Package lejos.robotics.filter

Class SampleThread

java.lang.Object

lejos.robotics.filter.AbstractFilter

lejos.robotics.filter.SampleThread

All Implemented Interfaces:

SampleProvider

public class SampleThread
extends AbstractFilter

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private class	SampleThread.Runner Separate thread to continuously update the buffer with most recent sensors data at fixed interval.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) float[]	buffer
(package private) int	interval
(package private) boolean	newSampleAvailable
(package private) boolean	running
private float	sampleRate

Fields inherited from class lejos.robotics.filter.AbstractFilter

sampleSize, source

Constructor Summary

Constructors

Constructor and Description
SampleThread(SampleProvider source, float sampleRate) Create an instance and run at sampleRate.

Method Summary

Modifier and Type	Method and Description
void	fetchSample(float[] dst, int off) Fetches a sample from a sensors or filter.
float	getSampleRate()
boolean	isNewSampleAvailable()
void	setSampleRate(float rate)
void	start() Start the sampling (Default at instantiation)
void	stop() Stop the sampling

Methods inherited from class lejos.robotics.filter.AbstractFilter

sampleSize

Methods inherited from class java.lang.Object

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

Field Detail

buffer

float[] buffer

running

boolean running

sampleRate

private float sampleRate

interval

int interval

newSampleAvailable

boolean newSampleAvailable

Constructor Detail

SampleThread

public SampleThread(SampleProvider source,
                    float sampleRate)

Create an instance and run at sampleRate.

Parameters:

source - A SampleProvider

sampleRate - The sample rate expressed in Hertz (Samples / second)

Method Detail

isNewSampleAvailable

public boolean isNewSampleAvailable()

fetchSample

public void fetchSample(float[] dst,
                        int off)

Description copied from interface: SampleProvider

Fetches a sample from a sensors or filter.

Specified by:

fetchSample in interface SampleProvider

Overrides:

fetchSample in class AbstractFilter

Parameters:

dst - The array to store the sample in.

off - The elements of the sample are stored in the array starting at the offset position.

getSampleRate

public float getSampleRate()

Returns:

rate in Hz

setSampleRate

public void setSampleRate(float rate)

Parameters:

rate - in Hz

start

public void start()

Start the sampling (Default at instantiation)

stop

public void stop()

Stop the sampling