#include "displ.h"
#include "kasa.h"

byte step = 0;

byte isbtnpsd = 0;
byte isbtnack = 0;

byte zadaniekusov = 0; // zadáva sa počet kusov, PLU, alebo cena?
byte pocetstlacenitlacidlaplu = 0;  // počet stláčení tlačidla PLU

String psdbtn = "";

unsigned long pastms = 0;
unsigned long pastms2 = 0;
unsigned long pastms3 = 0;
unsigned long pastus = 0;

unsigned long noDetectTime = 0;

byte ison = 1;

void setup() {

  zadanecislo = 0;

  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, INPUT_PULLUP);
  pinMode(7, INPUT_PULLUP);
  pinMode(8, INPUT_PULLUP);
  pinMode(9, INPUT_PULLUP);
  pinMode(10, INPUT_PULLUP);
  pinMode(11, INPUT_PULLUP);
  pinMode(a, OUTPUT);
  pinMode(b, OUTPUT);
  pinMode(c, OUTPUT);
  pinMode(d, OUTPUT);
  pinMode(e, OUTPUT);
  pinMode(f, OUTPUT);
  pinMode(g, OUTPUT);
  pinMode(one, OUTPUT);
  pinMode(ten, OUTPUT);
  pinMode(hund, OUTPUT);
  pinMode(thou, OUTPUT);
  pinMode(tetho, OUTPUT);
  pinMode(hutho, OUTPUT);
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
  digitalWrite(one, HIGH);
  digitalWrite(ten, HIGH);
  digitalWrite(hund, HIGH);
  digitalWrite(thou, HIGH);
  digitalWrite(tetho, HIGH);
  digitalWrite(hutho, HIGH);
  digitalWrite(38, HIGH);
  pinMode(38, OUTPUT);
  for(int i = 25; i < 28; i = i + 1) {
    pinMode(i, OUTPUT);
    digitalWrite(i, HIGH);
  }
  for(int i = 31; i < 38; i = i + 1) {
    pinMode(i, OUTPUT);
    digitalWrite(i, HIGH);
  }
  pinMode(29, OUTPUT); // battery indicator (one color, lights up when bat voltage < 3.2V)
  pinMode(30, OUTPUT);
  delay(100);
  Serial.begin(9600);
  num = (analogRead(A0) / 0.2047f) * 100;  // measures and shows batt voltage
  if(num < 3200) {digitalWrite(29, HIGH);} else {digitalWrite(29, LOW);}
  pastms = millis();
  pastus = micros();
  wait(1000);
}

void loop() {

if(zadanieplu >= 1) {
zadanecislo = zadanecislo % 1000000;
} else if((!zadanieplu)) {
zadanecislo = zadanecislo % 1000000000;
num2 = (zadanecislo / 1000000) % 1000;
}

if((!zadanieplu)) {
  zadanacena = zadanecislo / 100.00f;
  num = zadanecislo % 1000000;
} else if(zadanieplu == 1) {cisloplu = zadanecislo;} else if(zadanieplu == 2) {zadanemnozstvo = zadanecislo;}
  else if (cenacelkom > 0.00f) {num = cenacelkom * 100.00f;}

  if(zadanieplu == 1) {zadanecislo = zadanecislo % 1000; num2 = zadanecislo;}
  if(zadanieplu == 2) {num = zadanecislo; num2 = cisloplu;}

  if(jetranzakcia == 2 && (!vydavok)) {hotovost = zadanecislo / 100.0f; num = zadanecislo;}
  if(jetranzakcia == 2 && (vydavok)) {num = vydavok * 100.0f;}

  int ubat = analogRead(A0) / 0.2047f;
  if(ubat < 3200 && ison) {digitalWrite(29, HIGH);} else if(ubat > 3800 && ison) {digitalWrite(29, LOW);}

