ccd

Class AsynchronousCcdDriver

java.lang.Object

util.PropertyContainer

io.AbstractDriver

ccd.AbstractCcdDriver

ccd.AsynchronousCcdDriver

All Implemented Interfaces:

CcdDriver, Driver, Cloneable, Asynchronous, Initializable, PropertySupplying

Direct Known Subclasses:

JanosDriver

public abstract class AsynchronousCcdDriver
extends AbstractCcdDriver
implements Asynchronous

A non-blocking ccd-driver acts on the #startExpose and #startDarkExpose. The expose(), exposeBias(), and exposeDark() methods are wrapped around these methods.

See Also:

SynchronousCcdDriver

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	AsynchronousCcdDriver.ExposureThread An exposure thread start an exposure in its run method by calling the appropriate driver method.
static class	AsynchronousCcdDriver.Readout The different stati of the driver.

Nested classes/interfaces inherited from class ccd.AbstractCcdDriver

AbstractCcdDriver.Endurance, AbstractCcdDriver.Exposure, AbstractCcdDriver.Shot

Field Summary

Fields

Modifier and Type	Field and Description
private ExitThread	busy Indicates that a thread is running.
static String	KEY_MAXTRANSFER The maximum CCD to board memory transfer time.
static String	KEY_QUERYCYCLE The exposure time to mimic bias exposures.

Fields inherited from class ccd.AbstractCcdDriver

KEY_AMPLIFIERS, KEY_AREAREADOUT, KEY_COLUMNPOST, KEY_COLUMNPRIOR, KEY_COLUMNREADOUT, KEY_FIXEDREADOUT, KEY_INITSIZE, KEY_MAXTIME, KEY_MINTIME, KEY_ROWPOST, KEY_ROWPRIOR, KEY_ROWREADOUT, KEY_XBINNING, KEY_XCHIPSIZE, KEY_XDETECTORSIZE, KEY_XORIGIN, KEY_XSIZE, KEY_YBINNING, KEY_YCHIPSIZE, KEY_YDETECTORSIZE, KEY_YORIGIN, KEY_YSIZE

Fields inherited from class io.AbstractDriver

KEY_DRIVERNAME

Fields inherited from class util.PropertyContainer

KEY_LISTSEPARATOR, KEY_MAPKEYVALUECHAR, KEY_MAPSEPARATOR

Fields inherited from interface ccd.CcdDriver

FITSEXTENSION

Fields inherited from interface util.PropertySupplying

CONFIG, KEY_CLASS

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AsynchronousCcdDriver(Map<String,String> info) Constructor.

Method Summary

Modifier and Type	Method and Description
protected abstract boolean	abort() Interrupts an ongoing exposure.
boolean	ensureReady() If the current read-out status of the CCD is not IDLE, we query until it is.
int	expose() Make an exposure.
int	exposeBias() Makes a bias exposure.
int	exposeDark() Makes a dark exposure.
protected abstract AsynchronousCcdDriver.Readout	getReadoutStatus() Returns the readout-status of the ccd.
boolean	interruptProcess() Aborts the ongoing exposure.
boolean	interruptProcess(Method any) Aborts the ongoing exposure.
boolean	isExposing() We query the CCD if it is exposing.
protected abstract boolean	startBias() Starts a bias exposure.
protected abstract boolean	startDark() Starts a dark exposure, i.e.
protected abstract boolean	startScience() Starts a science exposure, i.e.
ExitThread	threadedBiasExpose() Returns a thread that exposes the ccd for a science exposure when started.
ExitThread	threadedDarkExpose() Returns a thread that exposes the ccd for a science exposure when started.
ExitThread	threadedExpose() Returns a thread that exposes the ccd for a science exposure when started.

Methods inherited from class ccd.AbstractCcdDriver

getDetectorSize, getMaximumExposureTime, getMinimumExposureTime, getReadoutMaximum, getReadoutTime, init, open, openController

Methods inherited from class io.AbstractDriver

createDriver, equals, getDriverName, hashCode

Methods inherited from class util.PropertyContainer

augment, augment, augment, augment, augment, clone, defaultBoolean, defaultChar, defaultDouble, defaultFloat, defaultInt, defaultLong, defaultObject, defaultObject, defaultProperties, defaultProperty, getAsBoolean, getAsChar, getAsDouble, getAsEnums, getAsFloat, getAsInt, getAsList, getAsLong, getAsMap, getAsMap, getAsObject, getAsObject, getProperties, getProperty, has, initProperties, isNew, parseObject, parseObject, reload, reload, removeProperty, requires, rescanned, setObject, setProperties, setProperty, stringProperties, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface ccd.CcdDriver

getBinning, getCcdInfo, getData, getExposureTime, getWindow, isReadingOut, setBinning, setExposureTime, setWindow

Methods inherited from interface io.Driver

close, getDriverName, isOpen

Field Detail

KEY_QUERYCYCLE

public static final String KEY_QUERYCYCLE

The exposure time to mimic bias exposures.

