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147 lines
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147 lines
6.4 KiB
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<title>Bounce2: bounce_basic.ino</title>
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<div id="projectname">Bounce2
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</div>
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<div class="header">
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<div class="headertitle">
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<div class="title">bounce_basic.ino</div> </div>
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</div><!--header-->
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<div class="contents">
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<p>Basic example of the <a class="el" href="class_bounce.html" title="The Debouncer:Bounce class. Links the Deboucing class to a hardware pin. This class is odly named,...">Bounce</a> class.</p>
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<div class="fragment"><div class="line"> </div>
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<div class="line">/*</div>
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<div class="line"> DESCRIPTION</div>
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<div class="line"> ====================</div>
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<div class="line"> Simple example of the Bounce library that switches a LED when</div>
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<div class="line"> a state change (from HIGH to LOW) is triggered (for example when a button is pressed).</div>
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<div class="line"> </div>
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<div class="line"> Set BOUNCE_PIN to the pin attached to the input (a button for example).</div>
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<div class="line"> Set LED_PIN to the pin attached to a LED.</div>
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<div class="line"> </div>
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<div class="line">*/</div>
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<div class="line"> </div>
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<div class="line">// WE WILL attach() THE Bounce INSTANCE TO THE FOLLOWING PIN IN setup()</div>
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<div class="line">#define BOUNCE_PIN 2</div>
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<div class="line"> </div>
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<div class="line">// DEFINE THE PIN FOR THE LED :</div>
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<div class="line">// 1) SOME BOARDS HAVE A DEFAULT LED (LED_BUILTIN)</div>
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<div class="line">#define LED_PIN LED_BUILTIN</div>
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<div class="line">// 2) OTHERWISE SET YOUR OWN PIN</div>
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<div class="line">// #define LED_PIN 13</div>
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<div class="line"> </div>
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<div class="line">// Include the Bounce2 library found here :</div>
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<div class="line">// https://github.com/thomasfredericks/Bounce2</div>
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<div class="line">#include <Bounce2.h></div>
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<div class="line"> </div>
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<div class="line"> </div>
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<div class="line">// INSTANTIATE A Bounce OBJECT</div>
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<div class="line">Bounce bounce = Bounce();</div>
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<div class="line"> </div>
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<div class="line">// SET A VARIABLE TO STORE THE LED STATE</div>
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<div class="line">int ledState = LOW;</div>
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<div class="line"> </div>
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<div class="line">void setup() {</div>
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<div class="line"> </div>
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<div class="line"> // BOUNCE SETUP</div>
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<div class="line"> </div>
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<div class="line"> // SELECT ONE OF THE FOLLOWING :</div>
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<div class="line"> // 1) IF YOUR INPUT HAS AN INTERNAL PULL-UP</div>
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<div class="line"> bounce.attach( BOUNCE_PIN , INPUT_PULLUP ); // USE INTERNAL PULL-UP</div>
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<div class="line"> // 2) IF YOUR INPUT USES AN EXTERNAL PULL-UP</div>
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<div class="line"> //bounce.attach( BOUNCE_PIN, INPUT ); // USE EXTERNAL PULL-UP</div>
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<div class="line"> </div>
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<div class="line"> // DEBOUNCE INTERVAL IN MILLISECONDS</div>
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<div class="line"> bounce.interval(5); // interval in ms</div>
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<div class="line"> </div>
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<div class="line"> // LED SETUP</div>
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<div class="line"> pinMode(LED_PIN, OUTPUT);</div>
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<div class="line"> digitalWrite(LED_PIN, ledState);</div>
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<div class="line"> </div>
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<div class="line">}</div>
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<div class="line"> </div>
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<div class="line">void loop() {</div>
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<div class="line"> // Update the Bounce instance (YOU MUST DO THIS EVERY LOOP)</div>
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<div class="line"> bounce.update();</div>
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<div class="line"> </div>
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<div class="line"> // <Bounce>.changed() RETURNS true IF THE STATE CHANGED (FROM HIGH TO LOW OR LOW TO HIGH)</div>
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<div class="line"> if ( bounce.changed() ) {</div>
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<div class="line"> // THE STATE OF THE INPUT CHANGED</div>
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<div class="line"> // GET THE STATE</div>
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<div class="line"> int deboucedInput = bounce.read();</div>
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<div class="line"> // IF THE CHANGED VALUE IS LOW</div>
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<div class="line"> if ( deboucedInput == LOW ) {</div>
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<div class="line"> ledState = !ledState; // SET ledState TO THE OPPOSITE OF ledState</div>
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<div class="line"> digitalWrite(LED_PIN,ledState); // WRITE THE NEW ledState</div>
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<div class="line"> }</div>
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<div class="line"> }</div>
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<div class="line"> </div>
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<div class="line"> </div>
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<div class="line"> </div>
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<div class="line">}</div>
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