Pushbutton.h

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// Copyright Pololu Corporation.  For more information, see http://www.pololu.com/

#pragma once

#include <Arduino.h>

#define PULL_UP_DISABLED    0

#define PULL_UP_ENABLED     1

#define DEFAULT_STATE_LOW   0

#define DEFAULT_STATE_HIGH  1

#define ZUMO_BUTTON 12

// \cond
class PushbuttonStateMachine
{
public:

  PushbuttonStateMachine();

  bool getSingleDebouncedRisingEdge(bool value);

private:

  uint8_t state;
  uint16_t prevTimeMillis;
};
// \endcond

class PushbuttonBase
{
public:

  void waitForPress();

  void waitForRelease();

  void waitForButton();

  bool getSingleDebouncedPress();

  bool getSingleDebouncedRelease();

  virtual bool isPressed() = 0;

private:

  PushbuttonStateMachine pressState;
  PushbuttonStateMachine releaseState;
};

class Pushbutton : public PushbuttonBase
{
public:

  Pushbutton(uint8_t pin, uint8_t pullUp = PULL_UP_ENABLED,
      uint8_t defaultState = DEFAULT_STATE_HIGH);

  virtual bool isPressed();

private:

  void init()
  {
    if (!initialized)
    {
      initialized = true;
      init2();
    }
  }

  void init2();

  bool initialized;
  uint8_t _pin;
  bool _pullUp;
  bool _defaultState;
};