#include <MD_Parola.h>
#include <SPI.h>

const int DATA_PIN = 23;
const int CS_PIN = 5;
const int CLK_PIN = 18;
#define MAX_DEVICES 1
#define HARDWARE_TYPE MD_MAX72XX::PAROLA_HW

const int G1_PIN = 32;
const int G2_PIN = 33;
const int G3_PIN = 25;
const int G4_PIN = 26;
const int G5_PIN = 27;
const int G6_PIN = 14;
const int GN_PIN = 12;
const int G8_PIN = 13;

MD_Parola mx = MD_Parola(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);

void setup() {
  pinMode(G1_PIN, INPUT);
  pinMode(G2_PIN, INPUT);
  pinMode(G3_PIN, INPUT);
  pinMode(G4_PIN, INPUT);
  pinMode(G5_PIN, INPUT);
  pinMode(G6_PIN, INPUT);
  pinMode(GN_PIN, INPUT);
  pinMode(G8_PIN, INPUT);

  mx.begin();
  mx.setIntensity(0);
  mx.displayClear();
}

void loop() {
  mx.setTextAlignment(PA_CENTER);
  if (digitalRead(G1_PIN) == HIGH && digitalRead(G2_PIN) == HIGH &&
    digitalRead(G3_PIN) == HIGH && digitalRead(G4_PIN) == HIGH &&
    digitalRead(G5_PIN) == HIGH && digitalRead(G6_PIN) == HIGH &&
    digitalRead(GN_PIN) == HIGH){
    mx.displayClear();
  }
  if (digitalRead(G1_PIN) == LOW) {
    mx.print("1");
  } else if (digitalRead(G2_PIN) == LOW) {
    mx.print("2");
  } else if (digitalRead(G3_PIN) == LOW) {
    mx.print("3");
  } else if (digitalRead(G4_PIN) == LOW) {
    mx.print("4");
  } else if (digitalRead(G5_PIN) == LOW) {
    mx.print("5");
  } else if (digitalRead(G6_PIN) == LOW) {
    mx.print("6");
  } else if (digitalRead(GN_PIN) == LOW) {
    mx.print("N");
  }
}