patch for Arduino Timer

diff -u Timer-master/Event.cpp Timer/Event.cpp
--- Timer-master/Event.cpp  2013-10-20 03:24:16.000000000 +0200
+++ Timer/Event.cpp 2013-09-28 23:49:09.270507800 +0200
@@ -34,7 +34,7 @@
    eventType = EVENT_NONE;
 }

-void Event::update(void)
+uint8_t Event::update(void)
 {
    unsigned long now = millis();
    if (now - lastEventTime >= period)
@@ -52,9 +52,20 @@
        }
        lastEventTime = now;
        count++;
-   }
+
    if (repeatCount > -1 && count >= repeatCount)
    {
        eventType = EVENT_NONE;
    }
+   return true;
+   }
+   return false;
+}
+
+unsigned long Event::next(void) {
+   unsigned int next = lastEventTime + period - millis();
+   /* In der Callback Methode selbst ist lastEventtime noch nicht aktualisiert.
+   */
+   if (next == 0) { next = period; }
+   return next;
 }
diff -u Timer-master/Event.h Timer/Event.h
--- Timer-master/Event.h    2013-10-20 03:24:16.000000000 +0200
+++ Timer/Event.h   2013-09-28 23:48:58.965820300 +0200
@@ -34,7 +34,7 @@

 public:
   Event(void);
-  void update(void);
+  uint8_t update(void);
   int8_t eventType;
   unsigned long period;
   int repeatCount;
@@ -43,6 +43,7 @@
   void (*callback)(void);
   unsigned long lastEventTime;
   int count;
+  unsigned long next(void);
 };

 #endif
diff -u Timer-master/Timer.cpp Timer/Timer.cpp
--- Timer-master/Timer.cpp  2013-10-20 03:24:16.000000000 +0200
+++ Timer/Timer.cpp 2013-11-20 21:51:41.577148400 +0100
@@ -109,15 +109,17 @@
    }
 }

-void Timer::update(void)
+uint8_t Timer::update(void)
 {
+   boolean fired = false;
    for (int8_t i = 0; i < MAX_NUMBER_OF_EVENTS; i++)
    {
        if (_events[i].eventType != EVENT_NONE)
        {
-           _events[i].update();
+           fired |= _events[i].update();
        }
    }
+   return fired;
 }

 int8_t Timer::findFreeEventIndex(void)
@@ -131,3 +133,16 @@
    }
    return NO_TIMER_AVAILABLE;
 }
+
+unsigned long Timer::next(void) {
+   unsigned long min = 0;
+   unsigned long next;
+   for (int8_t i = 0; i < MAX_NUMBER_OF_EVENTS; i++) {
+       if (_events[i].eventType != EVENT_NONE) {
+           next = _events[i].next();
+           if (min == 0) { min = next; }
+           else if (next < min) { min = next; }
+       }
+   }
+   return min;
+}
\ No newline at end of file
diff -u Timer-master/Timer.h Timer/Timer.h
--- Timer-master/Timer.h    2013-10-20 03:24:16.000000000 +0200
+++ Timer/Timer.h   2013-09-28 23:50:27.280273400 +0200
@@ -55,8 +55,8 @@
    */
   int8_t pulseImmediate(uint8_t pin, unsigned long period, uint8_t pulseValue);
   void stop(int8_t id);
-  void update(void);
-
+  uint8_t update(void);
+  unsigned long next(void);
 protected:
   Event _events[MAX_NUMBER_OF_EVENTS];
   int8_t findFreeEventIndex(void);
Common subdirectories: Timer-master/examples and Timer/examples