Yocto NAND Flash Burning: Difference between revisions
From Variscite Wiki
No edit summary |
(Add support for Debian) |
||
| (48 intermediate revisions by 6 users not shown) | |||
| Line 1: | Line 1: | ||
<!-- Set release according to "release" parameter in URL and use | <!-- Set release according to "release" parameter in URL and use MORTY_V1.0_DART-6UL as default | ||
--> {{# | --> {{INIT_RELEASE_PARAM|RELEASE_MORTY_V1.0_DART-6UL}}<!-- | ||
--> {{#lst: | --> {{#lst:Yocto_Platform_Customization|{{#var:RELEASE_PARAM}}}} <!-- | ||
--> {{PageHeader| | --> {{#lst:Debian_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 }} }} <!-- | |||
--> {{#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:SOC_SERIES|{{#var:SOC_SERIES|imx}}}} <!-- SOC_SERIES is not defined in some older YPC | |||
--> {{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> | |||
<br> | |||
The SOM's internal storage:<br> | |||
{{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-MX6 | | {{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-MX6 | | ||
* '''VAR-SOM-MX6 and VAR-SOM-SOLO/DUAL''' SOMs use the on-SOM NAND flash to boot.<br> | * '''VAR-SOM-MX6 and VAR-SOM-SOLO/DUAL''' SOMs use the on-SOM NAND flash to boot.<br> | ||
The file system can reside either on the NAND flash or the eMMC.<br> | The file system can reside either on the NAND flash or the eMMC.<br> | ||
When the file system resides on NAND, UBIFS file system is used.<br> | When the file system resides on the NAND flash, a UBIFS file system is used.<br> | ||
When file system resides on eMMC, ext4 file system is used.<br> | When the file system resides on the eMMC, an ext4 file system is used.<br> | ||
Regardless of the file system type and location, U-Boot will always boot from NAND. | Regardless of the file system type and location, U-Boot will always boot from the NAND flash.<br> | ||
* '''VAR-DART-MX6''' has an | By default, the kernel image and device tree blob are also written to the NAND flash (again, regardless of the file system type and location). | ||
* '''VAR-DART-MX6''' has only an on-SOM eMMC which can be used to boot from and to hold the filesystem. | |||
| | | | ||
{{# | {{#switch: {{#var:SOC_SERIES}} | imx8 | imx9= | ||
The Variscite {{#var:HARDWARE_NAME}} comes with eMMC, which holds | The Variscite {{#var:HARDWARE_NAME}} comes with eMMC, which holds U-Boot, the kernel image and the ext4 root file system.<br> | ||
| | | | ||
The Variscite {{#var:HARDWARE_NAME}} 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.<br> | The Variscite {{#var:HARDWARE_NAME}} 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.<br> | ||
| Line 20: | Line 31: | ||
}} | }} | ||
{{# | {{#switch: {{#var:SOC_SERIES}} | imx8 | imx9=|#default= | ||
| | |||
= NAND flash structure = | = NAND flash structure = | ||
{{#ifeq: {{#var:MACHINE_NAME}} | var-som-mx6 |* '''VAR-SOM-MX6 and VAR-SOM-SOLO/DUAL''' | {{#ifeq: {{#var:MACHINE_NAME}} | var-som-mx6 |* '''VAR-SOM-MX6 and VAR-SOM-SOLO/DUAL''' | ||
| Line 28: | Line 38: | ||
0x000000200000-0x000000400000 : "bootloader"<br> | 0x000000200000-0x000000400000 : "bootloader"<br> | ||
0x000000400000-0x000000c00000 : "kernel"'''<br> | 0x000000400000-0x000000c00000 : "kernel"'''<br> | ||
0x000000c00000-End : "rootfs" | 0x000000c00000-End : "rootfs" | ||
| | | | ||
0x000000000000-0x000000200000 : "spl"<br> | 0x000000000000-0x000000200000 : "spl"<br> | ||
| Line 34: | Line 44: | ||
0x000000400000-0x000000600000 : "u-boot_env"<br> | 0x000000400000-0x000000600000 : "u-boot_env"<br> | ||
0x000000600000-0x000000e00000 : "kernel"<br> | 0x000000600000-0x000000e00000 : "kernel"<br> | ||
0x000000e00000-End : "rootfs"<br>}} | 0x000000e00000-End : "rootfs"<br>}} | ||
}} | }} | ||
= eMMC structure = | = eMMC structure = | ||
