teensy 3.1 quick sketch 32 buttons no pullup

teensy31-buttons-basics.ino

// the buttons in the gamecontroller will be in that order.
// first button in array.. button#1, second button, button#2 etc.
// if you need to skip a button set the value "-1"

const int buttonPins[] = {
  11, // Button 1  | Paddle Shift Down
  19, // Button 2  | Paddle Shift Up
  -1, // Button 3  | ------------------
  5,  // Button 4  | Exit
  7,  // Button 5  | Up
  9,  // Button 6  | Down
  10, // Button 7  | Pit Limiter
  14, // Button 8  | minus 1
  15, // Button 9  | Okay/Enter
  16, // Button 10 | Prev
  17, // Button 11 | Next
  18, // Button 12 | Push to talk
};

void setup() {
  Joystick.useManualSend(true);

  Joystick.hat(-1); // disable hat switch

  // set up pullup for buttons
  for (int i = 0; i < (sizeof(buttonPins)/sizeof(int)); i++) {
    if (buttonPins[i] > 0) {
      pinMode(buttonPins[i], INPUT_PULLUP);
    }
  }
}

void loop() {  
  updateButtons();

  Joystick.send_now();
  delay(5); // 5ms sleep, runs at 200Hz. Should be fairly enough
}

void updateButtons() {
  for (int i = 0; i < (sizeof(buttonPins)/sizeof(int)); i++) {
     if (buttonPins[i] > 0) {
        Joystick.button(i+1, digitalRead(buttonPins[i]));
     }
  }
}