How To Upgrade The u-boot

Upgrade u-boot in kernel space

We use Fenix to build Ubuntu/Debian images. You can also use it to build the u-boot debian package.

  • Set the Fenix environment
$ source source env/
  • Build the u-boot debian package
$ make uboot
$ make uboot-deb

The you will find the u-boot debian package in directory build/images/debs/FENIX-VERSION/BOARD.

FENIX-VERSION: means the Fenix SDK version, e.g. 0.8.3
BOARD: means the khadas board you choosed, e.e. VIM3

So the package directory maybe: build/images/debs/0.8.3/VIM3, and the debian package maybe: linux-u-boot-vim3-vendor_0.8.3-2015.01_arm64.deb.

  • Upgrade the u-boot

Copy the u-boot debian package to the board and install it.

$ sudo dpkg -i linux-u-boot-vim3-vendor_0.8.3-2015.01_arm64.deb
$ sync
$ sudo reboot

Upgrade u-boot in u-boot command line

We can also upgrade the u-boot in u-boot command line mode. You need to setup the Serial Tool.

Use Fenix to build the uboot:

$ make uboot

The built u-boot is u-boot/fip/_tmp/u-boot.bin.

  • Power on the board and enter u-boot command line
  • Copy u-boot.bin to a U-Disk
  • Insert the U-Disk to the board
  • Execute the command to upgrade the u-boot
kvim3#usb_update bootloader u-boot.bin