Power supply by port 'power 1', then USB port can't used?

[keguo1119]

I wan't download the log from USB port use mavros, the pixhawk is powered by port 'power 1'. But I find the USB can't used? Does this can be solved ?

[julianoes]

This should be possible. What is the error that you're seeing?

Can you try to power by USB first?

[julianoes]

This could be the same problem as #12201.

[mcsauder]

@keguo1119 , if you have a chance to test with PR #12428, it might fix your issue. Please let us know if it does.

[keguo1119]

@mcsauder ， I have merge the mcsauder:mavlink_config_stream_bugfix_master into current master branch, and test the firmware on pixhawk on fmu-v3. It works fine.

And now my new question is do we just need merge the mavlink_main.h mavlink_main.cpp file into the old version 1.8.2, or some other files also need to be change to fix the bug on the old version(like 1.8.2)?

[keguo1119]

@mcsauder, could you point out how to fix the bug, base on version 1.8.2? It's easy to merge the master branch into our current version, but the testing will spend a lot of time.

[mcsauder]

@keguo1119 , It appears you can backport the same fix to v1.8.2. I haven't bench tested it, but here is your example: https://github.com/mcsauder/Firmware/tree/v1.8.2_mavlink_config . If this works for you let us know and we can close out this issue when #12428 gets merged.

[keguo1119]

@mcsauder , I have modify our own version base on the example, it works fine. Thank you very much.

Otherwise , the key changes is the two functions below, is that right?

[mcsauder]

That is correct. Just cut/paste code to create those two methods and allow them to be called from task_main() rather than at the constructor. Glad to hear that worked for you!

[keguo1119]

@mkschreder

It says set CBRK_USB_CHK to 197848 has some risk. what's the potential risk if I disable the the USB connected checks in the commander. (If not the UAV can't take off)

[mcsauder]

@keguo1119 , the risk is if the USB link is disconnected during flight it will reboot the autopilot.

@dagar , we can close out this issue once #12428 is merged.

[keguo1119]

Can we solve this risk in software aspect? I will try to solve this by supply the USB power from the power port!!

[mcsauder]

Hi @keguo1119 , as luck would have it, #9664 was just merged in, so I think everything should be working to meet your needs. Can we close out this PR now that #12428 is merged as well?

[keguo1119]

Yes，this issue can be closed!

[stale]

This issue has been automatically marked as stale because it has not had recent activity. Thank you for your contributions.