Yocto Flash From Net: Difference between revisions
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{{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-AM62 | | {{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-AM62 | | ||
<pre> | <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 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 ipaddr <TARGET_IP_ADDRESS> (replace <TARGET_IP_ADDRESS> with the IP address for the target) | ||
setenv image Image | => setenv image Image | ||
setenv fdtfile k3-am625-var-som-symphony.dtb | => setenv fdtfile k3-am625-var-som-symphony.dtb | ||
setenv rootpath "/home/<user>/rootfs" (replace <user> with the username on your host computer) | => 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 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 netboot 'tftp ${loadaddr} ${image}; tftp ${fdtaddr} ${fdtfile}; run netargs; booti ${loadaddr} - ${fdtaddr}' | ||
setenv bootcmd 'run netboot' | => setenv bootcmd 'run netboot' | ||
saveenv | => saveenv | ||
boot | => boot | ||
</pre> | </pre> | ||
| | | | ||
Revision as of 21:18, 23 July 2024
This page is using the default release RELEASE_MORTY_V1.0_DART-6UL.
To view this page for a specific Variscite SoM and software release, please follow these steps:
- Visit variwiki.com
- Select your SoM
- Select the software release
Flashing a complete Yocto system from Network using TFTP & NFS
- 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.