[TangerineSDR] Data Engine Specification, Rev 0.1

[Scotty Cowling]

Hi Tom,

Well, it is a specification for the DE board, which is only part of the 
TangerineSDR system.

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.

Most of the I/O (shields, hats, mezzanines) is for low-speed (i.e., 
sensors) expansion.

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.

I will look at the out of order section numbers. Word tends to do that 
to you when you move sections around.

73,
Scotty WA2DFI

On 2019-04-24 20:31, Tom McDermott wrote:
> Hi Scotty - you've been busy!   Nice job on the document.
>
> It may be useful to provide a little context for a few things:
>
> 1. There are a lot of connector for things I don't know anything about 
> (and have never heard of!).
>  * 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.
>  * 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?
>  * I know what an Arduino is, but why would there be such an interface 
> on the unit? Could we perhaps provide a useful example?
>
> 2. The document feels a little bit like the cart-before-the-horse.  
> For me a system description would help
> understand the DE a lot better.  It might provide more detailed 
> examples of:
>  * How would this be used in the PSWS application? What sub-modules 
> are populated, what does each one do?
>  * Which connector or submodules are not probably used for the PSWS?  
> This could change with time of course.
>  * What non-PSWS applications have needs that occupy some of the 
> connectors? What do those submodules do?
>
>
> -- Tom, N5EG
>
>
>
> On Wed, Apr 24, 2019 at 5:36 PM Scotty Cowling via TangerineSDR 
> <tangerinesdr at lists.tapr.org <mailto:tangerinesdr at lists.tapr.org>> wrote:
>
>     OK, here is what I have so far on the DE (Data Engine).
>
>     Comments welcome.
>
>     Especially if you see something that needs to be added, or see
>     something
>     that you think does not belong.
>
>     We will be able to depopulate certain functionality to provide
>     lower-cost DE versions, but I wanted to be able to fulfill the
>     PSWS and
>     P4G requirements (at least the ones that we know of) without any
>     additional shields/hats/mezzanine or I/O expanders. The Pmod headers
>     should handle the PSWS magnetometer, which is the only sensor that I
>     think is required.
>
>     After we have a first look and correct the typos, I can put it up on
>     Github and/or the PSWS Google group.
>
>     73,
>     Scotty WA2DFI
>     -- 
>     TangerineSDR mailing list
>     TangerineSDR at lists.tapr.org <mailto:TangerineSDR at lists.tapr.org>
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>

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