Yocto Flash From Net: Difference between revisions

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--> {{PageHeader|{{#var:HARDWARE_NAME}}-Flash From Network Yocto system}} {{DocImage|category1={{#var:HARDWARE_NAME}}|category2=Yocto}} __toc__
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-->                                {{#vardefine:BUILD_PAGE|Yocto_Build_Release}}  {{#vardefine:PLATFORM_OS|Yocto}}        <!-- Default to Yocto
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--> {{PageHeader|{{#var:HARDWARE_NAME}} - Flash Yocto images from network}} {{DocImage|category1={{#var:HARDWARE_NAME}}|category2=Yocto}} __toc__


= Flashing a complete Yocto system from Network using TFTP &amp; NFS  =
= Flashing a complete Yocto system from Network using TFTP &amp; NFS  =
{{note| NOTES:<br>
{{note| NOTES:<br>
#Please make sure your host system is ready to use TFTP/NFS. Use our WIKI if required: {{Varlink2|Yocto Setup TFTP/NFS|{{#var:RELEASE_LINK}}}}
#Please make sure your host system is ready to use TFTP/NFS. Use our Wiki if required: {{Varlink2|Yocto Setup TFTP/NFS|{{#var:RELEASE_LINK}}}}
#Mix and match the nand-recovery version with the system you would like to flash.
#This is a concept Wiki. Please adapt it to your system and your requirements.
#This is a concept Wiki. Please adopt it to your system and your requirements.
#Android can be flashed in the same way.
#Android can be flashed in the same way.
|info}}
|info}}


== Build minimal file system==
== Build minimal file system ==
<pre>
To setup a build environment follow steps 1 & 3 of the {{Varlink|{{#var:BUILD_PAGE}}|{{#var:RELEASE_LINK}}|Build {{#var:PLATFORM_OS}} from source code}} guide.<br>
$ gedit ../sources/poky/meta/recipes-core/images/core-image-minimal-mtdutils.bb
Then, append the following to the conf/local.conf file in your Yocto build directory:
</pre>
{{#ifeq: {{#var:SOC_SERIES}} | imx8 |
IMAGE_INSTALL_append = " bash e2fsprogs-mke2fs tar"
|
IMAGE_INSTALL_append = " bash e2fsprogs-mke2fs tar mtd-utils imx-kobs mtd-utils-ubifs"
}}


Set the image to include:
And build the image:
IMAGE_INSTALL += "mtd-utils imx-kobs mtd-utils-ubifs"<br>
$ bitbake core-image-minimal
Build the system:
<pre>
$ bitbake core-image-minimal-mtdutils
</pre>
 
Create a root file system and copy files


Create a root file system and copy files:
{{#ifeq: {{#var:SOC_SERIES}} | imx8 |
<br>
$ mkdir ~/flash_rootfs
$ sudo tar xf tmp/deploy/images/{{#var:MACHINE_NAME}}/core-image-minimal-{{#var:MACHINE_NAME}}.tar.gz -C ~/flash_rootfs
$ sudo cp -a ~/flash_rootfs/boot/*.dtb /tftpboot
$ sudo cp ~/flash_rootfs/boot/{{#var:KERNEL_IMAGE}} /tftpboot
|
<br>
  $ mkdir ~/flash_rootfs
  $ mkdir ~/flash_rootfs
  $ sudo tar xvf tmp/deploy/images/{{#var:MACHINE_NAME}}/core-image-minimal-mtdutils-{{#var:MACHINE_NAME}}.tar.bz2 -C ~/flash_rootfs
  $ sudo tar xf tmp/deploy/images/{{#var:MACHINE_NAME}}/core-image-minimal-{{#var:MACHINE_NAME}}.tar.gz -C ~/flash_rootfs
  $ sudo cp tmp/deploy/images/{{#var:MACHINE_NAME}}/{{#var:KERNEL_IMAGE}} /tftpboot
  $ sudo cp tmp/deploy/images/{{#var:MACHINE_NAME}}/{{#var:KERNEL_IMAGE}} /tftpboot
  $ sudo cp tmp/deploy/images/{{#var:MACHINE_NAME}}/{{#var:KERNEL_IMAGE}}-imx*.dtb /tftpboot/
  $ for f in tmp/deploy/images/{{#var:MACHINE_NAME}}/*.dtb; do if <nowiki>[[ -L $f ]] && [[</nowiki> $f != *{{#var:MACHINE_NAME}}.dtb <nowiki>]]</nowiki>; then sudo cp $f /tftpboot/; fi done
  {{#ifeq: {{#var:HARDWARE_NAME}}|VAR-SOM-MX6||$ sudo rename 's/{{#var:KERNEL_IMAGE}}-imx/imx/' /tftpboot/{{#var:KERNEL_IMAGE}}-*.dtb}}
  $ sudo rename 's/{{#var:KERNEL_IMAGE}}-imx/imx/' /tftpboot/{{#var:KERNEL_IMAGE}}-*.dtb
}}
 
