Re: [Gumstix-users] Tweener redesign?

[Dave H. <dhy...@gm...>]

Hi Sean,

On 4/29/05, Sean Luke <se...@cs...> wrote:
> We're very excited about the upcoming Robostix, but one concern is its
> apparent lack of a serial port.  I have been told that it may be usable
> with the 'tweener' board, though it's not clear from the pictures
> whether or not the tweener will interfere with the RoboStix's region
> for plugging in servos, etc.  Furthermore, this picture
>         http://gumstix.com/gallery/gall_tweener.html
> ...suggests that the Tweener + Gumstix may actually be 6 inches long!

The tweener will work with the robostix + gumstix, but not with the
etherstix. The servo connections/I/O connections on the robostix will
be along the same edge as the serial ports on the waysmall.

> Any ideas?  Further, are there ttl-level serial ports available on the
> RoboStix if not RS232 ones?  We could certainly one or two four-pin ttl
> ports that a level shifter like this
>         http://acroname.com/robotics/parts/S13-SERIAL-INT-CONN.html
> ...could be plugged straight into.

There are 3 TTL level serial ports, one from the gumstix, and two from
the ATMega128.  The pinout that the serial ports have is slightly
different from the the Acroname interface. It has the same pinout as
this one:
http://www.hvwtech.com/pages/products_view.asp?ProductID=3D168

Using the extender cable from Acroname and rewiring it (you can remove
the wires from the connector and move them around) would work.

--=20
Dave Hylands
Vancouver, BC, Canada
http://www.DaveHylands.com/