[aprssig] HamHUD II Kit Group Buy In Progress

Stephen - K1LNX k1lnx at k1lnx.net
Sun Jun 10 15:37:25 EDT 2007

Sounds good! This will be a perfect marriage for the TNC-X (I have two of
them and I LOVE them)

When will the upgraded chips be available?


On 6/10/07, Jason Rausch <jason at ke4nyv.com> wrote:
> --- Stephen - K1LNX <k1lnx at k1lnx.net> wrote:
> > Are existing Hamhud II's able to be upgraded to
> > include KISS support?
> Yes.
> > Was this just a firmware change?
> Yes and no.  You will be able to upgrade by purchasing
> a PIC18F2525 processor.  This is a pin for pin drop in
> replacement of the current PIC18F252.  The only
> difference is, the 2525 has more on-board RAM and
> program space.  This is what we needed to have enough
> buffering for the KISS function.
> Also, since we have more buffering space, we do not
> have to worry about using the RTS line to hold-off the
> TNC and cause the HamHUD to "choke" on packets comming
> in too fast.  For this reason, we are able to re-use
> the RTS line for waypoint output to a mapping GPS.
> Better known as the "Anti-Tracker" function.  Since
> this line was already ran through the on-board MAX202,
> the end user can simply disconnect this line from the
> RTS line of the TNC and re-wire it to the receive pin
> of their GPS.  If you have one of my Breakout Boards
> (http://www.rpc-electronics.com/hhacc.php) you can
> simply re-jump the serial jumper setting to the WP
> side of the three pin header.  This re-routes this
> line to pin three of the GPS port.
> Jason KE4NYV - HamHUD Development Team
> _______________________________________________
> aprssig mailing list
> aprssig at lists.tapr.org
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Stephen Brown - ARS K1LNX
Johnson City, TN EM86uh
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