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<== Date ==>		<== Thread ==>

Subject:	How to handle adjusting values as they change independent of the driver in an asynPortDriver?
From:	"Wlodek, Jakub via Tech-talk" <tech-talk at aps.anl.gov>
To:	"tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov>
Date:	Wed, 2 Sep 2020 13:39:02 +0000

Hi all,

I had a question about best practices for writing an asynPortDriver or more specifically an areaDetector driver.

The cameras I am writing support for allow for auto-gain and auto-exposure modes, that adjust the gain and exposure

internally based on the recieved image. At the moment, I show this updating in my screens by in the main image processing

thread loop grabbing the pv value for auto-gain and auto-exposure, and if either is on, I ping the camera for the current value

an update the value in the parameter library and run callParamCallbacks.

Would this be a "best practices" solution, or is there a better way to do this? I was thinking maybe something could be

done with EPICS record SCAN fields, or maybe the readInt32 method.

Thanks,

Jakub

Replies:: Re: How to handle adjusting values as they change independent of the driver in an asynPortDriver? Mark Rivers via Tech-talk

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ANJ, 03 Sep 2020