UUU to write the .img image which is generated from SD card into emmc on imx8m plus SOM board

[Mohan_SK]

We have a Linux image (.img format) created from the SD card. It has two images .img1 for bootfs and .img2 for rootfs. I want to right this into emmc directly instead from SD card. So, I thought to use the uuu tool and I could not find any suitable document or information on how to do so. All the info's are using .bin bootloader and .sdcard root formats. However, when I tried to run the following command "uuu.exe -b emmc_all image-name.img" , It throws an error saying it could not find .sdcard file. Any help on this to get it working will be highly appreciated

[nxf63675]

Hi @Mohan_SK,

Which version of our BSP are you using? Usually, for our boards, we use prebuilt images, or if you are trying to do it for a custom one you can build a custom image on Linux using Yocto, more info could be found on the next link https://www.nxp.com/design/software/embedded-software/i-mx-software/embedded-linux-for-i-mx-applicat...

As telling you this because I do not know how to convert the .img to the formats that UUU support, so my recommendation is build a new image for your board using Yocto.

Regards,

Israel.

[nxf63675]

Hi @Mohan_SK,

Already answer you on your internal ticket, if you need more support on this please let me know.

Regards,

Israel,

[Mohan_SK]

Thanks for the info Israel,

I don't have the image format you mentioned. This custom image is created from an SD card using win32_Disk_Image tools and in the below screenshot, we can see the image and its sub image partitions.

.img1 -> bootfs

.img2 -> rootfs 

I am not sure if I can convert from .img to .sdcard or .bin

-Mohan

[BiyongSUN]

If you don't mind a very ugly workaround, here you can try. 

dd if=custom.12.7.img of=flash.dump.bin skip=32 bs=1k count=4096

1. uuu -v SDPS: boot -f flash.dump.bin
you will get an error, but igore it. It is because, the bootloard dump from sdcard mirror, the size mismatch the size information in the boot header.

2. uuu -v -b emmc_all flash.dump.bin custom.12.7.img

Here is test screenshot for i.MX8MP EVK binary demo image.

imx-image-multimedia-imx8mpevk.wic is the sdcard mirror. Just like custom.12.7.img

dd if=imx-image-multimedia-imx8mpevk.wic of=flash.dump.bin skip=32 bs=1k count=4096
uuu -v SDPS: boot -f flash.dump.bin
uuu -v -b emmc_all flash.dump.bin imx-image-multimedia-imx8mpevk.wic

[Mohan_SK]

Hi Isreal,

Appreciate your support. I tried out the workaround and I could write into the emmc now. But the device is not yet booting. Below is the snapshot of the serial console for your reference.

The boot switch is set to boot from emmc and uboot setenv variables are also set. Let me know if I am missing something

-Mohan

[BiyongSUN]

1. Please make sure you use the command to do flash. 

uuu -v -b emmc_all flash.dump.bin custom.12.7.img

2. use the u-boot command to check 

mmc info

mmc list

ext4ls mmc ${mmcdev}:${mmcpart}

ext4ls mmc 0:1

ext4ls mmc 1:1

ext4ls mmc 2:1

.......

[nxf63675]

Hi Mohan,

Is unfortunate to say that we do not support that tool as we do not support I can not help you with that, sorry for the problems this causes you, as I mention before you need to compile a custom image using the tools that we can help you with.

Regards,

Israel.