Comprehensive Guide to Meta-RaspberryPi: Universal Hardware Support Package for Raspberry Pi

Comprehensive Guide to Meta-RaspberryPi: Universal Hardware Support Package for Raspberry Pi

by

Meta-raspberrypi is a Yocto BSP layer designed specifically for Raspberry Pi devices. This layer is compatible with various OpenEmbedded/Yocto distributions and layer stacks, providing richer hardware-specific features for Raspberry Pi devices. This article will give a detailed introduction to meta-raspberrypi, allowing you to gain an in-depth understanding of its features and usage.

Introduction to Meta-RaspberryPi

Meta-raspberrypi is a universal hardware-specific BSP overlay for Raspberry Pi devices. Its core BSP part should be compatible with different OpenEmbedded/Yocto distributions and layer stacks. Moreover, it has been officially approved by the Yocto Project as a Yocto-compatible layer. Once built, this layer can be used to boot Raspberry Pi devices.

For more information, please visit the official website: Raspberry Pi Official Website

Yocto Project Compatible Layer

Meta-raspberrypi is officially approved as a Yocto Project compatible layer, and you can find relevant details on the official Yocto Project website.

Dependencies

  • • URI: git://git.yoctoproject.org/poky

  • • Branch: master

  • • Version: HEAD

Quick Start

  1. 1. Run the following command to enter the build environment:

source poky/oe-init-build-env rpi-build

  1. 2. Add this layer to bblayers.conf and the above dependencies

  2. 3. Set MACHINE to one of the supported boards in local.conf

  3. 4. Run the following command to build the basic core image:

bitbake core-image-base

  1. 5. Use bmaptool to copy the generated wic.bz2 file to the SD card

  2. 6. Boot your RPI

Using Kas for Quick Start

  1. 1. Install the kas build tool from PyPi (sudo pip3 install kas)

  2. 2. Run the following command:

kas build meta-raspberrypi/kas-poky-rpi.yml

  1. 3. Use bmaptool to copy the generated wic.bz2 file to the SD card

  2. 4. Boot your RPI

Adjusting Build Configuration

If you need to adjust specific options (such as I2C, SPI, etc.) in the build configuration, simply add the following section:

local_conf_header:
  rpi-specific: |
    ENABLE_I2C = "1"
    RPI_EXTRA_CONFIG = "dtoverlay=disable-bt"

To configure the board, you will need to update the machine variable. The same goes for the distribution. For more information, please read the Kas Documentation.

Conclusion

Meta-raspberrypi provides rich hardware-specific features for Raspberry Pi devices and is perfectly compatible with the Yocto project. From quick start to build configuration adjustments, this article has provided a detailed introduction to meta-raspberrypi, hoping to help users easily build and customize the Yocto system for Raspberry Pi devices.

Project Address: https://github.com/agherzan/meta-raspberrypi

Leave a Comment