- cmake NuttX build wrapper compile in place instead of copying source tree to build directory
- slightly faster skipping necessary copying (depending on system)
- allows debugging in place
- easier to work directly in NuttX following official documentation
- simplifies overall build which should make it easier to resolve any remaining NuttX dependency issues in the build system
- the downside is switching back and forth between different builds always require rebuilding NuttX, but I think this is worth the improved developer experience
- also no longer builds px4io and bootloader in every single build, for most users these rarely change and we're wasting a lot of build time
- no longer start sercon or mavlink usb by default
- on USB connection (VBUS) monitor serial USB at low rate and start Mavlink if there's a HEARTBEAT or nshterm on 3 consecutive carriage returns
- the mavlink USB instance is automatically stopped and serdis executed if USB is disconnected
- skipping Mavlink USB (and sercon) saves a considerable amount of memory on older boards
Without reverting this a constant boot loop occurs.
Prior to merging, why this occurs on some F7 boards and not this one should be looked at.
With LazyFPU enabled, v1.12.0 beta1 will not boot but without it removed it works fine.
This fixes RSSI for the Control Zero F7 but I have noticed that while this works perfectly for SBUS receivers, for PPM receivers it does not decrease the RSSI visual value in QGC when removing the RC transmitter connection.
When a PPM receiver is connected and the connection is lost the autopilot goes into RC Scan Mode (in the RC Update Module) to determine what is connected (even though something already is connected).
The main issue with this is that PPM receivers don't go into RC Failsafe but I don't think it is an issue with this autopilot. It looks to be an issue with the RC Update Module and how it is handled at the module level for non I/O coprocessor autopilots.
Tested with an X8R (SBUS) and a Dragonlink (PPM) as well as a Dragonlink set to SBUS as the output. SBUS worked as intended. See screenshots below.
David Sidrane
Beat Küng
Daniel Agar
bresch
Peter van der Perk
echoG
Ryan Johnston