AM6421: AM6421 Custom Board Stuck on Cold boot error while Booting from eMMC

Yogesh Hegde

Part Number: AM6421

Tool/software:

Hello,

I am trying to boot my AM6421 custom board from eMMC. For this I loaded a working image into the SD card, stopped the boot process at u-boot and then loaded the tiboot3.in tispl.bin and uboot.img into the eMMC, following the steps in section 3.1.1.5.5 of the TI documentation: software-dl.ti.com/.../UG-Memory.html

All steps execute successfully without errors, but after rebooting, the board gets stuck at the following screen:

eMMC partition info and other details used are given below:

Could you help diagnose why the boot process is failing at this stage? Are there additional configurations or debug steps I should try? Can you point me in the right direction?

Thanks!

7 months ago

0 Bin Liu 7 months ago

TI__Guru**** 171491 points

Hi Yogesh,

Please check the instruction below to see if it will resolve the issue.

(+) [FAQ] AM62x: How to check and configure eMMC flash RST_N signal to support WARM_RESET from eMMC booting on AM62x-SK E2 - Processors forum - Processors - TI E2E support forums

+1 Yogesh Hegde 7 months ago in reply to Bin Liu

Prodigy 20 points

Hi Bin Lu,

I have run the instructions which is these 2 commands

mmc extcsd read /dev/mmcblk0 | grep -i RST

mmc hwreset enable /dev/mmcblk0

An when I run the command

mmc extcsd read /dev/mmcblk0 | grep -i RST

It gives the output

H/W reset function [RST_N_FUNCTION]: 0x01

Which means that the warm reset is enabled. But still the issue is not resolved. The error remains the same.

0 Bin Liu 7 months ago in reply to Yogesh Hegde

TI__Guru**** 171491 points

Hi Yogesh,

Please check your board and ensure the AM64x RESETSTATz pin is connected to the eMMC device RSTn pin.

0 Yogesh Hegde 7 months ago in reply to Yogesh Hegde

Prodigy 20 points

Hi Bin,

Later on the given solution works. For some reason this did not work on the hardware that I was testing on but on other hardware it worked as expected. I suspect that on my hardware it is an hardware issue.

Thank you for your support.

0 Bin Liu 7 months ago in reply to Yogesh Hegde

TI__Guru**** 171491 points

Hi Yogesh,

Do the failure board and later working board have the same (vendor/model) eMMC device or they are different?