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<div class="title">ChaseLEDs.cpp</div> </div>
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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
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<a name="l00002"></a>00002 <span class="comment"> * Copyright (C) 2012 Southern Storm Software, Pty Ltd.</span>
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<a name="l00003"></a>00003 <span class="comment"> *</span>
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<a name="l00004"></a>00004 <span class="comment"> * Permission is hereby granted, free of charge, to any person obtaining a</span>
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<a name="l00005"></a>00005 <span class="comment"> * copy of this software and associated documentation files (the "Software"),</span>
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<a name="l00006"></a>00006 <span class="comment"> * to deal in the Software without restriction, including without limitation</span>
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<a name="l00007"></a>00007 <span class="comment"> * the rights to use, copy, modify, merge, publish, distribute, sublicense,</span>
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<a name="l00008"></a>00008 <span class="comment"> * and/or sell copies of the Software, and to permit persons to whom the</span>
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<a name="l00009"></a>00009 <span class="comment"> * Software is furnished to do so, subject to the following conditions:</span>
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<a name="l00010"></a>00010 <span class="comment"> *</span>
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<a name="l00011"></a>00011 <span class="comment"> * The above copyright notice and this permission notice shall be included</span>
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<a name="l00012"></a>00012 <span class="comment"> * in all copies or substantial portions of the Software.</span>
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<a name="l00013"></a>00013 <span class="comment"> *</span>
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<a name="l00014"></a>00014 <span class="comment"> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS</span>
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<a name="l00015"></a>00015 <span class="comment"> * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,</span>
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<a name="l00016"></a>00016 <span class="comment"> * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE</span>
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<a name="l00017"></a>00017 <span class="comment"> * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER</span>
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<a name="l00018"></a>00018 <span class="comment"> * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING</span>
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<a name="l00019"></a>00019 <span class="comment"> * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER</span>
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<a name="l00020"></a>00020 <span class="comment"> * DEALINGS IN THE SOFTWARE.</span>
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<a name="l00021"></a>00021 <span class="comment"> */</span>
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<a name="l00022"></a>00022
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<a name="l00023"></a>00023 <span class="preprocessor">#include "ChaseLEDs.h"</span>
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<a name="l00024"></a>00024 <span class="preprocessor">#if defined(ARDUINO) && ARDUINO >= 100</span>
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<a name="l00025"></a>00025 <span class="preprocessor"></span><span class="preprocessor">#include <Arduino.h></span>
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<a name="l00026"></a>00026 <span class="preprocessor">#else</span>
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<a name="l00027"></a>00027 <span class="preprocessor"></span><span class="preprocessor">#include <WProgram.h></span>
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<a name="l00028"></a>00028 <span class="preprocessor">#endif</span>
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<a name="l00029"></a>00029 <span class="preprocessor"></span>
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<a name="l00071"></a><a class="code" href="classChaseLEDs.html#ab6bb3da371d3730a6552e93a9b2eab78">00071</a> <a class="code" href="classChaseLEDs.html#ab6bb3da371d3730a6552e93a9b2eab78" title="Initializes the LED chaser.">ChaseLEDs::ChaseLEDs</a>(<span class="keyword">const</span> uint8_t *pins, <span class="keywordtype">int</span> num, <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> advanceTime)
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<a name="l00072"></a>00072 : _pins(pins)
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<a name="l00073"></a>00073 , _numPins(num)
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<a name="l00074"></a>00074 , _currentIndex(-1)
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<a name="l00075"></a>00075 , _advanceTime(advanceTime)
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<a name="l00076"></a>00076 , _lastChange(millis())
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<a name="l00077"></a>00077 {
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<a name="l00078"></a>00078 <span class="keywordflow">for</span> (uint8_t index = 0; index < _numPins; ++index) {
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<a name="l00079"></a>00079 pinMode(_pins[index], OUTPUT);
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<a name="l00080"></a>00080 digitalWrite(_pins[index], LOW);
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<a name="l00081"></a>00081 }
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<a name="l00082"></a>00082 }
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<a name="l00083"></a>00083
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<a name="l00087"></a><a class="code" href="classChaseLEDs.html#a8745fa6b9f33b6c6274a563dd4dea786">00087</a> <span class="keywordtype">void</span> <a class="code" href="classChaseLEDs.html#a8745fa6b9f33b6c6274a563dd4dea786">ChaseLEDs::loop</a>()
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<a name="l00088"></a>00088 {
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<a name="l00089"></a>00089 <span class="keywordflow">if</span> (_currentIndex >= 0) {
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<a name="l00090"></a>00090 <span class="keywordflow">if</span> ((millis() - _lastChange) >= _advanceTime) {
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<a name="l00091"></a>00091 <span class="comment">// Advance to the next LED in sequence.</span>
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<a name="l00092"></a>00092 _currentIndex = (_currentIndex + 1) % _numPins;
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<a name="l00093"></a>00093 _lastChange += _advanceTime;
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<a name="l00094"></a>00094 <a class="code" href="classChaseLEDs.html#aa0f4e0bd07dd65ee5574e894a612486b" title="Advances to the next LED in sequence, turning off prevPin, and turning on nextPin.">advance</a>(<a class="code" href="classChaseLEDs.html#a27c460fcb341c2dc2fcf9341616eb525" title="Returns the pin that is n steps back in the sequence.">previousPin</a>(1), _pins[_currentIndex]);
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<a name="l00095"></a>00095 }
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<a name="l00096"></a>00096 } <span class="keywordflow">else</span> {
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<a name="l00097"></a>00097 <span class="comment">// First time - light the first LED.</span>
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<a name="l00098"></a>00098 _currentIndex = 0;
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<a name="l00099"></a>00099 _lastChange = millis();
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<a name="l00100"></a>00100 <a class="code" href="classChaseLEDs.html#aa0f4e0bd07dd65ee5574e894a612486b" title="Advances to the next LED in sequence, turning off prevPin, and turning on nextPin.">advance</a>(<a class="code" href="classChaseLEDs.html#a27c460fcb341c2dc2fcf9341616eb525" title="Returns the pin that is n steps back in the sequence.">previousPin</a>(1), _pins[_currentIndex]);
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<a name="l00101"></a>00101 }
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<a name="l00102"></a>00102 }
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<a name="l00103"></a>00103
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<a name="l00136"></a><a class="code" href="classChaseLEDs.html#aa0f4e0bd07dd65ee5574e894a612486b">00136</a> <span class="keywordtype">void</span> <a class="code" href="classChaseLEDs.html#aa0f4e0bd07dd65ee5574e894a612486b" title="Advances to the next LED in sequence, turning off prevPin, and turning on nextPin.">ChaseLEDs::advance</a>(uint8_t prevPin, uint8_t nextPin)
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<a name="l00137"></a>00137 {
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<a name="l00138"></a>00138 digitalWrite(prevPin, LOW);
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<a name="l00139"></a>00139 digitalWrite(nextPin, HIGH);
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<a name="l00140"></a>00140 }
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<a name="l00141"></a>00141
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</pre></div></div>
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