Yocto NAND Flash Burning: Difference between revisions

From Variscite Wiki
No edit summary
(Add support for Debian)
 
(One intermediate revision by the same user not shown)
Line 2: Line 2:
--> {{INIT_RELEASE_PARAM|RELEASE_MORTY_V1.0_DART-6UL}}<!--
--> {{INIT_RELEASE_PARAM|RELEASE_MORTY_V1.0_DART-6UL}}<!--
--> {{#lst:Yocto_Platform_Customization|{{#var:RELEASE_PARAM}}}} <!--
--> {{#lst:Yocto_Platform_Customization|{{#var:RELEASE_PARAM}}}} <!--
--> {{#lst:Debian_Platform_Customization|{{#var:RELEASE_PARAM}}}} <!--
--> {{#lst:B2QT_Platform_Customization|{{#var:RELEASE_PARAM}}}} <!--
--> {{#lst:B2QT_Platform_Customization|{{#var:RELEASE_PARAM}}}} <!--
--> {{#varexists:DEFAULT_IMAGE_BB_NAME | | {{ #vardefine:DEFAULT_IMAGE_BB_NAME | fsl-image-gui }} }} <!--
--> {{#varexists:DEFAULT_IMAGE_BB_NAME | | {{ #vardefine:DEFAULT_IMAGE_BB_NAME | fsl-image-gui }} }} <!--
--> {{#vardefine:PLATFORM_OS | {{#varexists:DEBIAN_NAME | Debian | Yocto }} }} <!--
--> {{#vardefine:BUILD_RELEASE_GUIDE | {{#varexists:DEBIAN_NAME | Yocto_Debian_Build_Release | Yocto_Build_Release }} }} <!--
--> {{#vardefine:BUILD_FOLDER_DISTRO | {{ #varexists:BUILD_FOLDER_X11 | {{#var:BUILD_FOLDER_X11}} | {{ #varexists:BUILD_FOLDER_XWAYLAND | {{#var:BUILD_FOLDER_XWAYLAND}} | {{#var:BUILD_FOLDER_B2QT}} }} }} }}<!--
--> {{#vardefine:BUILD_FOLDER_DISTRO | {{ #varexists:BUILD_FOLDER_X11 | {{#var:BUILD_FOLDER_X11}} | {{ #varexists:BUILD_FOLDER_XWAYLAND | {{#var:BUILD_FOLDER_XWAYLAND}} | {{#var:BUILD_FOLDER_B2QT}} }} }} }}<!--
--> {{#vardefine:SOC_SERIES|{{#var:SOC_SERIES|imx}}}} <!-- SOC_SERIES is not defined in some older YPC
--> {{#vardefine:SOC_SERIES|{{#var:SOC_SERIES|imx}}}} <!-- SOC_SERIES is not defined in some older YPC
--> {{PageHeader|Installing Yocto to the SOM's internal storage}} {{DocImage|category1=Yocto|category2={{#var:HARDWARE_NAME}}}} __toc__
--> {{PageHeader|Installing {{#var:PLATFORM_OS}} to the SOM's internal storage}} {{DocImage|category1={{#var:PLATFORM_OS}}|category2={{#var:HARDWARE_NAME}}}} __toc__
= Introduction =
= Introduction =
All SOMs can either boot from an SD card or from their internal storage.<br>
All SOMs can either boot from an SD card or from their internal storage.<br>
Line 64: Line 67:
}}
}}


