[Halld-tagger] Fwd: firmware for TAGM Vbias control board

[Richard Jones]

Sending again, in case you didn't get it when it was originally sent
earlier in the week.  I did not get a copy sent back to me, and one other
person said they did not see it either.
-rtj

---------- Forwarded message ----------
From: Richard Jones <richard.t.jones at uconn.edu>
Date: Thu, Jan 2, 2014 at 9:35 AM
Subject: firmware for TAGM Vbias control board
To: Hall D beam working group <halld-tagger at jlab.org>


Dear colleagues,

Happy New Year to you all.  I would like to request that we all start off
the New Year with our first biweekly meeting on 1/6 next Monday.  We need
to coordinate that with the Physics working group, but since we were the
first to miss a meeting due to the shutdown, I think we can claim the first
slot in the New Year.

Prior to Monday's meeting, I would like to share a document in which I
describe the design and simulation of the firmware for the Vbias controller
for the tagger microscope, which controls the individual bias voltages for
each of the 500 SiPMs in the system.  This firmware is what we will be
burning into the boards over the next several weeks, before getting ready
to ship them to Jlab. It is important that this firmware be robust and
contain reasonable protections against human error and bugs in the host
software.  The google doc linked below is enabled for comments.  If you are
not interested in the internals of FPGA programming, you can skip to the
end where the configuration parameters and the interface specification are
described.

https://docs.google.com/document/d/1Evq3ADdVlSgwU-dpQIJtLzEcPaK99kJfnDFwvU-BUfQ/edit?usp=sharing

Comments are welcome.

-Richard J.
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