Re: [Paparazzi-devel] Logomatic with 2 UART?

[Martin Mueller]

Hi Jamie,

unfortunately not, currently the code only supports non-SDHC cards (means <= 
2GB).

Martin 

Jamie Yuen <address@hidden> schrieb:

>Hi,
>
>No - it is actually a 4GB card that I was making a <2GB partition on (don't
>have a 2GB card right now). Will this not work?
>
>Thanks,
>Jamie
>
>On Thu, Jun 21, 2012 at 3:32 AM, Martin Mueller <address@hidden> wrote:
>
>> Hi Jamie,
>>
>> have you tried without any partition table?
>>
>> Martin
>>
>>
>> On 06/21/2012 12:35 AM, Jamie Yuen wrote:
>>
>>> 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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