= Installing the Yocto binaries =
= Installing the {{#var:PLATFORM_OS}} binaries =
If you followed the {{Varlink|Yocto_Build_Release#Create an extended SD card|{{#var:RELEASE_LINK}}|Create an extended SD card}} steps, the [[#Images locations|Yocto binaries]] and the [[#Flashing scripts|flashing scripts]] will be included in your SD card. <br>
If you followed the {{Varlink|{{#var:BUILD_RELEASE_GUIDE}}#Create an extended SD card|{{#var:RELEASE_LINK}}|Create an extended SD card}} steps, the [[#Images locations|{{#var:PLATFORM_OS}} binaries]] and the [[#Flashing scripts|flashing scripts]] will be included in your SD card. <br>
The flashing scripts are easy-to-use example scripts for flashing images into NAND flash / eMMC.<br>
The flashing scripts are easy-to-use example scripts for flashing images into NAND flash / eMMC.<br>
There is also a section below describing how to flash the images manually.
There is also a section below describing how to flash the images manually.
Line 71: Line 74:
== Images locations ==
== Images locations ==
Following is the directory structure on your SD card, which elaborates the files' location that the below installation scripts are expecting:
Following is the directory structure on your SD card, which elaborates the files' location that the below installation scripts are expecting:
{{#lst:Yocto_Platform_Customization|{{#var:SD_TREE_SECTION}}}}
{{#lst:{{#var:PLATFORM_OS}}_Platform_Customization|{{#var:SD_TREE_SECTION}}}}


{{#switch: {{#var:SOC_SERIES}} | imx8 | imx9=
{{#switch: {{#var:SOC_SERIES}} | imx8 | imx9=
Line 81: Line 84:
Copy all the mentioned yocto-built binaries to the SD card:
Copy all the mentioned yocto-built binaries to the SD card:
<br>
<br>
* <span style="color:red">Note:</span> If you followed the [[Yocto_Build_Release#Create an extended SD card |Create an extended SD card]] steps, the [[#Flashing scripts|flashing scripts]] and all relevant binaries are already included in your SD card, and the below commands are redundant!<br>
* <span style="color:red">Note:</span> If you followed the [[{{#var:BUILD_RELEASE_GUIDE}}#Create an extended SD card |Create an extended SD card]] steps, the [[#Flashing scripts|flashing scripts]] and all relevant binaries are already included in your SD card, and the below commands are redundant!<br>


Setup:
Setup:
  $ export YOCTO_IMGS_PATH={{#var:BUILD_FOLDER}}/{{#var:BUILD_FOLDER_DISTRO}}/tmp/deploy/images/{{#var:MACHINE_NAME}}
  $ export YOCTO_IMGS_PATH={{#var:BUILD_FOLDER}}/{{#var:BUILD_FOLDER_DISTRO}}/tmp/deploy/images/{{#var:MACHINE_NAME}}
  $ export P2_MOUNT_DIR=/media/rootfs/
  $ export P2_MOUNT_DIR=/media/rootfs/
  $ sudo mkdir -p ${P2_MOUNT_DIR}/opt/images/Yocto/
  $ sudo mkdir -p ${P2_MOUNT_DIR}/opt/images/{{#var:PLATFORM_OS}}/


{{#switch: {{#var:SOC_SERIES}} | imx8 | imx9=|#default=
{{#switch: {{#var:SOC_SERIES}} | imx8 | imx9=|#default=
Linux:
Linux:
  $ sudo cp ${YOCTO_IMGS_PATH}/{{#var:KERNEL_IMAGE}} ${P2_MOUNT_DIR}/opt/images/Yocto/
  $ sudo cp ${YOCTO_IMGS_PATH}/{{#var:KERNEL_IMAGE}} ${P2_MOUNT_DIR}/opt/images/{{#var:PLATFORM_OS}}/


Device Tree:
Device Tree:
  $ for f in ${YOCTO_IMGS_PATH}/*.dtb; do if <nowiki>[[ -L $f ]] && [[</nowiki> $f != *{{#var:MACHINE_NAME}}.dtb <nowiki>]]</nowiki>; then sudo cp $f ${P2_MOUNT_DIR}/opt/images/Yocto/; fi done
  $ for f in ${YOCTO_IMGS_PATH}/*.dtb; do if <nowiki>[[ -L $f ]] && [[</nowiki> $f != *{{#var:MACHINE_NAME}}.dtb <nowiki>]]</nowiki>; then sudo cp $f ${P2_MOUNT_DIR}/opt/images/{{#var:PLATFORM_OS}}/; fi done
  $ sudo rename 's/{{#var:KERNEL_IMAGE}}-imx/imx/' ${P2_MOUNT_DIR}/opt/images/Yocto/*.dtb
  $ sudo rename 's/{{#var:KERNEL_IMAGE}}-imx/imx/' ${P2_MOUNT_DIR}/opt/images/{{#var:PLATFORM_OS}}/*.dtb