  if(!digitalRead(6) && !digitalRead(2)) {psdbtn = "c/ON"; isbtnpsd = 1;}  // obvious: clear/on (short press/long press)
  else if(!digitalRead(6) && !digitalRead(3)) {psdbtn = "#/OFF"; isbtnpsd = 1;}  // no sale / off (short press/long press)
  else if(!digitalRead(7) && !digitalRead(2)) {psdbtn = "7"; isbtnpsd = 1;}
  else if(!digitalRead(7) && !digitalRead(3)) {psdbtn = "4"; isbtnpsd = 1;}
  else if(!digitalRead(7) && !digitalRead(4)) {psdbtn = "1"; isbtnpsd = 1;}
  else if(!digitalRead(8) && !digitalRead(2)) {psdbtn = "8"; isbtnpsd = 1;}
  else if(!digitalRead(8) && !digitalRead(3)) {psdbtn = "5"; isbtnpsd = 1;}
  else if(!digitalRead(8) && !digitalRead(4)) {psdbtn = "2"; isbtnpsd = 1;}
  else if(!digitalRead(8) && !digitalRead(5)) {psdbtn = "0"; isbtnpsd = 1;}
  else if(!digitalRead(9) && !digitalRead(2)) {psdbtn = "9"; isbtnpsd = 1;}
  else if(!digitalRead(9) && !digitalRead(3)) {psdbtn = "6"; isbtnpsd = 1;}
  else if(!digitalRead(9) && !digitalRead(4)) {psdbtn = "3"; isbtnpsd = 1;}
  else if(!digitalRead(9) && !digitalRead(5)) {psdbtn = "00"; isbtnpsd = 1;}  // two zeros (just like adding machines have it)
  else if(!digitalRead(10) && !digitalRead(2)) {psdbtn = "x/↑"; isbtnpsd = 1;}  // x report (+ something else?)
  else if(!digitalRead(10) && !digitalRead(3)) {psdbtn = "plu"; isbtnpsd = 1;}  // product look-up
  else if(!digitalRead(10) && !digitalRead(4)) {psdbtn = "a2"; isbtnpsd = 1;}  // idk, someone educate
  else if(!digitalRead(10) && !digitalRead(5)) {psdbtn = "a1"; isbtnpsd = 1;}  // idk
  else if(!digitalRead(11) && !digitalRead(2)) {psdbtn = "s/-"; isbtnpsd = 1;}  // sale void/return
  else if(!digitalRead(11) && !digitalRead(3)) {psdbtn = "perc"; isbtnpsd = 1;}  // percentage (press after inputted value, so 123, %, and it'll show 1.23)
  else if(!digitalRead(11) && !digitalRead(4)) {psdbtn = "st";  isbtnpsd = 1;}  // subtotal (before tax, discounts, or rounding to nearest 0,05€?)
  else if(!digitalRead(11) && !digitalRead(5)) {psdbtn = "tl";  isbtnpsd = 1;}  // total (after tax? We have tax baked into the price in Europe, no?)
  else {isbtnpsd = 0;}

  switch(step) {

    case 0:
      digitalWrite(2, LOW);
      digitalWrite(3, HIGH);
      digitalWrite(4, HIGH);
      digitalWrite(5, HIGH);
      break;

    case 1:
      digitalWrite(3, LOW);
      digitalWrite(2, HIGH);
      digitalWrite(4, HIGH);
      digitalWrite(5, HIGH);
      break;

    case 2:
      digitalWrite(4, LOW);
      digitalWrite(3, HIGH);
      digitalWrite(5, HIGH);
      digitalWrite(2, HIGH);
      break;

    case 3:
      digitalWrite(5, LOW);
      digitalWrite(3, HIGH);
      digitalWrite(4, HIGH);
      digitalWrite(2, HIGH);
      break;

    case 4:
      step = 254;
      break;

  }


if(isbtnpsd && (! isbtnack)) {
if((!(ison)) && psdbtn != "c/ON") {return;}
    isbtnack = 1;
    buttonprocess();
} else if((! isbtnpsd) && isbtnack) {
    // Only reset after 20ms of no detection (full scan cycles)
    if(noDetectTime == 0) noDetectTime = millis();
    if(millis() - noDetectTime > 20) {
        isbtnack = 0;
        noDetectTime = 0;
    }
} else if(isbtnpsd && isbtnack) {
    noDetectTime = 0;  // Reset timer if button detected again
}


  step = step + 1;
  dodisp();
  dodisp2();
  if((! ison)) {
    nezobraz();
    zobraz = -2;
    zobraz2 = -2;
    digitalWrite(a2, HIGH);
    digitalWrite(b2, HIGH);
    digitalWrite(c2, HIGH);
    digitalWrite(d2, HIGH);
    digitalWrite(e2, HIGH);
    digitalWrite(f2, HIGH);
    digitalWrite(g2, HIGH);
    digitalWrite(29, LOW);
    delay(1);
    keepoff();
    }

