Stablized mode switch no longer working in Multi Channel Mode selection

PX4 Autopilot Configuration & Flight Modes ⚙️
1

Hi,
On updating to v1.7.2 stable from v1.0.1, for fixed wing, the radio switch I assigned to enter stabilized mode no longer works. Previously, I used a 3 position switch (ch6) to switch between manual, altitude and mission modes. I had an additional 2 position switch to switch to stabilized mode.

Now the only way I can get stabilized mode to work is to use the Single Channel Mode selection and set the 3 position switch to e.g. manual, stabilized and altitude.

Also, for some reason using multi channel mode to set the stabilize switch to ch8 sets the RC_MAP_ACRO_SW param to ch8.
Manually setting the RC_MAP_STAB_SW param to ch8 does not fix the problem.

Also when I try to configure the flight modes via the Multi Channel Mode selection, the trim on (at least) my flap channel (ch5) is way out compared to when I use the Single Channel Mode selection.

Any clues as to what is going on would be greatly appreciated.

Thanks,
Kit

2

Lots of changes since v1.0.1. You’ll need to go through a complete calibration and setup. You may find yourself having to adjust the weights of your switches to match correctly. Check out the latest User Guide.

Good luck.

3

Yes thanks for the info.
I have re-setup and recalibrated everything multiple times. E.g. my air-frame had been based on the SkyWalker which has been removed so I switched to Standard Plane with a custom mix file on the card, which works ok.

I am wondering if the multi-channel mode flight mode configuration works for anyone in v1.7.2 stable?

I spent a day trying to diagnose what was wrong, including sprinkling debug statements through
set_main_state_rc() in commander.cpp. It seems that whatever (spare) channels I choose for the mode switch and other switches such as stab or acro, set_main_state_rc() only gets called if the mode switch changes and never gets called when a subsidiary channel changes.

I guess I could continue digging deeper and diagnose rc_update.cpp, but it is summer here and I would rather be flying than debugging,
Therefore I gave up, and just switched to single channel flight mode and used my transmitter to mix a 3 position switch with a 2 position switch to get 6 positions on a single channel.