Button

The IQ (1st gen) Brain has access to three objects for its three buttons:

• buttonCheck

• buttonUp

• buttonDown

pressed()

The pressed(callback) method registers a function to be called when a button is pressed.

Parameters	Description
callback	A function that will be called when the button is pressed.

Returns: None.

// Create a new function buttonPressed().
void button_pressed() {
  Brain.Screen.print("button pressed");
}

int main() {
  // When the Brain's Up button is pressed, run the
  // button_pressed function.
  Brain.buttonUp.pressed(buttonPressed);
}

released()

The released(callback) method registers a function to be called when a button is released.

Parameters	Description
callback	A function that will be called when the button is released.

Returns: None.

// Create a new function buttonReleased().
void button_pressed() {
  Brain.Screen.print("button released");
}

int main() {
  // When the Brain's Up button is released, run the
  // button_pressed function.
  Brain.buttonUp.released(buttonReleased);
}

pressing()

The pressing() method returns whether a button is currently being pressed.

Returns: true if the button is being pressed. false if it is not.