pot

Initializing the pot Class

A Potentiometer is created by using the following constructor:

The pot constructor creates a pot object in the specified Three Wire Port:

Parameter	Description
port	The 3-Wire Port that the Potentiometer is connected to, whether it’s a port on the Brain, or a 3-Wire Expander.

A Brain or 3-Wire Expander must be created first before they can be used to create an object with the pot Class constructor.

// Create the Brain.
brain Brain;
// Construct a Potentiometer "potentiometer" with the
// pot class.
pot potentiometer = pot(Brain.ThreeWirePort.A);

This potentiometer object will be used in all subsequent examples throughout this API documentation when referring to pot class methods.

Class Methods

angle()

The angle(units) method returns the angle measured by the Potentiometer.

Parameters	Description
units	A valid RotationUnit or percent. The default is degrees.

Returns: A double representing the angle measured by the Potentiometer in the specified units.

// Get the current angle of the Potentiometer in the
// range 0 - 250 degrees.
double angle = potentiometer.angle(degrees);

// Print the current angle of the Potentiometer to the
// brain screen.
Brain.Screen.print(angle);

changed()

The changed(callback) method registers a callback function for when the value measured by the Potentiometer changes.

Parameters	Description
callback	The callback function to be called when the value measured by the Potentiometer changes.

Returns: None.

// Define the PotentiometerChanged function with a void
// return type, showing it doesn't return a value.
void potentiometerChanged() {
  // The brain will print that the value of the Potentiometer
  // changed on the Brain's screen.
  Brain.Screen.print("Potentiometer changed");
}

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

  // Run PotentiometerChanged when the value measured by
  // the Potentiometer changes.
  potentiometer.changed(potentiometerChanged);
}