InputCapture.hh

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#ifndef COSA_INPUT_CAPTURE_HH
#define COSA_INPUT_CAPTURE_HH

#include "Cosa/Types.h"

#if !defined(BOARD_ATTINY)
#include "Cosa/Interrupt.hh"
#include "Cosa/Power.hh"

class InputCapture : public Interrupt::Handler {
public:
  enum InterruptMode {
    ON_FALLING_MODE,
    ON_RISING_MODE
  } __attribute__((packed));

  InputCapture(InterruptMode mode = ON_FALLING_MODE);

  static void begin()
  {
    Power::timer1_enable();
  }

  static void end()
  {
    Power::timer1_disable();
  }

  InterruptMode mode() const
  {
    // Check trigger mode setting
    if (TCCR1B & _BV(ICES1))
      return (ON_RISING_MODE);
    return (ON_FALLING_MODE);
  }

  void mode(InterruptMode mode)
  {
    // Set trigger on rising or falling on input capture pin
    if (mode == ON_RISING_MODE)
      TCCR1B |= _BV(ICES1);
    else
      TCCR1B &= ~_BV(ICES1);
  }

  uint16_t count()
  {
    uint16_t res;
    synchronized res = TCNT1;
    return (res);
  }

  virtual void on_interrupt(uint16_t arg = 0);

  virtual void enable();

  virtual void disable();

  virtual void clear();

private:
  static InputCapture* s_capture;
  friend void TIMER1_CAPT_vect(void);
};

#endif
#endif