lejos.hardware.sensor

Class UARTSensor

java.lang.Object

lejos.hardware.Device

lejos.hardware.sensor.BaseSensor

lejos.hardware.sensor.UARTSensor

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, SensorMode, SensorModes, SampleProvider

Direct Known Subclasses:

CodeTemplate, EV3ColorSensor, EV3GyroSensor, EV3IRSensor, EV3UltrasonicSensor

public class UARTSensor
extends BaseSensor

Base class for EV3 UART based sensors. UART sensor drivers should extend this class

Author:

andy

Field Summary

Fields

Modifier and Type	Field and Description
protected int	currentMode
protected UARTPort	port

Fields inherited from class lejos.hardware.sensor.BaseSensor

modes

Fields inherited from class lejos.hardware.Device

closeList

Constructor Summary

Constructors

Constructor and Description
UARTSensor(Port port) Standard constructor for a UARTSensor initialises things and places the device into mode 0.
UARTSensor(Port port, int mode) Create the sensor object and switch to the selected mode
UARTSensor(UARTPort port) Standard constructor for a UARTSensor initialises things and places the device into mode 0.
UARTSensor(UARTPort port, int mode) Create the sensor object and switch to the selected mode

Method Summary

Modifier and Type	Method and Description
protected void	switchMode(int newMode, long switchDelay) Switch to the selected mode (if not already in that mode) and delay for the specified period to allow the sensor to settle in the new mode.

Methods inherited from class lejos.hardware.sensor.BaseSensor

fetchSample, getAvailableModes, getCurrentMode, getMode, getMode, getModeCount, getName, sampleSize, setCurrentMode, setCurrentMode, setModes

Methods inherited from class lejos.hardware.Device

close, releaseOnClose

Methods inherited from class java.lang.Object

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

Field Detail

port

protected UARTPort port

currentMode

protected int currentMode

Constructor Detail

UARTSensor

public UARTSensor(UARTPort port)

Standard constructor for a UARTSensor initialises things and places the device into mode 0.

Parameters:

port - The port the sensor is attached to.

UARTSensor

public UARTSensor(Port port)

Standard constructor for a UARTSensor initialises things and places the device into mode 0.

Parameters:

port - The port the sensor is attached to.

UARTSensor

public UARTSensor(UARTPort port,
                  int mode)

Create the sensor object and switch to the selected mode

Parameters:

port - The port the sensor is attached to.

mode - Operating mode for the sensor.

UARTSensor

public UARTSensor(Port port,
                  int mode)

Create the sensor object and switch to the selected mode

Parameters:

port - The port the sensor is attached to.

mode - Operating mode for the sensor.

Method Detail

switchMode

protected void switchMode(int newMode,
                          long switchDelay)

Switch to the selected mode (if not already in that mode) and delay for the specified period to allow the sensor to settle in the new mode.
A mode of -1 resets the sensor. TODO: There really should be a better way to work out when the switch is complete, if you don't wait though you end up reading data from the previous mode.

Parameters:

newMode - The mode to switch to.

switchDelay - Time in mS to delay after the switch.