Yocto project
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The document explains the Yocto Project, an open-source initiative by the Linux Foundation that helps create custom Linux operating systems for embedded devices. It outlines its components, tools, and workflow, emphasizing its advantages such as cost efficiency, technical support, and rapid development capabilities. Case studies highlight its application in flood management and building automation solutions.
Yocto project
- 2. SummaryI What is Yocto ?.. Why Yocto ?.. What it Provides How it Works? Yocto Pros Case Studies
- 3. “ What is Yocto Project?.. ”
- 4. Yocto Project Linux OS Open Source Project Merged with OE Organized by Linux Foundation It’s not an embedded Linux distribution but it creates a custom one for you
- 6. Developer + = Let us Consider…. Linux OS VR Microwave Embedded Project
- 15. Yocto Components ArchitectureFoot Print Code BKM’s MethodsToolsTemplates Don’t Start from Scratch
- 16. “ How it Works?.. ”
- 18. User Configuration *.conf Add recipes and install them Add machine related information General policies for image being built
- 19. Upstream source Develop Upstream Branching tools Per BSP -Git tree (Collection of features!..) Kernel Feature Patches and configuration
- 20. Mirrors source from Git, SVN, Tarball or local Build System
- 21. Once sources are obtained, patches are applied Build System
- 22. Executes task that configure and Compile Build System
- 23. Packaging starts after Compilation -Configuration
- 24. Add packaged Images Create Images Create SDK - Cross development tool chain - Libraries & Headers - Setup cross developer environment
- 26. Yocto Pros Project Perspective Business Perspective Developer Perspective
- 28. Time Development Tools Embedded support Developer Perspective
- 29. Project Perspective Linux Kernel suited for embeddedenvironment UI Components – X11, Qt, GNOME Add/Remove Components Quick Emulator (QEMU) Forums/Community Hardware / Software Vendorsupport
- 31. Software Vendors
- 32. +…
- 34. Hydrosix: Flood Management Solution Challenges • Commercial OS Cost • Building a new OS takes time But!….
- 35. ADI: Building Automation & Energy Management Solution Challenges • Build prototypes & Automation in short time limit But!…. Built 3 prototypes in 3 months Going to use Yocto as their base OS for the future
- 36. Goal!….
- 37. “by Sriee Gowthem Raaj. ”
Editor's Notes
- #5: Yocto is focused to buid linux distribution for Embedded Linux independent of Software architecture being used It is based on Linux, cause linux is becoming popular in Embedded product industry Lead by Richard Purdue – A linux foundation fellow Open Embedded Merged with Yocto in March 11
- #18: Yocto Development Environment contains the following functional areas User configuration Metadata layers Source Fetching Build System Package feeds Images Application Development SDK
- #19: http://www.yoctoproject.org/docs/1.7.1/ref-manual/ref-manual.html#var-BB_NUMBER_THREADS 1. User Configuration Edit local/*.conf files. Use them set architecture type, number of BB threads – BB threads tells the build system for parallelization, where you want to store the output 2. Metadata - Add recipes 3. Machine BSP Configuration – Depends upon the type of architecture chosen 4. Policy Configuration – Defines the policies for build system to generate SDK built. For Example what should be build system output type – RPM or DEB
- #20: Source Fetching Develop projects and submit the source code to the server. This is called Upstream development. When you download the source code it is downstream. When team begin to create feature using their own board support packages then could add them to yocto project repository. If there is continuous upstream then yocto repository contains per BSP feature branch. Future users of Yocto can use this as their base. This is applicable for Kernel features also. Patches can be submitted for improving/optimizing linux kernel
- #21: Source mirror is a function of obtaining the source code. It can fetch source code from repositories [Source Code Manager(SCM)] or from the local folder. We can also specify the location of the repository in the configuration files, so that in compile time build system could fetch the source from local project location or from Git repository
- #24: Build system begins to package the files as per the policy configuration. RPM – Red Hat Package Manager DEB – Debian Package Manager IPK - Itsy Package Management System Build system analyzes and splits the packages and feeds them to Package feeds
- #25: Build system can use package feeds to develop Images or Software Development Kit SDK Images – supports the following file system [jffs2 jffs2.sum cramfs ext2 ext2.gz ext2.bz2 ext3 ext3.gz ext2.lzma btrfs live squashfs squashfs-xz ubi ubifs tar tar.gz tar.bz2 tar.xz cpio cpio.gz cpio.xz cpio.lzma vmdk elf] SDK – Will be in (*.sh) format which the developers can install. On install it will create headers/libraries/cross development tool chain – sets up the development environment
- #31: Hardware vendors take yocto project, customize it and create a Open Source Vendor (OSV) layer to satisfy their client needs.