VAR-SOM-MX7 Yocto Recovery SD card
From Variscite Wiki
Variscite provides a recovery SD card image that can be used to install the pre-built U-Boot, Linux kernel and the file system into the internal storage of the SOM.
Preparing a recovery SD card
- Download mx7-som-recovery-sd.vXX.img.gz (latest) which is available on Variscite's FTP: ftp://customerv:Variscite1@ftp.variscite.com/VAR-SOM-MX7/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 mx7-som-recovery-sd.vXX.img.gz $ sudo umount /dev/sdX* $ sudo dd if=mx7-som-recovery-sd.vXX.img of=/dev/sdX bs=1M (Replace /dev/sdX with your actual device)
Recover NAND flash/eMMC
- Power-off the board.
- Insert the SD card into the SD card slot of the carrier board (DVK)
- Make sure the BOOT SELECT DIP switches are set to SD card: Setting the BOOT SELECT DIP switches
- Power up the board - it will boot into Linux from the SD card
Flash from GUI
Touch/Click on the appropriate icon:
- Install Yocto NAND flash: Flash Yocto to NAND flash
- Install Yocto eMMC: Flash Yocto to eMMC
Flash from command line
- Login as root (no password)
- From Linux command line, type one of flash options
$ install_yocto.sh - Flash Yocto into eMMC or NAND Flash (Follow instructions)
SD card image file tree
/opt/images/ └── Yocto ├── imx7d-var-som-emmc.dtb ├── imx7d-var-som-nand.dtb ├── rootfs.tar.bz2 ├── rootfs.ubi ├── u-boot.imx-nand ├── u-boot.imx-sd └── zImage
The install_yocto.sh script file is located at /usr/bin/