VAR-SOM-MX6 Yocto Flash From Net

Flash From Network Yocto system

Flashing a complete Yocto system from Network using tftp & nfs

Host

Make sure you installed NFS server:

$ sudo apt-get install nfs-kernel-server
$ cd ~/var-som-mx6-dora-v3
$ sudo mkdir rootfs
$ cd rootfs
$ sudo tar xvf ../build_mx6q/tmp/deploy/images/vafsl-image-gui-varsommx6q.tar.bz2 

$ sudo gedit /etc/exports 

add:

/home/<uname>/var-som-mx6-dora-v3/rootfs *(rw,sync,no_root_squash,no_all_squash,no_subtree_check)

exit & save

$ sudo /etc/init.d/nfs-kernel-server restart

Make sure you installed TFTP server:

$ sudo apt-get install xinetd tftpd tftp
Verify:
$ ls /usr/sbin/in.tftpd
$ sudo gedit /etc/xinetd.d/tftp
service tftp
{
protocol = udp
port = 69
socket_type = dgram
wait = yes
user = nobody
server = /usr/sbin/in.tftpd
server_args = /tftpboot
disable = no
}
$ sudo mkdir /tftpboot
$ sudo chmod -R 777 /tftpboot
$ sudo /etc/init.d/xinetd restart
$ cp ~/var-som-mx6-dora/buildmx6q/tmp/deploy/images/varsommx6q/uImage /tftpboot

Target

make sure you have a serial connection to the target.

reset and hold the space bar. This will brink you to u-boot prompt

$ setenv serverip 192.168.1.188
$ setenv ethaddr a8:cc:3d:d9:b8:f5
$ setenv kernel uImage
$ setenv nfsroot /home/<uname>/fsl-community-bsp/rootfs
$ setenv bootcmd run bootcmd_net
$ saveenv 

You are all set. Pushing reset on the VAR-SOM-MX6 board will run your Yocto result file system.