[Dsg-hallc_nps] [EXTERNAL] NPS LED/VLD controller specs/information/summary

[Aaron Brown]

Hi Brad,

Brian will be on vacation from 11/24/2022 until 01/03/2023.
He will begin working on the control scripts that utilize the existing Linux drivers and is confident that this can be completed by early January 2023.
With regards to the "Beta quality GUI", the EPICS drivers would need to be completed before we could finish this.
The layout of the GUI is done, we just need the PVs before we can move to the testing/debugging phase.
for the EPICS drivers, it would be a good idea to see if someone from the FE/DAQ group could complete the task.

Happy Thanksgiving!

-- Aaron
________________________________
From: Brad Sawatzky <brads at jlab.org>
Sent: Monday, November 21, 2022 6:42 PM
To: Bryan Moffit <moffit at jlab.org>; dsg-hallc_nps at jlab.org <dsg-hallc_nps at jlab.org>
Cc: Brian Eng <beng at jlab.org>; Aaron Brown <ambrown at jlab.org>; William Gu <jgu at jlab.org>; Chris Cuevas <cuevas at jlab.org>; Robert Michaels <rom at jlab.org>
Subject: [EXTERNAL] NPS LED/VLD controller specs/information/summary

After recent discussions with Bryan and William, I volunteered to send
out a status/summary on the NPS LED/VLD needs for the near (Dec/Jan)
and medium term (Feb/Mar).


- Operational specs for the LED pulser are in William's directories.
  - His software libraries and test code can be found here:
       /group/da/distribution/coda/Hardwaremanual/VLD/
    or from the CODA web page.  The test software can be accessed from
       /daqfs/home/jgu/Triggersoftware/trigger.c, VLDtestN functions.
  There are docx files in the /group directory with specs and technical
  details.  Ideally we would be running the software under linux (intel
  vme computer), so any vxworks specific code should be updated to
  compile in that environment.
  - I am attaching what I think is the most recent spec document for
    easy access:  'VLD.docx'

- A Control/GUI requirements summary is attached as a text file.
  - See: 'LED-GUI-summary-21Nov2022.txt'

- Here is a link to some (intel controller) development code from Bryan
  Moffit: https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_JeffersonLab_vld&d=DwIDAw&c=CJqEzB1piLOyyvZjb8YUQw&r=TkJUDpm1-rWCci4nhe47n5XMOLWvRg1TNSqSgPyxyhs&m=1N3fMPIfm78FoxmXp_mXreXU8E0U2i30VAPa6A-PqDvhIBy5Wm1U9gzMBHv6iWyH&s=B6Fs97LKHZhH97IC2bajCCDXfhExhHaLYIvGerKATkM&e=


---------------------------------------------
Near Term Requirements (ie. late-Dec/early-January)
---------------------------------------------
- We don't need a full working GUI, but we do need a clear, student-
  accessible way to run specific tests.
  * I am imagining a set of pre-compiled, special-case binaries or
    script(s) that are run from a command-line running on the VME
    contoller(s)

- The scripts should be able to do the following:
  A.  Turn all LED on in bleach mode
    * This should also set the Trg_out NIM ouput logic HI *first*
      and that needs to be tied into the HV interlock circuit.

  B.  Pulse one or more specified LEDs when a pulse is seen on the VLD
      Trg/Clk input.
      - The list of LEDs to be activated, pulse characteristics, etc can
        either be hardcoded, or read-in via a config file.  Doesn't have
        to be perfect, just needs to work.  We can fine-tune later.


---------------------------------------------
'Beta' quality GUI (Feb, early-March)
---------------------------------------------
- NPS installation begins this spring -- that will come very soon!

* We will need at least a 'beta' quality (ie. feature complete, but may
  be buggy) GUI by Feb/early-March so we can test and fix bugs before
  the systems is disassembled and moved to the Hall.  It will be a while
  before it is working again in the Hall and we definitely do not want
  to leave testing this critical system to the summer.

-- Brad

--
Brad Sawatzky (he/him), PhD <brads at jlab.org> -<>- Jefferson Lab/SciComp/F272
Ph: 757-269-5947  -<>-  Fax: 757-269-5235  -<>- Pager: brads-page at jlab.org
The most exciting phrase to hear in science, the one that heralds new
  discoveries, is not "Eureka!" but "That's funny..."   -- Isaac Asimov
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