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Recipe for building Yocto3.0 Linux for PN8M-090T

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Recipe for building Yocto 3.0 Linux for PN8M-090T

Recipe for building Yocto Linux for PN8M-090T

Check the compiling method on the open document form NXP:

Suggest O/S:Ubuntu 18.04 or later.

Please comment out content to the local.conf to avoid the error during building the SDL.

#PACKAGECONFIG_append_pn-qemu-native = " sdl"
#PACKAGECONFIG_append_pn-nativesdk-qemu = " sdl"

Storage: Please make sure the capacity of your storage has 300GB or bigger space.

RAM: Please make sure the physical memory + swap has 16GB or bigger capacity.


Step 1. Install Host packages:

Essential Yocto Project host packages:

$ sudo apt-get install gawk wget git-core diffstat unzip texinfo gcc-multilib build-essential chrpath socat cpio python python3 \
python3-pip python3-pexpect xz-utils debianutils iputils-ping python3-git python3-jinja2 libegl1-mesa libsdl1.2-dev pylint3 xterm

i.MX layers host packages for a Ubuntu 12.04 or 14.04 host setup are:

$ sudo apt-get install libsdl1.2-dev xterm sed cvs subversion coreutils texi2html \
docbook-utils python-pysqlite2 help2man make gcc g++ desktop-file-utils \ 
libgl1-mesa-dev libglu1-mesa-dev mercurial autoconf automake groff curl lzop asciidoc

Step 2. Change the python version under \user\bin\python and insall the repo utility:

Change the shortcut to python 2.7 to python 3.8 or later

$ /user/bin/python/python 2.7
change to 
$ /user/bin/python/python 3.8 // or later version

Create the bin folder in the home directory:

$ mkdir ~/bin
$ sudo apt --yes install curl
$ curl > ~/bin/repo
$ chmod a+x ~/bin/repo

Step 3. Add the following line to the .bashrc file to make sure the ~/bin folder is in the PATH.

export PATH=~/bin:$PATH

Step 4. Ensure the git is properly set up by commands below:

$ git config --global "Your Name" 
$ git config --global "Your Email" 
$ git config --list

Step 5. Download the i.MX Yocto Project Community BSP recipe layers:

$ mkdir imx-yocto-bsp 
$ cd imx-yocto-bsp 
$ repo init -u -b imx-linux-zeus -m imx-5.4.70-2.3.6.xml
$ repo sync

Step 6. Unzip the Recipe for building Yocto Linux for PN8M-090T to the file ‘imx-yocto-bsp”

Step 7. Create the setup environment by command below (You could change the file name as you want)

$ DISTRO=fsl-imx-xwayland MACHINE=dm421 source -b build-dmp

Please input “y” when the EULA confirmation pop out.

Step 8. Edit conf/local.conf file and add the content below at the bottom:

CORE_IMAGE_EXTRA_INSTALL += "chromium-ozone-wayland"

IMAGE_INSTALL_append += " \
    expand-rootfs \
    linux-firmware \

Step 9. Edit conf/bblayers.conf file and add the content below at the bottom:

BBLAYERS += " ${BSPDIR}/sources/meta-custom-dmp "

Step 10. Run the command below.

$ bitbake imx-image-full

The system will start to download and install source code, patch file, and compilation

Panel control

Control brightness of back-light

echo 0 > /sys/class/backlight/32e10000.mipi_dsi.0/brightness
echo 50 > /sys/class/backlight/32e10000.mipi_dsi.0/brightness
echo 100 > /sys/class/backlight/32e10000.mipi_dsi.0/brightness

Touch calibration has been put under /usr/bin by #recipe

How to install the image file by UUU.

After implemented bitbake imx-image-full, it will generate an image file and be stored in the file under build-dmp/tmp/deploy/images/dm421.

In the build-dmp/tmp/deploy/images/dm421 file, we’ll need the file below for the image restoration.

1. imx-image-full-dm421-XXXXXXXXXXXXXX.rootfs.wic.bz2
2. imx-boot-dm421-sd.bin-flash_evk

Input command to get the image file - imx-image-full-dm421-XXXXXXXXXXXXXX.rootfs.wic

(In this file, there are packaged kernel and rootfs):

$ bzip2 -d imx-image-full-dm421-XXXXXXXXXXXXXX.rootfs.wic.bz2

Download the sample:
UUU application under Linux:

SDP: boot -f imx-boot-dm421-sd.bin-flash_evk

  1. This command will be run when use SPL

SDPU: delay 1000 SDPU: write -f imx-boot-dm421-sd.bin-flash_evk -offset 0x57c00 SDPU: jump

  1. This command will be run when ROM support stream mode

SDPS: boot -f imx-boot-dm421-sd.bin-flash_evk

  1. These commands will be run when use SPL and will be skipped if no spl
  2. if (SPL support SDPV)

SDPV: delay 1000 SDPV: write -f imx-boot-dm421-sd.bin-flash_evk -skipspl SDPV: jump

FB: ucmd setenv fastboot_dev mmc FB: ucmd setenv mmcdev 2 FB: ucmd mmc dev 2 0 FB: flash -raw2sparse all imx-image-full-dm421.wic FB: flash bootloader imx-boot-dm421-sd.bin-flash_evk FB: ucmd if env exists emmc_ack; then ; else setenv emmc_ack 0; fi; FB: ucmd mmc partconf 2 ${emmc_ack} 1 0 FB: done

After you have set your own file name, you could input the command below to install the Yocto Linux