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 eMMC partitions and Bootloader
Build artifacts from your OE build will be flashed into the on-board eMMC (in contrast to some other boards which run their images from an SDcard). The OpenEmbedded BSP layer assumes that the Linux Bootloaders and eMMC partition layout are used on the board (not the Android ones; by default HiKey comes pre-configured with the Android eMMC partition layout). You can download the latest Linux bootloader binaries from here.
Whether your board is using the Android eMMC partition layout or the Linux partition eMMC layout, you will use the Android
fastboot utility on your development host for managing the board’s eMMC partitions. If you are using a relatively recent Linux distribution on your development host, it probably already has a package that includes the
fastboot utility (it might be named something like
android-tools-fastboot) so go ahead and install it on your development host.
eMMC partiton in Hikey can be updated using the downloaded bootloader binaries by following the instructions here
At this point your eMMC has the following partition layout:
bootis used for the boot image (kernel, device tree, initrd)
systemis used for the root file system
Flashing build artifacts
At the end of any successful build you will end up with the following artifacts (amongst others)
IMAGEwith the name of image you built. For example, if you built
These will be found in your
After getting into
fastboot mode, following commands can be used to flash built images onto HiKey’s eMMC.
$ gunzip IMAGE-hikey.ext4.gz $ sudo fastboot flash boot boot-hikey.uefi.img $ ext2simg -v IMAGE-hikey.ext4 IMAGE-hikey.img $ sudo fastboot flash system IMAGE-hikey.img