Yocto Linux BSP Ver.B User Guide for iMX6 series

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Getting Started

Conventions

${PREBUILT_IMAGE} : compressed prebuilt image (*.img.gz)

${CONTAINER_NAME} : container name (e.g. imx6LBVB0016)

${BSP_TARBALL} : BSP tarball (*.tgz)

${BSP_HOME} : home directory of the BSP

${BDIR} : build directory (e.g. build_x11)

${MX6PROC} : i.MX6 Processor

mx6q for iMX6 Dual Quad Core
 

${IMX6PROC} : i.MX6 Processor

imx6q

${BOARD} : available target boards list below

rsb3430

${BOARD_REV} : board revision

a1

${MC} : machine code combined with ${IMX6PROC}${BOARD}${BOARD_REV}

for example,
imx6qrsb3430a1 for RSB-3430 A2
imx6qrom7420a2 for ROM-7420 A2
You can also use the command below to check supported machines on BSP
$ source setup-environment

${MEM_SIZE} : memory size

 1G/2G

${UC} : u-boot config

 1G/2G/4G/FSPI_1G/FSPI_2G...

${SD_DEVICE} : device name of SD card in Linux (e.g. /dev/sdf)

${SDCARD_IMAGE} : sdcard image built by bitbake (*.wic.bz2)

${WORKSPACE} : host workspace folders

${UBOOT} :u-boot version(e.g. 2016.03)

${KERNEL} : linux kernel version(e.g. 4.14.98)

${TOOLCHAIN} : toolchain installed directory(e.g. /opt/fsl-imx-x11/4.1.15-2.0.0)

debug console / serial console

serial terminal program (e.g. minicom, putty, teraterm ...) that serial port is configured to 115200 8N1

terminal console

terminal program (e.g. gnome-terminal, xfce4-terminal ...)

Docker install and setting

If you don't have docker in your system, then you can follow the below  steps to install docker and run it first.

To install Docker Engine on your platform

Please refer to Docker Installation Guide for details

To pull ubuntu 18.04 image from Docker Hub 

$ docker pull advrisc/u18.04-imx8lbv1

To create container

$ docker run --privileged -it --name ${CONTAINER_NAME} -v ${WORKSPACE}:/home/adv/adv-release-bsp -v /dev:/dev advrisc/u18.04-imx8lbv1 /bin/bash

Get BSP

You have two methods to put BSP into container created above

Download_BSP_From_GitHub

The following example shows how to download the Advantech Yocto BSP from GitHub.
For this example, a directory called adv-release-bsp is created for the project.
Refer to IoTGateway/BSP/Linux/iMX6/OS_Support_List , Official version "imx6LBVB0209" is taken as an example : 
$ git config --global user.name "Your Name"
$ git config --global user.email you@example.com
$ sudo chown adv:adv adv-release-bsp
$ cd adv-release-bsp
$ repo init -u git://github.com/ADVANTECH-Corp/adv-arm-yocto-bsp.git -b refs/tags/imx6LBVB0209 -m imx6LBVB0209.xml 
$ repo sync
If you want to get 5.10.35-2.0.0 bsp 
$ repo init -u git://github.com/ADVANTECH-Corp/adv-arm-yocto-bsp.git -b imx-linux-hardknott -m imx-5.10.35-2.0.0.xml 
$ repo sync
If you want to get 5.10.72-2.2.0 bsp
$ repo init -u git://github.com/ADVANTECH-Corp/adv-arm-yocto-bsp.git -b imx-linux-hardknott -m imx-5.10.72-2.2.0.xml 
$ repo sync
If you suffer "server certificate verification failed", you can use the following command to disable SSL verification in git repositories with self-signed certificates. 
$ export GIT_SSL_NO_VERIFY=1

or 

$ git config --global http.sslverify false
If you get "The unauthenticated git protocol on port 9418 is no longer supported.", you can try it. 
$ git config --global url."https://".insteadOf git://

Copy BSP tarball to Container

If you have BSP tarball (eg. imx6LBVB0029_2019-10-23.tgz), then you have to copy it into container.

