NAND Recovery introduction

As an easy and fast way to recover the VAR-SOM-AM33 NAND flash, Variscite provides a recovery SD card image that can be used to install the pre-built Linux and Android systems.
This SD card image includes a script (nand-recovery.sh) that installs all the boot images and root file-system.

Download Variscite's pre-built recovery SD card image

Download am33-som-nand_recovery-sd-….img.gz from Variscite's FTP server: sftp://customerv:Variscite1@ftp.variscite.com:2222/Public/VAR-SOM-AM33/Software

See: FTP

Using a Linux based host

Plug-in the SD card to your Linux host PC, run dmesg and see which device is added (i.e. /dev/sdX or /dev/mmcblkX)

$ sudo umount /dev/sdX?*

# For .img.gz files:
$ zcat <image name>.img.gz | sudo dd of=/dev/sdX bs=1M && sync

(Replace /dev/sdX with your actual device)

Connect target debug serial to linux host

Follow : http://www.variscite.com/images/stories/DataSheets/VAR_DVK_AM33_V1.11_Quick_Start_Guide_V1.0.pdf
to connect target serial debug port to host PC

Boot NAND recovery SD card

Power-off the board.
Insert the SD card into the SD/MMC slot of the carrier board (DVK)
Press and hold the boot-select button, and power-on the board while button is pressed
The board will automatically boot into Linux from the SD card
login as 'root', no password is required

NAND recovery script usage

NAND recovery script usage:

usage: /sbin/nand-recovery.sh options

This script install Linux/Android binaries in VAR-SOM-AM33 NAND.

OPTIONS:
  -h Show this message
  -o <Linux|Android> OS type (default: Linux).

VAR-SOM-AM33 Yocto NAND Recovery

Contents