Week 13, HW11

1. 自動撥音樂(整首小蜜蜂)

int speakerPin = 9;

int length = 24; // the number of notes
char notes[] = "geefddcdefggggeefddceggc "; // a space represents a rest
int beats[] = { 1, 1, 2, 1, 1, 2, 1, 1, 1, 1, 1, 1, 
2, 1, 1, 2, 1, 1, 2, 1, 1, 1, 1, 4};
int tempo = 300;

void playTone(int tone, int duration) {
  for (long i = 0; i < duration * 1000L; i += tone * 2) {
    digitalWrite(speakerPin, HIGH);
    delayMicroseconds(tone);
    digitalWrite(speakerPin, LOW);
    delayMicroseconds(tone);
  }
}

void playNote(char note, int duration) {
  char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C' };
  int tones[] = { 1915, 1700, 1519, 1432, 1275, 1136, 1014, 956 };

  // play the tone corresponding to the note name
  for (int i = 0; i < 8; i++) {
    if (names[i] == note) {
      playTone(tones[i], duration);
    }
  }
}

void setup() {
  pinMode(speakerPin, OUTPUT);
}

void loop() {
  for (int i = 0; i < length; i++) {
    if (notes[i] == ' ') {
      delay(beats[i] * tempo); // rest
    } else {
      playNote(notes[i], beats[i] * tempo);
    }

    // pause between notes
    delay(tempo / 2); 
  }
}

2.可用按鍵彈音階

const int buttonPin1 = 2;
const int buttonPin2 = 3;
const int buttonPin3 = 4;
const int buttonPin4 = 5;
const int buttonPin5 = 6;

int speakerPin = 9;

int buttonState1 = 0; // variable for reading the pushbutton status
int buttonState2 = 0;
int buttonState3 = 0;
int buttonState4 = 0;
int buttonState5 = 0;

void setup() {
  
pinMode(buttonPin1, INPUT);
pinMode(buttonPin2, INPUT);
pinMode(buttonPin3, INPUT);
pinMode(buttonPin4, INPUT);
pinMode(buttonPin5, INPUT);


}

void loop() {
  buttonState1 = digitalRead(buttonPin1);
  buttonState2 = digitalRead(buttonPin2);
  buttonState3 = digitalRead(buttonPin3);
  buttonState4 = digitalRead(buttonPin4);
  buttonState5 = digitalRead(buttonPin5);
  int duration;
  
  if (buttonState1 == HIGH)  tone(speakerPin, 261,duration); //tone(pin, frequency, duration) 
  else if (buttonState2 == HIGH)  tone(speakerPin, 294,duration);
  else if (buttonState3 == HIGH)  tone(speakerPin, 329,duration);
  else if (buttonState4 == HIGH)  tone(speakerPin, 349,duration);
  else if (buttonState5 == HIGH)  tone(speakerPin, 392,duration);
  else {
  noTone(speakerPin);
  }
} 

3.心得

這節課教我們用 Arduino 撥放音樂，還有搭配按鈕彈音階， 讓我想到可以做鋼琴的小遊戲。

而且他的程式碼跟原裡沒有很難，董元李後就可以延伸很多不同的曲子。

可惜這節課當時沒有借到手機或相機，沒有把接出來的執行樣子拍攝下來，

有機會再用得獎的Arduino 再接一次~