// 74HC 165 Q7 = 5      (Data)
// 74HC 165 PL = 4      (Latch)
// 74HC 165 CP = 2      (Clock)
// 74HC 165 CE = 3      (Clock Enable)

const int _srInData = 5;
const int _srInClock = 2;
const int _srInLatch = 4; 
const int _srInClockEn = 3;

const int _srOutNumBits = 8;
const int _srInNumBits = 8;

int _WriteData[_srOutNumBits];
int _ReadData[_srInNumBits];

void setup() {
  pinMode(_srInData, INPUT);
  pinMode(_srInClock, OUTPUT);
  pinMode(_srInClockEn, OUTPUT);
  pinMode(_srInLatch, OUTPUT);

  Serial.begin(9600);
  Serial.println(F("Start..."));

}

void loop() {
  digitalWrite(_srInLatch, LOW);
  digitalWrite(_srInLatch, HIGH);
   
  byte _dataIn;
  
  digitalWrite(_srInClock, HIGH);
  digitalWrite(_srInClockEn, LOW);

  _dataIn = shiftIn(_srInData, _srInClock, MSBFIRST);
  digitalWrite(_srInClockEn, HIGH);

  Serial.print("Data of _dataIn: ");
  Serial.println(_dataIn, BIN);

  delay(200);

  // digitalWrite(_srOutLatch, LOW);
  // shiftOut(_srOutData, _srOutClock, MSBFIRST, ~_dataIn);
  // digitalWrite(_srOutLatch, LOW);

  // Serial.print("Data of _dataIn: ");
  // Serial.println(~_dataIn, BIN);

}