InputPin.hh

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#ifndef COSA_INPUT_PIN_HH
#define COSA_INPUT_PIN_HH

#include "Cosa/Pin.hh"

class InputPin : public Pin {
public:
  enum Mode {
    NORMAL_MODE = 0,
    PULLUP_MODE = 1
  } __attribute__((packed));

  InputPin(Board::DigitalPin pin, Mode mode = NORMAL_MODE) :
    Pin((uint8_t) pin)
  {
    if (mode == PULLUP_MODE)
      synchronized *PORT(pin) |= MASK(pin);
  }

  Mode mode() const
    __attribute__((always_inline))
  {
    return ((*PORT() & m_mask) != 0 ? PULLUP_MODE : NORMAL_MODE);
  }

  static void mode(Board::DigitalPin pin, Mode mode)
    __attribute__((always_inline))
  {
      synchronized {
        if (mode == PULLUP_MODE)
          *PORT(pin) |= MASK(pin);
        else
          *PORT(pin) &= ~MASK(pin);
      }
  }

  static Mode mode(Board::DigitalPin pin)
    __attribute__((always_inline))
  {
    return ((*PORT(pin) & MASK(pin)) == 0 ? NORMAL_MODE : PULLUP_MODE);
  }
};

#endif