Re: StreamDevice mbbi format-converter problem

["Mooney, Tim M. via Tech-talk" <tech-talk@aps.anl.gov>]

Hi Yong,

get_units { out "REMOTE; CHAN \$1; UNITS?";  in "%{cm|in|\?}"; }

worked!  Thanks for your help.

Tim Mooney (mooney@anl.gov) (630)252-5417
Beamline Controls Group (www.aps.anl.gov)
Advanced Photon Source, Argonne National Lab

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From: Hu, Yong <yhu@bnl.gov>
Sent: Thursday, April 8, 2021 11:55 AM
To: Mooney, Tim M. <mooney@anl.gov>; tech-talk@aps.anl.gov <tech-talk@aps.anl.gov>
Subject: Re: StreamDevice mbbi format-converter problem

 

Hi Tim,

 

Quick search “%%” on https://paulscherrerinstitute.github.io/StreamDevice/formats.html , “%%” or “\%” should have worked.

Nonetheless, give a try on this (basically use \? for enum value 2):

get_units { out "REMOTE; CHAN \$1; UNITS?";  in "%{cm|in|\?}"; }

 

Cheers,

Yong

 

From: Tech-talk <tech-talk-bounces@aps.anl.gov> on behalf of "tech-talk@aps.anl.gov" <tech-talk@aps.anl.gov>
Reply-To: "Mooney, Tim M." <mooney@anl.gov>
Date: Thursday, April 8, 2021 at 11:52 AM
To: "tech-talk@aps.anl.gov" <tech-talk@aps.anl.gov>
Subject: StreamDevice mbbi format-converter problem

 

Dear folks,

 

I have an mbbi record with streamDevice support, and the following protocol:

get_units { out "REMOTE; CHAN \$1; UNITS?";  in "%{cm|in|%%}"; }

 

Here is the record definition:

record(mbbi, "$(device):UNITS")

{

    field(DESC, "Units")

    field(DTYP, "stream")

    field(INP,  "@cryomagLM510.proto get_units($(chan)) $(port)")

    field(ZRST, "cm")

    field(ONST, "in")

    field(TWST, "%")

    field(SCAN, "Passive")

}

 

When the device response is "cm" or "in" it is handled correctly, but when the response is "%" the record value doesn't change, even though the asyn trace output shows that the character received actually was "%"

 

2021/04/08 10:03:28.517 164.54.115.98:4266 write 23

REMOTE; CHAN 1; UNITS?

2021/04/08 10:03:28.617 164.54.115.98:4266 read 3

%

 

(Three characters are received because the input terminator is "interminator  = CR LF;")

 

Originally, I had the protocol wrong because I didn't realize the "%" would be treated as a format converter:

get_units { out "REMOTE; CHAN \$1; UNITS?";  in "%{cm|in|%}"; }

But then I tried changing the protocol file to this:

get_units { out "REMOTE; CHAN \$1; UNITS?";  in "%{cm|in|\%}"; }

followed by streamReload(), which didn't work, and finally to this:

get_units { out "REMOTE; CHAN \$1; UNITS?";  in "%{cm|in|%%}"; }

followed by streamReload(), which also didn't work.

 

I'm using StreamDevice-2-8-9.  I can't figure out what I'm doing wrong.

 

Tim Mooney (mooney@anl.gov) (630)252-5417
Beamline Controls Group (www.aps.anl.gov)
Advanced Photon Source, Argonne National Lab