Ardunio开发实例-蜂鸣器播放音乐

蜂鸣器播放音乐
蜂鸣器是一种一体化结构的电子讯响器,采用直流电压供电,广泛应用于计算机、打印机、复印机、报警器、电子玩具、汽车电子设备、电话机、定时器等电子产品中作发声器件。蜂鸣器主要分为压电式蜂鸣器和电磁式蜂鸣器两种类型。蜂鸣器在电路中用字母H或”HA(l旧标准用“FM””、“ZZG”、“LB”、“JD”等)表示。

本次将使用一个无源蜂鸣器模块实现警报声音播放以及MDI音乐播放。
1、硬件准备
。Arduino UNO开发板一块。杜邦线若干、数据线一条。数据线—条
·蜂鸣器模块一个(这里使用无源类型的)
蜂鸣器与Arduino的电路接线非简单,如下图:

2、软件准备
Arduino IDE
3、实现代码如下简单报警声音播放

const int buzzer = 5;

void setup(){
// 设置引脚模式
pinMode(buzzer, OUTPUT);

}

void loop(){

tone(buzzer, 1000); // 生产 1KHz 声音信号
delay(500);
noTone(buzzer); // 停止声音播放
delay(500);

}

上面代码主要是通过tone函数和noTone函数来实现声音的播放与关闭。
tone函数原型如下:

tone(pin, frequency)
tone(pin, frequency, duration)

参数描述如下:

  • pin:指定引脚
    frequency :音调的频率(以赫兹为单位)。允许的数据类型unsigned int .
    duration :音调的持续时间(以毫秒为单位)(可选)。允许的数据类型: unsigned long .

tone函数主要用于在指定引脚上生成指定频率(和50%占空比)的方波。可以指定一个持续时间,否则wave将继续直到调用noTone ()为止。该引脚可以连接到压电蜂鸣器或其他扬声器以播放音调。
一次只能产生一种音调。如果某个音色已经在其他引脚上播放,则对tone函数的调用将无效。如果该音调在同一引脚上播放,则通话将设置其频率。
使用tone函数将干扰引脚3和11(Mega以外的板上)上的PWM输出;并且不可能产生低于31Hz的音调。有关技术细节,请参阅BrettHagman’s notes.
noTome:停止生成由tone()触发的方波。如果没有声音产生,则无效。

播放一段音乐

/*
Happy Birthday
Connect a piezo buzzer or speaker to pin 11 or select a new pin.
More songs available at https://github.com/robsoncouto/arduino-songs
*/
*/

define NOTE_B0 31

define NOTE_C1 33

define NOTE_CS1 35

define NOTE_D1 37

define NOTE_DS1 39

define NOTE_E1 41

define NOTE_F1 44

define NOTE_FS1 46

define NOTE_G1 49

define NOTE_GS1 52

define NOTE_A1 55

define NOTE_AS1 58

define NOTE_B1 62

define NOTE_C2 65

define NOTE_CS2 69

define NOTE_D2 73

define NOTE_DS2 78

define NOTE_E2 82

define NOTE_F2 87

define NOTE_FS2 93

define NOTE_G2 98

define NOTE_GS2 104

define NOTE_A2 110

define NOTE_AS2 117

define NOTE_B2 123

define NOTE_C3 131

define NOTE_CS3 139

define NOTE_D3 147

define NOTE_DS3 156

define NOTE_E3 165

define NOTE_F3 175

define NOTE_FS3 185

define NOTE_G3 196

define NOTE_GS3 208

define NOTE_A3 220

define NOTE_AS3 233

define NOTE_B3 247

define NOTE_C4 262

define NOTE_CS4 277

define NOTE_D4 294

define NOTE_DS4 311

define NOTE_E4 330

define NOTE_F4 349

define NOTE_FS4 370

define NOTE_G4 392

define NOTE_GS4 415

define NOTE_A4 440

define NOTE_AS4 466

define NOTE_B4 494

define NOTE_C5 523

define NOTE_CS5 554

define NOTE_D5 587

define NOTE_DS5 622

define NOTE_E5 659

define NOTE_F5 698

define NOTE_FS5 740

define NOTE_G5 784

define NOTE_GS5 831

define NOTE_A5 880

define NOTE_AS5 932

define NOTE_B5 988

define NOTE_C6 1047

define NOTE_CS6 1109

define NOTE_D6 1175

define NOTE_DS6 1245

define NOTE_E6 1319

define NOTE_F6 1397

define NOTE_FS6 1480

define NOTE_G6 1568

define NOTE_GS6 1661

define NOTE_A6 1760

define NOTE_AS6 1865

define NOTE_B6 1976

define NOTE_C7 2093

define NOTE_CS7 2217

define NOTE_D7 2349

define NOTE_DS7 2489

define NOTE_E7 2637

define NOTE_F7 2794

define NOTE_FS7 2960

define NOTE_G7 3136

define NOTE_GS7 3322

define NOTE_A7 3520

define NOTE_AS7 3729

define NOTE_B7 3951

define NOTE_C8 4186

define NOTE_CS8 4435

define NOTE_D8 4699

define NOTE_DS8 4978

define REST 0

// change this to make the song slower or faster
int tempo = 140;

// change this to whichever pin you want to use
int buzzer = 5;

// notes of the moledy followed by the duration.
// a 4 means a quarter note, 8 an eighteenth , 16 sixteenth, so on
// !!negative numbers are used to represent dotted notes,
// so -4 means a dotted quarter note, that is, a quarter plus an eighteenth!!
int melody[] = {

// Happy Birthday
// Score available at https://musescore.com/user/8221/scores/26906

NOTE_C4,4, NOTE_C4,8,
NOTE_D4,-4, NOTE_C4,-4, NOTE_F4,-4,
NOTE_E4,-2, NOTE_C4,4, NOTE_C4,8,
NOTE_D4,-4, NOTE_C4,-4, NOTE_G4,-4,
NOTE_F4,-2, NOTE_C4,4, NOTE_C4,8,

NOTE_C5,-4, NOTE_A4,-4, NOTE_F4,-4,
NOTE_E4,-4, NOTE_D4,-4, NOTE_AS4,4, NOTE_AS4,8,
NOTE_A4,-4, NOTE_F4,-4, NOTE_G4,-4,
NOTE_F4,-2,

};

// sizeof gives the number of bytes, each int value is composed of two bytes (16 bits)
// there are two values per note (pitch and duration), so for each note there are four bytes
int notes = sizeof(melody) / sizeof(melody[0]) / 2;

// this calculates the duration of a whole note in ms
int wholenote = (60000 * 4) / tempo;

int divider = 0, noteDuration = 0;

void setup() {
// iterate over the notes of the melody.
// Remember, the array is twice the number of notes (notes + durations)

}

void loop() {
// no need to repeat the melody.
for (int thisNote = 0; thisNote < notes * 2; thisNote = thisNote + 2) {
// calculates the duration of each note
divider = melody[thisNote + 1];
if (divider > 0) {
  // regular note, just proceed
  noteDuration = (wholenote) / divider;
} else if (divider < 0) {
  // dotted notes are represented with negative durations!!
  noteDuration = (wholenote) / abs(divider);
  noteDuration *= 1.5; // increases the duration in half for dotted notes
}

// we only play the note for 90% of the duration, leaving 10% as a pause
tone(buzzer, melody[thisNote], noteDuration * 0.9);

// Wait for the specief duration before playing the next note.
delay(noteDuration);

// stop the waveform generation before the next note.
noTone(buzzer);
}
}

上述代码参考了https:/lgithub.com/robsoncoutolarduino-songs 。

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