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<== Date ==> <== Thread ==>
Subject: RE: Python Script call from Button press, module not found
From: "Manoussakis, Adamandios via Tech-talk" <tech-talk at aps.anl.gov>
To: EPICS tech-talk <tech-talk at aps.anl.gov>
Date: Fri, 16 Apr 2021 21:25:48 +0000

Thanks everyone for your input!

 

Thanks for the suggestion Kay, ill have to look into PCASPY some more but would this be similar to using pyepics as an interface to CA?  Right now it looks like either move it to an IOC (pythonIoc), translate it over to C (regular IOC), or throw some pyepics in the python script and have it run an event loop looking for a PV change.

 

From: Tech-talk <tech-talk-bounces at aps.anl.gov> On Behalf Of Kasemir, Kay via Tech-talk
Sent: Friday, April 16, 2021 10:52 AM
To: tech-talk at aps.anl.gov
Subject: Re: Python Script call from Button press, module not found

 

Hi:

 

If the goal is that writing to a PV triggers something in python, wouldn't it be more straight forward to have a python-based CA server?

It serves the "DoIt" PV, and writing to that PV makes the python code do something.

PCASPY, https://pcaspy.readthedocs.io/en/latest/, allows you to implement just that, without need to first create some 'mailbox' IOC for serving the value, then having a script poll/monitor that PV for changes.

With PCASPY you can also support put-callback, so clients writing to the PV can not only trigger whatever you want to happen, but they can also get notified when the action completes.

 

-Kay

 

References:
Python Script call from Button press, module not found Manoussakis, Adamandios via Tech-talk
Re: Python Script call from Button press, module not found Kasemir, Kay via Tech-talk
RE: Python Script call from Button press, module not found Manoussakis, Adamandios via Tech-talk
Re: Python Script call from Button press, module not found Matt Newville via Tech-talk
Re: Python Script call from Button press, module not found Johnson, Andrew N. via Tech-talk
RE: Python Script call from Button press, module not found Manoussakis, Adamandios via Tech-talk
Re: Python Script call from Button press, module not found Johnson, Andrew N. via Tech-talk
Re: Python Script call from Button press, module not found Ben Franksen via Tech-talk
RE: Python Script call from Button press, module not found Layne (US), William C via Tech-talk
Re: Python Script call from Button press, module not found Kasemir, Kay via Tech-talk
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