VAR-SOM-AM43 Yocto NAND Recovery: Difference between revisions
From Variscite Wiki
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= Creating Variscite's prebuilt rescue SD-Card = | = Creating Variscite's prebuilt rescue SD-Card = | ||
* Plug-in the supplied SD card to your Linux HOST PC, run dmesg and see which device is added (i.e. /dev/ | * Plug-in the supplied SD card to your Linux HOST PC, run dmesg and see which device is added (i.e. /dev/sdb) | ||
* Download am43-som-nand-recovery-sd.vX.img.gz ( latest which is available on Variscite's FTP) | * Download am43-som-nand-recovery-sd.vX.img.gz ( latest which is available on Variscite's FTP) | ||
<pre>$ gunzip am43-som-nand-recovery-sd.vX.img.gz | <pre>$ gunzip am43-som-nand-recovery-sd.vX.img.gz | ||
$ sudo dd if=am43-som-nand-recovery-sd.vX.img of=/dev/ | $ sudo dd if=am43-som-nand-recovery-sd.vX.img of=/dev/sdX bs=1M | ||
Replace /dev/sdX with your true device, You can find it with dmesg. | Replace /dev/sdX with your true device, You can find it with dmesg. | ||
</pre> | </pre> | ||
Revision as of 11:19, 16 April 2017
NAND Recovery introduction
As an easy and fast way to recover the VAR-SOM-AM43 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 am43-som-nand-recovery-sd.vX.img.gz (get latest)
- dd if=am43-som-nand-recovery-sd.vX.img of=/dev/sdX bs=128k
Creating Variscite's prebuilt rescue SD-Card
- Plug-in the supplied SD card to your Linux HOST PC, run dmesg and see which device is added (i.e. /dev/sdb)
- Download am43-som-nand-recovery-sd.vX.img.gz ( latest which is available on Variscite's FTP)
$ gunzip am43-som-nand-recovery-sd.vX.img.gz $ sudo dd if=am43-som-nand-recovery-sd.vX.img of=/dev/sdX bs=1M Replace /dev/sdX with your true device, You can find it with dmesg.
Connect target debug serial to linux host
Follow : http://www.variscite.com/images/stories/DataSheets/VAR_DVK_AM43_Quick_Start_Guide.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)
- Push SW1 to SD-Card mode (On), and SW2 to non-eMMC (off)
- The board will automatically boot into Linux from SD-Card
- login as 'root', no password is required
NAND recovery script usage
NAND recovery script usage:
/sbin/nand-recovery.sh This script installs the Linux binaries on the VAR-SOM-AM43 NAND-Flash.