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Re: [Paparazzi-devel] SBus confusion

From: Gautier Hattenberger
Subject: Re: [Paparazzi-devel] SBus confusion
Date: Sat, 13 Dec 2014 17:07:25 +0100
User-agent: Mozilla/5.0 (X11; Linux i686; rv:31.0) Gecko/20100101 Thunderbird/31.3.0


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.


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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