int xValue = 0 ; // read value of the X axis  
int yValue = 0 ; // read value of the Y axis  
int sValue = 0 ; // value of the button reading 

void setup()  
{ 
  Serial.begin(9600) ;
  pinMode(17,INPUT) ; // Configure Switch as an input
  digitalWrite(17,HIGH); 
} 

void loop() 
{ 
  // Read analog port values from the pins 18 and 19  
  xValue = analogRead(18);  
  yValue = analogRead(19);  
  sValue = digitalRead(17); // Read the logic value on Switch

  // We display our data separated by a comma 
  Serial.print(xValue,DEC);
  Serial.print(",");
  Serial.print(yValue,DEC);
  Serial.print(",");
  Serial.print(!sValue);

  // We end with a newline character to facilitate subsequent analysis  
  Serial.print("\n");

  delay(100);  
}