Homework 3

Part 1

Basically it checks for when the button has changed state and if it has been clicked, it sends a note on message, and if it has been released, it sends a note off message. This is done multiple times in this case.

Part 2

Code:

int potValue = 0;

int button1Pin = 33;
int button2Pin = 34;
int button3Pin = 35;
int button4Pin = 36;

bool button1State = LOW;
bool lastButton1State = LOW;
bool button2State = LOW;
bool lastButton2State = LOW;
bool button3State = LOW;
bool lastButton3State = LOW;
bool button4State = LOW;
bool lastButton4State = LOW;

int controlState = 0;
int lastControlState = 0;

void setup() {
  Serial.begin(9600);

  pinMode(button1Pin, INPUT);
  pinMode(button2Pin, INPUT);
  pinMode(button3Pin, INPUT);
  pinMode(button4Pin, INPUT);
  
}

void loop() {

  usbMIDI.read();

  lastButton1State = button1State;
  button1State = digitalRead(button1Pin);

  lastButton2State = button2State;
  button2State = digitalRead(button2Pin);

  lastButton3State = button3State;
  button3State = digitalRead(button3Pin);

  lastButton4State = button4State;
  button4State = digitalRead(button4Pin);

  if(lastButton1State == LOW && button1State == HIGH) {

      usbMIDI.sendNoteOn(60,127,1);
      delay(5);
    
  } else if (lastButton1State == HIGH && button1State == LOW) {

      usbMIDI.sendNoteOff(60,0,1);
      delay(5);
    
  }

  if(lastButton2State == LOW && button2State == HIGH) {

      usbMIDI.sendNoteOn(62,127,1);
      delay(5);
    
  } else if (lastButton2State == HIGH && button2State == LOW) {

      usbMIDI.sendNoteOff(62,0,1);
      delay(5);
    
  }

  if(lastButton3State == LOW && button3State == HIGH) {

      usbMIDI.sendNoteOn(63,127,1);
      delay(5);
    
  } else if (lastButton3State == HIGH && button3State == LOW) {

      usbMIDI.sendNoteOff(63,0,1);
      delay(5);
    
  }

  if(lastButton4State == LOW && button4State == HIGH) {

      usbMIDI.sendNoteOn(65,127,1);
      delay(5);
    
  } else if (lastButton4State == HIGH && button4State == LOW) {

      usbMIDI.sendNoteOff(65,0,1);
      delay(5);
    
  }

  lastControlState = controlState;
  controlState = map(analogRead(A13), 0, 1023, 0, 127);
  controlState = constrain(controlState, 0, 127);

  if (lastControlState != controlState) {

      usbMIDI.sendControlChange(1, controlState, 1);
      Serial.println(controlState);
    
  }
  
  
}