Re: Question about the best practice for integrating a stepper motor Python library into EPICS

[Mark Rivers via Tech-talk <tech-talk at aps.anl.gov>]

Hi Alex,

• I have an in-house built stepper motor controller and a python library to control it. 
• It simply opens a TCP socket, sends a command bytecode and queries some state bytes.

Do you mean that the Python library opens a socket to the controller and sends a command bytecode and queries bytes from the hardware?

Or do you mean that external software (like EPICS) opens a socket to the Python library and sends a bytecode?  

In other words is the Python library a socket server, or a socket client?

If the Python library is a socket client then how complex is it?  It might just be easier to replace it with a C++ asynMotorController that sends the bytecode and parses the response.

Mark

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From: Tech-talk on behalf of Alexander Kessler via Tech-talk
Sent: Thursday, May 11, 2023 5:44 AM
To: tech-talk at aps.anl.gov
Subject: Question about the best practice for integrating a stepper motor Python library into EPICS

Dear community,

I have an in-house built stepper motor controller and a python library
to control it. It simply opens a TCP socket, sends a command bytecode
and queries some state bytes.
I would like to include the Python code in EPICS as my first productive
EPICS exercise. In C++, I would take EPICS engine module and create a
child class of asyncMotorControler.  But what is the best way to handle
it with Python? Is there an equivalent to C++ parent class on CAPROTO basis?

Thanks and best wishes,

AlexK

--
Alexander Kessler

Helmholtz-Institut-Jena
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email:    alexander.kessler at uni-jena.de
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