Ilko: Initial creation

2024-02-06T09:49:28Z

Initial creation

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{{#vardefine:HARDWARE_NAME|iMX8MP-COMPACT-CM}}
{{#vardefine:UBOOT_BRANCH|lf_v2023.04}}
{{#vardefine:DEFCONFIG_NAME|imx8mp_cm_defconfig}}
[[File:iMX8MP-CM-top.png|thumb]]
== Overview ==
The U-Boot bootloader is used for low-level initialization and operating system loading.

== Setting Boot mode ==

{| class="wikitable"
|+ Boot mode setting on carrier board
|-
! BOOT !! J4:1-2 !! J4:3-4 !! J4:5-6 !! J4:7-8
|-
| Cortex-A53 Serial Downloader || close || open || open || open
|-
| Cortex-A53, eMMC || open || close || open || open
|}

== Terminal Setup ==
The carrier board connects the host PC using the micro-B USB connector (J6).<br>
Common serial communication programs such as Minicom, HyperTerminal, Tera Term, or PuTTY can be used.<br>
The {{#var:HARDWARE_NAME}} board uses the second port for the Arm Cortex-A cores console.
== Building U-BOOT for {{#var:HARDWARE_NAME}} ==
This U-BOOT is based on https://github.com/nxp-imx/uboot-imx, branch {{#var:UBOOT_BRANCH}}

=== Set up the cross-compiler and CPU architecture ===
$ export ARCH=arm64
$ export CROSS_COMPILE=/opt/cross/aarch64-ronetix-linux-11.1/bin/aarch64-ronetix-linux-gnu-

A cross-compiler can be downloaded from here:
http://download.ronetix.at/toolchains/crosstool-ng

=== Clone the latest revision of the repo ===
$ git clone https://github.com/ronetix/u-boot.git uboot-imx --depth=1 -b {{#var:UBOOT_BRANCH}}
$ cd uboot-imx

=== Configure ===
$ make {{#var:DEFCONFIG_NAME}}

=== Build ===
$ make

=== Create IMX image ===
Create a new Firmware package '''flash.bin''' that contains SPL, U-Boot, Arm Trusted Firmware, Sentinel
Firmware, DDR PHY Firmware.<br>

$ source ./tools/imx_build_firmware.sh imx8mp

=== Build Results ===
{| class="wikitable"
|-
! scope="col" | File Name
! scope="col" | Description
|-
| style="padding: 5px;"| u-boot
| style="padding: 5px;"| U-BOOT ELF image used for JTAG debugging
|-
| style="padding: 5px;"| u-boot-dtb.bin
| style="padding: 5px;"| U-BOOT image with DTB
|-
| style="padding: 5px;"| ./imx-mkimage/iMX8M/flash.bin
| style="padding: 5px;"| IMX bootloader
|}

== Programming the IMX image ==
This section describes how to write the bootloader into the eMMC using UUU.<br>

=== Universal update utility ===
The Universal Update Utility (UUU) runs on a Windows or Linux OS host and is used to download images to devices on an i.MX board.

==== Downloading UUU ====
Download UUU version 1.5.21 or later from https://github.com/nxp-imx/mfgtools/releases

==== Connect USB ports ====
Follow the instructions below:
* Connect a USB cable from a computer to the J7, port USB-3 (Type C) port on the carrier board for download link.
* Connect a USB cable from J6, port UART-DBG (Micro-AB) port to the computer for console output.
* Open a Terminal emulator program
* Set the boot mode to "Cortex-A53 Serial Downloader", see [[#Setting Boot mode]]

=== Write flash.bin into eMMC ===

$ cd ./imx-mkimage/iMX8M
$ wget http://download.ronetix.at/boards/doc/i.MX8MP-COMPACT-CM/tools/u-boot.uuu
$ uuu u-boot.uuu


{{SeeAlso}}

iMX8MP-COMPACT-CM U-Boot - Revision history

Ilko: Initial creation