Yocto Recovery SD card: Difference between revisions

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--> {{#lst:Yocto_Platform_Customization|{{#var:RELEASE_PARAM}}}} <!--
--> {{PageHeader|Yocto Recovery SD card}} {{DocImage|category1={{#var:HARDWARE_NAME}}|category2=Yocto|}} __toc__
--> {{#lst:B2QT_Platform_Customization|{{#var:RELEASE_PARAM}}}} <!--
--> {{PageHeader|{{#ifeq: {{#var:OS}} | Boot2Qt | Boot2Qt | Yocto}} Recovery SD card}} {{DocImage|category1={{#var:HARDWARE_NAME}}|category2={{#ifeq: {{#var:OS}} | Boot2Qt | Boot2Qt | Yocto}}}} __toc__
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 the recovery SD card image ==
Download the latest recovery SD card from Variscite's FTP server: {{#var:RECOVERY_SD_URL}}<br>
Download the latest recovery SD card from Variscite's FTP server: {{#var:RECOVERY_SD_URL}}<br>
See detailed [{{#var:RECOVERY_SD_URL}}{{#var:RECOVERY_SD_PREFIX}}-recovery-sd.changelog Release Notes]
'''Note:''' Some web browsers have removed FTP support. Please see our [[FTP|FTP wiki page]].<br>
<br>{{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-MX8X | {{#ifeq: {{#var:MACHINE_NAME_B0}} | imx8qxpb0-var-som |
Note that i.MXQXP SOC revisions B0 and C0 each require a slightly different recovery SD card image (with their appropriate bootloader):<br>
For i.MXQXP SOC revisions B0 download var-som-mx8xb0-recovery-sd.vXX.img.gz<br>
For i.MXQXP SOC revisions C0 download var-som-mx8x-recovery-sd.vXX.img.gz|}}|}}


{{:Recovery_SD_card_general}}
{{:Recovery_SD_card_general}}
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* Login as root (no password)
* Login as root (no password)
* From Linux command line, run the following script:
* From Linux command line, run the following script:
<pre>
# install_yocto.sh - Install Yocto {{#ifeq: {{#var:OS}} | Boot2Qt | (Boot2Qt)&nbsp;}}to the SOM's internal storage (follow the printed instructions)
# install_yocto.sh - Install Yocto to the SOM's internal storage (follow the printed instructions)
</pre>


=== SD card image file tree ===
=== SD card image file tree ===

Revision as of 21:33, 8 June 2021

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 the latest recovery SD card from Variscite's FTP server: https://variscite-public.nyc3.cdn.digitaloceanspaces.com/DART-6UL/Software/yocto
Note: Some web browsers have removed FTP support. Please see our FTP wiki page.

Write the image to an SD card

During the SD card image writing all files and partitions are erased from target device.
Double check that the device is correct to avoid accidentally overwriting a different device and potentially damaging your existing operating system.

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)

$ sudo umount /dev/sdX?*

# For  files:
$  <image name>. | sudo dd of=/dev/sdX bs=1M && sync

(Replace /dev/sdX with your actual device)

Using a Windows based host

  • Download Win32 Disk Imager from: https://sourceforge.net/projects/win32diskimager/ and install it.
  • Extract the downloaded image:
    • For <image name>.img.gz, extract to get <image name>.img (using the latest 7-Zip for example)
    • For <image name>.img.zst, extract to get <image name>.img (using the latest WinRAR for example)
  • Insert your SD card into your PC.
    No need to format the SD card before writing the image to it, as the card will be formatted once it will be flashed.
  • Run the file named Win32DiskImager.exe (in Windows 7, 8 and 10 we recommend that you right-click this file and choose “Run as administrator”). 
  • If the SD card (Device) you are using isn’t found automatically. Click on the drop down box and select it 
  • In the Image File box, choose the <image name>.img file you have extracted previously 
  • Click Write 
  • After a few minutes, you receive a notification that your SD has been created successfully. 

Using a Mac OS X host

Use the dd Utility for MAC OS X to flash .img files to your SD card

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 Mode is set to SD card: see Setting the Boot Mode section
  • Power up the board - it will boot into Linux from the SD card


Flash from GUI

DART-6UL Recovery Sumo.png

Touch/Click on the appropriate icon:

  • Install Yocto NAND, WiFi: Flash Yocto with WiFi support to NAND flash
  • Install Yocto NAND, SD card: Flash Yocto with SD card support to NAND flash
  • Install Yocto eMMC (SD/WiFi) : Flash Yocto to eMMC (installs both SD card and WiFi dtbs to the BOOT partition and let U-Boot select between them at boot time)


Flash from command line

  • Login as root (no password)
  • From Linux command line, run the following script:
# install_yocto.sh	- Install Yocto to the SOM's internal storage (follow the printed instructions)

SD card image file tree

/opt/images/
└── Yocto
    ├── imx6ul-var-dart-emmc_wifi.dtb
    ├── imx6ul-var-dart-nand_wifi.dtb
    ├── imx6ul-var-dart-sd_emmc.dtb
    ├── imx6ul-var-dart-sd_nand.dtb
    ├── imx6ull-var-dart-emmc_wifi.dtb
    ├── imx6ull-var-dart-nand_wifi.dtb
    ├── imx6ull-var-dart-sd_emmc.dtb
    ├── imx6ull-var-dart-sd_nand.dtb
    ├── rootfs.tar.gz
    ├── rootfs.ubi
    ├── SPL-nand
    ├── SPL-sd
    ├── u-boot.img-nand
    ├── u-boot.img-sd
    └── zImage


The install_yocto.sh script file is located at /usr/bin/