Yocto Flash From Net

-Flash From Network Yocto system

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: TFTP & NFS
2. Mix and match the nand-recovery version with the system you would like to flash.
3. This is a concept Wiki. Please adopt it to your system and your requirements.
4. 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//-*.dtb /tftpboot/
$ sudo rename 's/-//' /tftpboot/-*.dtb

Insert nand-recovery into your host and copy files

$ sudo mkdir ~/flash_rootfs
$ sudo cp -a /media/rootfs/opt/images ~/flash_rootfs/opt/
$ sudo cp  /media/rootfs/sbin/nand-recovery.sh ~/flash_rootfs/sbin/

Boot into U-Boot and change environment variables

$ setenv serverip <your host ip address>
$ setenv bootfile uImage
$ setenv nfsroot /ws/ron/yocto-dora-fsl-beta/rootfs_min
$ setenv console ttymxc0
$ setenv bootcmd 'run netboot'
$ boot

On the target flash your system:

$ nand-recovery.sh

A complete system is flashed into nand. 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 nand-recovery.sh to your requirements.