}

void buttonprocess() {

if(psdbtn == "1") {
  numplace(1);
} else if(psdbtn == "2") {
  numplace(2);
} else if(psdbtn == "3") {
  numplace(3);
} else if(psdbtn == "4") {
  numplace(4);
} else if(psdbtn == "5") {
  numplace(5);
} else if(psdbtn == "6") {
  numplace(6);
} else if(psdbtn == "7") {
  numplace(7);
} else if(psdbtn == "8") {
  numplace(8);
} else if(psdbtn == "9") {
  numplace(9);
} else if(psdbtn == "0") {
  numplace(0);
} else if(psdbtn == "00") {
  numplace(0);
  numplace(0);
} else if(psdbtn == "c/ON") {

  if((! ison)) {ison = 1; turnon();} else if(jetranzakcia == 2 && (!zadanecislo)) {turnon();} else {zadanecislo = 0;}

} else if(psdbtn == "#/OFF") {

  if(ison == 1) {ison = 0;}

} else if(psdbtn == "x/↑") {  // prints a demo
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
  Serial.print("HRZ-50/Sk prenosna pokladnica");
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
  Serial.print("Moderna edicia Arduino");
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
  Serial.print("Jedna z limit.: Dokaze");
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
  Serial.print("stornovat len poslednu");
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
  Serial.print("polozku, pricom treba vydat");
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
  Serial.print("neplatny doklad ako stornaciu");
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
  Serial.print("viacerych poloziek.");
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
} else if(psdbtn == "plu") {
  if(zadanieplu == 1) {zadanieplu = 2; zadajplu();} else if(zadanieplu == 0 && (!zadanecislo)) {zadanieplu = 1;} else if(zadanieplu == 2) {zadanieplu = 0; zadanecislo = 0;}
  else if((zadanieplu == 0) && zadanecislo) {cisloplu = zadanecislo; zadajplu(); zadanieplu = 2;}
} else if(psdbtn == "a2") {
  jehotovost = 0;  // platba je kartou, nezaokrúhluj
  if(vydavok) {cenacelkom = vydavok; vydavok = 0;}
} else if(psdbtn == "a1") {
  jehotovost = 1;  // platba je hotovosťou, zaokrúhluj

    if(jetranzakcia == 2) {vydavok = abs((hotovost - cenacelkom)); zadanecislo = 0;}
    long vydcenty = vydavok * 100.0f;
    while(vydcenty % 5) {vydcenty = vydcenty + 1;}
    vydavok = vydcenty / 100.0f;

} else if(psdbtn == "s/-") {
  Serial.print("Storno polozky.     ");
  String msgc1 = String((0.00f - cenariadok));
  Serial.print(msgc1);
  Serial.write(10);
  cenacelkom = cenacelkom - cenariadok;
  cenariadok = 0;
} else if(psdbtn == "perc") {
  
} else if(psdbtn == "st") {
  if((!jetranzakcia)) {jetranzakcia = 1;}
  if((!zadanieplu)) {
    cenacelkom = cenacelkom + zadanacena;
    String msg = "Nekonkretne";
    String msg2 = String(zadanacena);
    while(((msg.length() + msg2.length())) < 30) {msg += " "; msg.length();}
    Serial.print((msg += msg2));
  Serial.write(10);
    cenariadok = zadanacena;
    zadanacena = 0;
  } else if(zadanieplu) {
    cenariadok = (cenapolozka * zadanemnozstvo);
  cenacelkom = cenacelkom + cenariadok;
    String polozka = plutovar[cisloplu];
    String msgd1 = " ";
    msgd1 = msgd1 += String(zadanemnozstvo);
    String msgd2 = String((zadanemnozstvo * cenapolozka));
    String msgd3 = polozka += msgd1 += "ks ";
    while(polozka.length() < 18) {polozka = polozka += " ";}
    while((msgd3.length() + msgd2.length()) < 30) {msgd3 = msgd3 += " ";}
    Serial.print(msgd3 += msgd2);
  Serial.write(10);
  }
  
  num = cenacelkom * 100;

  if(zadanieplu == 2) {zadanieplu = 0;}
  zadanecislo = 0;
} else if(psdbtn == "tl") {

 // if(jetranzakcia == 2) {digitalWrite(38, LOW);}

  String msgn1 = "Subtotal bez dane: ";
  String msgn2 = String(cenacelkom);
  String msgn3 = "Celkom: ";
  String msgn4 = "Sadzba DPH: ";
  String msgn7 = "Zaokruhlenie: ";
  cenadane = cenacelkom * (pgm_read_float(&dph));
  String msgn5 = String(cenadane);
  cenacelkom = cenacelkom * (pgm_read_float(&multprezdanenie));
  float cenapzaokr = cenacelkom;
  if(jehotovost == 1) {
    long centy = 100 * cenacelkom;
    while(centy % 5) {centy = centy + 1;}
    cenacelkom = centy / 100.00f;
  }
  zaokruhlenie = cenacelkom - cenapzaokr;

