH3; tune[136]=tune[137]=NOTE_DH6; tune[138]=tune[139]=NOTE_DH5; 
  tune[140]=NOTE_DH3; tune[141]=NOTE_DH2; tune[142]=tune[143]=NOTE_DH1; tune[144]=NOTE_D0; tune[145]=NOTE_DH1; tune[146]=NOTE_DH2; 
  tune[147]=NOTE_DH1; tune[148]=tune[149]=NOTE_DH2; tune[150]=NOTE_D7; tune[151]=tune[152]=tune[153]=tune[154]=NOTE_D6; tune[155]=NOTE_D7;

  // 音符时值部分
  float *duration = new float[156];
  duration[0]=duration[1]=duration[2]=1; duration[3]=duration[4]=0.5;
  duration[5]=1.5; duration[6]=0.5; duration[7]=duration[8]=duration[9]=duration[10]=duration[11]=1; duration[12]=duration[13]=0.5;
  duration[14]=1.5; duration[15]=0.5; duration[16]=duration[17]=duration[18]=duration[19]=duration[20]=duration[21]=1;
  duration[22]=1.5; duration[23]=0.5; duration[24]=duration[25]=duration[26]=duration[27]=1; 
  duration[28]=duration[29]=duration[30]=duration[31]=0.5; duration[32]=1.5; duration[33]=0.5; 
  duration[34]=duration[35]=duration[36]=duration[37]=duration[38]=1; duration[39]=duration[40]=0.5;
  duration[41]=1.5; duration[42]=0.5; duration[43]=duration[44]=duration[45]=duration[46]=duration[47]=1;
  duration[48]=duration[49]=0.5; duration[50]=1.5; duration[51]=0.5; duration[52]=duration[53]=duration[54]=duration[55]=duration[56]=1;
  duration[57]=duration[58]=0.5; duration[59]=1; duration[60]=0.5; duration[61]=duration[62]=duration[63]=0.25;
  duration[64]=duration[65]=duration[66]=duration[67]=0.5; duration[68]=0.25; duration[69]=0.5; duration[70]=1;
  duration[71]=duration[72]=duration[73]=duration[74]=0.5; duration[75]=duration[76]=duration[77]=duration[78]=duration[79]=1;
  duration[80]=duration[81]=0.5; duration[82]=1.5; duration[83]=0.5; duration[84]=duration[85]=duration[86]=duration[87]=duration[88]=1;
  duration[89]=duration[90]=0.5; duration[91]=1.5; duration[92]=0.5; 
  duration[93]=duration[94]=duration[95]=duration[96]=duration[97]=duration[98]=1; duration[99]=duration[100]=0.5;
  duration[101]=duration[102]=1; duration[103]=duration[104]=0.5; duration[105]=1.5; duration[106]=0.25; duration[107]=0.5;
  duration[108]=duration[109]=duration[110]=duration[111]=duration[112]=1;
  duration[113]=duration[114]=duration[115]=duration[116]=duration[117]=duration[118]=duration[119]=duration[120]=1;
  duration[121]=duration[122]=0.5; duration[123]=duration[124]=1; duration[125]=duration[126]=0.5; duration[127]=1;
  duration[128]=duration[129]=0.5; duration[130]=duration[131]=duration[132]=duration[133]=duration[134]=duration[135]=1;
  duration[136]=duration[137]=duration[138]=duration[139]=1; duration[140]=duration[141]=0.5; duration[142]=duration[143]=1;
  duration[144]=duration[145]=0.5; duration[146]=1; duration[147]=0.5; duration[148]=0.25; duration[149]=0.5;
