// MCU BASIC: https://www.basic4mcu.com
// DateTime : 2018-12-12 오전 8:50:06
// by Ok-Hyun Park
//
#include <LiquidCrystal.h>
LiquidCrystal lcd(1,2,4,5,6,7);
//
const int irDetectPin=3; // FC-51 Pin 설정
const int touchss=13;    // Touchss Pin 설정
const int reset=10;      // 리셋 Pin 설정
//
bool flag=0;
unsigned long t_on=0,t_off=0,sum=0,t,tp;
//
void setup(){
  lcd.begin(16,2);
  lcd.print("Stopwatch: ");
  pinMode(irDetectPin,INPUT); // FC-51 입력으로 설정
  pinMode(touchss,INPUT);     // touch 입력으로 설정
  pinMode(reset,OUTPUT);      // 리셋 출력으로 설정
}
//
void loop(){
  int touch=digitalRead(touchss); // 터치센서 입력
  //
  if(touch)digitalWrite(reset,0); // 터치센서가 터치 안 될 경우 리셋 출력에 0
  else     digitalWrite(reset,1); // 터치센서가 터치 안 될 경우 리셋 출력에 1
  //-------------------------------------------------------------------------------------
  if(digitalRead(irDetectPin)==LOW){      // 적외선감지센서 입력
    if(flag==0){ flag=1; t_on=millis(); } // t_on 적외선감지 시작 시간
  }
  else{
    if(flag){ flag=0; t_off=millis();
      sum+=t_off-t_on; // 적외선감지 종료 시간을 sum 변수에 누적
    }
  }
  //----------------------
  if(flag){          // 적외선감지 중이라면
    t=millis();
    tp=sum+(t-t_on); // (t-t_on)는 적외선감지 시작 부터의 경과시간
    lcd.setCursor(0,1);
    lcd.print(tp/3600000); lcd.print("h: ");
    lcd.print(tp/60000);   lcd.print("m: ");
    lcd.print(tp/1000);    lcd.print("s");
  }
}
//
irDetectPin는 적외선 감지센서입니다.
이 적외선 감지센서에 감지가 되면 millis()가 동작하여 LCD에 나타나고,
감지가 풀리면 millis()가 일시정지하여 그 값을 유지하고 있다가,다시 센서에 감지되면 시작되는 코딩 수정좀 부탁드립니다..
(적외선감지센서를 스위치로 하는 스톱워치를 만들고 있습니다.)
지금은 감지센서의 감지여부에 따라 시간이 멈추긴 하지만,보이지 않는 곳에서 계속 시간이 돌아갑니다.