  String msgn6 = String(cenacelkom);

  String msgn8 = String(zaokruhlenie);

  Serial.print("-  -  -  -  -  -  -  -  -  -");
  Serial.write(10);
  num = cenacelkom * 100.00f;
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
  Serial.print(((msgn1) += (msgn2)));
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
  Serial.print(((msgn4) += (msgn5)));
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
  Serial.print(((msgn7) += (msgn8)));
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
  Serial.print(((msgn3) += (msgn6)));
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
  if(jehotovost == 1) {
    Serial.print("Platba bola realizovana hotovostou.");
  } else if((!jehotovost)) {
    Serial.print("Platba bola realizovana bezhotovostne.");
  } else {
    Serial.print("       NEPLATNY DOKLAD!");
  }
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 1100) {dodisp(); dodisp2();}
  Serial.print("Dakujeme za Vas nakup, pridte zas.");
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 1100) {dodisp(); dodisp2();}
  Serial.print(" ");
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
  Serial.print(" ");
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
  Serial.print("        TOPAZ s. r. o.");
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
  Serial.print("Podnik: Mesto123456");
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
  Serial.print("IcDPH: 12345678901234");
  Serial.write(10);
  pastms3 = millis(); while(millis() - pastms3 < 600) {dodisp(); dodisp2();}
  Serial.print("Tel. cislo: 0912345678");
  Serial.write(10);

  if(jehotovost == 1 && jetranzakcia == 1) {
    jetranzakcia = 2;
  } else if((!jehotovost) || jehotovost == 2) {Serial.end(); digitalWrite(38, LOW);}

}

}

void wait(unsigned long time) {
  while(millis() - pastms < time) {dodisp();}  // shows batt voltage for 5 seconds
  num = 0;
  dodisp();
  pastms = millis();
  pastus = micros();
}

void dodisp2() {
  cislo2sto = ((num2 / 100) % 10);
  cislo2desat = ((num2 / 10) % 10);
  cislo2 = num2 % 10;
if(micros() - pastus > 5000) {
  zobraz2 = zobraz2 + 1;
  pastus = micros();
  digitalWrite(a2, HIGH);
  digitalWrite(b2, HIGH);
  digitalWrite(c2, HIGH);
  digitalWrite(d2, HIGH);
  digitalWrite(e2, HIGH);
  digitalWrite(f2, HIGH);
  digitalWrite(g2, HIGH);
}

  if(zobraz2 >= 3) {zobraz2 = -1;}

  switch(zobraz2) {

    case 0:
    zobraz2cislo = cislo2sto;
    digitalWrite(one2, HIGH);
    digitalWrite(ten2, HIGH);
    digitalWrite(hun2, LOW);
      break;

    case 1:
    zobraz2cislo = cislo2desat;
    digitalWrite(one2, HIGH);
    digitalWrite(hun2, HIGH);
    digitalWrite(ten2, LOW);
      break;

    case 2:
    zobraz2cislo = cislo2;
    digitalWrite(hun2, HIGH);
    digitalWrite(ten2, HIGH);
    digitalWrite(one2, LOW);
      break;

    case -1:
    digitalWrite(hun2, HIGH);
    digitalWrite(ten2, HIGH);
    digitalWrite(one2, HIGH);
      break;

  }

  switch(zobraz2cislo) {

    case 0:
      digitalWrite(a2, LOW);
      digitalWrite(b2, LOW);
      digitalWrite(c2, LOW);
      digitalWrite(d2, LOW);
      digitalWrite(e2, LOW);
      digitalWrite(f2, LOW);
      digitalWrite(g2, HIGH);
      break;

    case 1:
      digitalWrite(a2, HIGH);
      digitalWrite(b2, LOW);
      digitalWrite(c2, LOW);
      digitalWrite(d2, HIGH);
      digitalWrite(e2, HIGH);
      digitalWrite(f2, HIGH);
      digitalWrite(g2, HIGH);
      break;

    case 2:
      digitalWrite(a2, LOW);
      digitalWrite(b2, LOW);
      digitalWrite(c2, HIGH);
      digitalWrite(d2, LOW);
      digitalWrite(e2, LOW);
      digitalWrite(f2, HIGH);
      digitalWrite(g2, LOW);
      break;