NAND images:
NAND images:
  {{#ifeq: {{#var:SPL_SD_IMAGE_NAME}} | N/A ||SPL:
  {{#ifeq: {{#var:SPL_SD_IMAGE_NAME}} | N/A ||SPL:
  $ sudo cp ${YOCTO_IMGS_PATH}/{{#var:SPL_NAND_IMAGE_NAME}} ${P2_MOUNT_DIR}/opt/images/Yocto/
  $ sudo cp ${YOCTO_IMGS_PATH}/{{#var:SPL_NAND_IMAGE_NAME}} ${P2_MOUNT_DIR}/opt/images/{{#var:PLATFORM_OS}}/
  }}
  }}
   
   
  U-Boot:
  U-Boot:
  $ sudo cp ${YOCTO_IMGS_PATH}/{{#var:U-BOOT_NAND_IMAGE_NAME}} ${P2_MOUNT_DIR}/opt/images/Yocto/
  $ sudo cp ${YOCTO_IMGS_PATH}/{{#var:U-BOOT_NAND_IMAGE_NAME}} ${P2_MOUNT_DIR}/opt/images/{{#var:PLATFORM_OS}}/
   
   
  File System:
  File System:
  $ sudo cp ${YOCTO_IMGS_PATH}/{{#var:DEFAULT_IMAGE_BB_NAME}}-{{#var:MACHINE_NAME}}.ubi ${P2_MOUNT_DIR}/opt/images/Yocto/rootfs.ubi
  $ sudo cp ${YOCTO_IMGS_PATH}/{{#var:DEFAULT_IMAGE_BB_NAME}}-{{#var:MACHINE_NAME}}.ubi ${P2_MOUNT_DIR}/opt/images/{{#var:PLATFORM_OS}}/rootfs.ubi
}}
}}
eMMC images:
eMMC images:
{{#ifeq: {{#var:HARDWARE_NAME}}|VAR-SOM-MX6|*'''VAR-SOM-MX6 and VAR-SOM-SOLO/DUAL'''
{{#ifeq: {{#var:HARDWARE_NAME}}|VAR-SOM-MX6|*'''VAR-SOM-MX6 and VAR-SOM-SOLO/DUAL'''
  File System:
  File System:
  $ sudo cp ${YOCTO_IMGS_PATH}/{{#var:DEFAULT_IMAGE_BB_NAME}}-{{#var:MACHINE_NAME}}.tar.gz ${P2_MOUNT_DIR}/opt/images/Yocto/rootfs.tar.gz
  $ sudo cp ${YOCTO_IMGS_PATH}/{{#var:DEFAULT_IMAGE_BB_NAME}}-{{#var:MACHINE_NAME}}.tar.gz ${P2_MOUNT_DIR}/opt/images/{{#var:PLATFORM_OS}}/rootfs.tar.gz
|}} <!--
|}} <!--


-->{{#ifeq: {{#var:HARDWARE_NAME}}|VAR-SOM-MX6|*'''DART-MX6'''|}}
-->{{#ifeq: {{#var:HARDWARE_NAME}}|VAR-SOM-MX6|*'''DART-MX6'''|}}
  {{#ifeq: {{#var:SPL_SD_IMAGE_NAME}} | N/A ||SPL:
  {{#ifeq: {{#var:SPL_SD_IMAGE_NAME}} | N/A ||SPL:
  $ sudo cp ${YOCTO_IMGS_PATH}/{{#var:SPL_SD_IMAGE_NAME}} ${P2_MOUNT_DIR}/opt/images/Yocto/
  $ sudo cp ${YOCTO_IMGS_PATH}/{{#var:SPL_SD_IMAGE_NAME}} ${P2_MOUNT_DIR}/opt/images/{{#var:PLATFORM_OS}}/
|}}
|}}


