An Arduino library containing several types of non-blocking millis timers for general use.  Any reasonable number of timers in any combination can be used.  The timers must be updated repeatedly in loop() and two calls are provided for this.

The example sketches were tested on a standard Aduino NANO and developed on an UNO R3.

OnDelayTimer myTimer1(UL) - A timer which runs when reset is false and enable is true.  If reset is true or enable is false it is reset.  isDone(bool) goes true when preset is reached, false otherwise.

OffDelayTimer myTimer1(UL) - Off delay timer functions like an on delay timer but enable and done operate inversely to an on delay timer.  Timer is reset to zero accumulated value and isDone() is true when isEnabled() is true.  Timing cycle begins when enable goes false and after the delay time isDone() goes false.

RetentiveTimer myTimer1(UL) - A timer which accumulates when enabled and holds its accumulated value when enable is false.  This timer type is reset only by making setReset() true.

PulseGenTimer myTimer1(UL) - A timer which runs when enabled and not reset.  Resets itself upon reaching preset then restarts the timing cycle automatically as long as enable is true.

RetriggerableTimer myTimer1(UL) - When the timer is enabled a change of state on the 'control' input resets the timer and restarts the timing cycle.  Continuous cycling of the control input at a rate faster than the time delay will cause the isDone() status flag to remain low indefinitely.  See 'retriggerable monostable multivibrator' on the web.

FlasherTimer myTimer1(UL, UL) - This timer runs and resets itself automatically when enabled.  The first constructor argument specifies the period of the timer, say one second.  The second constructor argument specifies an ON time for a special output <.isFlashing(bool)> unique to this type.  The onTime value can be runtime modified using the function myTimer1.setOnTime(UL).  If onTime is modified at runtime the timer is immediately reset.

Flasher timer can be used as a pulse generator timer but the isFlashing() and setOnTime() features will incur a penalty in memory and clock cycle usage over a PulseGenTimer.

your timer name.update() - Update the accumulated value and flags for one timer.  You can use a separate call for each of more than one timer or;

Multi_Timer::updateAllTimers() - Update value and flags for all Multi_Timer_V2 types.

myTimer1.setEnable(bool) - Set to true enables a timer to run, provided the timer is not being held reset by .setReset(bool). Set to false the timer resets or stops.

myTimer1.setReset(bool) - Set to false a timer is enabled to run.  Set to true a timer is reset to a zero accumulated value and .isDone() will return false.  The timer will be held at reset until setReset is set false.

myTimer1.setCtrl(bool) - A few types of timers use this as a special start signal.

myTimer1.setOnTime(unsigned long) - Runtime modify the ON time of a flasher type timer.  Set onTime to some fraction of the preset value.

bool myTimer1.isDone() - Returns true if the timer has reached its preset value.  Returns false otherwise.  In the case of the off timer .isDone() returns false when preset is reached and is true otherwise.

bool myTimer1.isRunning() - Returns true if the timer is actively timing and has not reached its preset value.  Returns false otherwise.

bool myTimer1.isEnabled() - Returns true if the timer is enabled to run.

bool myTimer1.isReset() - Returns true if the timer is being held reset.

bool myTimer1.getDoneRose() - True for one program scan when the timer reaches its preset value.

bool myTimer1.getDoneFell() - True for one program scan when the timer is reset, if the timer has reached its preset value.

bool mytimer1.isFlashing() - A special output for the flasherTimer type that goes true when timing starts and goes false when ON time milliseconds is reached.

unsigned long myTimer1.getCount() - Returns the current timer accumulated value.