Add Mount RC failsafe handling

[peterbarker]

@Hwurzburg

[peterbarker]

Maybe s/in_rc_failsafe/in_failsafe/

[Hwurzburg]

want me to SITL and bench test this? and close mine?

[peterbarker]

want me to SITL and bench test this? and close mine?

Yes please!

[peterbarker]

On Fri, 8 Jan 2021, Pierre Kancir wrote:

looks like we can merge the two cases

Read a little harder. They look very similar :-)

[peterbarker]

On Fri, 8 Jan 2021, Pierre Kancir wrote:

looks like is miss some indent here

Yeah, I retained the original indent for no particularly good reason.

[khancyr]

One word : dyslexia ;-S

[peterbarker]

I tried the pure-virtual thing. It didn't work out. Too much stuff to be reverted when we move the failsafe handling up.

[Hwurzburg]

@peterbarker having a problem running SITL on this...if I use master/realfight griffin to get the mount, setting SIM_RC_FAIL puts it into failsafe...if I load this, it just disconnects RC from the controller box...maybe its a flightaxis thing...but cant test in STIL as is

[Hwurzburg]

btw, noticed that if I use RC mavproxy command it overrides the flight axis control box for that channel until I set RC X 0....probably should document...I assume it also does this in pure Mavproxy if joystick module is used?

[peterbarker]

Closes https://github.com/ArduPilot/ardupilot/issues/24093

[rmackay9]

We decided to use an option bit instead of adding the extra parameter, thanks!