Line 122: Line 125:
  <br>
  <br>
  U-Boot:  
  U-Boot:  
  $ sudo cp ${YOCTO_IMGS_PATH}/{{#var:BOOTLOADER_NAME}} ${P2_MOUNT_DIR}/opt/images/Yocto/{{#var:U-BOOT_SD_IMAGE_NAME}}
  $ sudo cp ${YOCTO_IMGS_PATH}/{{#var:BOOTLOADER_NAME}} ${P2_MOUNT_DIR}/opt/images/{{#var:PLATFORM_OS}}/{{#var:U-BOOT_SD_IMAGE_NAME}}
   
   
  File System:
  File System:
  $ sudo cp ${YOCTO_IMGS_PATH}/{{#var:DEFAULT_IMAGE_BB_NAME}}-{{#var:MACHINE_NAME}}.tar.gz ${P2_MOUNT_DIR}/opt/images/Yocto/rootfs.tar.gz
  $ sudo cp ${YOCTO_IMGS_PATH}/{{#var:DEFAULT_IMAGE_BB_NAME}}-{{#var:MACHINE_NAME}}.tar.gz ${P2_MOUNT_DIR}/opt/images/{{#var:PLATFORM_OS}}/rootfs.tar.gz
|
|
  <br>
  <br>
  U-Boot:  
  U-Boot:  
  $ sudo cp ${YOCTO_IMGS_PATH}/{{#var:U-BOOT_SD_IMAGE_NAME}} ${P2_MOUNT_DIR}/opt/images/Yocto/
  $ sudo cp ${YOCTO_IMGS_PATH}/{{#var:U-BOOT_SD_IMAGE_NAME}} ${P2_MOUNT_DIR}/opt/images/{{#var:PLATFORM_OS}}/
   
   
  File System:
  File System:
  $ sudo cp ${YOCTO_IMGS_PATH}/{{#var:DEFAULT_IMAGE_BB_NAME}}-{{#var:MACHINE_NAME}}.tar.gz ${P2_MOUNT_DIR}/opt/images/Yocto/rootfs.tar.gz
  $ sudo cp ${YOCTO_IMGS_PATH}/{{#var:DEFAULT_IMAGE_BB_NAME}}-{{#var:MACHINE_NAME}}.tar.gz ${P2_MOUNT_DIR}/opt/images/{{#var:PLATFORM_OS}}/rootfs.tar.gz
}}
}}


Line 138: Line 141:
The flashing scripts are located on the SD card at /usr/bin/:
The flashing scripts are located on the SD card at /usr/bin/:
  {{#switch: {{#var:SOC_SERIES}} | imx8 | imx9=
  {{#switch: {{#var:SOC_SERIES}} | imx8 | imx9=
  install_yocto.sh - Flash Yocto into eMMC (Run and follow usage instructions)
  install_{{lc:{{#var:PLATFORM_OS}}}}.sh - Flash {{#var:PLATFORM_OS}} into eMMC (Run and follow usage instructions)
|
|
  install_yocto.sh - Flash Yocto into NAND flash or eMMC (Run and follow usage instructions)
  install_{{lc:{{#var:PLATFORM_OS}}}}.sh - Flash {{#var:PLATFORM_OS}} into NAND flash or eMMC (Run and follow usage instructions)
}}
}}
  {{#ifeq: {{#var:HARDWARE_NAME}}|VAR-SOM-MX6|
  {{#ifeq: {{#var:HARDWARE_NAME}}|VAR-SOM-MX6|
  (install_yocto_emmc.sh - This script is being called by install_yocto.sh when choosing to install the rootfs to eMMC - it should not be called directly!)
  (install_{{lc:{{#var:PLATFORM_OS}}}}_emmc.sh - This script is being called by install_{{lc:{{#var:PLATFORM_OS}}}}.sh when choosing to install the rootfs to eMMC - it should not be called directly!)
  |}}
  |}}


Line 153: Line 156:
<br>
<br>
<pre>
<pre>
$ cd /opt/images/Yocto
$ cd /opt/images/{{#var:PLATFORM_OS}}
</pre>
</pre>