    case 3:
      digitalWrite(a2, LOW);
      digitalWrite(b2, LOW);
      digitalWrite(c2, LOW);
      digitalWrite(d2, LOW);
      digitalWrite(e2, HIGH);
      digitalWrite(f2, HIGH);
      digitalWrite(g2, LOW);
      break;

    case 4:
      digitalWrite(a2, HIGH);
      digitalWrite(b2, LOW);
      digitalWrite(c2, LOW);
      digitalWrite(d2, HIGH);
      digitalWrite(e2, HIGH);
      digitalWrite(f2, LOW);
      digitalWrite(g2, LOW);
      break;

    case 5:
      digitalWrite(a2, LOW);
      digitalWrite(b2, HIGH);
      digitalWrite(c2, LOW);
      digitalWrite(d2, LOW);
      digitalWrite(e2, HIGH);
      digitalWrite(f2, LOW);
      digitalWrite(g2, LOW);
      break;

    case 6:
      digitalWrite(a2, LOW);
      digitalWrite(b2, HIGH);
      digitalWrite(c2, LOW);
      digitalWrite(d2, LOW);
      digitalWrite(e2, LOW);
      digitalWrite(f2, LOW);
      digitalWrite(g2, LOW);
      break;

    case 7:
      digitalWrite(a2, LOW);
      digitalWrite(b2, LOW);
      digitalWrite(c2, LOW);
      digitalWrite(d2, HIGH);
      digitalWrite(e2, HIGH);
      digitalWrite(f2, HIGH);
      digitalWrite(g2, HIGH);
      break;

    case 8:
      digitalWrite(a2, LOW);
      digitalWrite(b2, LOW);
      digitalWrite(c2, LOW);
      digitalWrite(d2, LOW);
      digitalWrite(e2, LOW);
      digitalWrite(f2, LOW);
      digitalWrite(g2, LOW);
      break;

    case 9:
      digitalWrite(a2, LOW);
      digitalWrite(b2, LOW);
      digitalWrite(c2, LOW);
      digitalWrite(d2, LOW);
      digitalWrite(e2, HIGH);
      digitalWrite(f2, LOW);
      digitalWrite(g2, LOW);
      break;

  }

}

void dodisp() {

  present2 = micros();

  if (num <= 9) {
    cislodesat = 0;
    cislodesat2 = 0;
    cislosto = 0;
    cislosto2 = 0;
    cislotisic = 0;
    cislotisic2 = 0;
    cislodesattisic = 0;
    cislodesattisic2 = 0;
    cislostotisic = 0;
    cislo = num;
  }

  if (num > 9) {
    cislodesat = num / 10;
    cislosto = num / 100;
    cislotisic = num / 1000;
    cislodesattisic = num / 10000;
    cislostotisic = num / 100000;
    intermid = cislodesat * 10;
    intermid2 = cislosto * 10;
    intermid3 = cislotisic * 10;
    intermid4 = cislodesattisic * 10;
    intermid5 = cislostotisic * 10;
    cislodesat2 = cislodesat - intermid2;
    cislosto2 = cislosto - intermid3;
    cislotisic2 = cislotisic - intermid4;
    cislodesattisic2 = cislodesattisic - intermid5;
    cislo = num - intermid;
  }

  if (present2 - past2 >= 2500) {
    nezobraz();
    zobraz = zobraz + 1;

    switch (zobraz) {

      case 0:
        c = 14;
        d = 15;
        zobrazCislo = cislostotisic;
        zsts();
        break;

      case 1:
        zobrazCislo = cislodesattisic2;
        zdts();
        break;

      case 2:
        zobrazCislo = cislotisic2;
        ztis();
        break;

      case 3:
        zobrazCislo = cislosto2;
        if((!zadanieplu)) {
        digitalWrite(30, LOW);
        } else {digitalWrite(30, HIGH);}
        zsto();
        break;

      case 4:
        zobrazCislo = cislodesat2;
        digitalWrite(30, HIGH);
       // c = 15;
//        d = 14;  // do not forget to uncomment dynamic rewiring if you need it irl
        zdst();
        break;

      case 5:
        zobrazCislo = cislo;
  //      c = 15;
    //    d = 14;
        zjdn();
        break;

    }

    if (zobraz >= 6) {
      zobraz = -1;
    }

    past2 = present2;

