2022030_en-US

[#1]

Question on "Getting Started with the i.MX 8M Nano UltraLite EVK"

This is a very basic question, but it seems to be holding me up, so your help is much appreciated:  How can I use the UUU command to program an SD Card, as opposed to eMMC?  Following are the details...

I'm following the instructions for Section 2 of Getting Started with the i.MX 8M Nano UltraLite EVK. One of the sentences in the Overview states:

For this getting started guide, only a few methods to transfer the Linux BSP image to an SD card are listed.

Based on this sentence, I would assume that if I followed the instructions as shown, the end result should be that:

1. I will have written an image to the SD Card.
2. If I boot with the SW1101 switches set to 1100xxxx, then it will boot from the SD Card using the image I wrote.

What I'm finding, however, is that even if I follow the instructions verbatim, the SD Card doesn't get programmed, but the eMMC does.  I've even tried programming an older version and when I do, that version appears when I boot from the eMMC, and the SD Card still doesn't work.

Here are some of the specifics:

1. To put the board in programming boot mode, I set SW1101 to: 1000xxx
2. To put the board in SD Card boot mode, I set SW1101 to: 1100xxxx
3. To put the board in eMMC boot mode, I set SW1101 to: 0100xxxx
4. To program v6.6.52 I use the following UUU command:
   1. uuu LF_v6.6.52-2.2.0_images_IMX8MNDDR3LEVK.zip
5. To program v6.1.55, I use the following UUU command:
   1. uuu LF_v6.1.55-2.2.2_images_IMX8MNDDR3LEVK.zip
6. After using UUU, it always indicates that it was successful (Success 1    Failure 0)

Is it possible that the uuu command needs to be run with different parameters to tell it to program the SD Card instead of the eMMC?

Thanks much

Re: Question on "Getting Started with the i.MX 8M Nano UltraLite EVK"

I've figured out the issue.  Despite all of the reassurances that the instructions describe how to program the SD Card:

1. 02 - Embedded Linux
   1. "For this getting started guide, only a few methods to transfer the Linux BSP image to an SD card are listed."
   2. When it finishes, turn off the board, and consult Boot switch setup to configure the board to boot from the SDcard.
2. 03 - MCUXpresso SDK
   1. Following the steps from section 2 - Embedded Linux, prepare an SD card with a pre-built U-Boot + Linux image from the Linux BSP package for the i.MX 8M Nano UL processor.

The directions don't actually describe how to write an image to the SD Card.  This is because the instructions in this section state that you should run the following command:

uuu imagefilename.zip

However, the images provided on the Linux Download Page contain a "uuu.auto" file that is configured to write the image to eMMC rather than to the SD Card, and so you can't use the command above to write the image to the SD Card using these images.

Instead, you need to extract the contents of the image file, and then you can use the following command:

uuu -b sd_all bootloader image

Specifically, the following command worked for me:

uuu -b sd_all imx-boot-imx8mnddr3levk-sd.bin-flash_ddr3l_evk imx-image-full-imx8mnddr3levk.wic