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[aprssig] D700-external PIC processing

Wes Johnston, AI4PX wes at kd4rdb.com
Mon Feb 12 23:52:11 UTC 2007


one caveat I discovered when implementing smart beaconing via the serial
port.... anytime you send a command via the serial port, it will "snatch"
the display from you.  For example, you are entering a message using the
DMTF keypad and a command gets send over serial port, the message will
simply exit and you loose what you were doing.  It's pretty darned
frustrating, so much so that I abandoned smart beaconing for the d700.  Now,
simply catching data from the serial port with a external processor,
manipulating it and sending to the GPS would be ok... but trying to set
frequecy on the display _will_ interrupt the user if he's doing something...
and I could not find a way to let the external processor know that you were
using the display to hold off sending data.....

Wes


On 2/12/07, william.diaz at comcast.net <william.diaz at comcast.net> wrote:
>
> Wes,
>  See below:
>
>  -------------- Original message ----------------------
> From: "Wes Johnston, AI4PX" <wes at kd4rdb.com>
> > You know we don't have to query the d700 all the time.... AI 1 <cr> will
> > cause it to spit loads of serial data out as it's happening.
>
>  The data on the DB9 serial port also seems to include data similar to
> what could be used to control the D7/D700 display.  Wouldn't be surprised to
> learn it is the same data sent to the display.  It apparently includes data
> to indicate when the A or B side squelch opens or closes (CT 0,1 etc)  and
> may include info to control how many bars of the signal strength should be
> displayed when the squelch is open.  When you transmit, it sends what I
> think is the receive frequency, offset and other unknown parameters.  Need
> to investigate these display commands or operation reports in more detail.
>
> If you wanted to use the LIST n position data from the DB9 serial port to
> create Waypoints with APRS icons using the Garmin Protocol, you would have
> to find a way to route this from the DB9 serial port to the D7/D700 GPS
> serial port.   It may be possible to do this by wiring the output of the PIC
> or ARM etc device to the GPS serial input.  The GPS would still send
> Position data to the D7/D700 GPS port, but would receive Waypoint data from
> the "PIC" port.
>
> An external application on a desktop or laptop could also create the
> waypoints/icons using Garmin protocol and use an external device to route
> the data to the Garmin GPS in a somewhat similar manner.  May need to ensure
> that only waypoint data is routed to the GPS input.
>
> Bill KC9XG
>
>
> > Wes
> >
> >
> > On 2/12/07, Curt, WE7U <archer at eskimo.com> wrote:
> > >
> > > On Sun, 11 Feb 2007, Dennis Hudson wrote:
> > >
> > > > Would be cool to have this parser in programs like xastir as well.
> > > > You could simply open your laptop and use it for a display device
> > > > when and if wanted. Open and close the program as will without
> > > > interfering with the features you are used to on the D700's head.
> > > > When you want a full blown xastir station just switch to your TNC
> > > > profile on the D700.
> > >
> > > When the complete protocol is figured out and documented, let me
> > > know.  I'll see about adding it.  Another possibility would be to
> > > write a shim program that listened to the D700 on a serial port and
> > > produced APRS packets on a PTY port that Xastir could connect to.
> > > Then Xastir itself wouldn't have to change at all to receive and
> > > decode the data.
> > >
> > > --
> > > Curt, WE7U.   APRS Client Comparisons: http://www.eskimo.com/~archer
> > > "Lotto:    A tax on people who are bad at math." -- unknown
> > > "Windows:  Microsoft's tax on computer illiterates." -- WE7U
> > > "The world DOES revolve around me:  I picked the coordinate system!"
> > >
> > > _______________________________________________
> > > aprssig mailing list
> > > aprssig at lists.tapr.org
> > > https://lists.tapr.org/cgi-bin/mailman/listinfo/aprssig
> > >
> > >
> >
> >
> > --
> > In theory there is no difference between practice and theory.
>
>
>
>
> ---------- Forwarded message ----------
> From: "Wes Johnston, AI4PX" <wes at kd4rdb.com>
> To: "Curt Mills, WE7U" <archer at eskimo.com>, "TAPR APRS Mailing List" <
> aprssig at lists.tapr.org>
> Date: Mon, 12 Feb 2007 16:25:02 +0000
> Subject: Re: [aprssig] D700-external PIC processing
> You know we don't have to query the d700 all the time.... AI 1 <cr> will
> cause it to spit loads of serial data out as it's happening.
>
> Wes
>
>
> On 2/12/07, Curt, WE7U <archer at eskimo.com> wrote:
> >
> > On Sun, 11 Feb 2007, Dennis Hudson wrote:
> >
> > > Would be cool to have this parser in programs like xastir as well.
> > > You could simply open your laptop and use it for a display device
> > > when and if wanted. Open and close the program as will without
> > > interfering with the features you are used to on the D700's head.
> > > When you want a full blown xastir station just switch to your TNC
> > > profile on the D700.
> >
> > When the complete protocol is figured out and documented, let me
> > know.  I'll see about adding it.  Another possibility would be to
> > write a shim program that listened to the D700 on a serial port and
> > produced APRS packets on a PTY port that Xastir could connect to.
> > Then Xastir itself wouldn't have to change at all to receive and
> > decode the data.
> >
> > --
> > Curt, WE7U.   APRS Client Comparisons: http://www.eskimo.com/~archer
> > "Lotto:    A tax on people who are bad at math." -- unknown
> > "Windows:  Microsoft's tax on computer illiterates." -- WE7U
> > "The world DOES revolve around me:  I picked the coordinate system!"
> >
> > _______________________________________________
> > aprssig mailing list
> > aprssig at lists.tapr.org
> > https://lists.tapr.org/cgi-bin/mailman/listinfo/aprssig
> >
> >
>
>
> --
> In theory there is no difference between practice and theory.
> _______________________________________________
> aprssig mailing list
> aprssig at lists.tapr.org
> https://lists.tapr.org/cgi-bin/mailman/listinfo/aprssig
>
> _______________________________________________
> aprssig mailing list
> aprssig at lists.tapr.org
> https://lists.tapr.org/cgi-bin/mailman/listinfo/aprssig
>
>


-- 
In theory there is no difference between practice and theory.
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