VAR-SOM-MX6 Yocto NAND Recovery V60plus

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 a rescue SD card

• Download mx6-som-nand-recovery-sd.vXX.img.gz (latest) which is available on Variscite's FTP: ftp://customerv:Variscite1@ftp.variscite.com/VAR-SOM-MX6/Software/
• 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)

$ gunzip mx6-som-nand-recovery-sd.XX.img.gz
$ sudo dd if=mx6-som-nand-recovery-sd.vXX.img of=/dev/sdX bs=128k

(Replace /dev/sdX with your actual device)

Recover NAND Flash

• 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 SD card

Flash from GUI

• Click on the right arrowhead on the upper right corner to change the desktop into Utilities.

Click the appropriate button:

• Yocto Jethro SOLOCB NAND: Flash Yocto on NAND-Flash, on VAR-SOLOCUSTOMBOARD http://www.variscite.com/products/single-board-computers/var-solocustomboard
• Yocto Jethro SOLOCB eMMC: Flash Yocto on eMMC, on http://www.variscite.com/products/single-board-computers/var-solocustomboard
• Yocto Jethro MX6CB Res NAND: Flash Yocto on NAND-Flash, on http://www.variscite.com/products/single-board-computers/var-mx6customboard

Flash from command line

• Login as root (no password)
• From Linux command line, type one of flash options

$ install_android.sh 	- Flash Android into eMMC (Follow instructions)
$ install_yocto.sh	- Flash Yocto into eMMC or NAND Flash (Follow instructions)

SD card image file tree

/opt/images/
├── Android
│       ├── SPL
│       ├── SPL.mmc
│       ├── boot-imx6q-var-dart.img
│       ├── boot-som-mx6dl-c.img
│       ├── boot-som-mx6dl-r.img
│       ├── boot-som-mx6q-c.img
│       ├── boot-som-mx6q-r.img
│       ├── boot-som-mx6q-vsc.img
│       ├── boot-som-solo-c.img
│       ├── boot-som-solo-r.img
│       ├── boot-som-solo-vsc.img
│       ├── boot.img
│       ├── recovery-imx6q-var-dart.img
│       ├── recovery-som-mx6dl-c.img
│       ├── recovery-som-mx6dl-r.img
│       ├── recovery-som-mx6q-c.img
│       ├── recovery-som-mx6q-r.img
│       ├── recovery-som-mx6q-vsc.img
│       ├── recovery-som-solo-c.img
│       ├── recovery-som-solo-r.img
│       ├── recovery-som-solo-vsc.img
│       ├── recovery.img
│       ├── system.img
│       ├── u-boot-var-imx6-nand.img
│       └── u-boot-var-imx6-sd.img
└── Yocto
    ├── SPL
    ├── SPL.mmc
    ├── rootfs.tar.bz2
    ├── rootfs.ubi.img
    ├── u-boot.img
    ├── u-boot.img.mmc
    ├── uImage
    ├── uImage-imx6dl-var-som-solo-vsc.dtb
    ├── uImage-imx6dl-var-som-solo.dtb
    ├── uImage-imx6dl-var-som.dtb
    ├── uImage-imx6q-var-dart.dtb
    ├── uImage-imx6q-var-som-vsc.dtb
    └── uImage-imx6q-var-som.dtb