// C++ code
//
#include <stdlib.h>
#include <Keypad.h>
#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
const unsigned char ROWS = 4; 
const unsigned char COLS = 4; 
#define MOTOR	10

struct SYSFLAGS{//este es un campo de bits, lo usamos para definir banderas
  unsigned int stateM  :4;
};
struct SYSFLAGS sysFlags;//asignamos un nombre para poder acceder a el
char timeNum[4] = {0};
char timeNum_Wr = 0;
char keys[ROWS][COLS] = {
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};

unsigned char rowPins[ROWS] = {9,8,7,6}; 
unsigned char colPins[COLS] = {5,4,3,2};

Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );
LiquidCrystal_I2C lcd(0x27,16,2); 

int timeOut = 0;
int timerOne = 0;
int timeCnt = 0;

String array = "0";
void setup()
{
  lcd.init();
  lcd.backlight();
  lcd.clear();
  pinMode(MOTOR,OUTPUT);
  sysFlags.stateM = 0;
}

void loop()
{
  static int cursor = 7;
  char key = keypad.getKey();
  
  
  switch(sysFlags.stateM){
  case 0:
    digitalWrite(MOTOR, LOW);
    lcd.setCursor(4,0);
    lcd.print("WELCOME");
    if(key){
      lcd.clear();
      sysFlags.stateM++;
      lcd.setCursor(cursor++,0);
      lcd.print(key);
      timeNum[timeNum_Wr++] = key;
      timerOne = millis();
    }
  break;
  case 1:
	  lcd.setCursor(0,0);
    lcd.print("TIME_S");
    if(key){
      timerOne = millis();
      if(cursor <= 9){
        lcd.setCursor(cursor++,0);
        lcd.print(key);
        timeNum[timeNum_Wr++] = key;
        timeCnt = atoi(timeNum);
        timerOne = millis();
      }
    }
    timeOut = (millis() - timerOne);
    if(timeOut > 2000){
      lcd.clear();
      timeNum_Wr = 0;
      cursor = 7;
      sysFlags.stateM++;
    }
  break;
  case 2:
    digitalWrite(MOTOR, HIGH);
    lcd.setCursor(0,0);
    lcd.print("TIME_T");
    lcd.setCursor(cursor,0);
    lcd.print(timeCnt);
    timeOut = (millis()-timerOne);
    if(timeOut > 1000){
      lcd.setCursor(cursor,0);
      lcd.print("   ");
      timerOne = millis();
      if(--timeCnt < 0){
        digitalWrite(MOTOR, LOW);
        sysFlags.stateM = 0;
        lcd.clear();
      }
    }
  break;
  default:

  break;
  }
}