Initial commit

This is just the 2018 code configured for PlatformIO

lib/Bounce2/examples/bounce_multiple/bounce_multiple.ino

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