How to make a custom Linux image for Toradex Apalis iMX6Q

I’m going to show you how to make a system image for Toradex iMX6Q with the following libraries:

  • OpenGL
  • Qt with EGLFS plugin

First of all we need to know about the YOCTO project and install the required packages.

What is Yocto?

The Yocto project provides a reference build sytem for embedded Linux, called Poky, which has the BitBake and OpenEmbedded-Core (OE-Core) projects at its base. The purpose of Poky is to build the components needed for an embedded Linux product, namely:

  1. A boot loader Image
  2. A linux kernel image
  3. A root filesystem
  4. Toolchain and SDK for aplication development

Then we need to clone the Yocto-OpenEmbedded project from Toradex. So we need to install git and git-repo programs, after that we need to configure the build process.

Toradex

  • Carrier: Ixora v1.1
  • GPU: Vivante GC2000
  • CPU: Cortex-A9

Hardware Requirements

  • CPU i3–8100 CPU @ 3.60GHz
  • RAM 16G
  • Storage 2T HDD

Install

Package Requirement

$ sudo apt-get install gawk wget git-core diffstat unzip texinfo gcc-multilib build-essential chrpath socat libsdl1.2-dev xterm make xsltproc docbook-utils fop dblatex xmlto autoconf automake libtool libglib2.0-dev python-gtk2 bsdmainutils screen

And these packages:

$ sudo dpkg --add-architecture i386$ sudo apt-get update$ sudo apt-get install g++-5-multilib$ sudo apt-get install curl dosfstools gawk g++-multilib gcc-multilib lib32z1-dev libcrypto++6:i386 libcrypto++-dev:i386 liblzo2-dev:i386 lzop libsdl1.2-dev libstdc++-5-dev:i386 libusb-1.0-0:i386 libusb-1.0-0-dev:i386 uuid-dev:i386 texinfo chrpath

Install Git

$ sudo apt install git$ git config --global user.name "Name"$ git config --global user.email Name@example.com

Install git-repo

$ mkdir ~/bin$ export PATH=~/bin:$PATH$ curl http://commondatastorage.googleapis.com/git-repo-downloads/repo > ~/bin/repo$ chmod a+x ~/bin/repo

Install Yocto-OpenEmbedded

$ mkdir oe-core$ cd oe-core$ repo init -u http://git.toradex.com/toradex-bsp-platform.git -b LinuxImageV2.8$ repo sync

In the oe-core directory we need to setup environment variable so we use the following command

. export or source export

All config files will be stored at build/config.

The build directory contains a conf directory with some files.

There are bblayers.conf and local.conf in the conf directory.

  • bblayers.conf: contains metadata layers.
  • local.conf: contains configuration variable.

Insert following configuration into local.conf file.

MACHINE ?= "apalis-imx6”#INHERIT += "rm_work”ACCEPT_FSL_EULA = "1”DISTRO_FEATURES_remove = "x11 wayland”IMAGE_INSTALL_remove = "eglinfo-x11”IMAGE_INSTALL_append = " qtbase qtbase-plugins cinematicexperience liberation-fonts"PACKAGECONFIG_FONTS_append_pn-qtbase = " fontconfig”IMAGE_INSTALL_remove = "backports"CORE_IMAGE_EXTRA_INSTALL += "openssh \vim \qtbase-plugins \qtbase-tools \qtdeclarative \qtdeclarative-tools \qtdeclarative-qmlplugins \qtmultimedia \qtmultimedia-plugins \qtmultimedia-qmlplugins \qtsvg \qtsvg-plugins \qtsensors \qtimageformats-plugins \qtsystems \qtsystems-tools \qtsystems-qmlplugins \qtscript \qt3d \qt3d-qmlplugins \qt3d \qt3d-qmlplugins \qt3d-tools \qtgraphicaleffects-qmlplugins \qtconnectivity-qmlplugins \qtlocation-plugins \qtlocation-qmlplugins \cinematicexperience \fb-test fbgrab fbida fbset-modes \es2gears \qt4-examples \"PACKAGECONFIG_append_pn-qtbase = " gles2 eglfs "DISTRO_FEATURES_append = " opengles2 egl opengl gles gbm dri eglfs gles2 "MACHINEOVERRIDES .= ":use-mainline-bsp"PACKAGECONFIG_append = " linuxfb eglfs gbm gles2 kms”PACKAGECONFIG_remove = "gl xcb xcb-xinput"

Start compiling with the following command:

bitbake console-tdx-image

After compile successfully finished we are going to setup network and U-BOOT configuration.

Then I can boot my custom Linux from network for development.

Reference