Re: GPIO on consoleLCD-VX

Hi John,

> Oh my God!
>
> Thanks a million Dave,
>     and as for my reaction to it I didn't think I'd have to start
> looking at schematics
> Oh well. ;-)

The reason to look at the schematics is to figure out the signal names
that actually come out the connectors. For many things, looking at
this page will suffice:
<http://docswiki.gumstix.com/Verdex_60pin_connector_chart>

But you won't find X_MOSI there. Instead, you'll find SSPTXD2.

So that's the reason I go to the schematics.

> There are a few points that I could soler to on the ConsoleLCD-vx
> which have labels on.
> I'll go and dig out the schematics and see which I can get to that is
> not used. There's
>
> AC9

This is really AC97 - for the audio subsystem.

> NSSP

Also known as SPI.

> A2D

These lines come from the touch screen controller found on the
consoleLCD-vx board and not directly form the gumstix.

> I2C

On the verdex, these can be used as GPIO. On the connex they can't.
i2c is used to talk to the touchscreen controller, so you might not
get what you expect if you try to use these as GPIO.

> BTUART
> STUART
> FFUART

These are the 3 serial ports. Using these lines as GPIO would require
removing some resistors on the board, since the logic-level to
RS-232-level voltage converters will be driving some of the lines.

> on the board so perhaps I could use some of them. Most of those names
> don't strike me
> as being useful for lighting my first Led. Unless I do it of a serial port

I'd probably go the AC97 stuff.

--
Dave Hylands
Vancouver, BC, Canada
http://www.DaveHylands.com/

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