#include <LiquidCrystal_I2C.h>

// instancies de les llibreries
LiquidCrystal_I2C lcd(0x27, 20, 4);
#define jPinX A1
#define jPinY A0
#define jPinB A2

uint16_t joyX, joyY;
bool joyB = false;
uint8_t lcdCol = 0;
#define MINCOL 0
#define MAXCOL 20

const uint8_t pacman[8] = {
  0b00000,
  0b00100,
  0b01110,
  0b11011,
  0b11111,
  0b01110,
  0b10001,
  0b00000
};

void setup() {
  // put your setup code here, to run once:
  //pinMode(jPinX, INPUT);
  //pinMode(jPinY, INPUT);
  pinMode(jPinB, INPUT_PULLUP);

  Serial.begin(9600);

  lcd.init();
  lcd.createChar(1, pacman);
  lcd.backlight();
  lcdCol = centraText("Thos i codina");
  Serial.print("Pos Col: "); Serial.println(lcdCol);
  lcd.setCursor(lcdCol,0);
  lcd.print("Thos i Codina");
  //lcd.setCursor(lcdCol,1);
  //lcd.print("\1");
  lcdCol = centraText("a");
  Serial.println("Setup Ok!");
}

void loop() {
  // put your main code here, to run repeatedly:
  joyX = analogRead(jPinX);
  joyY = analogRead(jPinY);
  joyB = digitalRead(jPinB);

  //Serial.print("jX: "); Serial.println(joyX);
  //Serial.print("jY: "); Serial.println(joyY);

  if(!joyB){ 
    lcd.print(" ");
    lcdCol = centraText("a");
  }
  if(joyX < 250){
    lcd.setCursor(lcdCol,2);
    lcd.print(" ");
    lcdCol++;
    if(lcdCol >= MAXCOL) lcdCol = 0;
  }
  else if(joyX > 750){
    lcd.setCursor(lcdCol,2);
    lcd.print(" ");
    if(lcdCol <= MINCOL) lcdCol = 19;
    else lcdCol--;    
  }
  else{}
  //Serial.print("Columna: "); Serial.println(lcdCol);

  lcd.setCursor(lcdCol,2);
  lcd.write(1);
  delay(100);

}

int centraText(char * txt){
 int valor;
  valor = (MAXCOL - strlen(txt))/2;
  if (valor > MAXCOL) return 0;
  else return valor;
}