// Front Torpedo-Launcher LED 74HC 595 Q0
// Front Torpedo-Launcher BTN 74HC 165 D0
// Rear Torpedo-Launcher LED 74HC 595 Q1
// Rear Torpedo-Launcher BTN 74HC 165 D1

// 74HC 595 DS = 13     (Data)
// 74HC 595 STCP = 12   (Latch)
// 74HC 595 SHCP = 8    (Clock)

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

const int _srOutData = 13;
const int _srOutClock = 8;
const int _srOutLatch = 12;
const int _srInData = 5;
const int _srInClock = 2;
const int _srInLatch = 4; // "load" in example
const int _srInClockEn = 3;
const int _srOutNumBits = 8;
const int _srInNumBits = 8;

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

bool _FrontTorpedoLauncherBTNLastState = 1;
bool _FrontTorpedoLauncherBTNCurrentState = 1;
bool _RearTorpedoLauncherBTNLastState = 1;
bool _RearTorpedoLauncherBTNCurrentState = 1;

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

}