#include <Arduino.h>;



int STCP =8; // Letch pin
int SHCP =12 ;  // clock pin
int DS =11; // Data pin

int  smer  ; // dugme start
int  zoom ; // dugme uvećaj
boolean ButtonZoom =false;
boolean LastButtonZoom = false;
int time =200; // verme 

byte leds =0 ;
int cnt;




void setup() {
  // put your setup code here, to run once:
// def za 74hc595
pinMode(8, OUTPUT);
pinMode(11, OUTPUT);
pinMode(12, OUTPUT);
// analogni ulaz
Serial.begin(115200);
pinMode(A0, INPUT);
// digitalni ulazi tasteri 
pinMode(2, INPUT);
pinMode(3, INPUT);
pinMode(4, OUTPUT);

/*digitalWrite(STCP, LOW);
shiftOut(DS, SHCP, MSBFIRST, leds);
digitalWrite(STCP, HIGH);*/
time = map(time,0,1023,200,2000); // mapira očitan A0 na 0 do 2000 ms koliko se traži u zadatku
}


void updateShiftRegister( boolean smr)
{
   digitalWrite(STCP, LOW);
   shiftOut(DS, SHCP, smr, leds);
   digitalWrite(STCP, HIGH);
}




/* Test Procedura
void Test (){
int parametar =0b11111111;
time = analogRead(A0);
time = map(time,0,1023,0,2000); // mapira očitan A0 na 0 do 2000 ms koliko se traži u zadatku

smer =digitalRead(2);
zoom =digitalRead(3);

if (smer == HIGH || time==0 )   {
   digitalWrite(STCP, LOW);
   shiftOut(DS, SHCP, MSBFIRST, parametar);
   digitalWrite(STCP, HIGH);
}
else if (zoom ==HIGH  || time == 2000) {
   digitalWrite(STCP, LOW);
   shiftOut(DS, SHCP, MSBFIRST, ~parametar);
   digitalWrite(STCP, HIGH);
}
}*/
void loop() {
smer =digitalRead(2);
zoom = digitalRead(3);
time = analogRead(A0);
cnt=0;

ButtonZoom =digitalRead(3);

if (ButtonZoom != LastButtonZoom) {
      if (ButtonZoom == LOW) {
        cnt ++;
      }
      delay(50);
    }
    LastButtonZoom = ButtonZoom;

  if (cnt > 8) {    
    cnt = 1;
  }

  if (cnt < 1) {      
    cnt = 8;
  }

if (smer ==  HIGH ){
  digitalWrite(4, HIGH);
// Puni niz sa levo na desno , prazni sa desno u levo
  for (int i = 0; i < 8; i++)	// Turn all the LEDs ON one by one.
  {
    bitSet(leds, i);		// u varijabli leds postavlja bit po bit
    updateShiftRegister(MSBFIRST);
    delay(time); // 
  }
  delay(2000);
   for (int i = 0; i<8; i++)	// Gasi diode jednu po jednu
  {
    bitClear(leds,i);		// u varijabli leds postavlja bit po bit
    updateShiftRegister(LSBFIRST);
    delay(time); // 
  }
    
}
else if (smer == LOW)  {
  digitalWrite(4, LOW);

  // Puni niz sa desno u levo , prazni niz sa levo u desno
  for (int i = 0; i < cnt; i++)	
  {
    bitSet(leds, i);	
    updateShiftRegister(LSBFIRST);
    delay(time); // 
  }
  delay(2000);
   for (int i = 0; i <cnt; i++)	
  {
    bitClear(leds,i);	
    updateShiftRegister(MSBFIRST);
    delay(time); // 
  }
}


  
   //Test(); 
  
}