VAR-SOM-MX7 Yocto Recovery SD card: Difference between revisions
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{{DocImage|category1=VAR-SOM-MX7|category2=Yocto}} | {{PageHeader|VAR-SOM-MX7 - Yocto recovery SD card}} {{DocImage|category1=VAR-SOM-MX7|category2=Yocto}} | ||
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. | 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. | ||
== | == Download the recovery SD card image == | ||
Download mx7-som-recovery-sd.vXX.img.gz (latest) from Variscite's FTP server: ftp://customerv:Variscite1@ftp.variscite.com/VAR-SOM-MX7/Software/ | |||
== 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) | |||
<pre> | <pre> | ||
$ gunzip | $ gunzip mx6-som-recovery-sd.vXX.img.gz | ||
$ sudo umount /dev/sdX* | $ sudo umount /dev/sdX* | ||
$ sudo dd if= | $ sudo dd if=mx6-som-recovery-sd.vXX.img of=/dev/sdX bs=1M | ||
(Replace /dev/sdX with your actual device) | (Replace /dev/sdX with your actual device) | ||
</pre> | </pre> | ||
=== Using a Windows based host === | |||
Download Win32 Disk Imager from: https://sourceforge.net/projects/win32diskimager/, install and run it.<br> | |||
Select the image file, and the SD card device - double check that the device is correct to avoid accidentally overwriting a different device.<br> | |||
Click on "Write".<br> | |||
No need to format the SD card before writing the image to it.<br> | |||
== Recover NAND flash/eMMC == | == Recover NAND flash/eMMC == | ||
* Power-off the board. | * Power-off the board. | ||
* Insert the SD card into the SD card slot of the carrier board (DVK) | * Insert the SD card into the SD card slot of the carrier board (DVK) | ||
Revision as of 16:07, 7 February 2017
VAR-SOM-MX7 - Yocto recovery SD card
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.
Download the recovery SD card image
Download mx7-som-recovery-sd.vXX.img.gz (latest) from Variscite's FTP server: ftp://customerv:Variscite1@ftp.variscite.com/VAR-SOM-MX7/Software/
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)
$ gunzip mx6-som-recovery-sd.vXX.img.gz $ sudo umount /dev/sdX* $ sudo dd if=mx6-som-recovery-sd.vXX.img of=/dev/sdX bs=1M (Replace /dev/sdX with your actual device)
Using a Windows based host
Download Win32 Disk Imager from: https://sourceforge.net/projects/win32diskimager/, install and run it.
Select the image file, and the SD card device - double check that the device is correct to avoid accidentally overwriting a different device.
Click on "Write".
No need to format the SD card before writing the image to it.
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/