Richard Owlett  wrote:
> The references I was given did not make it make simple to select
> mutually compatible components

In general terms (I've not looked much at screens) Raspberry Pi
compatible devices (calling them components seems a little confusing
to me, as that would imply the parts on the rPi board itself) connect
directly to the Pi rather than to each other. So it's a question
simply of what interfaces the Pi has, and what devices connect to
those interfaces.

> -- the required information being
> scattered among multiple tables or URLs.
>
> I propose to create a single spreadsheet {likely distributed in the TAB
> delimited variation of a CSV file}.
>
> I have two specific questions:
>   1. Has this been done before?

I don't think so. If so, I'd imagine it would only cover devices that
connect to the GPIO header (Pi HATs are the standardised form).
There's also the camera connector, I don't know what connects to that
besides cameras and adapters relating to them.

If you include the industry-standard interfaces like USB, HDMI, and
Composite video, then obviously the sky's the limit. Every TV
manufactured since they started putting Composite video inputs on
them would have to be included, for example.

>   2. Is there an already existing site that would accept it?
>      {Their submission requirement could affect my layout.}
>      {I'm still working on column headings that would balance
>       coverage and simplicity ;}

There's a wiki with extensive documentation relating to the Pi here:
https://elinux.org/RPi_Hub

However even if the scope of your "compatibility matrix" was limited
just to GPIO devices (so as to be vaguely achieveable), it would be
borderline unmaintainable given the number of boards that come and
go all the time. Plus it would probably get too long to be easily
read/filtered. You'd really want some sort of database back-end
and a moderated public submissions/editing system. With a good web
interface that could be quite handy, so long as people do actually
maintain it.

If you're just looking to document compatible devices that _you_ are
interested in, then I'd suggest it would be better published on a
personal site, if at all, because it will probably not be helpful
for most other people.

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