{{# | {{#switch: {{#var:SOC_SERIES}} | imx8 | imx9= | ||
0-8 MiB : Non-partitioned space, saved for U-Boot.<br> | 0-8 MiB : Non-partitioned space, saved for U-Boot.<br> | ||
8 MiB-End: "rootfs" - An ext4 partition containing the root file system (including Linux image and the device tree blobs under /boot). | 8 MiB-End: "rootfs" - An ext4 partition containing the root file system (including Linux image and the device tree blobs under /boot). | ||
| | | | ||
{{#ifeq: {{#var:MACHINE_NAME}} | var-som-mx6 |* '''VAR-SOM-MX6 and VAR-SOM-SOLO/DUAL''' | |||
0 MiB-End: "rootfs" - An ext4 partition containing the root file system (including the kernel modules). | |||
* '''VAR-DART-MX6'''|}} | |||
0-4 MiB : Non-partitioned space, saved for U-Boot.<br> | 0-4 MiB : Non-partitioned space, saved for U-Boot.<br> | ||
4-12 MiB : {{#var:EMMC_FAT_PARTITION_NAME}} - A FAT16 partition containing the Linux image and the device tree blob/s.<br> | 4-12 MiB : {{#var:EMMC_FAT_PARTITION_NAME}} - A FAT16 partition containing the Linux image and the device tree blob/s.<br> | ||
12 MiB-End: "rootfs" - An ext4 partition containing the root file system (including the kernel modules). | 12 MiB-End: "rootfs" - An ext4 partition containing the root file system (including the kernel modules).}} | ||
}} | |||
{{# | {{#switch: {{#var:SOC_SERIES}} | imx8 | imx9=|#default= | ||
| | |||
= Yocto Built binaries for NAND flash / eMMC = | = Yocto Built binaries for NAND flash / eMMC = | ||
| Line 60: | Line 67: | ||
}} | }} | ||
= Installing the | = Installing the {{#var:PLATFORM_OS}} binaries = | ||
If you followed the | 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 | There is also a section below describing how to flash the images manually. | ||
== 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: | {{#lst:{{#var:PLATFORM_OS}}_Platform_Customization|{{#var:SD_TREE_SECTION}}}} | ||
{{# | {{#switch: {{#var:SOC_SERIES}} | imx8 | imx9= | ||
=== Prepare the images for flashing to eMMC === | === Prepare the images for flashing to eMMC === | ||
| | |#default= | ||
=== Prepare the images for NAND flash / eMMC flashing === | === Prepare the images for NAND flash / eMMC flashing === | ||
}} | }} | ||
| Line 77: | 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 [[ | * <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: | $ 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/ | $ sudo mkdir -p ${P2_MOUNT_DIR}/opt/images/{{#var:PLATFORM_OS}}/ | ||
{{# | {{#switch: {{#var:SOC_SERIES}} | imx8 | imx9=|#default= | ||
Linux: | Linux: | ||
$ sudo cp ${YOCTO_IMGS_PATH}/{{#var:KERNEL_IMAGE}} ${P2_MOUNT_DIR}/opt/images/ | $ 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/{{#var:PLATFORM_OS}}/; fi done | |||
$ | $ sudo rename 's/{{#var:KERNEL_IMAGE}}-imx/imx/' ${P2_MOUNT_DIR}/opt/images/{{#var:PLATFORM_OS}}/*.dtb | ||
$ sudo rename 's/{{#var:KERNEL_IMAGE}}-imx/imx/' ${P2_MOUNT_DIR}/opt/images/ | |||
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/ | $ 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/ | $ 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}/ | $ 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}/ | $ 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/ | $ sudo cp ${YOCTO_IMGS_PATH}/{{#var:SPL_SD_IMAGE_NAME}} ${P2_MOUNT_DIR}/opt/images/{{#var:PLATFORM_OS}}/ | ||
|}} | |}} | ||
{{# | {{#switch: {{#var:SOC_SERIES}} | imx8 | imx9= | ||
{{#vardefine:BOOTLOADER_NAME | {{#ifexpr: {{#var:KERNEL_VER}} >= 4.19 | imx-boot | imx-boot-{{#var:MACHINE_NAME}}-sd.bin }}}} | |||
<br> | <br> | ||
U-Boot: | U-Boot: | ||
$ sudo cp ${YOCTO_IMGS_PATH}/ | $ 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}/ | $ 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/ | $ 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}/ | $ 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 | ||
