ExternalInterrupt.hh

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#ifndef COSA_EXTERNAL_INTERRUPT_HH
#define COSA_EXTERNAL_INTERRUPT_HH

#include "Cosa/Types.h"
#include "Cosa/Bits.h"
#include "Cosa/IOPin.hh"
#include "Cosa/Interrupt.hh"

class ExternalInterrupt : public IOPin, public Interrupt::Handler {
public:
  enum InterruptMode {
    ON_LOW_LEVEL_MODE = 0,
    ON_CHANGE_MODE = _BV(ISC00),
    ON_FALLING_MODE = _BV(ISC01),
    ON_RISING_MODE = (_BV(ISC01) | _BV(ISC00))
  } __attribute__((packed));

  ExternalInterrupt(Board::ExternalInterruptPin pin,
                    InterruptMode mode = ON_CHANGE_MODE,
                    bool pullup = false);

  virtual void on_interrupt(uint16_t arg = 0)
  {
    UNUSED(arg);
  }

  virtual void enable();

  virtual void disable();

  virtual void clear();

private:
  static ExternalInterrupt* ext[Board::EXT_MAX];

  uint8_t m_ix;

  friend void INT0_vect(void);
#if defined(INT1_vect)
  friend void INT1_vect(void);
#endif
#if defined(INT2_vect)
  friend void INT2_vect(void);
#endif
#if defined(INT3_vect)
  friend void INT3_vect(void);
#endif
#if defined(INT4_vect)
  friend void INT4_vect(void);
#endif
#if defined(INT5_vect)
  friend void INT5_vect(void);
#endif
#if defined(INT6_vect)
  friend void INT6_vect(void);
#endif
#if defined(INT7_vect)
  friend void INT7_vect(void);
#endif
};

#endif