  duration[150]=duration[151]=duration[152]=duration[153]=1; duration[154]=duration[155]=0.5;
  
  for(int x=0; x<156; x++) // 循环每个音符
  {  
    tone(tonePin,tune[x]); // 此函数依次播放每个音符
    delay(400 * duration[x]); // 每个音符持续的时间
    noTone(tonePin); // 停止当前音符，进入下一音符
  }
  delete[] tune;
  delete[] duration;
  delay(5000); // 等待5秒后，重新开始播放
}

内存优化

即在需要使用时动态分配内存，为每一个音符和音符时值赋值，用完后及时释放。

不使用内存优化，动态内存占用率可达 85%，使用后在编译时算出的动态内存占用率仅为 15%。当然，若使用时一股脑全部分配空寂爱你，也会达到 85%，甚至更高。

void Musics()
{
  Serial.println("Music Load Begin:");

  //----------------------------------------------------------------------------------
  int m = random(0, 4);                //随机生成0，1，2，3五个数，用于选歌
  Serial.println(m);
  int length1 = 80; //《潮鸣》长度
  int length2 = 156;   //《天空之城》长度
  int length3 = 25; //《祝你生日快乐》长度
  if (m == 0)                          // m = 0，潮鸣
  {
    //-------------------------------潮鸣-------------------------------------
    // 音符
    int *tune1 = new int[80];
    tune1[0]=G; tune1[1]=A; tune1[2]=EE; tune1[3]=A; tune1[4]=G; tune1[5]=A; tune1[6]=G; tune1[7]=A; tune1[8]=EE; tune1[9]=A; tune1[10]=G;
    tune1[11]=A; tune1[12]=EE; tune1[13]=A; tune1[14]=G; tune1[15]=A; tune1[16]=E;
    tune1[17]=G; tune1[18]=D; tune1[19]=E; tune1[20]=G; tune1[21]=A; tune1[22]=B;
    tune1[23]=A; tune1[24]=EE; tune1[25]=A; tune1[26]=G; tune1[27]=A; tune1[28]=G;
    tune1[29]=A; tune1[30]=EE; tune1[31]=B; tune1[32]=CC; tune1[33]=B; tune1[34]=CC; tune1[35]=B; tune1[36]=A; tune1[37]=E;
    tune1[38]=D; tune1[39]=E; tune1[40]=G; tune1[41]=A; tune1[42]=B; tune1[43]=A; tune1[44]=EE; tune1[45]=A; tune1[46]=G; tune1[47]=A;
    tune1[48]=G; tune1[49]=A; tune1[50]=EE; tune1[51]=A; tune1[52]=G; tune1[53]=A; tune1[54]=EE; tune1[55]=A; tune1[56]=G; tune1[57]=A;
    tune1[58]=E; tune1[59]=G; tune1[60]=D; tune1[61]=E; tune1[62]=G; tune1[63]=A; tune1[64]=B; tune1[65]=A; tune1[66]=EE; tune1[67]=A; tune1[68]=G; tune1[69]=A;
    tune1[70]=G; tune1[71]=A; tune1[72]=EE; tune1[73]=B; tune1[74]=CC; tune1[75]=B; tune1[76]=CC; tune1[77]=DD; tune1[78]=EE; tune1[79]=AA;
    // 音符时值
    float *duration1 = new float[80];
    duration1[0]=2; duration1[1]=duration1[2]=duration1[3]=duration1[4]=1; duration1[5]=7; duration1[6]=duration1[7]=duration1[8]=duration1[9]=duration1[10]=1;
    duration1[11]=duration1[12]=duration1[13]=duration1[14]=1; duration1[15]=3; duration1[16]=1;
    duration1[17]=3; duration1[18]=duration1[19]=duration1[20]=duration1[21]=duration1[22]=1;
    duration1[23]=duration1[24]=duration1[25]=duration1[26]=1; duration1[27]=7; duration1[28]=1;
    duration1[29]=duration1[30]=duration1[31]=duration1[32]=duration1[33]=duration1[34]=duration1[35]=duration1[36]=1; duration1[37]=6;
    duration1[38]=duration1[39]=duration1[40]=duration1[41]=duration1[42]=duration1[43]=duration1[44]=duration1[45]=duration1[46]=1; duration1[47]=7;
