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