Building Ubuntu 22.04

Introduction

This article provides step-by-step instructions for building a Ubntu Gnome image with TechNexion's Yocto BSP, which supports the i.MX series of processors.

System Requirements

Building an image from source with Yocto requires a host with the following:

• 8GB RAM (more is better)
• 4 Core processor
• 200 GB storage

If less memory is used, then some additional swap space may be needed. Inadequate memory may result slow builds and random build errors.

In addition, the host must be connected to a network and have access to the Internet so that all source code and tools may be downloaded.

Set up build environment on host PC

Please refer to TechNexion Yocto 4.0 Kirkstone 5.15.y GA BSP - Set up build environment on host PC

• Select initial manifest file in section Download the BSP source
  Ex.

  repo init -u https://github.com/TechNexion/tn-imx-yocto-manifest.git -b kirkstone_5.15.y-stable -m imx-5.15.71-2.2.2.xml
  

Create build environment

There are several options regarding the build environment that you can use.

Configurations for setup script

Please refer to TechNexion Yocto 4.0 Kirkstone 5.15.y GA BSP - Configurations for setup script

Example BSP Setup and Build Commands for Supported Targets

Build Ubuntu for TechNexion target platform.

For EDM-G-IMX8MM

Xwayland image:

• Setup environment

  WIFI_FIRMWARE=y DISTRO=imx-desktop-xwayland MACHINE=edm-g-imx8mm BASEBOARD=wizard source tn-setup-release.sh -b build-desktop-edm-g-imx8mm
  

• Build image

  bitbake imx-image-desktop
  

For EDM-G-IMX8MN

Xwayland image:

• Setup environment

  WIFI_FIRMWARE=y DISTRO=imx-desktop-xwayland MACHINE=edm-g-imx8mn BASEBOARD=wb source tn-setup-release.sh -b build-desktop-edm-g-imx8mn
  

• Build image

  bitbake imx-image-desktop
  

For EDM-G-IMX8MP

Xwayland image:

• Setup environment

  WIFI_FIRMWARE=y DISTRO=imx-desktop-xwayland MACHINE=edm-g-imx8mp BASEBOARD=wizard source tn-setup-release.sh -b build-desktop-edm-g-imx8mp
  

• Build image

  bitbake imx-image-desktop
  

For PICO-IMX8MM

Xwayland image:

• Setup environment

  WIFI_FIRMWARE=y DISTRO=imx-desktop-xwayland MACHINE=pico-imx8mm BASEBOARD=pi source tn-setup-release.sh -b build-desktop-pico-imx8mm
  

• Build image

  bitbake imx-image-desktop
  

For PICO-IMX8MQ

Xwayland image:

• Setup environment

  WIFI_FIRMWARE=y DISTRO=imx-desktop-xwayland MACHINE=pico-imx8mq BASEBOARD=pi source tn-setup-release.sh -b build-desktop-pico-imx8mq
  

• Build image

  bitbake imx-image-desktop
  

Image Deployment

• When build completes, the generated release image is under directory <build_dir>/tmp/deploy/images/<MACHINE>
  Ex. PICO-IMX8MQ

  build-desktop-pico-imx8mq/tmp/deploy/images/pico-imx8mq
  

• To decompress the .bz2:

  bzip2 -fdk imx-image-desktop-XXX.rootfs.wic.bz2 imx-image-desktop-XXX.rootfs.wic
  

• To deploy the image to your board, please follow the instructions for loading software into the flash or microSD card of your development kit.
  • Use bmaptool to flash imx-image-desktop-XXX.rootfs.wic.bz2 directly.
    Ex. flash image of PICO-IMX8MQ to /dev/sdj

    bmaptool copy --bmap imx-image-desktop-pico-imx8mq.rootfs.wic.map imx-image-desktop-pico-imx8mq.rootfs.wic.bz2
    

    or

    bmaptool copy --nobmap imx-image-desktop-pico-imx8mq.rootfs.wic.bz2
    

    NOTE

    If bmaptool with --nobmap, it will take a long time to flash image.

About Login

• If you want to change the account or password, modify APTGET_ADD_USERS in <build_dir>/conf/local.conf.
  NOTE

  The password must be generated by openssl v1.x

Tutorial Video

We have put together a video showing this process, including download the image, into a PICO-IMX8M-MINI.