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Subject: Re: streamDevice protocol - accept two different valid responses
From: "Ford, Christopher" <caf@slac.stanford.edu>
To: "James.OHea@diamond.ac.uk" <James.OHea@diamond.ac.uk>
Cc: "tech-talk@aps.anl.gov" <tech-talk@aps.anl.gov>
Date: Fri, 24 Feb 2017 18:08:23 +0000

Hi James,


In my experience what works well is to create an input record for each valid response format.  Use SCAN="I/O Intr" on these input records; streamDevice will automatically look for matches in parallel.


Separately, create an output record (SCAN="Passive") to send out the command.


It may be possible to create a regular _expression_ that matches all your valid formats.  Creating multiple input records turned out to be simpler in my case.


Thanks,

 -Chris Ford

  SLAC



From: tech-talk-bounces@aps.anl.gov <tech-talk-bounces@aps.anl.gov> on behalf of James.OHea@diamond.ac.uk <James.OHea@diamond.ac.uk>
Sent: Friday, February 24, 2017 8:24 AM
To: tech-talk@aps.anl.gov
Subject: streamDevice protocol - accept two different valid responses
 

Hello,

 

I’m using streamDevice to handle serial data with a protocol file.

 

I can get two different valid responses to the same command.  Below are the protocol strings that match the two different responses:

 

%(\$1:C)f;L1;%(\$1:L1)f;;%(\$1:F1)f

%(\$1:C)f;;%(\$1:F1)f

 

What’s the easiest/most sensible way of making it accept either response?

 

I got it working by making one of the strings a mismatch condition but this means the record‘s severity is raised.

 

Thanks for any advice,

 

James

 

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References:
streamDevice protocol - accept two different valid responses James.OHea

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