ROCK Pi 4 > Development > Install from USB OTG port
ROCK Pi 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 Pi in maskrom mode is rkdevelop tool, an open source tool by Rockchip.
- ROCK Pi 4 mainboard
- eMMC module
- Power adapter
- USB Male A to Male A cable(important)
To build rkdeveloptool on a debain based Linux distribution, follow the instruction below:
Install build dependecy:
sudo apt-get install libudev-dev libusb-1.0-0-dev dh-autoreconf
Clone the source code and build:
git clone https://github.com/rockchip-linux/rkdeveloptool cd rkdeveloptool autoreconf -i ./configure make
Now you have rkdeveloptool executable at the current directory.
sudo cp rkdeveloptool /usr/local/bin/
Boot the board to maskrom mode
To boot ROCK Pi into maskrom mode is simple, you don't need to press any key
- Power off the board and remove any bootable storage media, remove microSD card, remove eMMC module.
- Plug the USB Male A to Mail A cable to ROCK Pi 4 OTG port(the upper USB3 port), the other side to PC
- Power on the board
Now on your Linux PC, lsusb command show show the following usb devices
Bus 003 Device 005: ID 2207:330c
It means the device is in maskrom mode now.
- Now plug the eMMC module and proceed the next step to flash.
Install to eMMC via USB
On your PC, run the rkdeveloptool
rkdeveloptool ld # List the device DevNo=1 Vid=0x2207,Pid=0x330c,LocationID=305 Maskrom
Download the loader (flash helper) to init the ram and prepare the flashing environment etc. If you don't have it, you can download it from here
rkdeveloptool db rk3399_loader_vxxxx.bin
Write the GPT image to eMMC, start to write from offset 0.
rkdeveloptool wl 0 /path/to/rockpi4b-xxx-gpt.img
Reboot the device
Now the device should boot the new image on eMMC
Install by partitions(optional)
Sometimes we only want to update a partition of the image, for example only the boot partition to update kernel only. We can flash by partitions
- If you have issue with flashing via USB OTG, start a new post on the forum. https://forum.radxa.com/c/dev