resetRotation

Reset rotation count to zero

Add-On Required: This feature requires the MATLAB Support Package for LEGO MINDSTORMS EV3 Hardware add-on.

Syntax

resetRotation(mymotor)

Description

resetRotation(mymotor) resets the rotation measurement to zero. You can use this function to reset the value that the readRotation function returns to zero.

Examples

Measure the Wheel Rotation of a Motor

Control a motor, measure the wheel rotation of the motor in degrees, and clear the measurement.

Create a connection to the EV3 brick called myev3.

myev3 = legoev3

myev3 = 

  legoev3 with properties:

      FirmwareVersion: 'V1.03E'
           HardwareID: []
            IPAddress: []
    CommunicationType: 'USB'
         BatteryLevel: 100
     ConnectedSensors: {'touch'  'gyro'  'color'  'sonic'}

The sensor appears in the list of connected sensors.

Create a connection to a motor. Specify the letter of the EV3 output port that connects to the motor.

mymotor = motor(myev3,'A')

mymotor = 

  motor with properties:

    OutputPort: 'A'
         Speed: 0

By default, the speed is zero.

Configure the motor to reverse at half speed.

mymotor.Speed = -50

mymotor = 

  motor with properties:

    OutputPort: 'A'
         Speed: -50

Start the motor.

start(mymotor)

Read the rotation value, in degrees, of the motor.

rotation = readRotation(mymotor)

ans =

       -1489

Reset the rotation value of the motor to zero.

resetRotation(mymotor)

Input Arguments

mymotor — Connection to motor

object handle

Connection to a motor, specified as a string that represents the object created using motor.

Example: mymotor

Data Types: char