Button Box Code Template

//This code is in C++ and is for coding a button box using Arduino IDE 
//As of now (2025) we are using a Teensy 3.2 Board and using Teensyduino 
//with Arduino IDE

//This is the code
//Source: https://www.partsnotincluded.com/how-to-emulate-an-xbox-controller-with-arduino-xinput/ 
//This is a modified version of the USB_Joystick Button Example code

/* Buttons to USB Joystick Example

   You must select Joystick from the "Tools > USB Type" menu

   This example code is in the public domain.
*/

#include <Bounce.h>

// Create Bounce objects for each button.  The Bounce object
// automatically deals with contact chatter or "bounce", and
// it makes detecting changes very simple.
Bounce button1 = Bounce(1, 10);  // 10 = 10 ms debounce time
Bounce button2 = Bounce(2, 10);  // which is appropriate for
Bounce button3 = Bounce(3, 10);  // most mechanical pushbuttons
Bounce button4 = Bounce(4, 10);
Bounce button5 = Bounce(5, 10);
Bounce button6 = Bounce(6, 10);
Bounce button7 = Bounce(7, 10);
Bounce button8 = Bounce(8, 10);
Bounce button9 = Bounce(9, 10);

void setup() {
  // Configure the pins for input mode with pullup resistors.
  // The pushbuttons connect from each pin to ground.  When
  // the button is pressed, the pin reads LOW because the button
  // shorts it to ground.  When released, the pin reads HIGH
  // because the pullup resistor connects to +5 volts inside
  // the chip.  LOW for "on", and HIGH for "off" may seem
  // backwards, but using the on-chip pullup resistors is very
  // convenient.  The scheme is called "active low", and it's
  // very commonly used in electronics... so much that the chip
  // has built-in pullup resistors!
  pinMode(1, INPUT_PULLUP);
  pinMode(2, INPUT_PULLUP);
  pinMode(3, INPUT_PULLUP);
  pinMode(4, INPUT_PULLUP);
  pinMode(5, INPUT_PULLUP);
  pinMode(6, INPUT_PULLUP);  // Teensy++ LED, may need 1k resistor pullup
  pinMode(7, INPUT_PULLUP);
  pinMode(8, INPUT_PULLUP);
  pinMode(9, INPUT_PULLUP);

  // Please be aware the X, Y, Z, Zr and Slider axes will have default
  // settings, if you only use the buttons.  This can give the appearance
  // of the buttons interfering with the axes, if your PC software shows
  // different default assumed values before your first button press.
  //  More details here:
  //  https://forum.pjrc.com/threads/29320-Teensy-3-1-Button-problems?p=80275#post80275
}

void loop() {
  // Update all the buttons.  There should not be any long
  // delays in loop(), so this runs repetitively at a rate
  // faster than the buttons could be pressed and released.
  button1.update();
  button2.update();
  button3.update();
  button4.update();
  button5.update();
  button6.update();
  button7.update();
  button8.update();
  button9.update();

  // Check each button for "falling" edge.
  // Update the Joystick buttons only upon changes.
  // falling = high (not pressed - voltage from pullup resistor)
  //           to low (pressed - button connects pin to ground)
  if (button1.fallingEdge()) {
    Joystick.button(1, 1);
  }
  if (button2.fallingEdge()) {
    Joystick.button(2, 1);
  }
  if (button3.fallingEdge()) {
    Joystick.button(3, 1);
  }
  if (button4.fallingEdge()) {
    Joystick.button(4, 1);
  }
  if (button5.fallingEdge()) {
    Joystick.button(5, 1);
  }
  if (button6.fallingEdge()) {
    Joystick.button(6, 1);
  }
  if (button7.fallingEdge()) {
    Joystick.button(7, 1);
  }
  if (button8.fallingEdge()) {
    Joystick.button(8, 1);
  }
  if (button9.fallingEdge()) {
    Joystick.button(9, 1);
  }

  // Check each button for "rising" edge
  // Update the Joystick buttons only upon changes.
  // rising = low (pressed - button connects pin to ground)
  //          to high (not pressed - voltage from pullup resistor)
  if (button1.risingEdge()) {
    Joystick.button(1, 0);
  }
  if (button2.risingEdge()) {
    Joystick.button(2, 0);
  }
  if (button3.risingEdge()) {
    Joystick.button(3, 0);
  }
  if (button4.risingEdge()) {
    Joystick.button(4, 0);
  }
  if (button5.risingEdge()) {
    Joystick.button(5, 0);
  }
  if (button6.risingEdge()) {
    Joystick.button(6, 0);
  }
  if (button7.risingEdge()) {
    Joystick.button(7, 0);
  }
  if (button8.risingEdge()) {
    Joystick.button(8, 0);
  }
  if (button9.risingEdge()) {
    Joystick.button(9, 0);
  }
}