[Arm-netbook] ULP-COM

[luke.leighton]

On 11/15/12, jm <joem at martindale-electric.co.uk> wrote:

> Hi Luke,
>
> The way I saw it was that SoMs are just EOMAs without a metal case :-)

 oo no it's definitely not. SoMs are "kitchen sinks" with no
user-facing interfaces (like you suggested about SDcard).  with EOMA
what i did was go "ok, compromise.  use 'bus' interfaces and then
require people to use them, put down generic components - USB, I2C
etc".  want audio as I2S or AC97? tough - find a USB-based solution.
want RS232? tough - find a USB-based or I2C-based solution.

 surprisingly this hasn't turned out to be as bad as it sounds... *if*
you get smart and use an Embedded Controller on the I/O Board.
but.... people who've been on this list for a while have heard me go
on about that quite a lot already so i'll not do it again :)

> The guys at cubieboard http://www.cubieboard.org have published their
> circuit
> http://dl.cubieboard.org/hardware/cubieboard_schematic_2012-08-08.pdf
> (but I only see it yesterday) and this is cue for me to go copy all the
> relevant bits asap to get a SoM built and then share asap for you
> to build in lightening quick time the EOMA! :-)

 cool! no - more than cool: awesome. well if you like i can get you
some ORCAD files, i did some stuff last year, it's still relevant.  or
if you want to use kicad, there's some schematics i put together for
an A10 EOMA-68 card still in the git repo, same circuit (i duplicated
it into kicad). the PCB layout is the tricky bit, i certainly can't
handle that part otherwise i would have done so by now.

 wild.  btw, you wanna do this as an open project, free software
licensed, GREAT, that's fine by me.

 l.