#include "SevSeg.h"
SevSeg sevseg;
int pinBtnStart = 11, pinBtnPause = 10;
int state = 0; //0 - STOPPED, 1 - STARTED
unsigned long timestamp;
float time = 0;

void setup(){
  byte numDigits = 4;
  byte digitPins[] = {A0, A1, A2, A3};
  byte segmentPins[] = {4,9,3,5,7,6,8,2};
  bool resistorsOnSegments = false; 
  byte hardwareConfig = COMMON_CATHODE;
  bool updateWithDelays = false; 
  bool leadingZeros = false; 
  bool disableDecPoint = false; 
  sevseg.begin(hardwareConfig, numDigits, digitPins, segmentPins, resistorsOnSegments, updateWithDelays, leadingZeros, disableDecPoint);
  sevseg.setBrightness(90);
  sevseg.setNumberF(time, 1); 

  pinMode(pinBtnStart, INPUT_PULLUP); 
  pinMode(pinBtnPause, INPUT_PULLUP); 
}

void buttons(){
  if(digitalRead(pinBtnStart) == LOW){
    delay(20);
    if(digitalRead(pinBtnStart) == LOW){
      while(digitalRead(pinBtnStart) == LOW);
      state = 1;
      time = 0;
      timestamp = millis();
    }
  }

  if(digitalRead(pinBtnPause) == LOW){
    delay(20);
    if(digitalRead(pinBtnPause) == LOW){
      while(digitalRead(pinBtnPause) == LOW);
      state = !state;
      timestamp = millis();
    }
  }
}

void states(){
  if(state == 1 && millis() - timestamp >= 100){
    time += 0.1;
    timestamp = millis();
    sevseg.setNumberF(time, 1);
  }
}

void loop(){ 
  buttons();
  states() ;
  sevseg.refreshDisplay();
}