ch.aplu.ev3

Class NxtLightSensor

java.lang.Object

ch.aplu.ev3.Part

ch.aplu.ev3.Sensor

ch.aplu.ev3.NxtLightSensor

public class NxtLightSensor
extends Sensor

Class that represents a light sensor (Lego NXT light sensor).

Constructor Summary

Constructors

Constructor and Description
NxtLightSensor() Creates a sensor instance connected to port S1.
NxtLightSensor(SensorPort port) Creates a sensor instance connected to the given port.

Method Summary

Methods

Modifier and Type	Method and Description
void	activate(boolean enable) Turns on/off the LED used for reflecting light back into the sensor.
void	addLightListener(LightListener lightListener) Registers the given light listener with default trigger level 500.
void	addLightListener(LightListener lightListener, int triggerLevel) Registers the given light listener for the given trigger level.
lejos.hardware.sensor.NXTLightSensor	getLejosSensor() Returns the reference of the the underlying lejos.hardware.sensor.NxtLightSensor.
int	getValue() Polls the sensor.
int	setTriggerLevel(int triggerLevel) Sets a new trigger level and returns the previous one.

Methods inherited from class ch.aplu.ev3.Sensor

getLejosPort

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

NxtLightSensor

public NxtLightSensor(SensorPort port)

Creates a sensor instance connected to the given port.

Parameters:

port - the port where the sensor is plugged-in

NxtLightSensor

public NxtLightSensor()

Creates a sensor instance connected to port S1.

Method Detail

addLightListener

public void addLightListener(LightListener lightListener,
                    int triggerLevel)

Registers the given light listener for the given trigger level.

Parameters:

lightListener - the LightListener to become registered.

triggerLevel - the trigger level where the callback is triggered

addLightListener

public void addLightListener(LightListener lightListener)

Registers the given light listener with default trigger level 500.

Parameters:

lightListener - the LightListener to become registered.

setTriggerLevel

public int setTriggerLevel(int triggerLevel)

Sets a new trigger level and returns the previous one.

Parameters:

triggerLevel - the new trigger level

Returns:

the previous trigger level

activate

public void activate(boolean enable)

Turns on/off the LED used for reflecting light back into the sensor. Due to a bug in leJOS version 0.8-beta, the floodlight is activated when the sensor is read.

Parameters:

enable - if true, turn the LED on, otherwise turn it off

getValue

public int getValue()

Polls the sensor. Due to a bug in leJOS version 0.8-beta, the floodlight is activated when the sensor is read.

Returns:

the current value the sensor reported: 0 (dark) .. 1023 (bright)

getLejosSensor

public lejos.hardware.sensor.NXTLightSensor getLejosSensor()

Returns the reference of the the underlying lejos.hardware.sensor.NxtLightSensor.

Returns:

the reference of the lejos.hardware.sensor.NxtLightSensor