Rockpi4/dev/usb-host-and-otg-switch-on-rock-pi-4
ROCK Pi 4 > Development > USB host and otg switch on ROCK Pi 4
Contents
Description
This guide describes about usb host and otg switch for the upper USB3.0 port on ROCK Pi 4.
Part one: For ROCK Pi 4A / 4A+ / 4B / 4B+ / 4C
Switch to host mode
In hardware, turn the OTG SWITCH to the L side.
Switch to otg mode
In hardware, turn the OTG SWITCH to the H side.
To use adb, please install package rockchip-adbd. See Using adb .
Part two: For ROCK Pi 4C+
On ROCK 4C+, we change mode via configuration file /boot/hw_intfc.conf.
Switch to host mode
Be default OTG port is set in host mode.
Please make sure that line "intfc:dtoverlay=rk3399-usb-otg" is commented with "#".
# Change USB3_0 node mode to otg #intfc:dtoverlay=rk3399-usb-otg
Switch to otg mode
Uncomment line "intfc:dtoverlay=rk3399-usb-otg"
# Change USB3_0 node mode to otg intfc:dtoverlay=rk3399-usb-otg
To use adb, please install package rockchip-adbd. See Using adb .