    duration1[48]=duration1[49]=duration1[50]=duration1[51]=duration1[52]=duration1[53]=duration1[54]=duration1[55]=duration1[56]=1; duration1[57]=3;
    duration1[58]=1; duration1[59]=3; duration1[60]=duration1[61]=duration1[62]=duration1[63]=duration1[64]=duration1[65]=duration1[66]=duration1[67]=duration1[68]=1; duration1[69]=7;
    duration1[70]=duration1[71]=duration1[72]=duration1[73]=duration1[74]=duration1[75]=duration1[76]=duration1[77]=duration1[78]=1; duration1[79]=4;
    Serial.println("1st Finished");
    for (int i = 0; i < length1; i++)
    {
      tone(Buzzer, tune1[i]);
      delay(250 * duration1[i]);
      noTone(Buzzer);
      delay(100);
    }
    delay(3000);                        //音乐结束，安静3s
    delete[] tune1;
    delete[] duration1;
  }
  else if (m == 1)                      // m = 1，天空之城
  {
    //------------------------------天空之城------------------------------------
    // 音符部分
    int *tune2 = new int[156];
    tune2[0]=tune2[1]=tune2[2]=NOTE_D0; tune2[3]=NOTE_D6; tune2[4]=NOTE_D7; tune2[5]=NOTE_DH1; tune2[6]=NOTE_D7; tune2[7]=NOTE_DH1; tune2[8]=NOTE_DH3;
    tune2[9]=tune2[10]=tune2[11]=NOTE_D7; tune2[12]=tune2[13]=NOTE_D3; tune2[14]=NOTE_D6; tune2[15]=NOTE_D5; tune2[16]=NOTE_D6;tune2[17]=NOTE_D1; 
    tune2[18]=tune2[19]=tune2[20]=NOTE_D5; tune2[21]=NOTE_D3; tune2[22]=NOTE_D4; tune2[23]=NOTE_D3; tune2[24]=NOTE_D4; 
    tune2[25]=NOTE_DH1; tune2[26]=tune2[27]=NOTE_D3; tune2[28]=NOTE_D0; tune2[29]=tune2[30]=tune2[31]=NOTE_DH1; tune2[32]=NOTE_D7; tune2[33]=tune2[34]=NOTE_D4; 
    tune2[35]=tune2[36]=tune2[37]=NOTE_D7; tune2[38]=NOTE_D0; tune2[39]=NOTE_D6; tune2[40]=NOTE_D7; tune2[41]=NOTE_DH1; tune2[42]=NOTE_D7; tune2[43]=NOTE_DH1; tune2[44]=NOTE_DH3; 
    tune2[45]=tune2[46]=tune2[47]=NOTE_D7; tune2[48]=tune2[49]=NOTE_D3; tune2[50]=NOTE_D6; tune2[51]=NOTE_D5; tune2[52]=NOTE_D6; tune2[53]=NOTE_DH1; 
    tune2[54]=tune2[55]=tune2[56]=NOTE_D5; tune2[57]=NOTE_D2; tune2[58]=NOTE_D3; tune2[59]=NOTE_D4; tune2[60]=NOTE_DH1; tune2[61]=tune2[62]=NOTE_D7;
    tune2[63]=tune2[64]=NOTE_DH1; tune2[65]=tune2[66]=NOTE_DH2; tune2[67]=NOTE_DH3; tune2[68]=tune2[69]=tune2[70]=NOTE_DH1; 
    tune2[71]=NOTE_DH1; tune2[72]=NOTE_D7; tune2[73]=tune2[74]=NOTE_D6; tune2[75]=NOTE_D7; tune2[76]=NOTE_D5; tune2[77]=tune2[78]=tune2[79]=NOTE_D6;
    tune2[80]=NOTE_DH1; tune2[81]=NOTE_DH2; tune2[82]=NOTE_DH3; tune2[83]=NOTE_DH2; tune2[84]=NOTE_DH3; tune2[85]=NOTE_DH5; 
    tune2[86]=tune2[87]=tune2[88]=NOTE_DH2; tune2[89]=tune2[90]=NOTE_D5; tune2[91]=NOTE_DH1; tune2[92]=NOTE_D7; tune2[93]=NOTE_DH1; 
    tune2[94]=tune2[95]=tune2[96]=tune2[97]=tune2[98]=NOTE_DH3; tune2[99]=NOTE_D6; tune2[100]=NOTE_D7; 
