Ah, interesting... I'd seen that earlier but was a bit confused by the pin labels on the 40-pin header in the Parlor board schematic.  In the Tobi case, it's clear which pins (at least some) can be used as GPIO.

Thanks...

Jeremy


On Tue, Nov 19, 2013 at 2:21 AM, Conor O'Rourke <conor.orourke@scorpionnetworks.com> wrote:
Your best best is to refer to the Omap datasheet which will show you
all the multiplexes for all these pins. Then backreference to the mux
header file. Search this mailing list, someone recently was showing
how to change them at runtime*. Given that I've made a table of these
already I'll put them in the user wiki when I get time. Might be
useful. Most pins default to Mode 7 with pull up or pull down on reset
which can  affect which GPIOs you use for which purpose - ie: if you
don't want the pin high or low on reset, choose accordingly, or pull
the pin harder than the 100uA OMAP current does. SPI is interesting in
this regard as it pulls different ways on different chip selects.

Conor.

* found it: Philipp Lutz's post in September which was rather useful:
http://gumstix.8.x6.nabble.com/Newbie-Duovero-GPIO-question-td4967968.html#a4967971

On Tue, Nov 19, 2013 at 7:42 AM, Ash Charles <ashcharles@gmail.com> wrote:
> Hey Jeremy,
>
> Many of the signals can be mux'ed as GPIOs (e.g. MCSPIx,
> BSPx...)---they are simply brought out under their default name.
>
> --Ash
>
> On Tue, Nov 19, 2013 at 12:01 AM, Jeremy Zawodny <Jeremy@zawodny.com> wrote:
>> Looking at the schematic:
>>
>> http://pubs.gumstix.com/boards/PARLOR/PCB40002-R3902/B40002.pdf
>>
>> I don't see any GPIO pins on the 40-pin header, unlike the Tobi boards.  Am
>> I missing something?
>>
>> Jeremy
>>
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