}} | }} | ||
== Flashing scripts == | == Flashing scripts == | ||
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= | |||
{{# | install_{{lc:{{#var:PLATFORM_OS}}}}.sh - Flash {{#var:PLATFORM_OS}} into 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_{{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!) | ||
|}} | |}} | ||
{{# | {{#switch: {{#var:SOC_SERIES}} | imx8 | imx9= | ||
| | | | ||
== Manual step-by-step flashing to NAND flash == | == Manual step-by-step flashing to NAND flash == | ||
| Line 155: | Line 156: | ||
<br> | <br> | ||
<pre> | <pre> | ||
$ cd /opt/images/ | $ cd /opt/images/{{#var:PLATFORM_OS}} | ||
</pre> | </pre> | ||
| Line 205: | Line 206: | ||
}} | }} | ||
}} | }} | ||
== Manual step-by-step flashing to eMMC == | == Manual step-by-step flashing to eMMC == | ||
| Line 213: | Line 215: | ||
* '''DART-MX6''' | * '''DART-MX6''' | ||
$ export node=/dev/mmcblk2 | $ export node=/dev/mmcblk2 | ||
$ cd /opt/images/ | $ 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/ | $ cd /opt/images/{{#var:PLATFORM_OS}} | ||
Make sure the eMMC is not mounted: | Make sure the eMMC is not mounted: | ||
$ umount ${node}p* | $ umount ${node}p* | ||
{{# | {{#switch: {{#var:SOC_SERIES}} | imx8 | imx9= | ||
Delete current data on eMMC: | Delete current data on eMMC: | ||
$ for((i=1; i<=16; i++)); do [ -e ${node}p${i} ] && dd if=/dev/zero of=${node}p${i} bs=1M count=1 conv=fsync; done | $ for((i=1; i<=16; i++)); do [ -e ${node}p${i} ] && dd if=/dev/zero of=${node}p${i} bs=1M count=1 conv=fsync; done | ||
| Line 233: | Line 235: | ||
Format the partitions: | Format the partitions: | ||
$ mkfs.ext4 ${node}p1 -L rootfs | $ mkfs.ext4 ${node}p1 -L rootfs | ||
$ sync | |||
Flash U-Boot: | Flash U-Boot: | ||
$ dd if={{#var:U-BOOT_SD_IMAGE_NAME}} of=${node} bs=1K seek= | $ dd if={{#var:U-BOOT_SD_IMAGE_NAME}} of=${node} bs=1K seek={{#var:U-BOOT_OFFSET}} conv=fsync | ||
Extract the rootfs archive: | Extract the rootfs archive: | ||
| Line 241: | Line 244: | ||
$ mount ${node}{{#var:EMMC_ROOTFS_PARTITION_NUM}} /run/media/{{#var:EMMC_ROOTFS_DEV}}{{#var:EMMC_ROOTFS_PARTITION_NUM}} | $ mount ${node}{{#var:EMMC_ROOTFS_PARTITION_NUM}} /run/media/{{#var:EMMC_ROOTFS_DEV}}{{#var:EMMC_ROOTFS_PARTITION_NUM}} | ||
$ tar xvpf rootfs.tar.gz -C /run/media/{{#var:EMMC_ROOTFS_DEV}}{{#var:EMMC_ROOTFS_PARTITION_NUM}} | $ tar xvpf rootfs.tar.gz -C /run/media/{{#var:EMMC_ROOTFS_DEV}}{{#var:EMMC_ROOTFS_PARTITION_NUM}} | ||
$ (cd /run/media/{{#var:EMMC_ROOTFS_DEV}}{{#var:EMMC_ROOTFS_PARTITION_NUM}}/boot; ln -fs {{#var:DEFAULT_DTB_EMMC}} {{#var:DEFAULT_DTB}} | {{#ifeq: {{#var:HARDWARE_NAME}} | DART-MX8M |$ (cd /run/media/{{#var:EMMC_ROOTFS_DEV}}{{#var:EMMC_ROOTFS_PARTITION_NUM}}/boot; ln -fs {{#var:DEFAULT_DTB_EMMC}} {{#var:DEFAULT_DTB}})|}} | ||
$ sync | $ sync | ||
$ umount /run/media/{{#var:EMMC_ROOTFS_DEV}}{{#var:EMMC_ROOTFS_PARTITION_NUM}} | $ umount /run/media/{{#var:EMMC_ROOTFS_DEV}}{{#var:EMMC_ROOTFS_PARTITION_NUM}} | ||
| | |#default= | ||
Delete current data on eMMC: | Delete current data on eMMC: | ||
$ dd if=/dev/zero of=${node}p1 bs=1024 count=1024 | $ dd if=/dev/zero of=${node}p1 bs=1024 count=1024 | ||
| 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/ | 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:
- Visit variwiki.com
- Select your SoM
- 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:
- Note: If you followed the Create an extended SD card steps, the flashing scripts and all relevant binaries are already included in your SD card, and the below commands are redundant!
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.