Line 212: Line 215:
  * '''DART-MX6'''
  * '''DART-MX6'''
  $ export node=/dev/mmcblk2
  $ export node=/dev/mmcblk2
  $ cd /opt/images/Yocto
  $ cd /opt/images/{{#var:PLATFORM_OS}}
* '''VAR-SOM-MX6 and VAR-SOM-SOLO/DUAL'''
* '''VAR-SOM-MX6 and VAR-SOM-SOLO/DUAL'''
}}
}}
  $ export node=/dev/{{#var:EMMC_ROOTFS_DEV}}  
  $ export node=/dev/{{#var:EMMC_ROOTFS_DEV}}  
  $ cd /opt/images/Yocto
  $ cd /opt/images/{{#var:PLATFORM_OS}}


Make sure the eMMC is not mounted:
Make sure the eMMC is not mounted:
Line 335: Line 338:
= Summary =
= Summary =
We described the results of a Yocto build, how to copy it to a bootable SD card and how to flash it to NAND and eMMC.<br>
We described the results of a Yocto build, how to copy it to a bootable SD card and how to flash it to NAND and eMMC.<br>
With our extended SD card and our recovery SD card we provide an installation script located at /usr/bin/install_yocto.sh. It is much safer to use it instead of flashing the system manually.<br>
With our extended SD card and our recovery SD card we provide an installation script located at /usr/bin/install_{{lc:{{#var:PLATFORM_OS}}}}.sh. It is much safer to use it instead of flashing the system manually.<br>

Latest revision as of 15:47, 21 April 2024

Warning: This page is designed to be used with a 'release' URL parameter.

This page is using the default release RELEASE_MORTY_V1.0_DART-6UL.
To view this page for a specific Variscite SoM and software release, please follow these steps:

  1. Visit variwiki.com
  2. Select your SoM
  3. Select the software release
Installing Yocto to the SOM's internal storage

Introduction

All SOMs can either boot from an SD card or from their internal storage.

The SOM's internal storage:
The Variscite DART-6UL has either an on-SOM NAND flash or eMMC, and either of them can be used to boot from and to hold the file system.
For NAND flash we use a UBI file system and for eMMC we use ext4.

NAND flash structure

0x000000000000-0x000000200000 : "spl"
0x000000200000-0x000000400000 : "u-boot"
0x000000400000-0x000000600000 : "u-boot_env"
0x000000600000-0x000000e00000 : "kernel"
0x000000e00000-End                          : "rootfs"

eMMC structure

0-4 MiB      : Non-partitioned space, saved for U-Boot.
4-12 MiB    : BOOT-VAR6UL - A FAT16 partition containing the Linux image and the device tree blob/s.
12 MiB-End: "rootfs" - An ext4 partition containing the root file system (including the kernel modules).

Yocto Built binaries for NAND flash / eMMC

The resulting images are located at tmp/deploy/images/imx6ul-var-dart.


