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The Yocto Project is a set of tools that helps to create customized Linux systems. This is a short description of how to prepare the host computer and how to create a project with yocto.
Build Host
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Yocto Project is supported in many Linux Distributions, this descriptions refers to Ubuntu 20.04 LTS. For other Distributions you need to refer to the Yocto Project Reference Manual.
General requirements
This requirements are generally needed for Yocto Project in Ubuntu 20.04:
- free disk space: at least 50 GB
required packages:
Code Block language bash theme Midnight linenumbers true sudo apt install gawk wget git-core diffstat unzip texinfo gcc-multilib build-essential chrpath socat cpio \ python3 python3-pip python3-pexpect xz-utils debianutils iputils-ping python3-git python3-jinja2 \ libegl1-mesa libsdl1.2-dev pylint3 xterm
(optional) VM with supported Linux OS
If you do not have installled Linux OS on your host computer, you can optionally run VM with a supported Linux OS:
e.g. with OracleVM:
VM Setup:
RAM: >= 8 GB
CPU: >= 4
HDD: 150 GB dynamically
ubuntu-20.04-desktop-amd64.iso
install vm guest additions
Network: network bridge
optional: add shared folder, enable drag and drop
- Note the general requirements
Install Yocto Project
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Create and navigate to yocto directory:
Code Block language bash theme Midnight linenumbers true mkdir yocto && cd yocto
Clone the Yocto Project sources (selected branch is 'Hardknott'. For other branches see: https://wiki.yoctoproject.org/wiki/Releases) :
Code Block language bash theme Midnight linenumbers true git clone -b hardknott https://git.yoctoproject.org/poky.git
Create a project for an Intel FPGA device
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The following steps are required to create an image for the Intel FPGA devices:
For Intel FPGA devices you need the meta-layer 'meta-altera'. Run following command to clone this meta-layer from github into the 'poky' folder:
Code Block language bash theme Midnight linenumbers true cd poky git clone -b master https://github.com/kraj/meta-altera.git
Run the oe-init-build-env script to initialize the environment:
Code Block language bash theme Midnight linenumbers true source oe-init-build-env
Add meta-altera layer to /yocto/poky/build/conf/bblayers.conf:
Code Block theme Midnight linenumbers true echo 'BBLAYERS += " ${TOPDIR}/../meta-altera "' >> conf/bblayers.conf
- Modify the /yocto/poky/build/conf/local.conf file:
Remove default configuration of the MACHINE variable and set it to a supported machine (see meta-altera for more information) of meta-altera layer e.g 'cyclone5':
Code Block theme Midnight linenumbers true sed -i /MACHINE\ \?\?=\ \"qemux86-64\"/d conf/local.conf echo "MACHINE = \"cyclone5\"" >> conf/local.conf
Set kernel version for meta-altera:
Code Block theme Midnight linenumbers true echo 'PREFERRED_PROVIDER_virtual/kernel = "linux-altera-lts"' >> conf/local.conf echo 'PREFERRED_VERSION_linux-altera = "5.4%"' >> conf/local.conf
Build the image:
Code Block theme Midnight linenumbers true bitbake core-image-minimal
This command can take several hours to run the first time.
References
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