Rock3/dev/usb-install
Install on eMMC from USB port
ROCK 3 supports maskrom mode, which is a special running mode the CPU is waiting for command from USB OTG port.
The PC tool we use to communicate with ROCK 3 in maskrom mode is rkdevelop tool, an open source tool by Rockchip.
This page describes how to download and install the image on eMMC and boot on ROCK 3.