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**meta-ohos** is a set of bitbake layers for building OpenHarmony images
using the bitbake infrastructure.
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[[_TOC_]]
# Getting started
## Prerequisites
To start working with **meta-ohos** first install git repo:
$ sudo add-apt-repository ppa:zyga/oh-tools
$ sudo apt-get update
$ sudo apt-get install git-repo
## Building OpenHarmony image
Once git repo has been installed we can use it to clone the necessary repositories:
$ mkdir ohos; cd ohos
$ repo init -u https://git.ostc-eu.org/incubate/meta-ohos/manifest.git
$ repo sync
$ cd poky
poky$ . oe-init-build-env
Working directory will automatically change to ./poky/build. Add layers for
other kernels. Layers for poky were added automatically by sourcing
`oe-init-build-env`.
build$ bitbake-layers add-layer ../meta-openembedded/meta-oe
build$ bitbake-layers add-layer ../meta-openembedded/meta-python
build$ bitbake-layers add-layer ../meta-zephyr
build$ bitbake-layers add-layer ../meta-freertos
Build distro of your choice:
For Poky-tiny you can choose any of the following machines:
qemux86, qemux86-64, qemuarm, qemuarmv5
build$ DISTRO=poky-tiny MACHINE=qemux86 bitbake core-image-minimal
For Zephyr you can choose any of the following machines:
acrn, arduino-101-ble, arduino-101, arduino-101-sss, qemu-cortex-m3, qemu-nios2, qemu-x86
build$ DISTRO=zephyr MACHINE=qemu-x86 bitbake zephyr-philosophers
For FreeRTOS you can choose any of the following machines: qemuarmv5.
build$ DISTRO=freertos MACHINE=qemuarmv5 bitbake freertos-demo
For Zephyr, `zephyr-philosophers` is the one of sample applications available
in meta-zephyr layer by Yocto project. It's easy to build other samples using
recipes available in `meta-zephyr/recipes-kernel/zephyr-kernel/` directory.
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## Running OpenHarmony image
When the build is finished, you can run the image by issuing:
# For poky
build$ runqemu qemux86 ramfs qemuparams="-nographic"
# For Zephyr
build$ DEPLOY_DIR_IMAGE=tmp-newlib/deploy/images/qemu-x86 runqemu qemu-x86
# For FreeRTOS
build$ runqemu qemuarmv5
After successful bootup, you should see following:
# For Zephyr
Booting from ROM..*** Booting Zephyr OS build zephyr-v2.4.0 ***
Philosopher 0 [P: 3] THINKING [ 300 ms ]
Philosopher 1 [P: 2] EATING [ 575 ms ]
Philosopher 2 [P: 1] STARVING
Philosopher 3 [P: 0] EATING [ 525 ms ]
Philosopher 4 [C: -1] THINKING [ 475 ms ]
# For poky
qemux86 login:
# Default login is _root_ without a password.
# After login you should see prompt:
root@qemux86:~#
# For FreeRTOS
###### - FreeRTOS sample application -######
A text may be entered using a keyboard.
It will be displayed when 'Enter' is pressed.
Periodic task 10 secs
Waiting For Notification - Blocked...
Task1
Task1
You entered: "HelloFreeRTOS"
Unblocked
Notification Received
Waiting For Notification - Blocked...
To exit qemu, you can either shut down the system:
root@qemux86:~# poweroff -f
or close qemu using key combination:
Ctrl-a followed by 'x'
# meta-ohos architecture
All decisions for architecturally significant requirements are documented using
[adr-tools](https://github.com/npryce/adr-tools) and stored in [adr](./adr) subdirectory.
Decisions are discussed within MR of a given decision md file.
**meta-ohos** architecture is documented using [c4 model](https://c4model.com/).
## meta-ohos overview
