Re: [Paparazzi-devel] Spektrum Satellite dropping connection

[antoine drouin]

Hi Marko

When this happens, you can run gdb over jtag and see where you
processor is stuck. I assume you're running the rotorcraft autopilot (
formerly booz).

Regards

Poine

On Mon, Aug 30, 2010 at 2:02 PM, Marko Thaler <address@hidden> wrote:
> Hi Eric,
> I have bind my satellite receiver on Lisa and now everything works great!
> The code is so well commented it is a joy to examine. Thank you for your
> excellent work!
> Now that all the RC stuff is working I have encountered a new problem that I
> still do not know what is causing it. Lisa just randomly freezes without a
> warning when autopilot code is running. This has happened on several
> occasions, anytime from 50 seconds to 18 minutes after start up. At the
> moment I am still not able to predictably reproduce the error.
> I will try to collect as much data as possible and post any conclusions on
> the mailing list.
> Best regards to Australia,
> Marko
>
> On Sun, Aug 29, 2010 at 10:15 AM, Eric Parsonage <address@hidden>
> wrote:
>>
>> Marko
>>
>> Hi Eric,
>> Now everything makes perfect sense! Your response cleared a lot of fog in
>> my head in connection to the new Spektrum parser. I will take a look at the
>> code myself to get a solid understanding of the whole protocol.
>>
>> I have commented the code quite a lot so that it is easier to understand
>> the protocol. I did a lot of testing and decided to bind as a 9/12 channel
>> so that the best features of a transmitter are used. like 11bit rather than
>> 10 bit resolution etc. If you had been using a 7 channel transmitter you
>> would not have noticed the problem at all. The problem is that my code
>> recognises that your channel data should come in two frames because it is a
>> 9 channel transmitter but because you bound to a 7 channel receiver you only
>> sent one frame (with a different protocol in which the first byte actually
>> has almost the opposite meaning signal strength rather than frames lost).
>> This lead to channel 0 being overwritten. Bind on Lisa and your life will be
>> easy :)
>>
>> I will test everything as soon as I get back home (tomorrow) and let you
>> know about the results.
>> Thank you so much for clearing the whole thing up. I really appreciate it!
>> Kind regards,
>> Marko
>>
>> PS: Are you located in America or have you been working on my problem till
>> 5AM? In either case a thank you beer won't be enough! :-)
>>
>> I am in Australia :)
>> Eric
>
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