PPM SUM Bug JR/Spektrum - 1.7Prebis

[AlouetteIII]

I have previously flown my Y6 (no problems) on 1.6pre and updated it to 1.7prebis - channel/order now seems wrong and the GUI now shows pulsing interpretations of the PPM SUM signals (channels PWM signals moving with NO Tx movements) under some stick combinations such as throttle above 50% and yaw above 50% to the right (not left) - see correction to channel order for JR

I isolated it to JR/Spektrum code by using the same FrSky V8R7SP on my Futaba and commenting in the Futaba lines - all works 100% perfect on Futaba with FrSky V8R7SP.

For the JR problem - I then tried a different Rx (FrSky V8R7SP) same problem with the SUM decode

I can stop this happening by flicking my Aux 2 Ch to 1100 but then the pulsing moves to different stick combination - seems like some kind of channel allocation conflict - Alex?

[AlouetteIII]

Another Wii user is reporting a similar problem to me here http://www.youtube.com/watch?v=1Q2p2XPC3Ig these are the same kind of pulsations I am seeing.

[AlouetteIII]

I made a short video to share the 1.7 prebis BUG with other users of the PPM SUM FrSky JR/Spektrum

http://www.youtube.com/watch?v=jQcalL1jKOA

[Alexinparis]

Do you have a link where I can see the output signal wave ?

It's strange that it worked with 1.6 and not with the last dev 1.7.
nothing changed regarding the PPM recognition, except the failsafe.

[AlouetteIII]

Do you have a link where I can see the output signal wave ?

It's strange that it worked with 1.6 and not with the last dev 1.7.
nothing changed regarding the PPM recognition, except the failsafe.

Well I flew my Y6 on 1.6pre in December with the same radio - Although I never went full stick......
Sorry I don't have an output signal - you mean an oscilloscope capture? I need an excuse to buy one - this could be it.
Alex I have TODAY been able to reproduce the same error with Futaba - it's a different ch order - what I can tell you is it happens when Thro/roll/pitch/yaw and AUX1 all go to MAX pwm readings or 4 at max and 1 ch at 50% - so the PWM would be 1900/1900/1900/1900/1550 then it - jumps - like the video

Can you extend the PWM range limit to allow 5 x 1900?

[Mis]

I'm not sure, but maybe the sumator generate too short gaps bettwen frames: 8*2ms = 16ms and if frame time is 20ms, the gap is only 4ms.
The firmware want gap bigger than 5ms... This may be problem.

You may try change one line in firmware.
In line:

Code: Select all

if(diff>5000) chan = 0; 

Change the 5000 to 3000, and check it.

[AlouetteIII]

@ Alex and Mis
It works now 100% in 1.7 released today - perfect for FrSky - wow - Fantastic - !!!!!

@Mis email me your postal details to info@multiWiicopter.com - I will send you some free products - PARIS and warthox boards!!!!!!!!!!!!!! thanks

Alex - I am soooooo happy - now my FrSky works with your brilliant software for PPM SUM ! 100% perfect!

[BadBert]

is it possible that i have the same problem with my graupner mx12, hooked up to chainlink dare, with firmware 2.1??

youtube movie to explain:
http://youtu.be/mtwUxpKzKt4