Edit /etc/exports. E.g.
$ sudo gedit /etc/exports
...and add the following line to it (replace <uname> with the actual username):
/home/<uname>/flash_rootfs    *(rw,sync,no_root_squash,no_all_squash,no_subtree_check)
 
Restart the NFS server:
$ sudo /etc/init.d/nfs-kernel-server restart


Insert nand-recovery into your host and copy files
Insert the recovery SD card into your host PC and copy the following files from it (assuming it is mounted at /media):
<pre>
$ sudo cp -a /media/rootfs/opt/images ~/flash_rootfs/opt/
$ sudo cp -a /media/rootfs/opt/images ~/flash_rootfs/opt/
$ sudo cp /media/rootfs/usr/bin/*.sh ~/flash_rootfs/usr/bin/
$ sudo cp /media/rootfs/sbin/*.sh ~/flash_rootfs/sbin/
</pre>


Boot into U-Boot and change environment variables
Boot the board, stop the autoboot to get to the U-Boot command line, and set the following environment variables:


  $ setenv serverip <your host ip address>
  => setenv serverip <your host ip address>
  $ setenv bootfile {{#var:KERNEL_IMAGE}}
  => setenv nfsroot /home/<your username>/flash_rootfs
$ setenv fdt_file <relevant device tree>
   
$ setenv nfsroot /home/<your username>/flash_rootfs
If you want to set the fdt file yourself, instead of using the default auto detection:
  $ setenv console ttymxc0
=> setenv fdt_file <relevant device tree>


  $ setenv bootcmd 'run netboot'
  => setenv bootcmd 'run netboot'
  $ saveenv
  => saveenv
  $ boot
  => boot


On the target flash your system:
On the target flash your system:
<pre>
# install_yocto.sh
$ install_yocto.sh
</pre>


A complete system is flashed into the SOMs internal storage (NAND flash/eMMC).
A complete system is flashed into the SOMs internal storage (NAND flash/eMMC).<br>
Once the file system is built you can use it again and again to flash your {{#var:HARDWARE_NAME}}.  
Once the file system is built you can use it again and again to flash your {{#var:HARDWARE_NAME}}.<br>
You can update the images to use your images or custom install_yocto.sh to your requirements.
You can update the images to use your images and/or customize install_yocto.sh to your requirements.

Revision as of 16:24, 14 December 2021

DART-6UL - Flash Yocto images from network

Flashing a complete Yocto system from Network using TFTP & NFS

NOTES:
  1. Please make sure your host system is ready to use TFTP/NFS. Use our Wiki if required: Yocto Setup TFTP/NFS
  2. This is a concept Wiki. Please adapt it to your system and your requirements.
  3. Android can be flashed in the same way.

Build minimal file system

To setup a build environment follow steps 1 & 3 of the Build Yocto from source code guide.
Then, append the following to the conf/local.conf file in your Yocto build directory:

IMAGE_INSTALL_append = " bash e2fsprogs-mke2fs tar mtd-utils imx-kobs mtd-utils-ubifs"

And build the image:

$ bitbake core-image-minimal

Create a root file system and copy files:

$ mkdir ~/flash_rootfs
$ sudo tar xf tmp/deploy/images/imx6ul-var-dart/core-image-minimal-imx6ul-var-dart.tar.gz -C ~/flash_rootfs
$ sudo cp tmp/deploy/images/imx6ul-var-dart/zImage /tftpboot
$ for f in tmp/deploy/images/imx6ul-var-dart/*.dtb; do if [[ -L $f ]] && [[ $f != *imx6ul-var-dart.dtb ]]; then sudo cp $f /tftpboot/; fi done
$ sudo rename 's/zImage-imx/imx/' /tftpboot/zImage-*.dtb

Edit /etc/exports. E.g.

$ sudo gedit /etc/exports

...and add the following line to it (replace <uname> with the actual username):

/home/<uname>/flash_rootfs    *(rw,sync,no_root_squash,no_all_squash,no_subtree_check) 

Restart the NFS server:

$ sudo /etc/init.d/nfs-kernel-server restart

Insert the recovery SD card into your host PC and copy the following files from it (assuming it is mounted at /media):

$ sudo cp -a /media/rootfs/opt/images ~/flash_rootfs/opt/
$ sudo cp /media/rootfs/usr/bin/*.sh  ~/flash_rootfs/usr/bin/

Boot the board, stop the autoboot to get to the U-Boot command line, and set the following environment variables:

=> setenv serverip <your host ip address>
=> setenv nfsroot /home/<your username>/flash_rootfs

If you want to set the fdt file yourself, instead of using the default auto detection:
=> setenv fdt_file <relevant device tree>
=> setenv bootcmd 'run netboot'
=> saveenv
=> boot

On the target flash your system:

# install_yocto.sh

A complete system is flashed into the SOMs internal storage (NAND flash/eMMC).
Once the file system is built you can use it again and again to flash your DART-6UL.
You can update the images to use your images and/or customize install_yocto.sh to your requirements.