VAR-SOM-MX6 Yocto NAND Recovery: Difference between revisions

Revision as of 07:45, 17 June 2015

Variscite provides a recovery SD-card image that can be used to install the pre-built U-Boot, Linux kernel and the UBI file system into the Nand-Flash 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-in the supplied SD card to your Linux machine, run dmesg and see which device is added (i.e. /dev/sdX or /dev/mmcblk0)
Download mx6-som-nand-recovery-sd.v38.img.gz (or latest which is available on Variscite's FTP)
Version 38 and above support all VAR-SOM-MX6 SOM's version and VAR-SOM-SOLO.

$ gunzip mx6-som-nand-recovery-sd.v38.img.gz
$ sudo dd if=mx6-som-nand-recovery-sd.v38.img of=/dev/sdX bs=128k
Replace /dev/sdX with your true device, You can find it with dmesg.

Recover Nand Flash:

Insert the SD card into the SD/MMC slot of the custom board
Press and hold the boot-select button, power-off and power-on the board
The board will automatically boot into Linux from SD-Card

Flash from GUI

Press the right arrow on the upper right corner to change the desktop into Utilities.

Push Android-eMMC to flash Android into eMMC.
Push Yocto-nand flash Yocto into nand.
Push Yocto-eMMC flash Yocto into eMMC. This option require changes in u-boot environment.

Flash from command line

Login as root (no password)
From Linux command line, type: "nand-recovery.sh" (This will install Yocto/Linux on the NAND)
Flash options
- android-emmc.sh
- yocto-emmc.sh
- yocto-nand.sh

@@ Line 29: / Line 29: @@
 *Login as root (no password)
 *From Linux command line, type: "nand-recovery.sh" (This will install Yocto/Linux on the NAND)
-*Help
+* Flash options
-nand-recovery.sh -h
+** android-emmc.sh
-                usage: /sbin/nand-recovery.sh options
+** yocto-emmc.sh
+** yocto-nand.sh
-                This script install Android(KitKat)/Yocto V6(Daisy)/Yocto V5(Dora) binaries in VAR-SOM-MX6 NAND.
-                OPTIONS:
-                -h                       Show this message
-                -o <Android|Yocto|Dora>  OS type (defualt: Yocto).
-                -m <Nand|Emmc>           Media type (defualt: Nand).
-*NAND:
-**To install Android type: "nand-recovery.sh -o Android".
-**To install Yocto Daisy type: "nand-recovery.sh -o Yocto".
-*eMMC:
-**To install Android type: "nand-recovery.sh -o Android -m Emmc".
-**To install Yocto Daisy type: "nand-recovery.sh -o Yocto -m Emmc".
-*NAND Dora
-*NAND:
-**To install Android type: "nand-recovery.sh -o Dora".
-*Reboot and Unplug the SD card