Thanks for the info, it was very helpful. I have a logomatic board and
have been trying get the code running but have run into an issue
initializing the SD card. I have tried formatting with FAT16 and 32 with
one partition 1GB or less, but the efs_init function is returning -1
because the SD interface is failing to initialize. Just wondering if
there is a special way the SD card has to be formatted?
Thanks,
Jamie
On Tue, Jun 19, 2012 at 2:08 AM, Martin Mueller <address@hidden
<mailto:address@hidden>> wrote:
Hi Jamie,
the two serial ports are completely symmetrical and can both log
xbee or paparazzi frames.
The big issue with the current code is that the serial buffer only
has teh standard 128 bytes size. The (micro) SD card can take up to
400ms (200ms usually for a 2GB card) for internal processes. If more
than 128 bytes are received in that time the buffer overruns and you
lose data (think that was what Cedric saw some time ago).
We need the serial port processing to be done in interrupt code and
the SD card code to run in the normal while() loop to have it
independently.
Martin
On 06/19/2012 12:35 AM, Christophe De Wagter wrote:
The logger actually already logs both serial ports. The idea is
to use
port 1 to read the data from autopilot -> ground and the other
port for
logging the data from ground -> autopilot.
There is even code to log an extra external analog sensor I believe.
For now, the logger tries to decode paparazzi messages. So you
either
need to send your data using the paparazzi header and footer or
need to
change that bit of the logger code and do your own decoding.
Obviously
you will not be able to log the uplink telemetry anymore if you
use one
of the 2 serials for another purpose.
-Christophe
On Tue, Jun 19, 2012 at 12:09 AM, Jamie Yuen <address@hidden
<mailto:address@hidden>
<mailto:address@hidden <mailto:address@hidden>>> wrote:
Hello,
I don't have much experience with embedded programming and
have a
general question about the logomatic code. After looking
through it
a little, I am not sure how much effort would be involved in
using
the logomatic board to log data from 2 UART simultaneously. One
would be to log the paparazzi telemetry messages, and the
other to
log data from an independent onboard sensor (spectrometer).
It looks
like there is support for multiple UART interfaces, but I am not
sure about running two at once. Would this require a lot of new
development (once I understand the code)?
Thanks,
Jamie
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