Keypad.hh

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#ifndef COSA_KEYPAD_HH
#define COSA_KEYPAD_HH

#include "Cosa/Types.h"
#include "Cosa/AnalogPin.hh"
#include "Cosa/Periodic.hh"

class Keypad : public Periodic {
public:
  Keypad(Job::Scheduler* scheduler, Board::AnalogPin pin, const uint16_t* map) :
    Periodic(scheduler, SAMPLE_MS),
    m_key(pin, this, map)
  {}

  virtual void on_key_down(uint8_t nr)
  {
    UNUSED(nr);
  }

  virtual void on_key_up(uint8_t nr)
  {
    UNUSED(nr);
  }

protected:
  class Key : public AnalogPin {
  public:
    Key(Board::AnalogPin pin, Keypad* keypad, const uint16_t* map) :
      AnalogPin(pin),
      m_keypad(keypad),
      m_map(map),
      m_latest(0)
    {}

  private:
    Keypad* m_keypad;
    const uint16_t* m_map;
    uint8_t m_latest;

    virtual void on_change(uint16_t value);
  };

  static const uint16_t SAMPLE_MS = 64;

  Key m_key;

  virtual void run();
};

#endif