Arduino單元測試：測試(無源和有源)蜂鳴器

先說明什麼是有源和無源蜂鳴器，有源和無源這裡的“源”不是指電源，而是指震盪源。也就是說，有源蜂鳴器內部帶震盪源，所以只要一通電就會叫。

• 無源蜂鳴器

有關pitches.h可至這邊下載
Code(單音節)

#include pitches.h

 // notes in the melody: 
 int melody[] = { 
   NOTE_C5, NOTE_D5, NOTE_E5, NOTE_F5, NOTE_G5, NOTE_A5, NOTE_B5, NOTE_C6}; 
 int duration = 500;  // 500 miliseconds 
   
 void setup() { 
 } 

 void loop() {   
   for (int thisNote = 0; thisNote < 8; thisNote++) { 
     // 在 pin8 上輸出聲音，每個音階響 0.5 秒 
     tone(8, melody[thisNote], duration); 
     // 間隔一段時間後再播放下一個音階 
     delay(1000); 
   } 
   // 兩秒後重新播放  
   delay(2000); 

 } 

Code(超級馬力)

#include pitches.h

// notes in the melody : super mario

    int melodyMario[] = {

    NOTE_E4, NOTE_E4, NOTE_E4, NOTE_C4, NOTE_E4, NOTE_G4, NOTE_G3,  
    NOTE_C4, NOTE_G3, NOTE_E3, NOTE_A3, NOTE_B3, NOTE_AS3, NOTE_A3, NOTE_G3, NOTE_E4, NOTE_G4, NOTE_A4, NOTE_F4, NOTE_G4, NOTE_E4, NOTE_C4, NOTE_D4, NOTE_B3,
    NOTE_C4, NOTE_G3, NOTE_E3, NOTE_A3, NOTE_B3, NOTE_AS3, NOTE_A3, NOTE_G3, NOTE_E4, NOTE_G4, NOTE_A4, NOTE_F4, NOTE_G4, NOTE_E4, NOTE_C4, NOTE_D4, NOTE_B3,
    NOTE_G4, NOTE_FS4, NOTE_E4, NOTE_DS4, NOTE_E4, NOTE_GS3, NOTE_A3, NOTE_C4, NOTE_A3, NOTE_C4, NOTE_D4, NOTE_G4, NOTE_FS4, NOTE_E4, NOTE_DS4, NOTE_E4, NOTE_C5, NOTE_C5, NOTE_C5,
    NOTE_G4, NOTE_FS4, NOTE_E4, NOTE_DS4, NOTE_E4, NOTE_GS3, NOTE_A3, NOTE_C4, NOTE_A3, NOTE_C4, NOTE_D4, NOTE_DS4, NOTE_D4, NOTE_C4,
    NOTE_C4, NOTE_C4, NOTE_C4, NOTE_C4, NOTE_D4, NOTE_E4, NOTE_C4, NOTE_A3, NOTE_G3, NOTE_C4, NOTE_C4, NOTE_C4, NOTE_C4, NOTE_D4, NOTE_E4,
    NOTE_C4, NOTE_C4, NOTE_C4, NOTE_C4, NOTE_D4, NOTE_E4, NOTE_C4, NOTE_A3, NOTE_G3

    };

    // note durations: 4 = quarter note, 8 = eighth note, etc.:

    int noteDurationsMario[] = {
    8,4,4,8,4,2,2,
    3,3,3,4,4,8,4,8,8,8,4,8,4,3,8,8,3,
    3,3,3,4,4,8,4,8,8,8,4,8,4,3,8,8,2,
    8,8,8,4,4,8,8,4,8,8,3,8,8,8,4,4,4,8,2,
    8,8,8,4,4,8,8,4,8,8,3,3,3,1,
    8,4,4,8,4,8,4,8,2,8,4,4,8,4,1,
    8,4,4,8,4,8,4,8,2

    };
   
 void setup() { 
     // iterate over the notes of the melody:
    for (int thisNote = 0; thisNote < 98; thisNote++) {
    // to calculate the note duration, take one second
    // divided by the note type.
    //e.g. quarter note = 1000 / 4, eighth note = 1000/8, etc.
    int noteDuration = 1000/noteDurationsMario[thisNote];
    tone(8, melodyMario[thisNote],noteDuration);


    // to distinguish the notes, set a minimum time between them.
    // the note's duration + 30% seems to work well:
    int pauseBetweenNotes = noteDuration * 1.30;
    delay(pauseBetweenNotes);

    // stop the tone playing:
    noTone(8);
    }
 } 

 void loop() {   
   

 }  

tone()函數說明：
tone(pin, frequency)
tone(pin, frequency, duration)
pin 訊號接口， frequency,頻率，duration間距

無源蜂鳴器接口完成圖

• 有源蜂鳴器

• 透過藍芽控制LED和蜂鳴器

我們經由藍芽測試將再LED和蜂鳴器一起控制。
Code

#include pitches.h
SoftwareSerial BTSerial(10, 11); // RX | TX
int Buzzerpin = 3;

void setup()
{
  Serial.begin(57600);
  //pinMode(13, OUTPUT); 
  pinMode(8, OUTPUT); 
  pinMode(Buzzerpin,OUTPUT);   
  digitalWrite(Buzzerpin,LOW);     //蜂鳴器初始為不鳴叫  
  BTSerial.begin(57600);  // HC-06 current bound rate (default 9600)
}
void loop()
{
  // 讀出第 1 個字元 
     unsigned char charreceived = BTSerial.read(); 
     switch(charreceived){ 
      case '1': 
      //digitalWrite(13, HIGH); 
      digitalWrite(8, HIGH);        //啟動LDE
      digitalWrite(Buzzerpin,HIGH); //啟動蜂鳴器
      Serial.println("  Arduino Led On"); 
     // Alarm();
      break; 
      case '0': 
        // digitalWrite(13, LOW); 
         digitalWrite(8, LOW);      //關閉LED
         Serial.println("  Arduino Led Off"); 
        digitalWrite(Buzzerpin,LOW);   ////關閉蜂鳴器
        
         break; 
      default: 
  
         break; 
     }
     Serial.flush(); 
     delay(10); 
}

參考資料

1. http://yehnan.blogspot.tw/2012/02/arduinoloudspeaker.html
2. http://coopermaa2nd.blogspot.tw/2010/12/arduino-lab6.html
3. http://blog.csdn.net/bitezijie/article/details/24815203