OpenEmbedded and Yocto

This page provides the Hikey specific instructions for flashing OpenEmbedded and Yocto images. For instructions on building the OE/Yocto images, please visit the generic OpenEmbedded guide.

Updating UFS partitions and Bootloader

To make sure that the UFS partitions and Bootloader is up to date follow our Board Recovery Guide

At this point your eMMC has the following partition layout:

boot is used for the boot image (kernel, device tree, initrd)
system or userdata can used for the root file system but not both

Flashing build artifacts

At the end of any successful build you will end up with the following artifacts (amongst others)

IMAGE-hikey960.ext4.gz and
boot-hikey960.uefi.img

Note: Replace IMAGE with the name of image you built. For example, if you built rpb-console-image then IMAGE will be rpb-console-image

These will be found in your tmp-rpb-glibc/deploy/images/hikey960 directory.

After getting into fastboot mode, following commands can be used to flash built images onto hikey960’s eMMC.

$ gunzip --force IMAGE-hikey960.ext4.gz
$ sudo fastboot flash boot boot-hikey960.uefi.img
$ ext2simg -v IMAGE-hikey960.ext4 IMAGE-hikey960.img

For using system partition for root file system:

$ sudo fastboot flash system IMAGE-hikey960.img
$ sudo fastboot erase userdata

For using userdata partition for root file system:

$ sudo fastboot flash userdata IMAGE-hikey960.img
$ sudo fastboot erase system

Note: Since in hikey960, root partition is being detected by UUID, so we need to make sure that only one partition has the generated file system image and other one should be empty.