ADB over USB is not working in Android

Operating system distributions Android
1

Hi,

i bought Rock PI 4A V1.4 for testing my GPU/A73 accelerated algorithms. Main target os is Android. I planned to use USB (ADB) as main communication channel, but got message:

[ 13.215681] read descriptors
[ 13.215782] read strings
[ 13.218996] dwc3 fe800000.dwc3: failed to enable ep0out

Image i used: rockpi-4b-nougat-20181221_1453_877b95b-gpt

Is there any Android image i can use where USB ADB is working fine?

thank you

2

Hello,
Did you read and follow the Radxa ADB instructions?

https://wiki.radxa.com/Rock/windows_adb

I haven’t tried these steps yet, but a hunch tells me, try a USB Male A to Male A cable if you’ve had problems with a USB A to USB C cable so far. If that doesn’t help, please be patient until the weekend is over, then you can be helped.

3

I saw this, but its does not make sense now: HostPC do not see USB connection from RockPi4 board. As i mentioned before - if you see this message dwc3 fe800000.dwc3: failed to enable ep0out - means OTG cannot start.

4

Switch the OTG switch to D mode. Boot with USB A to A cable connected. We always use adb for debugging under Android. It should work.

5

Thank you for hint, but unfortunately this is not working.

Any other way?

6

Can you burn firmware through this port?

7

IMAG0427
IMAG04273024×4032 509 KB

OTG switch to D/H mode.

When it switch to L/H mode. I got the same error message as you.

8

I tried this way. No activity. i’m using USBview to see if USB device detected in a system.

I will try this again on Monday.

9

Hello guys,

I followed this link : https://wiki.radxa.com/Rock/windows_adb
But my rock chip is not detected by the computer. I’ve installed Android TV 9
Anyone got this problem ?
Cheers,

Mathieu

10

Ok I think a reboot of my computer fixed my problem

11

In my case - it works fine now. Fault was in switch. Need to change switch before booting.