Re: [Paparazzi-devel] SBus confusion

[Ben Laurie]

On 13 December 2014 at 16:07, Gautier Hattenberger
<address@hidden> wrote:
> Hi,
>
> The min and max in the radio file are chosen so that you have a positive
> command right/up at the end. So they can be inverted from the actual min and
> max ppm value depending on your RC (on any other system you would have a
> inverse="true" attribute, but we have been lazy on this...).
> If you don't reach the max command (+/- 9600) it probably means that the min
> and max are too high.
> You can look at the PPM message to yet the correct values for your
> transmitter.

That's what I did, though for SBus this is all a bit odd, because it
doesn't really send PPM. Anyway, adjusting the radio file to the
"observed" PPMs did as expected - not sure about the roll and pitch
yet, I guess that'll become apparent when I put some props on!

>
> Gautier
>
> Le 13/12/2014 16:33, Ben Laurie a écrit :
>>
>> Running master as of today.
>>
>> Firstly, I'm seeing roll and pitch reversed if I look at RC telemetry
>> (i.e. fully right/forward is negative, left/backward is positive), but
>> webpages/videos seem to suggest I shouldn't.
>>
>> However, conf/radios/cockpitSX.xml seems to expect them backwards
>> (i.e. roll/pitch min and max are reversed compared to throttle/yaw).
>>
>> Not sure what's going on here?
>>
>> Secondly, max/min values I see are in the range -8900, +8900 (0, 9100
>> for throttle). This is a fair amount less than the +/- 9600 I think I
>> should be expecting. What do I do about this?
>>
>> (Radio control is a FrSky X9D, btw).
>>
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>
>
>
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