Debian Edit Modify Build and Flash U-Boot: Difference between revisions

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<br>
<br>


== Making Changes to U-Boot ==
== Making changes to U-Boot ==
  $ cd {{#var:BUILD_FOLDER}}/src/uboot-imx
  $ cd {{#var:BUILD_FOLDER}}/src/uboot-imx
  $ gedit board/variscite/{{#var:U-BOOT_BOARD_NAME}}/{{#var:U-BOOT_BOARD_NAME}}.c
  $ gedit board/variscite/{{#var:U-BOOT_BOARD_NAME}}/{{#var:U-BOOT_BOARD_NAME}}.c
  $ gedit include/configs/{{#var:U-BOOT_BOARD_NAME}}.h
  $ gedit include/configs/{{#var:U-BOOT_BOARD_NAME}}.h


For example, we want to change the default environment variable,  
For example, we want to change the default environment variable,
  "netargs=setenv bootargs ${jh_clk} console=${console} " \
  "netargs=setenv bootargs ${jh_clk} console=${console} " \
  "root=/dev/nfs ${cma_size} " \
  "root=/dev/nfs ${cma_size} " \
  "ip=dhcp nfsroot=${serverip}:${nfsroot},v3,tcp\0" \
  "ip=dhcp nfsroot=${serverip}:${nfsroot},v3,tcp\0" \
To
to
  "netargs=setenv bootargs ${jh_clk} console=${console} " \
  "netargs=setenv bootargs ${jh_clk} console=${console} " \
  "root=/dev/nfs ${cma_size} " \
  "root=/dev/nfs ${cma_size} " \
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Here above example sets the serverip to 192.168.0.34.
Here above example sets the serverip to 192.168.0.34.


== Building Bootloader ==
== Building bootloader ==
To build a bootloader run below commands on host machine.  
To build a bootloader run below commands on host machine.  
  $ cd {{#var:BUILD_FOLDER}}
  $ cd {{#var:BUILD_FOLDER}}
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|}}|}}
|}}|}}


== Flashing New Bootloader to Target ==
== Flashing new bootloader to target ==


=== Flashing New Bootloader to target eMMC via network ===
=== Flashing new bootloader to target eMMC via network ===
Transfer the newly created bootloader file   
Transfer the newly created bootloader file   
{{#ifeq: {{#var:SOC_SERIES}}|imx8|
{{#ifeq: {{#var:SOC_SERIES}}|imx8|
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From
From
  {{#var:BUILD_FOLDER}}/output/ to running target to flash it on the eMMC.  
  {{#var:BUILD_FOLDER}}/output/ to running target to flash it on the eMMC.  
For example <br>
For example: <br>
{{#ifeq: {{#var:SOC_SERIES}}|imx8|
{{#ifeq: {{#var:SOC_SERIES}}|imx8|
  <br>
  <br>
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}}  
}}  


Change 192.168.0.36 to your target board IP.<br>
Change 192.168.0.36 to your target board IP.
On target run below commands:<br>
 
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>
  $ sudo dd if=/tmp/{{#var:U-BOOT_SD_IMAGE_NAME}}  of=/dev/{{#var:EMMC_ROOTFS_DEV}} bs=1K seek={{#var:U-BOOT_OFFSET}} conv=fsync
  $ 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>
  $ sudo dd if={{#var:U-BOOT_IMAGE_NAME}} of=/dev/{{#var:EMMC_ROOTFS_DEV}} bs=1K seek=1; sync
  $ dd if={{#var:U-BOOT_IMAGE_NAME}} of=/dev/{{#var:EMMC_ROOTFS_DEV}} bs=1K seek=1; sync
  |<br>
  |<br>
  $ sudo dd if=/tmp/SPL of=/dev/{{#var:EMMC_ROOTFS_DEV}} bs=1K seek=1; sync
  $ dd if=/tmp/SPL of=/dev/{{#var:EMMC_ROOTFS_DEV}} bs=1K seek=1; sync
  $ sudo dd if=/tmp/u-boot.img of=/dev/{{#var:EMMC_ROOTFS_DEV}} bs=1K seek=69; sync
  $ dd if=/tmp/u-boot.img of=/dev/{{#var:EMMC_ROOTFS_DEV}} bs=1K seek=69; sync
}}
}}
}}
}}


=== Flashing New Bootloader to SD card ===
=== 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.  
To flash the newly created bootloader on the SD card if you are running your entire OS from SD card.  
{{#ifeq: {{#var:SOC_SERIES}}|imx8|
{{#ifeq: {{#var:SOC_SERIES}}|imx8|
  <br>
  <br>
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}}
}}


=== Flashing using recovery sdcard ===
=== 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:
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:
<br>
<br>
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  $ sudo cp u-boot.img /media/rootfs/opt/images/Debian/
  $ sudo cp u-boot.img /media/rootfs/opt/images/Debian/
}}
}}
And eject the SD card gracefully from host machine.
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:

  1. Visit variwiki.com
  2. Select your SoM
  3. 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)
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This page was last edited on 27 April 2023, at 20:26.

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