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 。
English 
简体中文