Yocto Flash From Net
From Variscite Wiki
-Flash From Network Yocto system
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 nand-recovery into your host and copy files
$ sudo cp -a /media/rootfs/opt/images ~/flash_rootfs/opt/ $ sudo cp /media/rootfs/sbin/*.sh ~/flash_rootfs/sbin/
Boot into U-Boot and change environment variables
$ setenv serverip <your host ip address> $ setenv bootfile $ setenv fdt_file <relevant device tree> $ setenv nfsroot /home/<your username>/flash_rootfs $ setenv console ttymxc0
$ 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.