Debian Edit Modify Build and Flash U-Boot: Difference between revisions
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Change 192.168.0.36 to your target board IP. | Change 192.168.0.36 to your target board IP. | ||
Login via ssh on the target with the user 'root', and run the below commands':<br> | |||
{{#ifeq: {{#var:SOC_SERIES}}|imx8| | {{#ifeq: {{#var:SOC_SERIES}}|imx8| | ||
<br> | <br> | ||
$ | $ dd if=/tmp/{{#var:U-BOOT_SD_IMAGE_NAME}} of=/dev/{{#var:EMMC_ROOTFS_DEV}} bs=1K seek={{#var:U-BOOT_OFFSET}} conv=fsync | ||
| | | | ||
{{#ifeq: {{#var:SPL_SD_IMAGE_NAME}} | N/A | {{#ifeq: {{#var:SPL_SD_IMAGE_NAME}} | N/A | ||
|<br> | |<br> | ||
$ | $ dd if={{#var:U-BOOT_IMAGE_NAME}} of=/dev/{{#var:EMMC_ROOTFS_DEV}} bs=1K seek=1; sync | ||
|<br> | |<br> | ||
$ | $ dd if=/tmp/SPL of=/dev/{{#var:EMMC_ROOTFS_DEV}} bs=1K seek=1; sync | ||
$ | $ dd if=/tmp/u-boot.img of=/dev/{{#var:EMMC_ROOTFS_DEV}} bs=1K seek=69; sync | ||
}} | }} | ||
}} | }} | ||
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$ sudo cp u-boot.img /media/rootfs/opt/images/Debian/ | $ sudo cp u-boot.img /media/rootfs/opt/images/Debian/ | ||
}} | }} | ||
Eject the SD card gracefully from the host machine, and {{varlink|Debian_Recovery_SD_card#Recover_NAND_flash.2FeMMC|{{#var:RELEASE_LINK}}|flash the internal on-SOM storage using the recovery SD card}}. | |||
{{Note|Note: If you manually upgrade an existing U-Boot, and you have an old environment saved, it is a good idea to reset your environment to the new default (see [[U-Boot 4.1.15 features#Environment handling commands|Environment handling commands]])}} | {{Note|Note: If you manually upgrade an existing U-Boot, and you have an old environment saved, it is a good idea to reset your environment to the new default (see [[U-Boot 4.1.15 features#Environment handling commands|Environment handling commands]])}} | ||
Latest revision as of 20:26, 27 April 2023
Warning: This page is designed to be used with a 'release' URL parameter.
This page is using the default release RELEASE_BUSTER_V1.0_DART-MX8M-MINI.
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
DART-MX8M-MINI - Debian U-Boot Customization
Making changes to U-Boot
$ cd ~/var_mx8mm_dart_debian_buster/src/uboot-imx $ gedit board/variscite/mx8mm_var_dart/mx8mm_var_dart.c $ gedit include/configs/mx8mm_var_dart.h
For example, we want to change the default environment variable,
"netargs=setenv bootargs ${jh_clk} console=${console} " \
"root=/dev/nfs ${cma_size} " \
"ip=dhcp nfsroot=${serverip}:${nfsroot},v3,tcp\0" \
to
"netargs=setenv bootargs ${jh_clk} console=${console} " \
"root=/dev/nfs ${cma_size} " \
"ip=dhcp serverip=192.168.0.34 nfsroot=${serverip}:${nfsroot},v3,tcp\0" \
Here above example sets the serverip to 192.168.0.34.
Building bootloader
To build a bootloader run below commands on host machine.
$ cd ~/var_mx8mm_dart_debian_buster $ sudo MACHINE=imx8mm-var-dart ./var_make_debian.sh -c bootloader
Flashing new bootloader to target
Flashing new bootloader to target eMMC via network
Transfer the newly created bootloader file imx-boot-sd.bin
From
~/var_mx8mm_dart_debian_buster/output/ to running target to flash it on the eMMC.
For example:
$ scp ~/var_mx8mm_dart_debian_buster/output/imx-boot-sd.bin root@192.168.0.36:/tmp/
Change 192.168.0.36 to your target board IP.
Login via ssh on the target with the user 'root', and run the below commands':
$ dd if=/tmp/imx-boot-sd.bin of=/dev/mmcblk2 bs=1K seek=33 conv=fsync
Flashing new bootloader to SD card
To flash the newly created bootloader on the SD card if you are running your entire OS from SD card.
$ sudo dd if=imx-boot-sd.bin of=/dev/sdX bs=1K seek=33 conv=fsync
Flashing using recovery SD card
If you want to use our recovery SD card to flash the built U-Boot to NAND flash/eMMC, then copy it to the appropriate location in the SD card:
$ sudo cp imx-boot-sd.bin /media/rootfs/opt/images/Debian/
Eject the SD card gracefully from the host machine, and flash the internal on-SOM storage using the recovery SD card.
Note: If you manually upgrade an existing U-Boot, and you have an old environment saved, it is a good idea to reset your environment to the new default (see Environment handling commands)