TQMa91xxCA - YOCTO Linux BSP documentation

The UUU (Universal Update Utility is an open source programm provided by NXP, it is the successor of NXP's MFG Tools, intended to download and execute code on i.MX SoC family via the Serial Download Protocol (SDP). Documentation, source code and prebuild releases are available via the NXP mfgtools github repository.

Prerequisites

1. Download the latest release from Universal Update Utility repository or build it from source

• Prebuild releases
• Build from source

2. TQMa91xxCA BSP built following the BSP quickstart instructions.

Download a Prebuild UUU Release Version

A prebuild UUU release version can be downloaded from the UUU git repository.

Building the Universal Update Utility from source

The Universal Update Utility (UUU) tool can be compiled manually. The build instructions for Linux, Windows are available in the UUU documentation:

• Linux
• Windows

U-Boot Binary

A U-Boot binary with the U-Boot configuration mfgtool is required to use the UUU. This particular U-Boot will be built during the TQMa91xxCA Yocto BSP build process and is located in the build directory deploy folder named imx-boot-tqma91xx-mba91xxca-mfgtool.bin-flash_singleboot.

Usage

Prepare Host Computer

For the sake of siplicity, copy the following components to a new folder e.g. in your home directory:

• UUU binary (manually compiled or prebuilt release)
• U-Boot binary with UUU configuration imx-boot-tqma91xx-mba91xxca-mfgtool.bin-flash_singleboot
• SD / eMMC image for example the default image tq-image-weston-debug-tqma91xx-mba91xxca.rootfs-20250422082924.wic

The following commands are executed in the folder containing the tool and the binaries.

Prepare STKa91xCA

• Set the STKa91xCA DIP switches to Serial Downloader Mode (See DIP-Switch Settings)
• Connect STKa91xCA via connector X22 to the Host Computer

List detected devices

After connecting the kit, it should be automatically detected when it is in serial downloader mode. Run the following command to list all detected devices:

uuu -lsusb

Start U-Boot over Serial Downloader

To load the U-boot binary into the RAM and start it from there use the command below:

uuu <u-boot binary>

Example for the STKa91xCA:

uuu imx-boot-tqma91xx-mba91xxca-mfgtool.bin-flash_singleboot

Program U-Boot over Serial Downloader

Use the following command to program a U-Boot binary into the eMMC.

uuu -b emmc <u-boot binary>

Example for the STKa91xCA:

uuu -b emmc imx-boot-tqma91xx-mba91xxca-mfgtool.bin-flash_singleboot

Program .wic image over Serial Downloader

Follow the command below to load the mfgtool U-Boot and write an image onto the @mod_name@ eMMC afterwards.

uuu -b emmc_all <u-boot binary> <wic-image>

Example for the STKa91xCA:

uuu -b emmc_all imx-boot-tqma91xx-mba91xxca-mfgtool.bin-flash_singleboot tq-image-weston-debug-tqma91xx-mba91xxca.rootfs-20250422082924.wic

The Image can be simply written to the SD Card by using the dd shell command in Linux:

$ cd <path to your image>
$ sudo dd if=tq-image-weston-debug-tqma91xx-mba91xxca.rootfs.wic of=/dev/sdc bs=1M conv=fsync #Assuming the SD card is assigned to /dev/sdc

To identify the SD card in Linux the shell command dmesg can be used:

1. Open a new terminal
2. Execute the following command without plugged SD Card

    $ dmesg | tail -n 15

3. Insert SD Card and wait a few seconds
4. Run the command from step two again

$ dmesg | tail -n 15 
 #plug in SD Card into the reader
$ dmesg | tail -n 15