Package jmri.jmrix.can.adapters.gridconnect.canrs

Class MergReply

java.lang.Object

jmri.jmrix.AbstractMessage

jmri.jmrix.AbstractMRReply

jmri.jmrix.can.adapters.gridconnect.GridConnectReply

jmri.jmrix.can.adapters.gridconnect.canrs.MergReply

All Implemented Interfaces:

Message

public class MergReply
extends GridConnectReply

Class for replies in a MERG GridConnect based message/reply protocol.

The GridConnect protocol encodes messages as an ASCII string of up to 24 characters of the form: :ShhhhNd0d1d2d3d4d5d6d7;

hhhh is the two byte (11 useful bits) header The S indicates a standard CAN frame :XhhhhhhhhNd0d1d2d3d4d5d6d7; The X indicates an extended CAN frame Strict

Gridconnect protocol allows a variable number of header characters, e.g., a header value of 0x123 could be encoded as S123, X123, S0123 or X00000123.

MERG hardware uses a fixed 4 or 8 byte header when sending GridConnectMessages to the computer. The 11 bit standard header is left justified in these 4 bytes. The 29 bit standard header is sent as <11 bit SID><0><1><0>< 18 bit EID> N or R indicates a normal or remote frame, in position 6 or 10 d0 - d7 are the (up to) 8 data bytes

Field Summary

Fields inherited from class jmri.jmrix.AbstractMRReply

DEFAULTMAXSIZE

Fields inherited from class jmri.jmrix.AbstractMessage

_dataChars, _nDataChars

Constructor Summary

Constructors

Constructor	Description
MergReply()	Create new MergReply.
MergReply(String s)	Create new MergReply from String.

Method Summary

Modifier and Type	Method	Description
int	getHeader()	Get the CAN header from MERG format in digits 2 to 9.

Methods inherited from class jmri.jmrix.can.adapters.gridconnect.GridConnectReply

basicFormatCheck, createReply, getByte, getElement, getNumBytes, getNumDataElements, isExtended, isRtr, maxSize, setData, setElement, setNumDataElements, skipPrefix

Methods inherited from class jmri.jmrix.AbstractMRReply

flush, getOpCode, isBinary, isRetransmittableErrorMsg, isUnsolicited, match, pollValue, setBinary, setOpCode, setUnsolicited, skipWhiteSpace, toString, value

Methods inherited from class jmri.jmrix.AbstractMessage

equals, hashCode

Methods inherited from class java.lang.Object

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

Methods inherited from interface jmri.jmrix.Message

toMonitorString

Constructor Details

MergReply

public MergReply()

Create new MergReply.

MergReply

public MergReply(String s)

Create new MergReply from String.

Parameters:

s - Frame data to create MergReply from.

Method Details

getHeader

public int getHeader()

Get the CAN header from MERG format in digits 2 to 9.

Overrides:

getHeader in class GridConnectReply

Returns:

the CAN header as an int