Once it done, you can find all required images under ~/smarc-imx8m-zeus-release/<build directory>/tmp/deploy/images/<machine name>/

You may want to build programs that aren’t installed into a root file system so you can make them available via a feed site (described below.) To do this you can build the package directly and then build the package named package-index to add the new package to the feed site.

The following example builds the tcpdump program and makes it available on the feed site:

deploy/images/<machine name>/* 

This folder contains the binary images for the root file system and the Embedian SMARC-iMX8M specific version of the boot file, Image and device tree file. Specifically the images are:

deploy/images/<machine name>/imx-boot-<machine name>-sd.bin-flash_evk 

This boot file binary for SMARC-iMX8M if your device has HDMI

deploy/images/<machine name>/imx-boot-<machine name>-sd.bin-flash_dp_evk 

This boot file binary for SMARC-iMX8M if your device has Display Port 

deploy/images/<machine name>/imx-boot-<machine name>-sd.bin-flash_evk_no_hdmi  

This boot file binary for SMARC-iMX8M if your device has no HDMI

deploy/images/<machine name>/Image

The kernel Image for SMARC-iMX.  

deploy/images/<machine name>/<device tee file>

Selecting display configuration is a matter of selecting an appropriate DTB file under deploy/images/<machine name>/<device tee file>

All available DTB files are listed in the table below.

deploy/images/<machine name>/fsl-image-validation-imx-<machine name>.*

Embedian root file system images for software development on Embedian’s SMARC-iMX8M  platforms without QT5.

deploy/images/<machine name>/fsl-image-qt5-validation-imx-<machine name>.*

Embedian root file system images for software development on Embedian’s SMARC-iMX8M  with QT5.

deploy/ipk/*

  This folder contains all the packages used to construct the root file system images. They are in opkg format (similar format to Debian packages) and can be dynamically installed on the target platform via a properly  constructed feed file. Here is an example of the feed file (named base-feeds.conf) that is used internally at Embedian to install upgrades onto a SMARC-iMX8M platform without reflashing the file system:

Setup SD Card Manually

For these instruction, we are assuming: DISK=/dev/mmcblk0, "lsblk" is very useful for determining the device id.

$ export DISK=/dev/mmcblk0

Erase SD card:

Create Partition Layout: Leave 2MB offset for boot file.

With util-linux v2.26, sfdisk was rewritten and is now based on libfdisk.

Create Partitions:

$ sudo sfdisk ${DISK} <<-__EOF__
2M,48M,0x83,*
50M,,,
__EOF__

$ sudo sfdisk --in-order --Linux --unit M ${DISK} <<-__EOF__
2,48,0x83,*
,,,-
__EOF__

Format Partitions:

Mount Partitions:

On some systems, these partitions may be auto-mounted...

Install Boot File (imx-boot-<machine name>-sd.bin-flash_evk, imx-boot-<machine name>-sd.bin-flash_dp_evk or imx-boot-<machine name>-sd.bin-flash_evk_no_hdmi)

Boot file is factory default flashed at on-module eMMC flash.

If on-module eMMC Flash is empty

In some cases, when eMMC flash is erased or the u-boot is under development, we need a way to boot from SD card first. Users need to shunt cross the TEST# pin to ground. In this way, SMARC-iMX8M will always boot up from SD card. 

Fuse flash.bin to the SD card. 

If on-module eMMC Flash is not empty

The <boot file> is pre-installed in on-module eMMC flash at factory default. SMARC-iMX8M is designed to always boot up from on-module eMMC flash and to load Image, device tree blob and root file systems based on the setting of BOOT_SEL. If users need to fuse your own flash.bin or perform u-boot upgrade. This section will instruct you how to do that.

Copy <boot file> to the second partition home directory of your SD card and boot into SD card. Go to home directory and you should see flash.bin file. 

Fuse <boot file> to the on-module eMMC flash. (The eMMC flash is emulated as /dev/mmcblk0 in SMARC-iMX8M)

uEnv.txt based bootscript

Create "uEnv.txt" boot script: ($ vim uEnv.txt)

Copy uEnv.txt to the boot partition:

$ sudo cp -v ~/uEnv.txt /media/boot/

Install Kernel Image

Copy Image to the boot partition:

$ sudo cp -v Image /media/boot

Install Kernel Device Tree Binary

All available DTB files are listed in the table below.

Install Root File System

Copy Root File System:

Yocto Built Rootfs:

$ sudo tar jxvf <filename.tar.bz2> -C /media/rootfs

Remove SD card:

Setup SD Card Automatically

This section tells you how to set up an SD card automatically. It mainly uses a script to do all the steps in the above section.

Shunt cross TEST# pin to ground and set the BOOT_SEL to ON OFF OFF. The module will boot up from SD card.  

Feed Packages 

You need to setup Apache2 web server on your development host machine first.

The Apache server default web page directory is /var/www/html .We need to populate it with a link pointing to our ipk package repository.

sudo ln -s /path/to/build-yocto/tmp/deploy/ipk /var/www/html/my-repo

The following procedure can be used on a Embedian SMARC-iMX8M device to download and utilize the feed file show above to install the tcpdump terminal emulation program:

$ export DISK=/dev/mmcblk0

$ sudo cp -v Image /media/rootfs/home/root

$ sudo cp -v <device tree blob> /media/rootfs/home/root/imx8mq-smarc.dtb

$ pushd /media/rootfs

$ sudo tar cvfz ~/smarcimx8mq-emmc-rootfs.tar.gz .

$ sudo mv ~/smarcimx8mq-emmc-rootfs.tar.gz /media/rootfs/home/root

$ popd

$ export DISK=/dev/mmcblk0

$ sudo mkfs.vfat -F 16 ${DISK}p1 -n boot

$ sudo mkfs.ext4 ${DISK}p2 -L rootfs

$ sudo mkdir -p /media/boot/dtbs

$ sudo cp -v imx8mq-smarc.dtb /media/boot/dtbs/

$ sudo tar -zxvf smarcimx8mq-emmc-rootfs.tar.gz -C /media/rootfs