VAR-SOM-AM33 Yocto NAND Recovery: Difference between revisions

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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.<br>This SD card image includes a script (nand-recovery.sh) that installs all the boot images and root file-system.<br>  
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.<br>This SD card image includes a script (nand-recovery.sh) that installs all the boot images and root file-system.<br>  


'''Preparing rescue SD card'''
= Download Variscite's pre-built recovery SD card image =


*Plug your SD card to your Linux machine, run dmesg and see what device is added (i.e. /dev/sd<span style="color: rgb(255, 0, 0);">'''X'''</span>)
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/<br>
*gunzip am33-som-nand-recovery-sd.vX.img.gz (get latest)
*dd if=am33-som-nand-recovery-sd.vX.img of=/dev/sd<span style="color: rgb(255, 0, 0);">'''X'''</span> bs=128k
 
= Download Variscite's pre-built recovery SD card image =


Download am33-som-nand_recovery-sd-....img.gz from Variscite's FTP server: ftp://customerv:Variscite1@ftp.variscite.com/VAR-SOM-AM33/Software<br>
See: [[FTP]]


= Write the image to an SD card =
== 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)


* Plug-in the supplied SD card to your Linux HOST PC, run dmesg and see which device is added (i.e. /dev/sd<span style="color: rgb(255, 0, 0);">'''X'''</span>)
$ sudo umount /dev/sdX?*
* Download am33-som-nand-recovery-sd-....img.gz (latest version available on Variscite FTP)
<pre>$ gunzip am33-som-nand-recovery-sd-....img.gz
# For .img.gz files:
$ sudo dd if=am33-som-nand-recovery-sd-....img of=/dev/sdX bs=1M
$ zcat <image name>.img.gz | sudo dd of=/dev/sdX bs=1M && sync
Replace /dev/sdX with your true device, you can find it by running "dmesg | tail".
</pre>
(Replace /dev/sdX with your actual device)


= Connect target debug serial to linux host=
= Connect target debug serial to linux host=
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to connect target serial debug port to host PC
to connect target serial debug port to host PC


= Boot NAND recovery SD-Card=
= Boot NAND recovery SD card=


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



Latest revision as of 18:53, 4 March 2024

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).