#include <WProgram.h>

class Wattlight {
  volatile unsigned int count;
  volatile unsigned long us, oldus;
  volatile boolean haveold;
public:
  unsigned int oldcount;
  unsigned long avgus;
  Wattlight ();
  inline __attribute__((always_inline)) void interrupt () {
    us = micros(); // Granularity only 4 us, this can be improved.
    if (haveold) {
      count++;
    } else {
      oldus = us;
      haveold = true;
    }
  }
  unsigned int pulses ();
  void readout ();
};