heartbeat.h

// heartbeat.h - muwerk heartbeat class
 
#pragma once
 
#include "ustd_platform.h"
#include "muwerk.h"
 
namespace ustd {
 
class heartbeat {
  private:
    unsigned long timerStart;
    unsigned long beatLength;
 
  public:
    heartbeat(unsigned long length = 0) : beatLength{length} {
        timerStart = millis();
    }
 
    heartbeat &operator=(const unsigned long length) {
        beatLength = length;
        return *this;
    }
 
    operator unsigned long() const {
        return beatLength;
    }
 
    unsigned long beat() {
        unsigned long now = millis();
        unsigned long diff = ustd::timeDiff(timerStart, now);
        if (beatLength && diff >= beatLength) {
            timerStart = now - (diff % beatLength);
            return diff / beatLength;
        }
        return 0;
    }
 
    unsigned long elapsed() {
        unsigned long now = millis();
        unsigned long diff = ustd::timeDiff(timerStart, now);
        if (beatLength && diff >= beatLength) {
            timerStart = now;
            return diff / beatLength;
        }
        return 0;
    }
};
 
}  // namespace ustd