Re: [EXTERNAL] Phoebus: How to populate table widget with waveform array

["Kasemir, Kay via Tech-talk" <tech-talk at aps.anl.gov>]

The formula

  =elementAt(`NameOfWaveformPV`, 2)

picks element 2 from the waveform.

 

With that, you can create a bunch of Labels and TextUpdate widgets to show your data like this:

 

Label with text “U0”, TextUpdate with PV “=elementAt(`NameOfWaveformPV`, 0)”

..

Label “I1”, TextUpdate  “=elementAt(`NameOfWaveformPV`, 3)”

 

Instead of manually creating 256 widgets like that, you could use https://github.com/als-epics/phoebusgen

 

 

From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of Simon Friederich via Tech-talk <tech-talk at aps.anl.gov>
Date: Tuesday, May 6, 2025 at 12:10 PM
To: tech-talk at aps.anl.gov <Tech-talk at aps.anl.gov>
Subject: [EXTERNAL] Phoebus: How to populate table widget with waveform array

Dear EPICS community, I have a waveform PV with 256 elements containing the following (see another topic in the tech talk from me): U0, I0, U1, I1, U2, I2, .. . , U127, I127 i. e. the measured voltage and current of a 128 channel poweruppl

Dear EPICS community,

I have a waveform PV with 256 elements containing the following (see another topic in the tech talk from me):

U0, I0, U1, I1, U2, I2, ... , U127, I127

i.e. the measured voltage and current of a 128 channel power supply (updated every 10 seconds).

I want to display this and thought about the table widget (I've also tested the array widget, but here I'd need to be able to select even and odd numbers, which I don't know if that was possible; I don't want to place 256 text update fields).

Has anyone worked with the table widget in Phoebus before like this? I guess I'd have to work with a script here?

Best regards
Simon