org.openuat.sensors.j2me
Class SymbianTCPAccelerometerReader

java.lang.Object
  org.openuat.sensors.SamplesSource
      org.openuat.sensors.j2me.SymbianTCPAccelerometerReader

public class SymbianTCPAccelerometerReader
extends SamplesSource

This class implements an accelerometer sensor reader that gets its data from a small Symbian/C++ wrapper around the Nokia sensor SDK. It opens a TCP socket to which the Symbian program will connect. In the future, this should be the other way around with the Symbian wrapper being a service.

Version:

1.1, changes to 1.0: Not using the Symbian wrapper any more but now the Python wrapper implementation.

Author:

Rene Mayrhofer

Field Summary

static int	SAMPLERATE This is only approximate, we can't control the sample rate on the device.
static int	VALUE_RANGE

Fields inherited from class org.openuat.sensors.SamplesSource

maxNumLines

Constructor Summary

SymbianTCPAccelerometerReader()
Initializes the reader.

Method Summary

TimeSeries_Int.Parameters	getParameters_Int() Instead of to [-1;1], these integer parameters map to [-1024;1024], i.e.
TimeSeries.Parameters	getParameters() Provides appropriate parameters for interpreting the values to normalize to the [-1;1] range.
protected boolean	handleSample() Implementation of SamplesSource.handleSample.
void	start() This overrides the SamplesSource.start implementation, because we need to open the outgoing control connection to get the incoming data connection.
void	stop() This overrides the SamplesSource.stop implementation to also properly close all resources the may be in use (the sockets).

Methods inherited from class org.openuat.sensors.SamplesSource

addSink, addSink, addSink, dispose, emitSample, emitSample, getMaxNumLines, removeSink_Int, removeSink, removeSink, simulateSampling

Methods inherited from class java.lang.Object

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

Field Detail

SAMPLERATE

public static final int SAMPLERATE

This is only approximate, we can't control the sample rate on the device.

See Also:

Constant Field Values

VALUE_RANGE

public static final int VALUE_RANGE

See Also:

Constant Field Values

Constructor Detail

SymbianTCPAccelerometerReader

public SymbianTCPAccelerometerReader()

Initializes the reader.

Method Detail

start

public void start()

This overrides the SamplesSource.start implementation, because we need to open the outgoing control connection to get the incoming data connection.

Overrides:

start in class SamplesSource

stop

public void stop()

This overrides the SamplesSource.stop implementation to also properly close all resources the may be in use (the sockets).

Overrides:

stop in class SamplesSource

handleSample

protected boolean handleSample()

Implementation of SamplesSource.handleSample. When the connection has not yet been established by the Symbian Sensor API wrapper, then this method will block until an incoming connection has been established. Then, and on all further calls, it will read the samples from sensorDataIn and call emitSample to send to listeners.

Specified by:

handleSample in class SamplesSource

Returns:

true if more samples are available, false otherwise.

getParameters

public TimeSeries.Parameters getParameters()

Provides appropriate parameters for interpreting the values to normalize to the [-1;1] range.

Specified by:

getParameters in class SamplesSource

getParameters_Int

public TimeSeries_Int.Parameters getParameters_Int()

Instead of to [-1;1], these integer parameters map to [-1024;1024], i.e. MAXIMUM_RANGE in TimeSeries_Int.

Specified by:

getParameters_Int in class SamplesSource