See Also:

Constant Field Values

KEY_MAXTRANSFER

public static final String KEY_MAXTRANSFER

The maximum CCD to board memory transfer time.

See Also:

Constant Field Values

busy

private ExitThread busy

Indicates that a thread is running.

Constructor Detail

AsynchronousCcdDriver

protected AsynchronousCcdDriver(Map<String,String> info)

Constructor. Does not open the connection, this is done in AbstractCcdDriver.open().

Method Detail

interruptProcess

public boolean interruptProcess()
                         throws InterruptedException

Aborts the ongoing exposure.

Specified by:

interruptProcess in interface Asynchronous

Throws:

InterruptedException

interruptProcess

public boolean interruptProcess(Method any)
                         throws InterruptedException

Aborts the ongoing exposure. There is only one process to be interrupted, that is an exposure thread.

Specified by:

interruptProcess in interface Asynchronous

Throws:

InterruptedException

abort

protected abstract boolean abort()
                          throws IOException

Interrupts an ongoing exposure.

Throws:

IOException

startScience

protected abstract boolean startScience()
                                 throws IOException

Starts a science exposure, i.e. an observation with opened shutter. This method should only start the exposure, the thread returned by #startExpose is built around this method by this class.

Throws:

IOException

startDark

protected abstract boolean startDark()
                              throws IOException

Starts a dark exposure, i.e. an observation with closed shutter.

Throws:

IOException

startBias

protected abstract boolean startBias()
                              throws IOException

Starts a bias exposure. Subclasses may divert that to startDark() with a small or zero exposure time.

Throws:

IOException

getReadoutStatus

protected abstract AsynchronousCcdDriver.Readout getReadoutStatus()
                                                           throws IOException

Returns the readout-status of the ccd.

Throws:

IOException

isExposing

public boolean isExposing()
                   throws IOException

We query the CCD if it is exposing.

Specified by:

isExposing in interface CcdDriver

Throws:

IOException

ensureReady

public boolean ensureReady()
                    throws IOException

If the current read-out status of the CCD is not IDLE, we query until it is.

Specified by:

ensureReady in interface CcdDriver

Returns:

True, if data is ready.

Throws:

IOException

expose

public int expose()
           throws IOException

Make an exposure. The exposure time and the data buffer must be set prior to a call to this function. Note that this method does not check for proper settings. In JB's driver the expos method does not block, thus we start an exposure and wait

Specified by:

expose in interface CcdDriver

Returns:

Number of pixel writtn.

Throws:

IOException - Any subclass of IOException.

See Also:

startExpose

exposeBias

public int exposeBias()
               throws IOException

Makes a bias exposure. If bias is not supported by the driver directly, this should be indicated by the #KEY_SUPPORTBIAS key set to false. In the latter case, this method thros an UnsupportedOperationException.

The data buffer has to be set prior to a call to this method.

Specified by:

exposeBias in interface CcdDriver

Returns:

Number of pixel writtn.

Throws:

IOException - Any subclass of IOException.

exposeDark

public int exposeDark()
               throws IOException

Makes a dark exposure. If dark is not supported by the driver, e.g. if no shutter is present, this should be indicated by the #KEY_SUPPORTDARK key set to false. In the latter case, this method thros an UnsupportedOperationException.

The data buffer has to be set prior to a call to this method.

Specified by:

exposeDark in interface CcdDriver

Returns:

Number of pixel writtn..

Throws:

IOException - Any subclass of IOException.

threadedExpose

public ExitThread threadedExpose()

Returns a thread that exposes the ccd for a science exposure when started. It live-time ends when the exposure finished.

Specified by:

threadedExpose in interface CcdDriver

Returns:

The thread that ends when the exposure is done.

See Also:

expose

threadedDarkExpose

public ExitThread threadedDarkExpose()

Returns a thread that exposes the ccd for a science exposure when started. It live-time ends when the exposure finished.

Specified by:

threadedDarkExpose in interface CcdDriver

Returns:

The thread that ends when the exposure is done.

See Also:

expose

threadedBiasExpose

public ExitThread threadedBiasExpose()

Returns a thread that exposes the ccd for a science exposure when started. It live-time ends when the exposure finished.

Specified by:

threadedBiasExpose in interface CcdDriver

Returns:

The thread that ends when the exposure is done.

See Also:

expose