//74hc595 uscite
int clockPin = 8;
int latchPin = 9;
int dataPin = 10;

// 74hc165  ingressi
#define REG_SL 2
#define REG_CK 3
#define REG_DI 5

byte n=0;
byte x=0;

void setup() {
  pinMode(latchPin, OUTPUT);
  pinMode(clockPin, OUTPUT);
  pinMode(dataPin, OUTPUT);
  
  pinMode(REG_SL, OUTPUT);
  pinMode(REG_CK, OUTPUT);
  pinMode(REG_DI, INPUT);
  Serial.begin(9600);
}

void loop() {
  //acquisizione porte d'ingresso
  digitalWrite(REG_SL, HIGH);
  delay(1);
  digitalWrite(REG_SL, LOW);
  delay(1);
  digitalWrite(REG_SL, HIGH);
  for (int i = 0; i < 8 ; i++) {
    bitWrite(n, i, digitalRead(REG_DI));
    digitalWrite(REG_CK, LOW);
    delay(1);
    digitalWrite(REG_CK, HIGH);
    delay(1);
  }
    for (int i = 0; i < 8 ; i++) {
    bitWrite(x, i, digitalRead(REG_DI));
    digitalWrite(REG_CK, LOW);
    delay(1);
    digitalWrite(REG_CK, HIGH);
    delay(1);
  }

  Serial.print(n, BIN);
  Serial.println(x, BIN);

  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, LSBFIRST, x);
  shiftOut(dataPin, clockPin, LSBFIRST, n);
  digitalWrite(latchPin, HIGH);
  delay(1);
}