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/* Copyright (C) 2010-2011 Circuits At Home, LTD. All rights reserved.
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This software may be distributed and modified under the terms of the GNU
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General Public License version 2 (GPL2) as published by the Free Software
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Foundation and appearing in the file GPL2.TXT included in the packaging of
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this file. Please note that GPL2 Section 2[b] requires that all works based
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on this software must also be made publicly available under the terms of
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the GPL2 ("Copyleft").
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Contact information
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-------------------
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Circuits At Home, LTD
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Web      :  http://www.circuitsathome.com
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e-mail   :  support@circuitsathome.com
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*/
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#include "simpletimer.h"
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bool SimpleTimer::Set(TimerCallback task, uint32_t timeout, bool once)
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{
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    if (!task)
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        return false;
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    timeOut     = timeout;
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    pCallback   = task;
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    timerAttribs.bmOneTime   = (once) ? 1 : 0;
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    timerAttribs.bmTimerSet  = 1;
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    timerAttribs.bmEnabled   = 0;
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    return true;
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}
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void SimpleTimer::Reset()
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{
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    timerAttribs.bmTimerSet  = 0;
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    timerAttribs.bmEnabled   = 0;
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    timerAttribs.bmOneTime   = 0;
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    timerAttribs.bmSign      = 0;
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    pCallback = NULL;
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}
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bool SimpleTimer::Enable()
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{
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    if (!pCallback || !timeOut)
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        return false;
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    uint32_t time = millis();
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    timeToFire = time + timeOut;
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    timerAttribs.bmEnabled   = 1;
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    timerAttribs.bmSign = time & MSB_MASK;
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    return true;
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}
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void SimpleTimer::Disable()
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{
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    timerAttribs.bmEnabled   = 0;
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}
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void SimpleTimer::Run()
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{
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    if (timerAttribs.bmEnabled == 0)
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        return;
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    if (TimeoutEllapsed())
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    {
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        if (pCallback)
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            pCallback();
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        if (timerAttribs.bmOneTime == 1)
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            timerAttribs.bmEnabled = 0;
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    }
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}
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bool SimpleTimer::TimeoutEllapsed()
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{
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    bool      ret   = false;
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    uint32_t  time  = millis();
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    if (time >= timeToFire || (time < timeToFire && timerAttribs.bmSign == 1) )
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    {
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        timeToFire = time + timeOut;
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        ret = true;
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    }
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    timerAttribs.bmSign = (time & MSB_MASK) ? 1 : 0;
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    return ret;
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}