Yocto Flash From Net: Difference between revisions
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= Flashing a complete Yocto system from Network using TFTP & NFS = | = Flashing a complete Yocto system from Network using TFTP & NFS = |
Revision as of 13:39, 9 October 2018
- 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
- Mix and match the nand-recovery version with the system you would like to flash.
- This is a concept Wiki. Please adopt it to your system and your requirements.
- 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 $ sudo cp tmp/deploy/images//-imx*.dtb /tftpboot/ $ 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.