Image Name
 How to use
fsl-image-gui-imx6ul-var-dart.sdcard This image is for SD card boot.
It can be flashed as-is on an SD card that can then be used to boot your system,
according to the relevant startup-guide of your product
(usually requires to press the boot select button, or toggle a DIP switch).
For detailed information refer to the Create a bootable SD card section below.
fsl-image-gui-imx6ul-var-dart.tar.gz Tarball with rootfs files.
Can be used to create an NFS root file system on the host.
See the Yocto Setup TFTP/NFS section for more info.
Also used to create our extended SD card.
See the Create a bootable SD card section below.
fsl-image-gui-imx6ul-var-dart.ubi A complete UBI image containing a UBIFS volume, for writing to NAND flash.
zImage Linux kernel image, same binary for SD card/eMMC or NAND flash.
SPL-sd SPL built for SD card boot or eMMC boot.
SPL-nand SPL built for NAND flash.
u-boot.img-sd U-Boot built for SD card boot or eMMC boot.
u-boot.img-nand U-Boot built for NAND flash.
File Name Description
zImage-imx6ul-var-dart-emmc_wifi.dtb Device tree blob for DART-6UL with eMMC & WI-FI enabled. (SD card & NAND disabled)
zImage-imx6ul-var-dart-nand_wifi.dtb Device tree blob for DART-6UL with NAND flash & WI-FI enabled. (SD card & eMMC disabled)
zImage-imx6ul-var-dart-sd_emmc.dtb Device tree blob for DART-6UL with SD card & eMMC enabled (WIFI & NAND disabled)
zImage-imx6ul-var-dart-sd_nand.dtb Device tree blob for DART-6UL with SD card & NAND flash enabled (WIFI & eMMC disabled)
zImage-imx6ull-var-dart-emmc_wifi.dtb Device tree blob for DART-6ULL with eMMC & WI-FI enabled. (SD card & NAND disabled)
zImage-imx6ull-var-dart-nand_wifi.dtb Device tree blob for DART-6ULL with NAND flash & WI-FI enabled. (SD card & eMMC disabled)
zImage-imx6ull-var-dart-sd_emmc.dtb Device tree blob for DART-6ULL with SD card & eMMC enabled (WIFI & NAND disabled)
zImage-imx6ull-var-dart-sd_nand.dtb Device tree blob for DART-6ULL with SD card & NAND flash enabled (WIFI & eMMC disabled)

Installing the Yocto binaries

If you followed the Create an extended SD card steps, the Yocto binaries and the flashing scripts will be included in your SD card.
The flashing scripts are easy-to-use example scripts for flashing images into NAND flash / eMMC.
There is also a section below describing how to flash the images manually.

Images locations

Following is the directory structure on your SD card, which elaborates the files' location that the below installation scripts are expecting: 

/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


Prepare the images for NAND flash / eMMC flashing

Plug the bootable SD card into your host machine and mount the rootfs partition - here we assume it is mounted on /media/rootfs.
Copy all the mentioned yocto-built binaries to the SD card:

Setup: 

$ export YOCTO_IMGS_PATH=~/var-fslc-yocto/build_x11/tmp/deploy/images/imx6ul-var-dart
$ export P2_MOUNT_DIR=/media/rootfs/
$ sudo mkdir -p ${P2_MOUNT_DIR}/opt/images/Yocto/

Linux: 

$ sudo cp ${YOCTO_IMGS_PATH}/zImage ${P2_MOUNT_DIR}/opt/images/Yocto/

Device Tree: 

$ for f in ${YOCTO_IMGS_PATH}/*.dtb; do if [[ -L $f ]] && [[ $f != *imx6ul-var-dart.dtb ]]; then sudo cp $f ${P2_MOUNT_DIR}/opt/images/Yocto/; fi done
$ sudo rename 's/zImage-imx/imx/' ${P2_MOUNT_DIR}/opt/images/Yocto/*.dtb

NAND images: 

SPL:
$ sudo cp ${YOCTO_IMGS_PATH}/SPL-nand ${P2_MOUNT_DIR}/opt/images/Yocto/

U-Boot:
$ sudo cp ${YOCTO_IMGS_PATH}/u-boot.img-nand ${P2_MOUNT_DIR}/opt/images/Yocto/

File System:
$ sudo cp ${YOCTO_IMGS_PATH}/fsl-image-gui-imx6ul-var-dart.ubi ${P2_MOUNT_DIR}/opt/images/Yocto/rootfs.ubi

eMMC images: 

SPL:
$ sudo cp ${YOCTO_IMGS_PATH}/SPL-sd ${P2_MOUNT_DIR}/opt/images/Yocto/



U-Boot: 
$ sudo cp ${YOCTO_IMGS_PATH}/u-boot.img-sd ${P2_MOUNT_DIR}/opt/images/Yocto/

File System:
$ sudo cp ${YOCTO_IMGS_PATH}/fsl-image-gui-imx6ul-var-dart.tar.gz ${P2_MOUNT_DIR}/opt/images/Yocto/rootfs.tar.gz

Flashing scripts

The flashing scripts are located on the SD card at /usr/bin/: 

install_yocto.sh	- Flash Yocto into NAND flash or eMMC (Run and follow usage instructions)

