IOPin.hh

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#ifndef COSA_IO_PIN_HH
#define COSA_IO_PIN_HH

#include "Cosa/OutputPin.hh"

class IOPin : public OutputPin {
public:
  enum Mode {
    OUTPUT_MODE = 0,
    INPUT_MODE = 1
  } __attribute__((packed));

  IOPin(Board::DigitalPin pin, Mode mode = INPUT_MODE, bool pullup = false) :
    OutputPin(pin)
  {
    synchronized {
      if (pullup)
        *PORT() |= m_mask;
    }
    this->mode(mode);
  }

  void mode(Mode mode)
    __attribute__((always_inline))
  {
    synchronized {
      if (mode == OUTPUT_MODE)
        *DDR() |= m_mask;
      else
        *DDR() &= ~m_mask;
    }
  }

  Mode mode() const
    __attribute__((always_inline))
  {
    return ((*DDR() & m_mask) == 0 ? INPUT_MODE : OUTPUT_MODE);
  }

  static void mode(Board::DigitalPin pin, Mode mode)
    __attribute__((always_inline))
  {
    volatile uint8_t* ddr = DDR(pin);
    const uint8_t mask = MASK(pin);
    synchronized {
      if (mode == OUTPUT_MODE)
        *ddr |= mask;
      else
        *ddr &= ~mask;
    }
  }

  static Mode mode(Board::DigitalPin pin)
    __attribute__((always_inline))
  {
    return ((*DDR(pin) & MASK(pin)) == 0 ? INPUT_MODE : OUTPUT_MODE);
  }
};

#endif