PressAButton.ino

//
// PressAButton
//
// Pressing the button causes the LED to light up.
// 
// We are using ports S0 and S1 on the Duinobot board
//    * The LED device will be plugged into S0,
//    * The Button sensor will be plugged into S1.
//
//  NOTES: 
//      - Ports S0-S5 are analog input pins
//      - S0 is identical to Arduino A0 and so on (S5=A5)
//      - To use these ports as Digital pins add 14
//

#define S0 0+14
#define S1 1+14

int buttonState;   // to store the button state
                   // 1 - means the button is not pressed
                   // 0 - means the button is pressed

// run once, when the sketch starts
void setup() {
  pinMode(S0, OUTPUT);          // sets the port S0 as a digital
                                // output for the LED device
  pinMode(S1, INPUT);           // Sets the port S1 as a digital
                                // input for the button sensor

  // Setup serial communication ... commented out for now
  //Serial.begin(9600);
}

// run over and over again
void loop() {
  // get the button state
  buttonState = digitalRead(S1);
  
  // Print the state of the button to the Serial Monitor
  //Serial.print("The state of button is: ");
  //Serial.println(buttonState);

  // if the button is pressed light the led
  if (buttonState == 1) 
  {
    digitalWrite (S0, LOW);
  }
  else
  {
    digitalWrite (S0, HIGH);
  }
}