Latest revision as of 15:21, 24 July 2024

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DART-6UL - Flash Yocto images from network

Flashing a complete Yocto system from Network using TFTP & NFS

NOTES:

Please make sure your host system is ready to use TFTP/NFS. Use our Wiki if required: Yocto Setup TFTP/NFS
This is a concept Wiki. Please adapt it to your system and your requirements.
Android and Debian 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. -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.

@@ Line 4: / Line 4: @@
 --> {{#lst:Debian_Platform_Customization|{{#var:RELEASE_PARAM}}}} <!--
 --> {{#lst:B2QT_Platform_Customization|{{#var:RELEASE_PARAM}}}} <!--
--->                                 {{#vardefine:BUILD_PAGE|Yocto_Build_Release}}  {{#vardefine:PLATFORM_OS|Yocto}}        <!-- Default to Yocto
+-->                                 {{#vardefine:BUILD_PAGE|Yocto_Build_Release}}  {{#vardefine:PLATFORM_OS|Yocto}} {{#vardefine:INSTALL_SCRIPT|install_yocto.sh}} <!-- Default to Yocto
---> {{#varexists:DEBIAN_NAME      | {{#vardefine:BUILD_PAGE|Yocto_Debian_Build_Release}} {{#vardefine:PLATFORM_OS|Debian}}  | }} <!-- Debian
+--> {{#varexists:DEBIAN_NAME      | {{#vardefine:BUILD_PAGE|Yocto_Debian_Build_Release}} {{#vardefine:PLATFORM_OS|Debian}} {{#vardefine:INSTALL_SCRIPT|install_debian.sh}}  | }} <!-- Debian
 --> {{#varexists:B2QT_BSP_VERSION | {{#vardefine:BUILD_PAGE|B2QT_Build_Release}}   {{#vardefine:PLATFORM_OS|Boot2Qt}} | }} <!-- B2Qt
+--> {{COMMON_YOCTO_VARS}} <!--
 --> {{PageHeader|{{#var:HARDWARE_NAME}} - Flash Yocto images from network}} {{DocImage|category1={{#var:HARDWARE_NAME}}|category2=Yocto}} __toc__
@@ Line 19: / Line 20: @@
 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>
 Then, append the following to the conf/local.conf file in your Yocto build directory:
-  {{#switch: {{#var:SOC_SERIES}} | imx8 | imx9=
+  {{#switch: {{#var:SOC_SERIES}} | am6 | imx8 | imx9=
-  IMAGE_INSTALL_append = " bash e2fsprogs-mke2fs tar"
+  IMAGE_INSTALL{{#var:YOCTO_OVERRIDE_PREFIX}}append = " bash e2fsprogs-mke2fs tar dosfstools zstd"
 |#default=
-  IMAGE_INSTALL_append = " bash e2fsprogs-mke2fs tar mtd-utils imx-kobs mtd-utils-ubifs"
+  IMAGE_INSTALL{{#var:YOCTO_OVERRIDE_PREFIX}}append = " bash e2fsprogs-mke2fs tar mtd-utils imx-kobs mtd-utils-ubifs"
 }}
 And build the image:
+{{#switch: {{#var:SOC_SERIES}}
+ | am6=<br>
+ $ MACHINE={{#var:MACHINE_NAME}} bitbake core-image-minimal
+ | #default=<br>
   $ bitbake core-image-minimal
+}}
 Create a root file system and copy files:
@@ Line 32: / Line 38: @@
 <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 tar xf tmp/deploy/images/{{#var:MACHINE_NAME}}/core-image-minimal-{{#var:MACHINE_NAME}}.{{#var:ROOTFS_COMP_TARBALL_EXT}} -C ~/flash_rootfs
   $ sudo cp -a ~/flash_rootfs/boot/*.dtb /tftpboot
   $ sudo cp ~/flash_rootfs/boot/{{#var:KERNEL_IMAGE}} /tftpboot
+| am6=
+<br>
+ $ mkdir ~/flash_rootfs
+ $ sudo tar xf {{#var:DEPLOY_DIR}}/images/{{#var:MACHINE_NAME}}/core-image-minimal-{{#var:MACHINE_NAME}}.tar.zst -C ~/flash_rootfs
+ $ sudo cp -a ~/flash_rootfs/boot/* /tftpboot/
 |#default=
 <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 tar xf tmp/deploy/images/{{#var:MACHINE_NAME}}/core-image-minimal-{{#var:MACHINE_NAME}}.{{#var:ROOTFS_COMP_TARBALL_EXT}} -C ~/flash_rootfs
   $ sudo cp tmp/deploy/images/{{#var:MACHINE_NAME}}/{{#var:KERNEL_IMAGE}} /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
@@ Line 52: / Line 63: @@
   $ sudo /etc/init.d/nfs-kernel-server restart
+{{#switch: {{#var:SOC_SERIES}}
+| am6=
+Insert the recovery SD card into your host PC and copy the following files from it (assuming it is mounted at /media):
+ $ sudo mkdir ~/flash_rootfs/opt/
+ $ sudo cp -a /media/$USER/root/opt/images ~/flash_rootfs/opt/images
+ $ sudo cp /media/$USER/root/usr/bin/*.sh  ~/flash_rootfs/usr/bin/
+| #default=
 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:
-Boot the board, stop the autoboot to get to the U-Boot command line, and set the following environment variables:
+{{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-AM62 |
+<pre>
+=> setenv serverip <HOST_IP_ADDRESS>                (replace <HOST_IP_ADDRESS> with the actual IP address of your host - run 'ifconfig' on the host to get it)
+=> setenv ipaddr <TARGET_IP_ADDRESS>                (replace <TARGET_IP_ADDRESS> with the IP address for the target)
+=> setenv image Image
+=> setenv fdtfile k3-am625-var-som-symphony.dtb
+=> setenv rootpath "/home/<user>/rootfs"            (replace <user> with the username on your host computer)
+=> setenv netargs 'setenv bootargs console=${console} ${optargs} root=/dev/nfs nfsroot=${serverip}:${rootpath},nolock,v3 rw ip=${ipaddr}:::::eth0'
+=> setenv netboot 'tftp ${loadaddr} ${image}; tftp ${fdtaddr} ${fdtfile}; run netargs; booti ${loadaddr} - ${fdtaddr}'
+=> setenv bootcmd 'run netboot'
+=> saveenv
+=> boot
+</pre>
+| <br>
   => 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:
+  # 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
+  # {{#var:INSTALL_SCRIPT}}
 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}}.<br>
 You can update the images to use your images and/or customize install_yocto.sh to your requirements.

Yocto Flash From Net: Difference between revisions

Latest revision as of 15:21, 24 July 2024

Contents

Flashing a complete Yocto system from Network using TFTP & NFS

Build minimal file system