XpressNet-Analyzer

(Work in Progress)

A high level logic analyzer for Saleae Logic 2.

This extension provides support for XpressNet 3.0 a protocol by Lenz which is a protocol used in model railroads for communication. To use this analyzer you first need an Async-Serial low lever decoder.

All packets are based on this documentation: XpressNet-V3.0 and XpressNet-V3.6

This analyzer is not complete, the table shows the current progress

From command station to device:

* = Multiple packages of the same type

Name	Type	Implemented
Normal inquiry	Inquiry	x
Request Acknowledgment	Request	x
Normal operation resumed	Broadcast	x
Track power off	Broadcast	x
Emergency stop	Broadcast	x
Service Mode entry	Broadcast	x
Feedback Broadcast	Broadcast
Programming info *	Response
Service Mode Response *	Response
Software Version	Response	X
Command station status indication	Response	X
Transfer Errors	Response
Command station busy response	Response
Instruction not supported	Response
Accessory Decoder information	Response	X
Locomotive information *	Response
Locomotive is being operated	Response
Function status	Response
Locomotive information (address retrieval)	Response
Double Header *	Multiple
MU+DH error		Response

From device to command station:

Name	Type	Implemented
Acknowledgment Response	Response	X
Resume operations	Request	X
Stop operations	Request	X
Stop all locomotives	Request
Emergency stop a locomotive	?
Register Mode read	Request
Direct Mode CV read	Request
Paged Mode read	Request
Service Mode results	Request	X
Register Mode Write	Request
Direct Mode CV Write	Request
Paged Mode write	Request
Command station software version	Request	X
Command station status	Request	X
Set command station power-up mode	?
Accessory Decoder information	Request	X
Accessory Decoder operation	Request	X
Locomotive information	Request
Function status	Request
Locomotive speed and direction	Instructions	X
Function operation	Instructions	X
Set function state	?
Double header *	Multiple
Operations Mode programming byte mode write	Request
Operations Mode programming bit mode write	Request
Add a locomotive to a multi-unit	Request
Remove a locomotive from a multi-unit	Request
Address inquiry member of a multi-unit	Request
Address inquiry multi-unit	Request
Address inquiry locomotive at command station	Request
Delete locomotive from command station stack	Request

Following ROCONET extensions have been implemented:

• Track power off: Short circuit

TODOs:

• Allow setting the accessory decoder address format (turnout, switching decoder, feedback module)
• Handle other accessory decoders than switching decoders