Here is a guide for setting up 6 flight modes on 1 channel of a JR XG8 eight channel DMSS RC transmitter. This is achieved while only using one of the active channel inputs (the Flap/Aux1 channel) & the Mixing switch (2 position). The result is the Gear (RX ch5), Aux2 and Aux3 channels are free for other purposes.
The Flap switch on the transmitter must be reassigned from the default right side lever (FLAP LV) to Flap switch (FLAP SW, 3-position) on the left shoulder. The mixing switch (Mix SW 2, position) on the left shoulder provides the cut over to the other three modes. By setting the mix function to Flap-> Flap it can be done without losing the Gear (RX ch5), aux 2, aux3 channels.
Here are the settings:
This will give you six positions for pulse widths corresponding to six flight modes. With the Mix switch off (backward) you get flight modes 0,2,4 on the flap switch, and with the mix switch on (forward) you get flight modes 1,3,5.
I had the same problem with my JR XG8. I think the code might have been changed since Stephen wrote this instruction set. I made some changes that got me all 6 channels. Also in this manual he uses channel 6 for mode selection but the pixhawk mode selection uses channel 5. I had to interchange channel 5 and 6 when connecting the ppm encoder to my Rx (Don't think you can program the Flap Sys output that Stephen mentioned to the channel 5).
I fly mode 2 on my transmitter and had to connect the cables from the ppm encoder to the RG831B receiver in the following order:
Rx throttle to ppm channel 3
Rx aile to ppm channel 1
Rx elev to ppm channel 2
Rx rudd to ppm channel 4
Rx gear to ppm channel 6
Rx aux1 to ppm channel 5
Rx aux2 to ppm channel 7
Rx aux3 to ppm channel 8
Here is the setup I used to get the 6 channels among other changes i made from Stephen's setup (Correction I made to Stephen's instruction are bold and underlined):
Hope this helps anyone else planning to go with JR XG8s on the quad. If you still don't get all 6 channels, just readjust the "Function List > FLAP System > Set" Norm, Mid and Land values until they match the ranges shown in the Mission Planner or APMPlanner2 Flight Mode setup page. Also make sure that you are transmitting your mode selection channel from the XG8 to the Pixhawk channel 5.
I would also like to thank Stephen for the instructions since it helped me a lot with my setup.
Change the FLAP Norm, FLAP Mid and FLAP Land in the FLAP Systems around until you get the right values. I suggest starting with the FLAP Mid. That got me the 6 channels.
Might not be shown as rate but should have the values in the Program Mix 1 setup.