Failed to flash uboot on IMX6UL

[abhijeet_pawar]

Hello,

I'm using an custom board of IMX6ul with UART &  USB connection (No JTAG). So i'm using mfgtool for flashing of u-boot-usb.imx image for loading u-boot image into RAM. once it loaded i'm using tftp for flashing the final uboot & kernel image & able to do it successfully. After some iteration of testing my board is stopped responding to mfgtool.

Also in console i'm not getting any messages/logs (blank). In mfgtool it shows "Loading Uboot " after start it hangs there.

attaching a log file of mfgtool.

i tried same with imx usb loader but their i'm getting the error message of "!!perform_dcd returned -1" after enabling debug messages.

Can somebody help me to solve this issue.

[igorpadykov]

Hi  Abhijeet

if board stopped working after some iterations reason may be

software changes from previous builds. Suggest to rebuild image from scratch.

Best regards
igor
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[abhijeet_pawar]

Hello igorpadykov,

Actually iteration testing was flashing the same images again & again. so i don't see any problem with images. it was same used on other boards that are working fine.

At least RAM image should work with board. so i can try to read status registers & figure out the problem.

so can you give some pointers on how can i read register (without jtag as there is no connection)?

Thanks,

Abhijeet Pawar

[igorpadykov]

Hi Abhijeet

registers can be read using memtool

memtool\test - imx-test - i.MX Driver Test Application Software 

Best regards
igor

[abhijeet_pawar]

Hello igorpadykov,

Can you please elaborate me how this tool helps me to read registers. As i said earlier, my board is not responding.There is no uboot message & no kernel prompt im getting. as per my understanding this memtool has to be run on kernel prompt.

Why i want to read register is to ensure that the board is not locked.

Thanks,

Abhijeet Pawar.

[igorpadykov]

Hi Abhijeet

to read registers one can also use jtag.

Best regards
igor

[abhijeet_pawar]

Hello igorpadykov,

I have downloaded NXP ddr test tool & i run ddr test script available in same folder for imx6ul. I got message of "ERROR write dcd failed". When i retried it gives "ERROR rom_check_hab() failed. Please make sure board connected and in serial download mode".

So can you please give some pointers on this. As there is limitation on board side so i cant debug it using jtag so was trying to find out some solution with various tools. 

hope you get it.

Thanks,

Abhijeet Pawar

[igorpadykov]

may be suggested to check hardware using

Hardware Development Guide for the i.MX 6UltraLite Applications Processor

For ddr tool issue suggest to create new thread.

Best regards
igor