/*
      connect description
      JoyStick Shield               Arduino UNO
      Buttuon A                       D2
      Buttuon B                       D3
      Buttuon C                       D4
      Buttuon D                       D5
      Buttuon E                       D6
      Buttuon F                       D7
      Buttuon K                       D8
      X                               A0
      Y                               A1
*/

int FirstShotX , FirstShotY;
const unsigned int BAUD_RATE = 9600;//ÉèÖò¨ÌØÂÊ
void setup()
{
  for(int i=0; i<19; i++)
  {
    pinMode(i, INPUT);
    digitalWrite(i, 1);
  }
  Serial.begin(BAUD_RATE);
  FirstShotX = 0;
  FirstShotY = 0;
}

void loop(){
  int i, someInt, flag = 0;
  for(i=2; i<9; i++)
  {
    someInt = digitalRead(i);
    if(someInt == 0)
    {
        flag =1;
        break;
    }
  }
  if(flag == 1)
  {
    switch(i)
  {
    case 2: Serial.println("--------> Button A"); break;
    case 3: Serial.println("--------> Button B"); break;
    case 4: Serial.println("--------> Button C"); break;
    case 5: Serial.println("--------> Button D"); break;
    case 6: Serial.println("--------> Button E"); break;
    case 7: Serial.println("--------> Button F"); break;
    case 8: Serial.println("--------> Button KEY"); break;
    default: break;
  }
  flag=0;
}
  int sensorValue = analogRead(A0);
  if(FirstShotX == 0)
  {
    FirstShotX = sensorValue;
    Serial.print("FirstShotX = ");
    Serial.println(FirstShotX);
  }
  Serial.print("X = ");
  Serial.println(sensorValue - FirstShotX);
  sensorValue = analogRead(A1);
  if(FirstShotY == 0)
   {
      FirstShotY = sensorValue;
      Serial.print("FirstShotY = ");
      Serial.println(FirstShotY);
    }
  Serial.print("Y = ");
  Serial.println(sensorValue - FirstShotY);
  delay(200);
}