Re: [Paparazzi-devel] SD log with Apogee board

[David Conger]

That is great news!! Another new feature added.
I see Paparazzi Project never sits idle even after more than 10 years work.
Thank you very much Gautier and the whole ENAC team.

On Mon, Jan 27, 2014 at 2:26 AM, Gautier Hattenberger
<address@hidden> wrote:
> Dear Paparazzi users,
>
> Since last week, a new feature is available in the latest master for Apogee
> boards' users (https://wiki.paparazziuav.org/wiki/Apogee/v1.00). It allows
> to log data on the embedded SD card at high rate and without any additional
> boards.
>
> In order to do this safely for the autopilot, we have used the real-time
> scheduler of ChibiOS with a thread for the current autopilot code and an
> other one for data logging. This is NOT a RTOS paparazzi version (which is
> under development in the paparazzi_rt branch, also using ChibiOS), but just
> the possibility to have a safe data logging.
>
> The API is still pretty basic, and is likely to be improved in future
> paparazzi versions. It allows to manually write ascii data (same way as
> printf) or binary data (buffer+size or single byte). See
> sw/airborne/subsystems/chibios-libopencm3/sdLog.h file.
>
> An example can be found in gps_ubx.c file where the raw GPS data are logged.
> The application for this was to perform trajectory post-processing using a
> LEA6-T module and RTKLIB (which actually works, but required a very good
> quality antenna in order to achieve best results).
>
> Cheers,
>
> Gautier for Paparazzi/Enac team
>
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