Manual step-by-step flashing to NAND flash

Use the prepared SD card to boot the board and run the following: 

$ cd /opt/images/{{#var:PLATFORM_OS}}

Flash SPL & U-Boot: 

$ flash_erase /dev/mtd0 0 0
$ kobs-ng init -x SPL-nand --search_exponent=1 -v
$ flash_erase /dev/mtd1 0 0
$ nandwrite -p /dev/mtd1 u-boot.img-nand
$ flash_erase /dev/mtd2 0 0

Flash the Linux Kernel image & Device Tree:
You need to use the right .dtb file for you hardware setup. See the table above for a complete description. 

$ flash_erase /dev/mtd3 0 0
$ nandwrite -p /dev/mtd3 zImage
$ nandwrite -p /dev/mtd3 -s 0x7e0000 <DEVICE_TREE_FILE>

Flash the (UBI) File System to NAND flash: 

$ ubiformat /dev/mtd4 -f rootfs.ubi

Manual step-by-step flashing to eMMC

Flashing the eMMC requires several steps including partitioning, file system formatting and image extraction.
We recommend to use our provided scripts to perform this task.

Use the prepared SD card to boot the board and run the following: 

$ export node=/dev/mmcblk1 
$ cd /opt/images/Yocto

Make sure the eMMC is not mounted: 

$ umount ${node}p*

Delete current data on eMMC: 

$ dd if=/dev/zero of=${node}p1 bs=1024 count=1024
$ dd if=/dev/zero of=${node}p2 bs=1024 count=1024
$ dd if=/dev/zero of=${node}p3 bs=1024 count=1024
$ dd if=/dev/zero of=${node}p4 bs=1024 count=1024
$ dd if=/dev/zero of=${node}p5 bs=1024 count=1024
$ dd if=/dev/zero of=${node}p6 bs=1024 count=1024
$ dd if=/dev/zero of=${node}p7 bs=1024 count=1024
$ sync
$ (echo d; echo 1; echo d; echo 2; echo d; echo 3; echo d; echo w) | fdisk ${node}
$ sync
$ dd if=/dev/zero of=${node} bs=1M count=4
$ sync

Create a partition table: 

$(echo n; echo p; echo 1; echo 8192; echo 24575; echo t; echo c; \
  echo n; echo p; echo 2; echo 24576; echo; \
  echo p; echo w) | fdisk -u ${node}
$ sync

Format the partitions: 

$ mkfs.vfat ${node}p1 -n BOOT-VAR6UL
$ mkfs.ext4 ${node}p2 -L rootfs


Flash SPL and U-Boot to eMMC: 

$ dd if=SPL-sd of=${node} bs=1K seek=1; sync
$ dd if=u-boot.img-sd of=${node} bs=1K seek=69; sync


Copy the Linux kernel image and the device tree blobs to the BOOT partition: 

$ mkdir /run/media/mmcblk1p1
$ mount -t vfat ${node}p1	/run/media/mmcblk1p1/
$ cp *emmc*.dtb			/run/media/mmcblk1p1/
$ cp zImage			/run/media/mmcblk1p1/
$ sync
$ umount /run/media/mmcblk1p1

Extract the rootfs archive: 

$ mkdir /run/media/mmcblk1p2
$ mount ${node}p2 /run/media/mmcblk1p2
$ tar xvpf rootfs.tar.gz -C /run/media/mmcblk1p2
$ sync
$ umount /run/media/mmcblk1p2


Summary

We described the results of a Yocto build, how to copy it to a bootable SD card and how to flash it to NAND and eMMC.
With our extended SD card and our recovery SD card we provide an installation script located at /usr/bin/install_yocto.sh. It is much safer to use it instead of flashing the system manually.

Retrieved from "https://variwiki.com/index.php?title=Yocto_NAND_Flash_Burning&oldid=26024"
Latest Modules
Support
Variscite Support Center
Contact Support
Product Longevity
Product Compliance Policy
Blog
Variscite Training
Variscite Website
This page was last edited on 21 April 2024, at 15:47.

© 2024 Variscite. All rights reserved