[Xastir] KISS TNC tx delays

[Curt Mills, WE7U]

On Thu, 4 Dec 2003, Matt Werner wrote:

> Up until a few days ago, I was using a serial TNC as my interface.  I switched
> to a KISS TNC, put my TNC into KISS, and off I went.  A lot of the reason was
> to eliminate a lot of the apparent delay from transmissions - for example, from
> when I hit "transmit now!" to the actual transmission.
>
> One thing I have noticed is that the delay is still there.  When xastir goes
> to transmit, the STA light on the TNC lights up, and stays lit for a few seconds
> before transmission.  I have seen a KISS TNC in operation while doing TCP/IP
> work a few years ago, and know that it normally just flashes.
>
> The TNC is a KPC-9612.  I believe it is currently running open squelch with
> software CD.  The txdelay, slottime, and persist are all the default values,
> and I changed txtail to 0.
>
> Is this a normal behavior for a KISS TNC with xastir, or should it transmit
> right away?  It causes some confusion when it relays packets as the relay is
> transmitted a few seconds after the original packet.

I just added a new slider to the Configure->Timing dialog for
setting the inter-character delay for serial ports.  You can set it
from 0 to 50ms.  Test it out and see if that fixes your problem.
The hard-coded setting was 25ms, in order to allow a picopacket to
work.

It's on the developer's CVS server now.  Sometime in the next few
hours (or a few days?) it'll show up on the anon CVS server.

-- 
Curt Mills, WE7U                    hacker_NO_SPAM_ at tc.fluke.com
Senior Methods Engineer/SysAdmin
"Lotto:    A tax on people who are bad at math!"
"Windows:  Microsoft's tax on computer illiterates!" -- WE7U
"The world DOES revolve around me:  I picked the coordinate system!"