ArduinoLaserskaKomunikacijaTx

int vreme = 1;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(38400);
  pinMode(2, OUTPUT);
  cli(); // disable interrupt
  TCCR0A = 0;
  TCCR0B = 0;
  TCNT0 = 1; // initialize the counter from 0
  OCR0A = 124; // = (16*10^6) / (2000*64) - 1 (must be <256)
  TCCR0A |= (1 << WGM01); // turn on CTC mode
  TCCR0B |= (1 << CS01);// | (1 << CS00); // Set CS01 and CS00 bits for 64 prescaler
  TIMSK0 |= (1 << OCIE0A); // enable timer compare interrupt
  sei(); //allows interrupts
}

ISR(TIMER0_COMPA_vect) {
  vreme=0;
}

//#define DELAY 1
char zn;
int b = 0;
short niz[8];

void loop() {

  b = 0;
  if (Serial.available() > 0) {

    zn = Serial.read();
    if (zn != '\n') {

      for (int i = 7; i >= 0; i--)
      {
        if ((zn >> i) & 1)
          niz[b] = 1;
        else
          niz[b] = 0;
        b++;
      }


      digitalWrite(2, HIGH);
      vreme=1;
      while (vreme);

      for (int i = 0; i < b; i++) {
        //Serial.print(niz[i]);

        if (niz[i] == 1)
          digitalWrite(2, HIGH);

        else
          digitalWrite(2, LOW);

        vreme = 1;
        while (vreme);
      }

      digitalWrite(2, LOW);
      vreme = 1;
      while (vreme);
    }

    //Serial.println();
  }
}