RE: [Gumstix-users] robostix questions

[John A. <jal...@sp...>]

Thanks, Dave for the reply.  What exactly is a "via" and how big is it.
Also, is there a data sheet for the tweener?  I couldn't find anything on
the schematics wiki page.  Thanks again.

Respectfully,

John Alfredo

-----Original Message-----
From:	gum...@li...
[mailto:gum...@li...] On Behalf Of Dave Hyla=
nds
Sent:	Thursday, June 30, 2005 12:27 PM
To:	gum...@li...
Subject:	Re: [Gumstix-users] robostix questions

Hi John,

> I have a 200MHz Bluetooth waysmall and have been patiently waiting for =
the
> robostix to be released in hopes that I could use it for my robotics
> project.  I need to have physical access to the PWM, LCD, IR, and BTUAR=
T
> signals.  My plans are to control two motors, display a user interface =
on
a
> small LCD panel, and provide input initially thru an ordinary TV remote
(via
> IR), and eventually via a bluetooth device.
>
> Since I have no PCB fabrication resources I am unable to take advantage=
 of
> the miniature hirose connectors or any onboard pads sized for a miniatu=
re
> connector for access to signals.  Is there any combination of boards wh=
ich
> would give me fullsize PWM, LCD, IR, and BTUART access via pins or thru
> holes?  Thanks in advance for your help.

I'll answer what I know.

Currently, the RoboStix "borrows" some of the LCD lines to provide
various control features (like controlling the voltage regulators, the
RESET line, etc), so you'll have some troubles there. I took a quick
look at the schematic and these are the 4 lines lines are used:

L_DD11 - IRQ to allow RoboStix to interrupt gumstix.
L_DD12 - Enable for voltage regulators
L_DD14 - Enable for 245 voltage converters
L_DD15 - Reset line to ATMega 128

The one board that gives access to ALL of the hirose signals through
vias is the Tweener board. There is a via for each signal, since they
all have to go from the top side to the bottom side of the board.

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


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