Howto update DTB on Jetson Nano

[wahsiu]

Hi!

You may find useful the following link:

How to build NVIDIA Jetson Nano kernel

This is a detailed guide on how to compile the kernel from source code, and flash custom DTB and kernel image on the Jetson Nano.

You could use the following command from the Nano board to update the dtb:

Replacing the DTB on the Nano:

    sudo dd if=dtb/tegra210-p3448-0000-p3449-0000-a02.dtb.encrypt of=/dev/<DTB_SDCARD_PARTITION>

To generate the tegra210-p3448-0000-p3449-0000-a02.dtb.encrypt you should use create-jetson-nano-sd-card-image.sh script

Dear dgrba,thank you.

[mathieu.peyrega]

Hello,

I’m a new Jetson Nano devkit owner and reached the same conclusion that generating the encrypted .dtb on the Nano itself is not yet possible (r32.2.1) is that still the consensus ?

That’s a bit sad, because I was able to achieve all other stages of building a custom image on the nano itself, but I needed to move to PC host for generating the SDCard image and the

/JetPack_4.2_Linux_P3448/Linux_for_Tegra/bootloader/signed/tegra210-p3448-0000-p3449-0000-a02.dtb.encrypt

that I could flash with simple dd command on the nano itself (aim was to enable a /dev/pps0 device which I finalyy succeeded to !)

Are there any known ways to have the signing/encrypting process to work on the arm64 arch ? I guess its a matter of recompiling those /bootloader bianries… That would be great from Nvidia to have those ! (without the need to generate the full 4GB image would be even better !)

Regards,

Mathieu

[TacioTomcio]

Hi All,

From where I can get the script “create-jetson-nano-sd-card-image.sh”?

[ShaneCCC]

Has been moved to …Linux_for_Tegra/tools/jetson-disk-image-creator.sh