#include <Wire.h> // I2C程式庫
#include <LiquidCrystal_I2C.h> // LCD_I2C模組程式庫

/** 
LCD I2C位址，默認為0x27或0x3F，依據背板的晶片，
不同而有差異，16、2為LCD顯示器大小。
**/

LiquidCrystal_I2C lcd(0x27, 20, 4); 

uint8_t heart[8]= 
{
  0b00000,
  0b01010,
  0b11111,
  0b11111,
  0b11111,
  0b01110,
  0b00100,
  0b00000,
};

uint8_t up[8]=
{
  0b00000000,
  0b00000000,
  0b00000100,
  0b00001110,
  0b00011111,
  0b00000100,
  0b00000100,
  0b00000000,
};

uint8_t right[8]=
{
  0b00000000,
  0b00000000,
  0b00000100,
  0b00001100,
  0b00011111,
  0b00001100,
  0b00000100,
  0b00000000,
};

uint8_t down[8]=
{
  0b00000000,
  0b00000000,
  0b00000100,
  0b00000100,
  0b00011111,
  0b00001110,
  0b00000100,
  0b00000000,
  
};

uint8_t left[8]=
{
  0b00000000,
  0b00000000,
  0b00000100,
  0b00000110,
  0b00111111,
  0b00000110,
  0b00000100,
  0b00000000,
};

int x, y;
int dir=1;
void setup() 
{
  // put your setup code here, to run once:
  // 初始化LCD
  lcd.init();
  lcd.backlight();
  lcd.createChar(1, heart);
  lcd.createChar(2, up);
  lcd.createChar(3, right);
  lcd.createChar(4, down);
  lcd.createChar(5, left);
}

void loop() 
{
  // put your main code here, to run repeatedly:
  y = analogRead(A0);
  x = analogRead(A1);

  if (y>700) // 搖桿往上
     dir=2;
  if (y<300) // 搖桿往下
    dir=4;
  if (x<300) // 搖桿往左
    dir=6;
  if (x>700) // 搖桿往右
    dir=8;
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("\x01");
  lcd.setCursor(0,1);
  lcd.print("\x02 \x03 \x04 \x05");
  lcd.setCursor(0,2);
  lcd.print("           ");
  lcd.setCursor(0,2);
  lcd.print("x :");
  lcd.print(x);
  lcd.print(" Y :");
  lcd.print(y);

  lcd.setCursor(0,3);
  if (dir==2)
    lcd.print("\x02");
  if (dir==4)
    lcd.print("\x04");
  if (dir==6)
    lcd.print("\x05");  
  if (dir==8)
    lcd.print("\x03");   

  delay(300);
}