Rockpi4/dev/usb-host-and-otg-switch-on-rock-pi-4 - Radxa Wiki

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    ROCK Pi 4 >  Development >  USB host and otg switch on ROCK Pi 4

Contents

1 Description
- 1.1 Part one: For ROCK Pi 4A / 4A+ / 4B / 4B+ / 4C
  - 1.1.1 Switch to host mode
  - 1.1.2 Switch to otg mode
- 1.2 Part two: For ROCK Pi 4C+
  - 1.2.1 Switch to host mode
  - 1.2.2 Switch to otg mode

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.

# apt install -y rockchip-adbd

Part two: For ROCK Pi 4C+

Switch to host mode

Force host mode

# echo host > /sys/devices/platform/usb0/dwc3_mode

Switch to otg mode

Force otg mode

# echo otg > /sys/devices/platform/usb0/dwc3_mode

To use adb, please install package rockchip-adbd.

# apt install -y rockchip-adbd

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