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Subject: Re: StreamDevice hexa checksum in lowercase characters
From: "Paduan Donadio, Marcio" <marcio@slac.stanford.edu>
To: "Tech-talk@aps.anl.gov" <Tech-talk@aps.anl.gov>
Date: Thu, 7 Sep 2017 04:31:20 +0000

Thank you, Keenan!


It worked perfectly.


It is ugly, but I put the string in a variable, like this:


low_case = "%#/A/a/%#/B/b/%#/C/c/%#/D/d/%#/E/e/%#/F/f/";


out STX "590000%01<sum>" $low_case;


Best regards,


Márcio.



De: Lang, Keenan C. <klang@aps.anl.gov>
Enviado: quarta-feira, 6 de setembro de 2017 14:48
Para: Paduan Donadio, Marcio; Tech-talk@aps.anl.gov
Assunto: Re: StreamDevice hexa checksum in lowercase characters
 

If this is running on an operating system that has the PCRE library, you can enable the streams regex converter 


http://epics.web.psi.ch/software/streamdevice/doc/setup.html

epics.web.psi.ch
Setup 1. Prerequisites. StreamDevice requires either EPICS base R3.14.6 or higher or EPICS base R3.13.7 or higher. How to use StreamDevice on EPICS R3.13 is described ...


This will allow you to find and replace substrings before the string gets outputted. Unfortunately, the result looks a bit ugly:


out STX "590000%01<sum>%#/A/a/%#/B/b/%#/C/c/%#/D/d/%#/E/e/%#/F/f/";


From: tech-talk-bounces@aps.anl.gov <tech-talk-bounces@aps.anl.gov> on behalf of Paduan Donadio, Marcio <marcio@slac.stanford.edu>
Sent: Wednesday, September 6, 2017 1:14:44 PM
To: Tech-talk@aps.anl.gov
Subject: StreamDevice hexa checksum in lowercase characters
 

I have a TC-720 temperature controller that needs to receive an hexadecimal checksum:


Protocol file: 

(...)
read_low_alarm1
{
        out STX "590000%01<sum>";
        in STX "%4x%01<sum>";
}

(...)


The output was:

*5900002E\r


The problem is: that final "E" must be "e" lowercase, or the equipment return an error code. How can I make <sum> output a lowercase character?


Thank you,


Márcio Paduan Donadio
Control Systems Engineer
SLAC National Accelerator Laboratory
Advanced Instrumentation for Research Division
2575 Sand Hill Rd
Menlo Park CA 94025
Office (650) 926-5007​



References:
StreamDevice hexa checksum in lowercase characters Paduan Donadio, Marcio
Re: StreamDevice hexa checksum in lowercase characters Lang, Keenan C.

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