JHEMCU F745 AIO target with MSP functionality.

[DutchFPV]

Vendor/Model

• Please provide the target name. e.g. JHEF745
• Please provide vendor and model of the FC. -JHEMCU F745 AIO- GHF745AIO
• Please provide a link to the vendor specifications.
  https://www.jhemcu.com/e_productshow/?66-GHF745AIO-40A-66.html

CLI dump or Unified Target

• Please provide a CLI dump of DEFAULTS or link to unified target.
  https://github.com/betaflight/unified-targets/blob/master/configs/default/JHEF-JHEF745.config

Hoping to get this with MSP functionality for use with HDZero. Not sure if that has all been merged yet or not.

[nerdCopter]

here you go, i had to remove motor 7 and 8 for it to compile.
EmuFlight_0.4.3_JHEF745_Build_94e9f5a2a.hex.zip

please test and feedback. i'm okay with merging without motor 7 and 8 because they are no associated timers defined for them in BF.

you have to use latest configurator here: https://github.com/emuflight/dev-master/releases/tag/20240501.162228-cfg

[DutchFPV]

Thank you!  Its for a friend but I'll def confirm working and forward any feedback he has.

[DutchFPV]

Got the following feedback from my friend after testing:
-Vtx control not working (vtx always switches to R1, not controllable through elrs vtxadmin)
-Sometimes a motor won't spin when armed normally, and when trying to spin individual motors (either through emu config or using turtle mode switch) a motor often won't spin, then that esc reboots.

Let me know if you need any further info. Thanks!

[nerdCopter]

Sorry, but the MSP-Display-port is bare-minimum, there is no VTX-Backpack/ VTX-Admin support.

as for the motors, i have no clue, sounds more like a hardware problem considering the reboot. or a DMA problem if only a motor spin problem.
Could try set dshot_burst = OFF, but i dont know.

[DutchFPV]

Ok reviving this after some further testing. We've established that the BF 4.4 target works with defaults applied. Upon further review it looks like the defaults file I gave you changed since BF 4.2. Here is a CLI dump from tested-working BF 4.4 target with custom defaults applied. Can we give this a try? Let me know if you need any more info
btfl_cli_jhef745_440.txt.pdf

(BTW, we changed the file extension to .pdf to trick Facebook. But this will open normally as a text file.)

[nerdCopter]

there is a v1 and a v2, do you know which id proper for the hardware?
JHEF745 JHEF745V2

[nerdCopter]

here is JHEF745V2 minus motor 7 and 8 which did not have timers defined.
EmuFlight_0.4.3_JHEF745V2_Build_0f9c0f77a.hex.zip

[DutchFPV]

The BF target he's using is for V1. Sorry. Can we give that one a try?

[nerdCopter]

i reviewed your .txt side-by-side, i see no differences to what is in master https://github.com/emuflight/EmuFlight/tree/master/src/main/target/JHEF745 🤷‍♂️

[DutchFPV]

So you're saying what's in the BF dump matches the Emu master? That's what I was trying to confirm. Emu gave odd motor behavior and desyncs but the drone flew fine on BF. Guess it could have been a flash error or something else. Will try again with the master from the configurator and confirm. Thanks.

[nerdCopter]

i suppose you could get timers and dma from emu and we can re-compare. otherwise the all the pins are identical with exception that motor 7 and 8 are removed in Emu because the timers were never defined by manufacturer.

Since Emu does not have RPM filters, may need static ESC timing and higher demag compensation.

[nerdCopter]

for what it's worth BF devs and community have noted JHEMCU as typically low quality.

[DutchFPV]

We'll see what happens with another test. If it still has issues I'll dump timers and dma. Thanks!

[DutchFPV]

So same thing. In motors tab all motors spin together, but motors 3 and 4 desync if you try to spin them individually. These same motors are giving erratic behavior in flight. I think I found dma, but how can I query timers? I'll upload both for you.

[nerdCopter]

dang, looks like Emu does not have the timers command :( 🤕

[nerdCopter]

can try set dshot_burst = ON|OFF , but probably no help. not sure where to go from here.

[DutchFPV]

Just a final update that this target is fully operational. Dshot burst was off by default. Turned it on and everything works great. HDzero support seems pretty solid too.

[nerdCopter]

thanks, i merged the fix and updated the .hex in releases.