imx8mp: Flashing U-Boot into eMMC hardware partition via UUU

Hi,

I am using an imx8mp-evk board and I can flash the U-Boot into the eMMC hardware partition 0 by running:

=> tftpboot $loadaddr flash.bin => setexpr blkcnt $filesize + 0x1ff && setexpr blkcnt $blkcnt / 0x200 => mmc dev 2 1 => mmc write $loadaddr 0 $blkcnt

Now I want to do the same via UUU.

I tried to create a script called emmc_flash:

uuu_version 1.5.21

SDPS: boot -f flash.bin SDPS: done FB: ucmd setenv fastboot_dev mmc FB: ucmd mmc dev 2 1 FB: flash bootloader flash.bin FB: Done

Then on the PC: uuu emmc_flash

U-Boot is loaded to RAM, but the eMMC hardware partition is not programmed.

What is the correct script for doing this?

Any suggestions?

Thanks