Module vcr4j.rs422

Package org.mbari.vcr4j.rs422

Class RS422ResponseParser

java.lang.Object

org.mbari.vcr4j.rs422.RS422ResponseParser

public class RS422ResponseParser
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static final byte[]	ACK
static final byte[]	NACK

Constructor Summary

Constructors

Constructor	Description
RS422ResponseParser()

Method Summary

Modifier and Type	Method	Description
static byte	calculateChecksum(byte[] command)	The last byte in a command block is the checksum, i.e.
io.reactivex.rxjava3.subjects.Subject<RS422Error>	getErrorObservable()
io.reactivex.rxjava3.subjects.Subject<RS422State>	getStatusObservable()
io.reactivex.rxjava3.subjects.Subject<RS422Timecode>	getTimecodeObservable()
io.reactivex.rxjava3.subjects.Subject<RS422Userbits>	getUserbitsObservable()
static boolean	isAck(byte[] cmd)	Checks to see if the reply is an ack (acknowledgement)
static boolean	isNack(byte[] cmd)	Checks to see if the reply is a nack (i.e error)
void	update(byte[] command, byte[] cmd, byte[] data, byte[] checksum)
void	update(byte[] command, byte[] cmd, byte[] data, byte[] checksum, VideoCommand videoCommand)	Update the state objects associated with the VCR's response

Methods inherited from class java.lang.Object

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

Field Details

ACK

public static final byte[] ACK

NACK

public static final byte[] NACK

Constructor Details

RS422ResponseParser

public RS422ResponseParser()

Method Details

calculateChecksum

public static byte calculateChecksum(byte[] command)

The last byte in a command block is the checksum, i.e. the lower eight bits of the sum of the other bytes in the command block

Parameters:

command - The byte array to to calculate a checksum

Returns:

The checksum value of the command

update

public void update(byte[] command,
 byte[] cmd,
 byte[] data,
 byte[] checksum)

update

public void update(byte[] command,
 byte[] cmd,
 byte[] data,
 byte[] checksum,
 VideoCommand videoCommand)

Update the state objects associated with the VCR's response

Parameters:

command - The command that was sent to the VCR

cmd - The command portion of the VCR's reply

data - The data portion of the VCR's reply

checksum - The checksum of the VCR's reply

videoCommand - The video command

isAck

public static boolean isAck(byte[] cmd)

Checks to see if the reply is an ack (acknowledgement)

Parameters:

cmd - byte array of command.

Returns:

True if the reply is ACK

isNack

public static boolean isNack(byte[] cmd)

Checks to see if the reply is a nack (i.e error)

Parameters:

cmd - the cmd we're checking to see if it's a NACK

Returns:

True if the reply is NACK

getErrorObservable

public io.reactivex.rxjava3.subjects.Subject<RS422Error> getErrorObservable()

getStatusObservable

public io.reactivex.rxjava3.subjects.Subject<RS422State> getStatusObservable()

getTimecodeObservable

public io.reactivex.rxjava3.subjects.Subject<RS422Timecode> getTimecodeObservable()

getUserbitsObservable

public io.reactivex.rxjava3.subjects.Subject<RS422Userbits> getUserbitsObservable()