Yocto Flash From Net: Difference between revisions

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== Build minimal file system==
== Build minimal file system==
<pre>
$ gedit ../sources/poky/meta/recipes-core/images/core-image-minimal-mtdutils.bb
$ gedit ../sources/poky/meta/recipes-core/images/core-image-minimal-mtdutils.bb
</pre>


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


Create a root file system and copy files:
  $ 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 xvf tmp/deploy/images/{{#var:MACHINE_NAME}}/core-image-minimal-mtdutils-{{#var:MACHINE_NAME}}.tar.bz2 -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
  $ 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


Insert the recovery SD card into your host PC and copy the following files from it (assuming it is mounted at /media):
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/usr/bin/*.sh ~/flash_rootfs/usr/bin
</pre>


Boot the board, stop the autoboot to get to the U-Boot command line, and set the following environment variables:
Boot the board, stop the autoboot to get to the U-Boot command line, and set the following environment variables:
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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 or custom install_yocto.sh to your requirements.

Revision as of 11:20, 12 January 2020

- 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 adopt it to your system and your requirements.
  3. Android can be flashed in the same way.

Build minimal file system

$ gedit ../sources/poky/meta/recipes-core/images/core-image-minimal-mtdutils.bb

Set the image to include: IMAGE_INSTALL += "mtd-utils imx-kobs mtd-utils-ubifs"
Build the system:

$ bitbake core-image-minimal-mtdutils

Create a root file system and copy files:

$ mkdir ~/flash_rootfs
$ sudo tar xvf tmp/deploy/images//core-image-minimal-mtdutils-.tar.bz2 -C ~/flash_rootfs
$ sudo cp tmp/deploy/images// /tftpboot
$ for f in tmp/deploy/images//*.dtb; do if [[ -L $f ]] && [[ $f != *.dtb ]]; then sudo cp $f /tftpboot/; fi done
$ sudo rename 's/-imx/imx/' /tftpboot/-*.dtb

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 .
You can update the images to use your images or custom install_yocto.sh to your requirements.