    tune2[101]=NOTE_DH1; tune2[102]=NOTE_D7; tune2[103]=tune2[104]=NOTE_DH2; tune2[105]=NOTE_DH1; tune2[106]=tune2[107]=tune2[108]=NOTE_D5; 
    tune2[109]=NOTE_DH4; tune2[110]=NOTE_DH3; tune2[111]=NOTE_DH2; tune2[112]=NOTE_DH1; tune2[113]=tune2[114]=tune2[115]=tune2[116]=NOTE_DH3; 
    tune2[117]=tune2[118]=NOTE_DH6; tune2[119]=tune2[120]=NOTE_DH5; tune2[121]=NOTE_DH3; tune2[122]=NOTE_DH2; tune2[123]=tune2[124]=NOTE_DH1; 
    tune2[125]=NOTE_D0; tune2[126]=NOTE_DH1; tune2[127]=NOTE_DH2; tune2[128]=NOTE_DH1; tune2[129]=tune2[130]=NOTE_DH2; 
    tune2[131]=NOTE_DH5; tune2[132]=tune2[133]=tune2[134]=tune2[135]=NOTE_DH3; tune2[136]=tune2[137]=NOTE_DH6; tune2[138]=tune2[139]=NOTE_DH5; 
    tune2[140]=NOTE_DH3; tune2[141]=NOTE_DH2; tune2[142]=tune2[143]=NOTE_DH1; tune2[144]=NOTE_D0; tune2[145]=NOTE_DH1; tune2[146]=NOTE_DH2; 
    tune2[147]=NOTE_DH1; tune2[148]=tune2[149]=NOTE_DH2; tune2[150]=NOTE_D7; tune2[151]=tune2[152]=tune2[153]=tune2[154]=NOTE_D6; tune2[155]=NOTE_D7;
  
    // 音符时值部分
    float *duration2 = new float[156];
    duration2[0]=duration2[1]=duration2[2]=1; duration2[3]=duration2[4]=0.5;
    duration2[5]=1.5; duration2[6]=0.5; duration2[7]=duration2[8]=duration2[9]=duration2[10]=duration2[11]=1; duration2[12]=duration2[13]=0.5;
    duration2[14]=1.5; duration2[15]=0.5; duration2[16]=duration2[17]=duration2[18]=duration2[19]=duration2[20]=duration2[21]=1;
    duration2[22]=1.5; duration2[23]=0.5; duration2[24]=duration2[25]=duration2[26]=duration2[27]=1; 
    duration2[28]=duration2[29]=duration2[30]=duration2[31]=0.5; duration2[32]=1.5; duration2[33]=0.5; 
    duration2[34]=duration2[35]=duration2[36]=duration2[37]=duration2[38]=1; duration2[39]=duration2[40]=0.5;
    duration2[41]=1.5; duration2[42]=0.5; duration2[43]=duration2[44]=duration2[45]=duration2[46]=duration2[47]=1;
    duration2[48]=duration2[49]=0.5; duration2[50]=1.5; duration2[51]=0.5; duration2[52]=duration2[53]=duration2[54]=duration2[55]=duration2[56]=1;
    duration2[57]=duration2[58]=0.5; duration2[59]=1; duration2[60]=0.5; duration2[61]=duration2[62]=duration2[63]=0.25;
    duration2[64]=duration2[65]=duration2[66]=duration2[67]=0.5; duration2[68]=0.25; duration2[69]=0.5; duration2[70]=1;
    duration2[71]=duration2[72]=duration2[73]=duration2[74]=0.5; duration2[75]=duration2[76]=duration2[77]=duration2[78]=duration2[79]=1;
    duration2[80]=duration2[81]=0.5; duration2[82]=1.5; duration2[83]=0.5; duration2[84]=duration2[85]=duration2[86]=duration2[87]=duration2[88]=1;
    duration2[89]=duration2[90]=0.5; duration2[91]=1.5; duration2[92]=0.5; 
    duration2[93]=duration2[94]=duration2[95]=duration2[96]=duration2[97]=duration2[98]=1; duration2[99]=duration2[100]=0.5;
    duration2[101]=duration2[102]=1; duration2[103]=duration2[104]=0.5; duration2[105]=1.5; duration2[106]=0.25; duration2[107]=0.5;
