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;
};