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SimpleTimer.h
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SimpleTimer.h
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/*
* SimpleTimer.h
*
* SimpleTimer - A timer library for Arduino.
* Author: mromani@ottotecnica.com
* Copyright (c) 2010 OTTOTECNICA Italy
*
* This library is free software; you can redistribute it
* and/or modify it under the terms of the GNU Lesser
* General Public License as published by the Free Software
* Foundation; either version 2.1 of the License, or (at
* your option) any later version.
*
* This library is distributed in the hope that it will
* be useful, but WITHOUT ANY WARRANTY; without even the
* implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser
* General Public License along with this library; if not,
* write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifndef SIMPLETIMER_H
#define SIMPLETIMER_H
#if defined(ARDUINO) && ARDUINO >= 100
#include <Arduino.h>
#else
#include <WProgram.h>
#endif
typedef void (*timer_callback)(void);
class SimpleTimer {
public:
// maximum number of timers
const static int MAX_TIMERS = 10;
// setTimer() constants
const static int RUN_FOREVER = 0;
const static int RUN_ONCE = 1;
// constructor
SimpleTimer();
// this function must be called inside loop()
void run();
// call function f every d milliseconds
int setInterval(long d, timer_callback f);
// call function f once after d milliseconds
int setTimeout(long d, timer_callback f);
// call function f every d milliseconds for n times
int setTimer(long d, timer_callback f, int n);
// destroy the specified timer
void deleteTimer(int numTimer);
// restart the specified timer
void restartTimer(int numTimer);
// returns true if the specified timer is enabled
boolean isEnabled(int numTimer);
// enables the specified timer
void enable(int numTimer);
// disables the specified timer
void disable(int numTimer);
// enables the specified timer if it's currently disabled,
// and vice-versa
void toggle(int numTimer);
// returns the number of used timers
int getNumTimers();
// returns the number of available timers
int getNumAvailableTimers() { return MAX_TIMERS - numTimers; };
private:
// deferred call constants
const static int DEFCALL_DONTRUN = 0; // don't call the callback function
const static int DEFCALL_RUNONLY = 1; // call the callback function but don't delete the timer
const static int DEFCALL_RUNANDDEL = 2; // call the callback function and delete the timer
// find the first available slot
int findFirstFreeSlot();
// value returned by the millis() function
// in the previous run() call
unsigned long prev_millis[MAX_TIMERS];
// pointers to the callback functions
timer_callback callbacks[MAX_TIMERS];
// delay values
long delays[MAX_TIMERS];
// number of runs to be executed for each timer
int maxNumRuns[MAX_TIMERS];
// number of executed runs for each timer
int numRuns[MAX_TIMERS];
// which timers are enabled
boolean enabled[MAX_TIMERS];
// deferred function call (sort of) - N.B.: this array is only used in run()
int toBeCalled[MAX_TIMERS];
// actual number of timers in use
int numTimers;
};
#endif