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ac6 >> ac6-training >> Operating Systems >> Linux >> Yocto Project Expert Download Catalog Download as PDF Write us Printable version

Y2 Yocto Project Expert

Advanced Yocto Project usage and adaptation

Advanced Yocto Project usage and adaptation
formateur
Objectives
  • Using and customizing Yocto
  • Creating Yocto-based Embedded Linux platforms
  • Using Yocto to develop components
  • Building out of tree modules
  • Setup Source cache
We use a recent Yocto version
Labs are conducted on qemu or on target boards, that can be:
    Dual Cortex/A7-based "STM32MP15-DISCO" boards from STMicroelectronics.
    Quad Cortex/A9-based "SabreLite" boards from NXP.
    Quad Cortex/A53-based "imx8q-evk" boards from NXP.
Prerequisite
Course environment
  • Printed course material (in English)
  • One Linux PC for two trainees.
  • One target platform for two trainees

First Day
Development process using the extensible SDK and devtool
  • Using devtool to create a package and its recipe
  • Using devtool to modify an existing package and recipe
  • Using devtool to update a recipe to build a new version of a package
Exercise:  Create, test and modify a recipe for an existing package using devtool
Develop and debug applications using SDK and eclipse
  • Adding eclipse remote debug packages
  • Configuring eclipse
Exercise:  Create remote debugging session using eclipse
Writing tasks in python
  • Introduction to python
  • Using python in Yocto
    • The main bitbake classes
    • Defining variable values in Python
    • Writing tasks in Python
Exercise:  Writing a task and customizing a recipe in Python
Porting Yocto
  • Porting Yocto to a new board
  • BSP architecture
    • Selecting and configuring u-boot recipe
    • Selecting and configuring kernel recipe
  • Adding a new BSP layer (yocto-bsp create)
Exercise:  Creating a new BSP layer
Second Day
BSP Development
  • Adding a custom u-boot to Yocto
  • Customizing the Yocto kernel recipe
    • Setting the default configuration
    • Adding patches
    • Specifying the kernel sources
  • Configuring Linux Kernel
    • Using menuconfig
    • Using patches
    • Creating Configuration Fragments
    • Validating Configuration
  • Kernel device tree
Exercise:  Create u-boot and kernel recipes to use custom versions, test the result
Exercise:  Patch kernel and activate new options using a fragment
Exercise:  Create and use a new device tree
Out-of-Tree Modules
  • Adding modules to image
  • Creating an out-of-tree module
  • Kernel modules with eSDK
Exercise:  Build and test modules
Tailoring the build system
  • Setting up a Yocto source cache
    • Local, per system, cache setup
    • Setting up a global, network wide, cache
  • Customizing the build system
    • Using a prebuilt toolchain
    • Using a pre-compiled kernel
  • Optimizing Yocto build times
    • Using prebuilt, binary, packages
    • Using shared compilation caches
Exercise:  Setting up a global source cache
Exercise:  Setting up an optimized build environment and rebuilding an image