  }

  switch (zobrazCislo) {

    case 0:
      z0();
      break;

    case 1:
      z1();
      break;

    case 2:
      z2();
      break;

    case 3:
      z3();
      break;

    case 4:
      z4();
      break;

    case 5:
      z5();
      break;

    case 6:
      z6();
      break;

    case 7:
      z7();
      break;

    case 8:
      z8();
      break;

    case 9:
      z9();
      break;

  }

}

void z1() {
  digitalWrite(a, HIGH);
  digitalWrite(b, LOW);
  digitalWrite(c, LOW);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
}

void z2() {
  digitalWrite(a, LOW);
  digitalWrite(b, LOW);
  digitalWrite(c, HIGH);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, HIGH);
  digitalWrite(g, LOW);
}

void z3() {
  digitalWrite(a, LOW);
  digitalWrite(b, LOW);
  digitalWrite(c, LOW);
  digitalWrite(d, LOW);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, LOW);
}

void z4() {
  digitalWrite(a, HIGH);
  digitalWrite(b, LOW);
  digitalWrite(c, LOW);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
}

void z5() {
  digitalWrite(a, LOW);
  digitalWrite(b, HIGH);
  digitalWrite(c, LOW);
  digitalWrite(d, LOW);
  digitalWrite(e, HIGH);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
}

void z6() {
  digitalWrite(a, LOW);
  digitalWrite(b, HIGH);
  digitalWrite(c, LOW);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
}

void z7() {
  digitalWrite(a, LOW);
  digitalWrite(b, LOW);
  digitalWrite(c, LOW);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
}

void z8() {
  digitalWrite(a, LOW);
  digitalWrite(b, LOW);
  digitalWrite(c, LOW);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
}

void z9() {
  digitalWrite(a, LOW);
  digitalWrite(b, LOW);
  digitalWrite(c, LOW);
  digitalWrite(d, LOW);
  digitalWrite(e, HIGH);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
}

void z0() {
  digitalWrite(a, LOW);
  digitalWrite(b, LOW);
  digitalWrite(c, LOW);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, HIGH);
}

void zjdn() {
  digitalWrite(one, LOW);
  digitalWrite(ten, HIGH);
  digitalWrite(hund, HIGH);
  digitalWrite(thou, HIGH);
  digitalWrite(tetho, HIGH);
  digitalWrite(hutho, HIGH);
}

void zdst() {
  digitalWrite(one, HIGH);
  digitalWrite(ten, LOW);
  digitalWrite(hund, HIGH);
  digitalWrite(thou, HIGH);
  digitalWrite(tetho, HIGH);
  digitalWrite(hutho, HIGH);
}

void zsto() {
  digitalWrite(one, HIGH);
  digitalWrite(ten, HIGH);
  digitalWrite(hund, LOW);
  digitalWrite(thou, HIGH);
  digitalWrite(tetho, HIGH);
  digitalWrite(hutho, HIGH);
}

void ztis() {
  digitalWrite(one, HIGH);
  digitalWrite(ten, HIGH);
  digitalWrite(hund, HIGH);
  digitalWrite(thou, LOW);
  digitalWrite(tetho, HIGH);
  digitalWrite(hutho, HIGH);
}

void zdts() {
  digitalWrite(one, HIGH);
  digitalWrite(ten, HIGH);
  digitalWrite(hund, HIGH);
  digitalWrite(thou, HIGH);
  digitalWrite(tetho, LOW);
  digitalWrite(hutho, HIGH);
}

void zsts() {
  digitalWrite(one, HIGH);
  digitalWrite(ten, HIGH);
  digitalWrite(hund, HIGH);
  digitalWrite(thou, HIGH);
  digitalWrite(tetho, HIGH);
  digitalWrite(hutho, LOW);
}

void nezobraz() {
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
  digitalWrite(one, HIGH);
  digitalWrite(ten, HIGH);
  digitalWrite(hund, HIGH);
  digitalWrite(thou, HIGH);
  digitalWrite(tetho, HIGH);
  digitalWrite(hutho, HIGH);
}

void keepoff() {
  digitalWrite(one2, HIGH);
  digitalWrite(ten2, HIGH);
  digitalWrite(hun2, HIGH);
  delay(1);
  Serial.end();
}

void turnon() {pastms2 = millis();
  Serial.end();
  while(millis() - pastms2 < 100) {}
  digitalWrite(38, LOW); // reset the 'duino
}

void numplace(byte cisloztlacitka) {
  zadanecislo = zadanecislo * 10;
  zadanecislo = zadanecislo + cisloztlacitka;
}

void zadajplu() {
  cenapolozka = pgm_read_float(&plucena[cisloplu]);
  zadanecislo = 0;
}