OK3588 5.10.66 Buildroot Communication via USB Virtual Network Adapter

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Revision History

Date	Version	Revision History
11/03/2025	V1.0	Initial Version

Communication via USB Virtual Network Adapter

Functional adaptation is based on OK3562 5.10.198 Build root R2 image and OK3588 5.10.66 Build root R5 image.

1. Source Code Modification

OK3588: No device‑tree changes are needed. Simply enable the same options in menuconfig.

2. Commands

# 3562 master-slave mode switching command of USB interface
cat /sys/kernel/debug/usb/fe500000.usb/mode
echo host > /sys/kernel/debug/usb/fe500000.usb/mode
echo device > /sys/kernel/debug/usb/fe500000.usb/mode

#3588 master-slave mode switching command of typec0 interface
cat /sys/kernel/debug/usb/fc000000.usb/mode
#3588 master-slave mode switching command of typec1 interface
cat /sys/kernel/debug/usb/fc400000.usb/mode

Use the above commands to view the current USB mode (host/device).

In device mode, a virtual NIC usb0 is generated for recognition by host devices.

In host mode, the USB interface detects the virtual NIC of another board and creates a usb0 node for communication.

Note: Communication requires one device in host mode and the other in device mode.

Switch with the above two commands

OK3588 has two Type‑C ports: typec0 and typec1. typec0 operates in Device mode only, while typec1 operates in Host mode only. When switching modes, be mindful of hardware connections.

typec0 address: sys/kernel/debug/usb/fc000000.usb/mode

typec1 address: sys/kernel/debug/usb/fc400000.usb/mode

3. Testing Steps

3.1 OK3588 as Host, RK3562 as Device

Usb0 is the node generated by typec0 as the device, and usb1 is the node detected by typec1 connected to 3562. Therefore, in this test, usb1 is selected for the ping connectivity test.

On 3588:

On 3562:

3.2 OK3588 as Device, RK3562 as Host

On 3588:

On 3562: