i.MX ProcessorsのトピックRe: Cannot flash iMX7D with uuu

Cannot flash iMX7D with uuu

blz — Wed, 09 Apr 2025 14:00:02 GMT

I'm currently working on migrating an ucl2.xml file to program the board with uuu in linux. Right now I have the initial part working:

SPD: dcd -f u-boot.imx
SPD: write -f "u-boot.imx" -ivt 0
SPD: write -f "zImage" -addr 0x80800000
SPD: write -f "initramfs" -addr 0x83800000
SPD: write -f "device_tree_file" -addr 0x83000000
SPD: jump -f "u-boot.imx" -ivt 0

However, after jumping to the image, I cannot send commands over FBK. I noticed that the vid: 0x066F and pid: 0x37FF. The vid is listed in uuu -v but not the pid.

I don't believe I'm allowed to modify the initramfs nor do I think that's the issue. I don't believe I can SSH to the device after the fact. Is this a dead end with uuu? Thanks for any help.

Re: Cannot flash iMX7D with uuu

AldoG — Thu, 10 Apr 2025 21:14:01 GMT

Hello,

Maybe it is not needed to fully translate your script, you may use the sample we have using kernel:
https://github.com/nxp-imx/mfgtools/wiki/Sample-scripts#burn-yocto-image-to-emmc-by-linux-kernel

Best regards/Saludos,
Aldo.

Re: Cannot flash iMX7D with uuu

blz — Mon, 14 Apr 2025 12:31:38 GMT

Hi Aldo,

I don't think the script will work given what I have. I'd like to make a correction though earlier, I had suspected that the initramfs was irrelevant and I said I had to use the old one which isn't the case.

I had actually opened a github issue to confirm the initramfs: https://github.com/nxp-imx/mfgtools/issues/471

That being said, I'm going through the documentation to flash the board with yocto. Here's what I've done:

I've setup the repo like so:

repo init -u https://github.com/nxp-imx/imx-manifest\n-
b imx-linux-styhead -m imx-6.12.3-1.0.0.xml

Previously, I had three files u-boot.imx, zImage, and fsl-image-mfgtool-initramfs.

I can make the initramfs with

bitbake fsl-image-mfgtool-initramfs

but I'm not sure how to make the corresponding u-boot.imx and zImage. My understanding is that the u-boot.imx is dependent on the type of boot-media. For example if you were booting off of the emmc storage or an SD card. I think the board is booting off of emmc or QSPI flash. Is there a way for the u-boot.imx to be able to support both?

I'm new to the Yocto project and working with embedded Linux on these boards so thank you for your patience!

Best,

Benjamin

Re: Cannot flash iMX7D with uuu

AldoG — Mon, 14 Apr 2025 19:04:10 GMT

Hello,

It may not possible to have an all in one uboot image, you will need to have one for each target boot media, for eMMC/SD it is possible since both are almos the same.

For doing this using yocto you may use the following command:
$ echo "UBOOT_CONFIG = \"<boot_media>\"" >> conf/local.conf

where boot media can be any of the following (imx7D sabresd):
sd epdc qspi1 nand sd-optee

You may here build normally which should create all images needed, both uboot and kernel, in case you want to build them separetedly you may use the following commands:

For uboot:
$ MACHINE=imx7dsabresd bitbake u-boot-imx
For kernel image (zImage):
$ MACHINE=imx7dsabresd bitbake linux-imx

Best regards/Saludos,
Aldo.