joystick.cpp

/*
    Arduino Breakout
    Copyright (C) 2015 João André Esteves Vilaça

    https://github.com/vilaca/Handheld-Color-Console

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License along
    with this program; if not, write to the Free Software Foundation, Inc.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef JOYSTICKCPP
#define JOYSTICKCPP

#include <Arduino.h>

#define XPIN  0
#define YPIN  1
#define FIREPIN 2

#define CENTER  512

class Joystick
{
  public:

    static void init ()
    {
      pinMode ( FIREPIN, INPUT_PULLUP );
    }

    static int getX()
    {
      return getPosition(XPIN) * -1;
    }

    static int getY()
    {
      return getPosition(YPIN) * -1;
    }

    static boolean fire()
    {
      return digitalRead(FIREPIN) == LOW;
    }

    static void waitForRelease()
    {
      while (fire());
    }

    static void waitForRelease(int howLong)
    {
      int c = 0;
      do
      {
        delay (10);
        c += 10;
      }
      while ((fire() || getY() != 0 || getX() != 0) && c < howLong);
    }

    static void waitForClick()
    {
      while (!fire());
    }

  private:

    static int getPosition (int pin)
    {
      int n = analogRead(pin);
    
      n -= CENTER;
    
      n /= 128;
    
      return n;
    }
};

#endif