RE: [Paparazzi-devel] GCS Receiving

[pascal . brisset]

Quoting Brendan Chen <address@hidden>:

> Hi Roman,
>
> Thanks for the reply. The bit I don't understand is that after I put in the
> lines in the message.xml (code below), how will the GCS know when to use that
> format and how would I have this data displayed on the screen?

 All the messages are displayed by the Messages agent.

> Another thing is that I can't find an 'autopilot' dir from inside the 'sw'
> dir, and I had a look for downlink.h, although there are few files at various
> locations, they still look reasonably same. I'm not sure which one to use?

 From your declaration in the messages.xml file, a macro is generated (from the
"make" command in the paparazzi3/ directory) in the var/include/messages.h :

DOWNLINK_SEND_AirspeedData(...) ...

 You can call it anywhere from the airborne C code. Warning, the macro expects
pointers to the data; so the call will look like

    DOWNLINK_SEND_AirspeedData(&as_1, &as_2)

--Pascal



>
>
> Thanks
> Kind Regards,
> Brendan
>
> ________________________________________
> From: address@hidden
> address@hidden On Behalf Of
> Roman Krashanitsa address@hidden
> Sent: Thursday, 25 September 2008 10:56 AM
> To: address@hidden
> Subject: Re: [Paparazzi-devel] GCS Receiving
>
> Hey Brendan,
>
> The whole paparazzi system is based on sending numbers through uart
> from the autopilot, receiving them on the ground station again through
> the uart. You may start looking at /conf/messages.xml and
> /sw/autopilot/downlink.h.
>
> The point is, you configure what messages you will have in your system
> by specifying format for each in messages.xml, then write a wrapper
> function for each and put them into downlink.h, and call them either
> automatically at certain periods, or in the code whenever you need to
> transfer something. This task requires knowledge of C though.
>
> Sincerely,
>
> Roman
>
>
>
> 2008/9/24 Brendan Chen <address@hidden>:
> > Hi Guys,
> >
> > I'm trying to send some binary (or preferred decimal) number through the
> downlink UART. At the other end (the ground station) I would like to collect
> those data that I sent from the platform and display it somewhere on the GCS,
> any where is fine.
> >
> > Now my problem is I don't know how to send it, which functions I can use to
> send it from the platform and how I can collect the packages and display it.
> >
> > Can anyone help me with this problem please?
> >
> >
> > Thanks.
> > Brendan
> >
> >
> > _______________________________________________
> > Paparazzi-devel mailing list
> > address@hidden
> > http://lists.nongnu.org/mailman/listinfo/paparazzi-devel
> >
>
>
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