BSP Setup¶
This guide is based on the NXP/Freescale Yocto Project User’s Guide. You can read the full NXP BSP documentation on their Website: https://www.nxp.com/docs/en/user-guide/IMX_YOCTO_PROJECT_USERS_GUIDE.pdf
Note
Older releases of the NXP yocto layers contain references to codeaurora.org, which has been shutdown by March 31, 2023. If you need to use older releases contact <support@karo-electronics.de> for instructions.
References¶
The instructions for setting up and building Linux in the Yocto Project were adopted to our products.
A list of helpful bitbake commands can be found here:
Requirements¶
For Yocto a Linux host machine is needed.
Hint
The supported distributions for Yocto are listed at the official Yocto documentation.
If you’re already running a Linux host, you should be fine.
Windows users see Linux on Windows with WSL or Ubuntu on Windows 10.
An important consideration is the hard disk space required for the virtual appliance. It is recommended that at least 120 GiB is provided, 500 GiB would be better.
Host Packages¶
The Yocto framework requires (build) dependencies that need to be available on the host system for the builds.
Follow the instructions at the official Yocto project documentation to install the neccessary host packages for your system.
Setting up Git¶
If not already done, setup git with the commands below:
git config --global user.name "Your Name"
git config --global user.email "Your Email"
git config --list
Setting up the Repo Utility¶
Repo is a tool built on top of Git that makes it easier to manage projects that contain multiple repositories, which do not need to be on the same server. Repo complements very well the layered nature of the Yocto Project, making it easier for users to add their own layers to the BSP.
To install the repo utility, perform these steps:
Create a bin folder in the home directory:
mkdir -p ~/bin
curl https://storage.googleapis.com/git-repo-downloads/repo > ~/bin/repo
chmod a+x ~/bin/repo
Add the following line to the
~/.bashrcfile to ensure that the~/binfolder is in your PATH variable:
Hint
If the bin folder is already included in your PATH
variable, you should skip this step.
PATH=~/bin:$PATH
BSP Checkout¶
The Repo tool checks out different layers for you, which are defined in our XML-manifest. Their source code can be found
in the sources directory, which contains the recipes and machine configurations used to build the images.
fork |
Kernel Version |
Supported Machines |
|---|---|---|
|
6.1.52_2.2.0 |
|
|
6.1.36_2.1.0 |
|
|
6.1.1_1.0.0 |
|
(deprecated) |
5.15.71_2.2.0 |
|
(deprecated) |
5.10.72_2.2.0 |
|
(deprecated) |
5.10.9_1.0.0 |
|
(deprecated) |
5.4.70_2.3.0 |
|
Note
The directory karo-nxp-bsp is just an example and can be chosen freely.
The following command will checkout the latest version of the BSP in Branch scarthgap.
mkdir karo-nxp-bsp
cd karo-nxp-bsp
repo init -u https://github.com/karo-electronics/karo-nxp-bsp -b scarthgap
repo sync
Tip
If you want to checkout a previous Release Version, use repo as follows:
repo init -u https://github.com/karo-electronics/karo-nxp-bsp -b refs/tags/<tagname>
Release-Tags can be viewed on GitHub: https://github.com/karo-electronics/karo-nxp-bsp/tags
If errors occur during repo initialization, try deleting the .repo
directory and running the repo initialization commands again.