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arduino-cli/libraries/PinChangeInterrupt/examples/PinChangeInterrupt_Led/PinChangeInterrupt_Led.ino

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+/*
+  Copyright (c) 2014-2015 NicoHood
+  See the readme for credit to other people.
+
+  PinChangeInterrupt_TickTock
+  Demonstrates how to use the library
+
+  Connect a button/cable to pin 7 and ground.
+  The Led state will change if the pin state does.
+
+  PinChangeInterrupts are different than normal Interrupts.
+  See readme for more information.
+  Dont use Serial or delay inside interrupts!
+  This library is not compatible with SoftSerial.
+
+  The following pins are usable for PinChangeInterrupt:
+  Arduino Uno/Nano/Mini: All pins are usable
+  Arduino Mega: 10, 11, 12, 13, 50, 51, 52, 53, A8 (62), A9 (63), A10 (64),
+              A11 (65), A12 (66), A13 (67), A14 (68), A15 (69)
+  Arduino Leonardo/Micro: 8, 9, 10, 11, 14 (MISO), 15 (SCK), 16 (MOSI)
+  HoodLoader2: All (broken out 1-7) pins are usable
+  Attiny 24/44/84: All pins are usable
+  Attiny 25/45/85: All pins are usable
+  Attiny 13: All pins are usable
+  Attiny 441/841: All pins are usable
+  ATmega644P/ATmega1284P: All pins are usable
+*/
+
+#include "PinChangeInterrupt.h"
+
+// Choose a valid PinChangeInterrupt pin of your Arduino board
+#define pinBlink 7
+
+void setup() {
+  // set pin to input with a pullup, led to output
+  pinMode(pinBlink, INPUT_PULLUP);
+  pinMode(LED_BUILTIN, OUTPUT);
+
+  // Manually blink once to test if LED is functional
+  blinkLed();
+  delay(1000);
+  blinkLed();
+
+  // Attach the new PinChangeInterrupt and enable event function below
+  attachPCINT(digitalPinToPCINT(pinBlink), blinkLed, CHANGE);
+}
+
+void blinkLed(void) {
+  // Switch Led state
+  digitalWrite(LED_BUILTIN, !digitalRead(LED_BUILTIN));
+}
+
+void loop() {
+  // Nothing to do here
+}