soilTales.io

/* Ella Dagan, Olivia Cueva, Vinyata Pany
    Feb 20, 2017
    Music Player, Tangible Interaction Workshop

    To control p5.js music player sketch created by Tom Igoe
    https://github.com/tigoe/p5js_examples/tree/master/musicPlayer

    Sensors
    - Toggle Switch
    - Momentary Push Button
    - Joystick with push button

    Code References:
    https://www.arduino.cc/en/Tutorial/BlinkWithoutDelay

*/

//Constant Variables wont change
const int stopPlayPin = 7; // setting stop/play button as variable that will not change
const int playPausePin = 4; // setting pause/play button as variable that will not change
const int joyStickXAxis = A0; // xAxis (Horizontal Axis) pin
const int shufflePin = 8; // shufflePin on joystick

// These variables will change
int readingJoyStick; // reading the information coming in from the joystick pin

// To set a minimum and maximum limit for the xAxis of the joystick
int threshold = 350 / 10; //set at this value because the resting value
// of the joystick at 454. Dividing by 10 to get a more precise reading.
int thresholdBack = 70;

//To detect if you pressing once or holding down right xAxis of joystick
int interval = 700; // 700 milli seconds of an interaval
boolean shortMsgSent = false; // begins with doing nothing
boolean longMsgSent = false; // begins with doing nothing
boolean isShortPress = false; // begins with doing nothing


// stopPlayButtonSwitch variable will change states:
int stopPlayButtonSwitchCounter = 0;   // counter for the number of button presses
int stopPlayButtonState = 0;         // current state of the button
int lastStopPlayButtonState = 0;     // previous state of the button

//playPauseButtonSwitch variable will change states:
int playPauseButtonSwitchCounter = 0;
int playPauseButtonState = 0;
int lastPlayPauseButtonState = 0;

//shuffleButtonSwitch variable will change states:
int shuffleButtonSwitchCounter = 0;
int shuffleButtonState = 0;
int lastShuffleButtonState = 0;

// these long integers read the millis and will detect change in time going forward
unsigned long prevMillis = 0;
unsigned long currMillis = 0;

// these long integers read the millis and will detect change in time for going Back
unsigned long prevMillisBack = 0;
unsigned long currMillisBack = 0;

void setup() {
  pinMode(stopPlayPin, INPUT_PULLUP);
  pinMode(playPausePin, INPUT);
  pinMode(shufflePin, INPUT_PULLUP);
  Serial.begin(9600);
}

void loop() {
  ///////// Stop and Play button code /////////

  stopPlayButtonState = digitalRead(stopPlayPin);

  //compare the stopPlayButtonState to it's previous state
  if (stopPlayButtonState != lastStopPlayButtonState) { // if current button state is different than the last state
    Serial.write(49); // write to p5
    lastStopPlayButtonState = stopPlayButtonState; // now the last button state becomes the current state


  }

  ///////// Joystick code /////////

  readingJoyStick = (analogRead(joyStickXAxis)) / 10; // these reads what's coming in from A0

  // Joystick skip backward reading

  if (readingJoyStick > thresholdBack) { //if data coming in from A0 is more than the threshold(70)
    currMillisBack = millis(); // and the current millis becomes the time since
    // the arduino program started running.

    if (currMillisBack - prevMillisBack > interval) { // long press test
      prevMillisBack = currMillisBack;
      Serial.write(52);
    }
  }

  // Joystick skip forward and speed up song reading

  if (readingJoyStick < threshold) { //if data coming in from A0 is less than the threshold(350)
    // we know the joystick shifted to the right
    currMillis = millis(); // and the current millis becomes the time since
    // the arduino program started running.

    if (currMillis - prevMillis > interval) { // long press test
      prevMillis = currMillis;
      isShortPress = false;
      shortMsgSent = true;
      // print LongPress msg
      if (!longMsgSent) {
        //Serial.println(2); // long
        Serial.write(53);
        longMsgSent = true;
      }
    } else {
      if (!longMsgSent) {
        isShortPress = true;
        shortMsgSent = false;
      }
    }
  } else {
    prevMillis = millis();
    currMillis = prevMillis;

    if (isShortPress && !shortMsgSent) {
      // print ShortPress msg
      Serial.write(51);
      shortMsgSent = true;
    }
    longMsgSent = false;
  }

  ///////// Play and Pause button code //////////

  playPauseButtonState = digitalRead(playPausePin);

  if (playPauseButtonState != lastPlayPauseButtonState) { // if current button state is different than the last state
    if (playPauseButtonState == HIGH) {
      //Serial.println("change detected");
      Serial.write(50); // write to p5
      
    }
  }
  lastPlayPauseButtonState = playPauseButtonState; // now the last button state becomes the current state


  ////// Joystick BUTTON code (SHUFFLE button) //////

  shuffleButtonState = digitalRead(shufflePin);

  //compare the stopPlayButtonState to it's previous state
  if (shuffleButtonState != lastShuffleButtonState) { // if current button state is different than the last state
    Serial.write(54); // write to p5
    lastShuffleButtonState = shuffleButtonState; // now the last button state becomes the current state

  }
}