// Testcode voor LED's via 74HC595
const int LATCH_PIN = 46; 
const int CLOCK_PIN = 47; 
const int DATA_PIN = 45;  

const int LOAD_PIN = 53;  
const int CP_PIN = 52;    
const int Q7_PIN = 50;    

void setup() {
  pinMode(LATCH_PIN, OUTPUT);
  pinMode(CLOCK_PIN, OUTPUT);
  pinMode(DATA_PIN, OUTPUT);
  pinMode(LOAD_PIN, OUTPUT);
  pinMode(CP_PIN, OUTPUT);
  pinMode(Q7_PIN, INPUT);
}

void loop() {
  // Lees de knoppen uit
  digitalWrite(LOAD_PIN, LOW);
  delayMicroseconds(5);
  digitalWrite(LOAD_PIN, HIGH);
  
  byte buttonData = 0;
  for (int i = 0; i < 8; i++) {
    bitWrite(buttonData, i, !digitalRead(Q7_PIN)); 
    digitalWrite(CP_PIN, HIGH);
    digitalWrite(CP_PIN, LOW);
  }

  // Stuur de ingelezen data direct door naar de LED's
  // Hierdoor zie je direct welke knop de Arduino "ziet"
  digitalWrite(LATCH_PIN, LOW);
  shiftOut(DATA_PIN, CLOCK_PIN, MSBFIRST, buttonData); // LED register
  shiftOut(DATA_PIN, CLOCK_PIN, MSBFIRST, 0);          // Relais uit
  digitalWrite(LATCH_PIN, HIGH);
}