#include "SevSeg.h"
SevSeg sevseg; //Instantiate a seven segment controller object
unsigned long timer;
int deciSeconds;

void setup() {
  pinMode(1, INPUT);
  byte numDigits = 4;
  byte digitPins[] = {2, 3, 4, 5};
  byte segmentPins[] = {6, 7, 8, 9, 10, 11, 12, 13};
  bool resistorsOnSegments = false; // 'false' means resistors are on digit pins
  byte hardwareConfig = COMMON_ANODE; // See README.md for options
  bool updateWithDelays = false; // Default 'false' is Recommended
  bool leadingZeros = false; // Use 'true' if you'd like to keep the leading zeros
  bool disableDecPoint = false; // Use 'true' if your decimal point doesn't exist or isn't connected

  sevseg.begin(hardwareConfig, numDigits, digitPins, segmentPins, resistorsOnSegments,
  updateWithDelays, leadingZeros, disableDecPoint);
  sevseg.setBrightness(90);
}

void loop() {
  if (digitalRead(1) == HIGH) { // when click, start the stopwatch.
    delay(200); // add delay to ensure the programming goes to next line, bacause clicking the button takes much longer time than the programming.
    stopwatch();
  }
  sevseg.setNumber(deciSeconds, 1); // this will save the time we stopped and display.
  sevseg.refreshDisplay();
}

void stopwatch() {
  timer = millis();
  deciSeconds=0; // reset the stopwatch to 0.
  while (1) {
    if (digitalRead(1) == HIGH) { // when click, stop the stopwatch.
      delay(200);
      break;
    }

    if (millis() - timer >= 100) {
      timer += 100;
      deciSeconds++; // 100 milliSeconds is equal to 1 deciSecond

      if (deciSeconds == 10000) { // Reset to 0 after counting for 1000 seconds.
        deciSeconds=0;
      }
      sevseg.setNumber(deciSeconds, 1);
    }

    sevseg.refreshDisplay(); // Must run repeatedly
  }
}

/// END ///