Code for the Arduino Leonardo that controls the dance pad. Dance pad was built following the guidelines of Danceforce v3 and v4 by Promit at https://ventspace.wordpress.com/

dancepad.ino

#include <Gamepad.h>

// Gamepad initialization
Gamepad gp;

const int ledPin = 13;

// Buttons
const int up = A3;
const int start = A1;
const int right = A0;
const int down = A6;
const int left = A8;
const int back = A9;
const int buttons[6] = {up, down, left, right, start, back};
const int thresholds[6] = {18, 20, 20, 18, 18, 18};

void setup() {
  Serial.begin(38400);
  pinMode(ledPin, OUTPUT);
  for (int i = 0;i < sizeof(buttons); i++) {
    pinMode(buttons[i], INPUT_PULLUP);
  }
}

void loop() {
  bool buttonPressed = false;
  int analogReads[6] = {0};
  for (int i = 0;i < 6;i++) {
    analogReads[i] = analogRead(buttons[i]);
    if (analogReads[i] <= thresholds[i]) {
      buttonPressed = true;
      gp.setButtonState(i, true);
    }
    else {
      gp.setButtonState(i, false);
    }
  }

  if (buttonPressed) {
    digitalWrite(ledPin, HIGH);
  }
  else {
    digitalWrite(ledPin, LOW);
  }

  if (0) {
    for (int i = 0;i < 6;i++) {
      if (analogReads[i] < 21) {
        String debug = "up: " + String(analogReads[0]) + " down: " +
          String(analogReads[1]) + " left: " + String(analogReads[2]) +
          " right: " + String(analogReads[3]) + " start: " + String(analogReads[4]) +
          " back: " + String(analogReads[5]);
        Serial.println(debug);
        break;
      }
    }
//    delay(250);
  }

  delay(5);
}