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

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:

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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)

@@ Line 1: / Line 1: @@
-<!-- Set release according to "release" parameter in URL and use MORTY_V1.0_DART-6UL as default
+<!-- Set release according to "release" parameter in URL and use RELEASE_BUSTER_V1.0_DART-MX8M-MINI as default
---> {{#vardefine:RELEASE_PARAM|{{#urlget:release}}}} <!--
+--> {{INIT_RELEASE_PARAM|RELEASE_BUSTER_V1.0_DART-MX8M-MINI}}<!--
---> {{#lst:Debian_Platform_Customization|{{#var:RELEASE_PARAM|RELEASE_BUSTER_V1.0_DART-MX8M-MINI}}}} <!--
+--> {{#lst:Debian_Platform_Customization|{{#var:RELEASE_PARAM}}}} <!--
 --> {{PageHeader|{{#var:HARDWARE_NAME}} - Debian U-Boot Customization}} {{DocImage|category1={{#var:HARDWARE_NAME}}|category2=Debian}} __toc__
 <br>
-== Making Changes to U-Boot ==
+== Making changes to U-Boot ==
   $ cd {{#var:BUILD_FOLDER}}/src/uboot-imx
   $ gedit board/variscite/{{#var:U-BOOT_BOARD_NAME}}/{{#var:U-BOOT_BOARD_NAME}}.c
   $ gedit include/configs/{{#var:U-BOOT_BOARD_NAME}}.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
+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,
+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.
   $ cd {{#var:BUILD_FOLDER}}
@@ Line 31: / Line 31: @@
 |}}|}}
-== 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
 {{#ifeq: {{#var:SOC_SERIES}}|imx8|
@@ Line 43: / Line 43: @@
 From
   {{#var:BUILD_FOLDER}}/output/ to running target to flash it on the eMMC.
-For example <br>
+For example: <br>
 {{#ifeq: {{#var:SOC_SERIES}}|imx8|
   <br>
-  $scp {{#var:BUILD_FOLDER}}/output/{{#var:U-BOOT_SD_IMAGE_NAME}} root@192.168.0.36:/tmp/
+  $ scp {{#var:BUILD_FOLDER}}/output/{{#var:U-BOOT_SD_IMAGE_NAME}} root@192.168.0.36:/tmp/
   |
   <br>
-  $scp {{#var:BUILD_FOLDER}}/output/SPL root@192.168.0.36:/tmp/
+  $ scp {{#var:BUILD_FOLDER}}/output/SPL root@192.168.0.36:/tmp/
-  $scp {{#var:BUILD_FOLDER}}/output/u-boot.img root@192.168.0.36:/tmp/
+  $ scp {{#var:BUILD_FOLDER}}/output/u-boot.img root@192.168.0.36:/tmp/
 }}
 Change 192.168.0.36 to your target board IP.
-On target run below commands:
+Login via ssh on the target with the user 'root', and run the below commands':<br>
 {{#ifeq: {{#var:SOC_SERIES}}|imx8|
   <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
 |<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>
-  $ 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|
   <br>
@@ Line 85: / Line 86: @@
 }}
-=== 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:
 <br>
@@ Line 94: / Line 95: @@
   $ 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]])}}