UUU with iMX95

[stoeanifm]

Hi,
I want to download and run U-Boot on a iMX95 based system.
I created this script cmd.lst:

# {
SDPS: boot -f flash.bin
SDPS: done
SDPV: delay 1000
SDPV: write -f flash.bin -skipspl
SDPV: jump
SDPV: done
# }

If I follow this commands step by step on command line it works fine. 
But if I call
=> sudo /usr/bin/uuu -v -b ./cmd.lst 

it hangs

Wait for Known USB Device Appear...
New USB Device Attached at 1:41-636B3EF4AB264648
1:41-636B3EF4AB264648>Start Cmd:SDPS: boot -f flash.bin
100%1:41-636B3EF4AB264648>Okay (3.007s)
1:41-636B3EF4AB264648>Start Cmd:SDPS: done
1:41-636B3EF4AB264648>Okay (0s)

Is it not allowed to do this steps within one command list?
Or what is wrong with this command list?

[yipingwang]

Yes, SDPS and SDPV steps can be in one UUU command list. For i.MX95 the intended sequence is: first SDPS: boot -f flash.bin starts SPL, then SDPV: write -f flash.bin -skipspl and SDPV: jump complete/start U-Boot . The script examples I found use the same combined SDPS→SDPV flow without an SDPS: done between them .

What is wrong in your case is most likely the done placement, and possibly the way you invoke the script:

uuu_version 1.5.233

SDPS: boot -f flash.bin

SDPV: delay 1000

SDPV: write -f flash.bin -skipspl

SDPV: jump

Run it as a custom script file directly:

sudo /usr/bin/uuu -v ./cmd.lst

not as:

sudo /usr/bin/uuu -v -b ./cmd.lst

The -b option is documented for UUU built-in scripts such as sd , emmc , sd_all , or emmc_all , while a custom script file is normally passed directly to uuu . Also, done is described as the last command for the whole flow, so putting SDPS: done immediately after the first boot stage can make UUU stop that stage and wait for the next known USB device instead of continuing cleanly into the SDPV stage .

So I would change your file from:

SDPS: boot -f flash.bin

SDPS: done

SDPV: delay 1000

SDPV: write -f flash.bin -skipspl

SDPV: jump

SDPV: done

to:

uuu_version 1.5.233

SDPS: boot -f flash.bin

SDPV: delay 1000

SDPV: write -f flash.bin -skipspl

SDPV: jump

If it still waits at the SDPS→SDPV transition, try a newer UUU release; one i.MX95 report specifically recommends moving from uuu_1.5.201 to uuu_1.5.233 for hangs at 100% . You can also increase the stage-switch wait timeout with -T , which is the timeout for waiting for the next known USB device at a stage switch .

Use one script, but remove the intermediate done lines and run the file directly with uuu -v ./cmd.lst ; then update UUU or increase -T only if the board still does not re-enumerate into the SDPV stage.

[stoeanifm]

Hi and thank you@yipingwang 
Please excuse the late feedback....

When I changed the cmd-lst to:
SDPS: boot -f flash.bin
SDPV: delay 1000
SDPV: write -f flash.bin -skipspl
SDPV: jump
SDPV: done

and then switched to uuu_1.5.233 it worked fine.

But the call must be:
=> ./uuu -v -b ./cmd.lst

With
=> ./uuu -v ./cmd.lst
it seems uuu try to load the cmd.lst as a botloader binary.
It returns:
New USB Device Attached at 3:5-636B3EF4AB264648
3:5-636B3EF4AB264648>Start Cmd:SDPS: boot -f "./cmd.lst"