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Hi Tom,<br>
<br>
Well, it is a specification for the DE board, which is only part of
the TangerineSDR system.<br>
<br>
What we need, I guess, is a System Specification that is more like a
Theory of Operation. I kind of suggested it in the first section,
but it was not a full description because I felt it did not belong
in the DE specification.<br>
<br>
Most of the I/O (shields, hats, mezzanines) is for low-speed (i.e.,
sensors) expansion.<br>
<br>
After adding up the cost of all those expansion connectors, I am
ready to but one large "expansion" connector on board, and build
individual custom shields instead of trying to accommodate existing
off-the-shelf shields.<br>
<br>
I will look at the out of order section numbers. Word tends to do
that to you when you move sections around.<br>
<br>
73,<br>
Scotty WA2DFI <br>
<br>
<div class="moz-cite-prefix">On 2019-04-24 20:31, Tom McDermott
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CACO3nRQ_ayjpvwQvthTRraRxLv-evqH4Q4zWdrH1a2-ck-1ZCA@mail.gmail.com">
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<div dir="ltr">
<div>Hi Scotty - you've been busy! Nice job on the document.</div>
<div><br>
</div>
<div>It may be useful to provide a little context for a few
things:</div>
<div><br>
</div>
<div>1. There are a lot of connector for things I don't know
anything about (and have never heard of!).</div>
<div> * Would it be useful to add some description about what
the 'Click' interface does, or how it might be used? Same for
PMOD, Ultra96, GroveIO, etc.<br>
</div>
<div> * Same for all the various memory and flash units, etc.
Which are in the data path? control path? Which are used for
booting/loading the FPGA?</div>
<div> * I know what an Arduino is, but why would there be such
an interface on the unit? Could we perhaps provide a useful
example?</div>
<div><br>
</div>
<div>2. The document feels a little bit like the
cart-before-the-horse. For me a system description would help</div>
<div>understand the DE a lot better. It might provide more
detailed examples of: <br>
</div>
<div> * How would this be used in the PSWS application? What
sub-modules are populated, what does each one do?</div>
<div> * Which connector or submodules are not probably used for
the PSWS? This could change with time of course.<br>
</div>
<div> * What non-PSWS applications have needs that occupy some
of the connectors? What do those submodules do? <br>
</div>
<div><br>
</div>
<div><br>
</div>
<div>-- Tom, N5EG<br>
</div>
<div><br>
</div>
<div><br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Wed, Apr 24, 2019 at 5:36
PM Scotty Cowling via TangerineSDR <<a
href="mailto:tangerinesdr@lists.tapr.org"
moz-do-not-send="true">tangerinesdr@lists.tapr.org</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">OK,
here is what I have so far on the DE (Data Engine).<br>
<br>
Comments welcome.<br>
<br>
Especially if you see something that needs to be added, or see
something <br>
that you think does not belong.<br>
<br>
We will be able to depopulate certain functionality to provide
<br>
lower-cost DE versions, but I wanted to be able to fulfill the
PSWS and <br>
P4G requirements (at least the ones that we know of) without
any <br>
additional shields/hats/mezzanine or I/O expanders. The Pmod
headers <br>
should handle the PSWS magnetometer, which is the only sensor
that I <br>
think is required.<br>
<br>
After we have a first look and correct the typos, I can put it
up on <br>
Github and/or the PSWS Google group.<br>
<br>
73,<br>
Scotty WA2DFI<br>
-- <br>
TangerineSDR mailing list<br>
<a href="mailto:TangerineSDR@lists.tapr.org" target="_blank"
moz-do-not-send="true">TangerineSDR@lists.tapr.org</a><br>
<a
href="http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org"
rel="noreferrer" target="_blank" moz-do-not-send="true">http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org</a><br>
</blockquote>
</div>
</blockquote>
<br>
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