Re: StreamDevice hexa checksum in lowercase characters

["Lang, Keenan C." <klang@aps.anl.gov>]

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

StreamDevice: Setup - PSI

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/";

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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​