VAR-SOM-AM33 Yocto NAND Recovery

NAND Recovery

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.

Preparing rescue SD-Card

• Plug your SD card to your Linux machine, run dmesg and see what device is added (i.e. /dev/sdX)
• gunzip am33-som-nand-recovery-sd.vX.img.gz (get latest)
• dd if=am33-som-nand-recovery-sd.vX.img of=/dev/sdX bs=128k

Recover Nand Flash

• Insert the SD card into the SD/MMC slot of the custom board
• Press and hold the boot select switch while powering ON the board
  
• Login as root (no password)
• From Linux command line, type: "nand-recovery.sh". (This will install Linux on the NAND)
• Unplug the SD card and reboot

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 (defualt: Linux).
  -c Install kernel with capacitive touchscreen support (defualt: no).