#include "Arduino.h"
#include "Keypad.h"

const byte ROWS = 4; //four rows
const byte COLS = 3; //three columns
char keys[ROWS][COLS] =
{
    {'1', '2', '3'},
    {'4', '5', '6'},
    {'7', '8', '9'},
    {'*', '0', '#'}
};
byte rowPins[ROWS] = {8, 7, 6, 5}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {4, 3, 2}; //connect to the column pinouts of the keypad

Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

//Pin connected to latch pin (ST_CP) of 74HC595
const int latchPin = 9;
//Pin connected to clock pin (SH_CP) of 74HC595
const int clockPin = 10;
////Pin connected to Data in (DS) of 74HC595
const int dataPin = 11;

const byte CHAR_COUNT = 10;

const byte symbols[CHAR_COUNT] =
{
    B01111110, // 0
    B00010010, // 1
    B10111100, // 2
    B10110110, // 3
    B11010010, // 4
    B11100110, // 5
    B11101110, // 6
    B00110010, // 7
    B11111110, // 8
    B11110110  // 9
};


void setup()
{
    //set pins to output because they are addressed in the main loop
    pinMode(latchPin, OUTPUT);
    pinMode(dataPin, OUTPUT);
    pinMode(clockPin, OUTPUT);
    Serial.begin(9600);
}

void loop()
{
    char key = keypad.getKey();

    if (key != NO_KEY)
    {
        Serial.println(key);
        Serial.println(symbols[key-48]);
        writeLeds(symbols[key - 48]);
    }

}


void writeLeds(byte pattern)
{
    // turn off the output so the pins don't light up
    // while you're shifting bits:
    digitalWrite(latchPin, LOW);

    // shift the bits out:
    shiftOut(dataPin, clockPin, MSBFIRST, pattern);

    // turn on the output so the LEDs can light up:
    digitalWrite(latchPin, HIGH);
}