Follow the steps below:

1.Exit container and back to local machine 

$ exit

2.Copy BSP tarball to ${WORKSPACE} , and change owner 

$ cp imx6LBVB0029_2021-10-23.tgz ${WORKSPACE}
$ sudo chown adv:adv ${WORKSPACE}/imx6LBVB0029_2021-10-23.tgz 

3.Back to container 

$ docker start ${CONTAINER_NAME}
$ docker attach ${CONTAINER_NAME}

4.Unpack BSP tarball 

$ tar zxvf imx6LBVB0029_2021-10-23.tgz

Downloads tarball

Not necessarily step
During building  Yocto image , it will generate downloads folder which includes all packages we need , but it usually can't fetch normally, so we keep this downloads folder. Then we can reduce some fetch failed issue.
You can get Downloads tarball (downloads_imx8_5.10.35.tar.gz) from following URL:
[downloads_imx8_5.10.35.tar.gz], md5 checksum: 912999faf861bf413cef4cf7a9f18dfa
If you get downloads tarball, you can copy to your ${WORKSPACE}

Follow the steps below:

1.Exit container and back to local machine 

$ exit

2.Copy Downloads tarball to ${WORKSPACE} , and change owner 

$ cp downloads_imx8_5.10.35.tar.gz ${WORKSPACE}
$ sudo chown adv:adv ${WORKSPACE}/downloads_imx8_5.10.35.tar.gz 

3.Back to container 

$ docker start ${CONTAINER_NAME}
$ docker attach ${CONTAINER_NAME}

4.Unpack Downloads tarball 

$ tar zxvf downloads_imx8_5.10.35.tar.gz

5.make link to downloads folder 

$ cd adv-release-bsp
$ ln -s ${WORKSPACE}/downloads_imx8_5.10.35 downloads

Introducing BSP

The BSP is based on Yocto Project with Freescale enhanced features for i.MX6, plus specific target board features from Advantech Inc..
The Advantech Yocto Project BSP Release directory contains a "sources" directory, which contains the recipes used to build,

one or more build directories, and a set of scripts used to set up the environment.

The recipes used to build the project come from both the community and Advantech. The Yocto Project layers are downloaded

to the sources directory. This sets up the recipes that are used to build the project.


Naming Rule

The tarball/prebuilt image name is consist of the model name followed by "LB" or "LI" plus version number and released date.
For example, BSP file name: imx6LBVA0010_2019-08-27.tgz
which , "LB" is acronym of Linux BSP,
           "VA0010" stands for Version A.0010 .


For example, Yocto image name: '3420A1AIM20LIVA0010_iMX6M_2G_2020-08-27.img.gz'
which "5720A1" stands for RSB-3430 A1
          "LI" is acronym for prebuilt Linux Image
          "2G" is DDR size

BSP Content

The description of some important folders list below:
sources/
meta-advantech/ : meta layer by Advantech
meta-fsl-*/ : meta layer by Freescale
fsl-setup-release.sh : to create one new build environment
setup-environment : to continue an exist build environment

Build Instructions

To create one new build environment

Perform the following commands in terminal console
$ cd ${BSP_HOME}
$ MACHINE=${MC} DISTRO=fsl-imx-xwayland source imx-setup-release.sh -b ${BDIR}
We can specify u-boot default config like below
$ MACHINE=${MC} UBOOT_CONFIG=${UC} DISTRO=fsl-imx-xwayland source imx-setup-release.sh -b ${BDIR}
You need to read and accept the EULA.
RTENOTITLE

To continue an exist build environment

Perform the following commands in terminal console
$ cd ${BSP_HOME}
$ source setup-environment ${BDIR}


To build sdcard image

To create/continue a build environment
Perform the following command in terminal console
$ bitbake imx-image-full
The file, imx-image-full-${MC}.wic.bz2, will be located in directory, ./tmp/deploy/images/${MC}, while building process finished successfully.

To build toolchain installer

To create/continue a build environment
Perform the following command in terminal console
$ bitbake meta-toolchain
The below installer will be located in the directory "./tmp/deploy/sdk".
fsl-imx-xwayland-glibc-x86_64-meta-toolchain-aarch64-toolchain-${KERNEL}-zeus.sh

To build bootloader

To create/continue a build environment
Perform the following command in terminal console
$ bitbake imx-boot

 

To build linux kernel

To create/continue a build environment
If you operate on docker images, please install tmux application before running this command
$ sudo apt-get install tmux
Type following command to enter tmux
$ tmux
Perform the following command in terminal console to show up menuconfig
$ bitbake linux-imx -c menuconfig
After edit menuconfig, type following command to exit tmux windows
$ exit
to build kernel image
$ bitbake linux-imx
The two files, Image & Image-${IMX6PROC}-${BOARD}-${BOARD_REV}.dtb, will be located in the directory, ./tmp/deploy/images/${MC}.

Creating boot-up on-board flash from prebuilt image

To create one boot-up SD card

Perform the following command in terminal console
# gunzip -c ${PREBUILT_IMAGE} | dd of=${SD_DEVICE} bs=1M
# sync

Creating boot-up on-board flash from built sdcard image

To create one boot-up SD card

Perform the following commands in terminal console
$ pushd ${BSP_HOME}/${BDIR}/tmp/deploy/images/${MC}
$ sudo bzcat ${SDCARD_IMAGE} | sudo dd of=${SD_DEVICE} bs=1M
$ sync
$ popd
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