Button

Depending on if it is an IQ (2nd gen) Controller of an IQ (1st gen) Controller, the button attribute has access to different objects:

IQ (2nd gen) Controller	IQ (1st gen) Controller
ButtonEUp - The Upper E button. ButtonEDown - The Lower E button. ButtonFUp - The Upper F button. ButtonFDown -The Lower F button. ButtonLUp - The Upper L Button. ButtonLDown - The Lower L Button. ButtonL3 - The L3 Button using the Left Joystick. ButtonRUp - The Upper R Button. ButtonRDown - The Lower R Button. ButtonR3 - The R3 Button using the Right Joystick.	ButtonEUp - The Upper E button. ButtonEDown - The Lower E button. ButtonFUp - The Upper F button. ButtonFDown -The Lower F button. ButtonLUp - The Upper L Button. ButtonLDown - The Lower L Button. ButtonRUp - The Upper R Button. ButtonRDown - The Lower R Button.

pressed()

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

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

Returns: None.

// Define the buttonPressed function with a void return
// type, showing it doesn't return a value.
void buttonPressed() {
  // The Brain will print that a controller button was
  // pressed on the Brain's screen.
  Brain.Screen.print("controller button pressed");
}

int main() {
  // Initializing Robot Configuration. DO NOT REMOVE!
  vexcodeInit();

  // Run buttonPressed when the Left Up button is pressed 
  // on the controller.
  Controller.ButtonLUp.pressed(buttonPressed);
}

released()

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

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

Returns: None.

// Define the buttonReleased function with a void return
// type, showing it doesn't return a value.
void buttonReleased() {
  // The Brain will print that a controller button was
  // released on the Brain's screen.
  Brain.Screen.print("controller button released");
}

int main() {
  // Initializing Robot Configuration. DO NOT REMOVE!
  vexcodeInit();

  // Run buttonReleased when the Left Up button is released 
  // on the controller.
  Controller.ButtonLUp.released(buttonReleased);
}

pressing()

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

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