    duration2[108]=duration2[109]=duration2[110]=duration2[111]=duration2[112]=1;
    duration2[113]=duration2[114]=duration2[115]=duration2[116]=duration2[117]=duration2[118]=duration2[119]=duration2[120]=1;
    duration2[121]=duration2[122]=0.5; duration2[123]=duration2[124]=1; duration2[125]=duration2[126]=0.5; duration2[127]=1;
    duration2[128]=duration2[129]=0.5; duration2[130]=duration2[131]=duration2[132]=duration2[133]=duration2[134]=duration2[135]=1;
    duration2[136]=duration2[137]=duration2[138]=duration2[139]=1; duration2[140]=duration2[141]=0.5; duration2[142]=duration2[143]=1;
    duration2[144]=duration2[145]=0.5; duration2[146]=1; duration2[147]=0.5; duration2[148]=0.25; duration2[149]=0.5;
    duration2[150]=duration2[151]=duration2[152]=duration2[153]=1; duration2[154]=duration2[155]=0.5;
    Serial.println("2ed Finished");
    for (int x = 0; x < length2; x++)   //循环音符的次数
    {
      tone(Buzzer, tune2[x]);           //此函数依次播放tune序列里的数组，即每个 音符
      delay(400 * duration2[x]);        //每个音符持续的时间，即节拍duration，是调整时间的越大，曲子速度越慢，越小曲子速度越快，自己掌握吧
      noTone(Buzzer);                   //停止当前音符，进入下一音符
    }
    delete[] tune2;
    delete[] duration2;
    delay(3000);                        //音乐结束，安静3秒
  }
  else if (m == 2)                       // m = 2，祝你生日快乐
  {
    //-----------------------------生日快乐----------------------------------------
    // 音符
    int *tune3 = new int[25];
    tune3[0]=tune3[1]=Sol; tune3[2]=La; tune3[3]=Sol; tune3[4]=Do_h; tune3[5]=Si;
    tune3[6]=tune3[7]=Sol; tune3[8]=La; tune3[9]=Sol; tune3[10]=Re_h; tune3[11]=Do_h;
    tune3[12]=tune3[13]=Sol; tune3[14]=Sol_h; tune3[15]=Mi_h; tune3[16]=Do_h; tune3[17]=Si; tune3[18]=La;
    tune3[19]=tune3[20]=Fa_h; tune3[21]=Mi_h; tune3[22]=Do_h; tune3[23]=Re_h; tune3[24]=Do_h;
    // 音符时值
    float *duration3 = new float[25];
    duration3[0]=duration3[1]=0.5; duration3[2]=duration3[3]=duration3[4]=1; duration3[5]=2;
    duration3[6]=duration3[7]=0.5; duration3[8]=duration3[9]=duration3[10]=1; duration3[11]=2;
    duration3[12]=duration3[13]=0.5; duration3[14]=duration3[15]=duration3[16]=duration3[17]=duration3[18]=1;
    duration3[19]=duration3[20]=0.5; duration3[21]=duration3[22]=duration3[23]=1; duration3[24]=2;
    Serial.println("3rd Finished");
    for (int x = 0; x < length3; x++)
    {
      tone(Buzzer, tune3[x]);
      delay(500 * duration3[x]); //用来根据节拍调节延时，500这个指数可以自己调整
      delay(100 * duration3[x]);
      noTone(Buzzer);
    }
    delay(3000);                         //音乐结束，安静3秒
    delete[] tune3;
    delete[] duration3;
  }
  else if (m == 3)                      //hiahiahia，没有音乐
  {
    delay(3000);                        //音乐结束，安静3秒
  }
}