paparazzi-devel
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Paparazzi-devel] SBus confusion


From: Gautier Hattenberger
Subject: Re: [Paparazzi-devel] SBus confusion
Date: Sat, 13 Dec 2014 21:20:29 +0100
User-agent: Mozilla/5.0 (X11; Linux i686; rv:31.0) Gecko/20100101 Thunderbird/31.3.0

Of course, if you are using the SBUS output of the receiver, the internal pulses are not PPM, but for the configuration (PPM message and radio file), they are converted into usec in the range of normal PWM RC signals (~1000 to 2000).


Le 13/12/2014 19:39, Ben Laurie a écrit :
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).

_______________________________________________
Paparazzi-devel mailing list
address@hidden
https://lists.nongnu.org/mailman/listinfo/paparazzi-devel


_______________________________________________
Paparazzi-devel mailing list
address@hidden
https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
_______________________________________________
Paparazzi-devel mailing list
address@hidden
https://lists.nongnu.org/mailman/listinfo/paparazzi-devel




reply via email to

[Prev in Thread] Current Thread [Next in Thread]