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74 lines
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74 lines
5.2 KiB
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<title>Bounce2: bounce_multiple.ino</title>
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<div class="title">bounce_multiple.ino</div> </div>
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<p>Detect the falling edge of multiple buttons. Eight buttons with internal pullups. Toggles a LED when any button is pressed. Buttons on pins 2,3,4,5,6,7,8,9</p>
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<div class="fragment"><div class="line">// Detect the falling edge of multiple buttons.</div><div class="line">// Eight buttons with internal pullups.</div><div class="line">// Toggles a LED when any button is pressed.</div><div class="line">// Buttons on pins 2,3,4,5,6,7,8,9</div><div class="line"></div><div class="line">// Include the Bounce2 library found here :</div><div class="line">// https://github.com/thomasfredericks/Bounce2</div><div class="line">#include <Bounce2.h></div><div class="line"></div><div class="line">#define LED_PIN 13</div><div class="line"></div><div class="line">#define NUM_BUTTONS 8</div><div class="line">const uint8_t BUTTON_PINS[NUM_BUTTONS] = {2, 3, 4, 5, 6, 7, 8, 9};</div><div class="line"></div><div class="line">int ledState = LOW;</div><div class="line"></div><div class="line">Bounce * buttons = new Bounce[NUM_BUTTONS];</div><div class="line"></div><div class="line">void setup() {</div><div class="line"></div><div class="line"> for (int i = 0; i < NUM_BUTTONS; i++) {</div><div class="line"> buttons[i].attach( BUTTON_PINS[i] , INPUT_PULLUP ); //setup the bounce instance for the current button</div><div class="line"> buttons[i].interval(25); // interval in ms</div><div class="line"> }</div><div class="line"></div><div class="line"> // Setup the LED :</div><div class="line"> pinMode(LED_PIN, OUTPUT);</div><div class="line"> digitalWrite(LED_PIN, ledState);</div><div class="line"></div><div class="line"></div><div class="line">}</div><div class="line"></div><div class="line">void loop() {</div><div class="line"></div><div class="line"> bool needToToggleLed = false;</div><div class="line"></div><div class="line"></div><div class="line"> for (int i = 0; i < NUM_BUTTONS; i++) {</div><div class="line"> // Update the Bounce instance :</div><div class="line"> buttons[i].update();</div><div class="line"> // If it fell, flag the need to toggle the LED</div><div class="line"> if ( buttons[i].fell() ) {</div><div class="line"> needToToggleLed = true;</div><div class="line"> }</div><div class="line"> }</div><div class="line"></div><div class="line"> // if a LED toggle has been flagged :</div><div class="line"> if ( needToToggleLed ) {</div><div class="line"> // Toggle LED state :</div><div class="line"> ledState = !ledState;</div><div class="line"> digitalWrite(LED_PIN, ledState);</div><div class="line"> }</div><div class="line"></div><div class="line"></div><div class="line">}</div><div class="line"></div></div><!-- fragment --> </div><!-- contents -->
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