/**
   FlashingLedMethods.ino
      by Matthew Ford,  2020/01/27
   (c)2019 Forward Computing and Control Pty. Ltd.
   NSW, Australia  www.forward.com.au
*/
// this sketch runs on Uno and most other Arduino boards
// it uses millisDelay from https://www.forward.com.au/pfod/ArduinoProgramming/TimingDelaysInArduino.html
// download and install the millisDelay library https://www.forward.com.au/pfod/ArduinoProgramming/millisDelay.zip
#include "millisDelay.h"

int pin; // compiler defaults to 0 if not otherwise set
bool pinHigh; // compiler defaults to false if not otherwise set, is the pin High or Low 

millisDelay pinToggleDelay;
unsigned long PIN_TOGGLE_DELAY_MS = 1000; // on/delay in mS == 1sec

millisDelay stopTogglingDelay;
unsigned long STOP_TOGGLING_DELAY_MS = 8000; // stop flashing in 8sec

void startTogglingPin() {
  pinToggleDelay.start(PIN_TOGGLE_DELAY_MS); // start led flash delay
  digitalWrite(pin, HIGH); // turn led on
  pinHigh = true; // on
}

void stopTogglingPin() {
  pinToggleDelay.stop(); // stop the led flash delay
  digitalWrite(pin, LOW); // turn led off
  pinHigh = false; // off
}

void togglePinInit(int pinNo) {
  pin = pinNo;
  pinMode(pin, OUTPUT); // set output
  stopTogglingPin();
}

void handleTogglingPin() {
  if (pinToggleDelay.justFinished()) {
    pinToggleDelay.restart(); // restart it
    pinHigh = !pinHigh; // toggle pinHigh
    if (pinHigh) {
      digitalWrite(pin, HIGH); // turn on
    } else {
      digitalWrite(pin, LOW); // turn off
    }
  }
}

void setup() {
  togglePinInit(13); // built in led
  startTogglingPin();
  stopTogglingDelay.start(STOP_TOGGLING_DELAY_MS);
}

void loop() {
  handleTogglingPin();  // check if led should be toggled
  if (stopTogglingDelay.justFinished()) {
    stopTogglingPin();
  }
}