#include <Keypad.h>

int load = 11;
int clockEnablePin = 12;
int dataIn = 9;//q7
int clockIn = 10;

// Define the number of columns and rows in the keypad
#define NUM_COLUMNS 4
#define NUM_ROWS 4

// Define the keypad keys
char keys[NUM_ROWS][NUM_COLUMNS] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};

// Define the keymap
char keymap[NUM_ROWS][NUM_COLUMNS] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};


// Create a Keypad object
Keypad keypad = Keypad(makeKeymap(keymap), rowPins, colPins, NUM_ROWS, NUM_COLUMNS);

// Create a ShiftIn object for the shift register
ShiftIn<4, MSBFIRST> shift(dataIn, clockIn, load);


void setup() {
  // put your setup code here, to run once:    
        pinMode(load, OUTPUT);
        pinMode(clockEnablePin, OUTPUT);
        pinMode(clockIn, OUTPUT);
        pinMode(dataIn, INPUT);
}


void loop() {
  // Read the state of the keypad using the shift register
  uint16_t data = shift.read();

  // Use the Keypad library to get the key pressed
  char key = keypad.getKey();

  if (key != NO_KEY) {
    Serial.println(key);
  }

  // Delay for stability
  delay(100);
}