/*

tlacitka
tl1 pin Digital 5
tl2 pin Digital 6
relatko Digital 4  spoust
relatko Digital 7  naslap
display 
sda A4
sdl A5
*/

#include <Wire.h>  //nutne pro pripojeni displaye ---nevim
#include <LiquidCrystal_I2C.h> //vlozeni knihovny pro LCD display


//Nastaveni zapojeni talcitek  a relatka
  int tl_status;
  int tl2_status;
  int tl1=5;
  int tl2=6;
  byte rele=4;
  byte naslap=7;        //promena pro namacknuti spouste (ostreni, expozice atd.)
//promene pro ulozeni casu mezi snimky a pocet snimku
  int mezicas=3;
  int pocet=10;
//promena pro urceni zda je nastaveno
  int setok=0;  
//cyklus promena pro vypocet millis +mezicas
    int totokolo; 
  //inicializace LCD
  LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE); //inicializace LCD zapojeni je zapojeni LCD, GND 0V, VCC 5V, SDA A4, SCL A5


void setup() {
  // Setup LCD to 16x2 characters
  lcd.begin(16, 2);
  
  //Uvitani
  lcd.setCursor(0, 0);
  lcd.print("CASOSBER");
  delay(1000);
  lcd.clear();
  

   //nastaveni pinu pro tlacitka
  pinMode (tl1, INPUT_PULLUP);
  pinMode (tl2, INPUT_PULLUP);
  pinMode (rele, OUTPUT);
  pinMode (naslap, OUTPUT);
  digitalWrite (rele, LOW);
  digitalWrite (naslap, LOW);
} 
void loop() {       
  if (setok==0) {            //kdyz neni nastavencasosber preskoc do nastaven
    lcd.clear();
    lcd.setCursor(0, 0);
  lcd.print("vteriny");
  lcd.setCursor(0, 1);
  lcd.print("pocet");
  lcd.setCursor(14,0);   //nastaveni blikaciho kurzoru u vterin
  lcd.blink();
  tl_status=digitalRead(tl1);
  while (tl_status == HIGH) {
        lcd.setCursor(10, 1);
      lcd.print(pocet);
        tl2_status=digitalRead(tl2);
        if (tl2_status == LOW) {
      mezicas=mezicas+1;
        }
      if (mezicas>100) {
      mezicas=3;
      lcd.setCursor(14,0);
      lcd.print("   ");
      }
     lcd.setCursor(14,0);
  lcd.print(mezicas);
    delay (200);
  tl_status=digitalRead(tl1);
        }
  
   lcd.setCursor(10,1);   //nastaveni blikaciho kurzoru u poctu
   lcd.blink();
   delay (2000);
   tl_status=digitalRead(tl1);
   while (tl_status == HIGH) {
        tl2_status=digitalRead(tl2);
        if (tl2_status == LOW) {
      pocet=pocet+10;
        }
      if (pocet>3000) {
      pocet=0;
      }
           
     lcd.setCursor(10,1);
  lcd.print(pocet);
  tl_status=digitalRead(tl1);
  delay (200);
    setok=1;
    
      }
      delay(300);
}
    lcd.noBlink();
    long cas=millis()/1000;       //pro millis
      lcd.setCursor(8, 0);
      lcd.print("Exp");
    if (cas >= totokolo) {
      totokolo=cas+mezicas;
      digitalWrite (naslap, HIGH);
      delay(1000);
      digitalWrite (rele, HIGH);
      delay (300);
      digitalWrite (rele, LOW);
      digitalWrite (naslap, LOW);
      pocet=pocet-1;
      lcd.setCursor(10,1);
      lcd.print("     ");
      lcd.setCursor(10, 1);
      lcd.print(pocet);
    if (pocet <= 0)  {
      setok=0;
    }
    tl_status=digitalRead(tl1);
    tl2_status=digitalRead(tl2);
    if (tl_status ==LOW && tl2_status ==LOW) {setok=0;}   //kdyz zmacknu obe tlacitka dostanu se do nastaveni
   }
    
}