Rock3/installusb-install-radxa-e25

    ROCK 3 >  Installation >   Install to eMMC from USB port (Radxa E25)

Radxa E25 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 Radxa E25 in maskrom mode is rkdevelop tool, an open source tool by Rockchip.

Power off the board
- remove microSD card
- ensure that the EMMC module is present
Plug the USB Male A to Mail A cable to ROCK E25 OTG port(the USB port), the other side to PC
Press and hold the golden button next to PMIC RK809-5 on Radxa CM3 Plus core board.
Power on the board
See usb device
- For Linux/macOS: lsusb result: Bus 001 Device 112: ID 2207:350a Fuzhou Rockchip Electronics Company
- For Windows: Open RKDevTool and you would see the device is in "maskrom mode".

Alternatively, if you are running Android and can access ADB, you can reboot the device to loader mode 'adb reboot bootloader' then use the rkdeveloptool to reset the device into maskrom mode 'rkdeveloptool rd 3' or Windows RKDevTool Switch button to go to maskrom mode.

Install to eMMC via USB

On your PC, run the rkdeveloptool

 rkdeveloptool ld
 DevNo=1	Vid=0x2207,Pid=0x350a,LocationID=104	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 rk356x_spl_loader_ddr1056_v1.06.110.bin

Write the GPT image to eMMC, start to write from offset 0. For example.

 rkdeveloptool wl 0 /path/to/radxa-e25-xxx-gpt.img

Please note that you can use zero.img instead of radxa-e25-xxx-gpt.img when erasing eMMC on board.

Reboot the device

 rkdeveloptool rd

Now the device should boot the new image on eMMC.

Troubleshooting

Check ROCK 3 FAQs first, if it doesn't help, start a new post on the forum https://forum.radxa.com/c/rock3.

Rock3/installusb-install-radxa-e25

Contents

Requirement

Install Tools&Drivers

Boot the board to maskrom mode

Install to eMMC via USB

Troubleshooting