Boot loader optimizations with UUU function reserved

[Mingheng]

Hi

We want to do optimizations following the document https://docs.nxp.com/bundle/AN14093/

But we find we couldn't use UUU to download image to the board with IMX8M Plus.

Here is the message on console when running UUU command, the SPL would only check the MMC device(e.g. MMC1_BOOT -> BOOT_DEVICE_MMC1) but USB board device(USB_BOOT -> BOOT_DEVICE_BOARD) 

Look forward to your help

Best regards

MIngheng

[elena_popa]

Hi @Mingheng 

Please refer to the solution described in this ticket: https://community.nxp.com/t5/i-MX-Processors/How-to-load-Falcon-mode-image-to-emmc-on-imx8mplus-dev-... Following those steps you will be able to write the image on the eMMC.

Thanks,

Elena

[lapohab]

This is a very simple reason: UUU burning relies on the fastboot function of u-boot, while Falcon mode has no u-boot, only SPL. 

 

[danielchen]

Hi

I would suggest you  test whether the same u-boot image can load successfully on an SD card  without UUU tool?

Regards

Daniel

[lapohab]

I don't think you fully understand what Falcon mode is and what the question of Mingheng is about.