I have been troubleshooting my gimbal control not functioning on channels above 8. I thought it might be a Mission Planner configuration problem but it appears it is a firmware problem and it was introduced at 3.3.0.
Pixraptor with 3.4.4 firmware Octo coaxial
No gimbal control works
Install 3.4.4 quad
Safety switch disabled (or not)
Brd_safety bitmask disabled ( or set to 32768)
All aux outputs set to PWM (6)
Gimbal setup page RCin6 tilt, RCin7 roll, RCin8 pan
RCout Tilt 6, Rcout7 roll Rcout8 pan. GImbal controls on Motor 6,Motor 7 and Motor 8
Change Rcout Tilt 9, RCout Roll 10, RCout Pan 11, switch gimbal controls to aux 1, aux2, aux3 from Motor 6, Motor 7 Motor 8.
Change Mnt_RC_IN_Tilt =9, MNT_RC_IN_Roll = 10, MNT_RC_IN_PAN =11
Load Octo coaxial firmware
Check settings remain as before, They are same settings.
Troubleshooting further I installed Quad 3.4.4 and got the gimbal working on the ch9,ch10,ch11.
I then installed Octo-quad 3.4.4. Recal'ed the Radio and nothing works.
I then restored Quad 3.4.4 and ReCl'ed the radio and everything works.
I then installed Hex 3.4.4 and reccal'ed the radio and everything works.
I then installed Octo 3.4.4 and recal'ed and nothing works.
Replaced hardware with "Pixhawk" 2.4.8
Same exact results.
Went back in firmware to 3.2.1 where it works with octo-quad. Then marched up 3.30.to 3.3.3, causes the gimbal to drive to extreme edges of its travel and freeze there. At 3.4.4 it simply sits there and there is apparently no output.
At all tests my Radio control on ch9,10,11 is being recognized by Mission Planner.
It sure appears to be a bug.