AM3352: Raw mode eMMC boot fails

Hiroyasu Tazawa1

Part Number: AM3352

Hi, Everyone

I have a question about eMMC boot of AM335x.

My customer want Raw mode boot of eMMC boot using MMC1 boot.
It was success. but It is failed after board revision change.
(It is no change around AM335x)
We look PC is loop
and We got tracing vector values below:

===========OK===========
0x0010009F
0x0001E000
0x00000000

===========NG===========
0x0000907F
0x0000F000
0x00111000

Do you know why it is failed ?
Have you ever had same situation ?

We want some advice.
We guess CHESTSETTING and GP Header are not found.

Best Regards
Hiroyasu

over 8 years ago

0 Biser Gatchev-XID over 8 years ago

TI__Guru**** 393215 points

Hi,

Please post more information about the board changes. This failure obviously is connected to them.

0 Hiroyasu Tazawa1 over 8 years ago in reply to Biser Gatchev-XID

Guru 12350 points

Hi, Biser

Thank you for your reply.
I have customer's circuit diagram. but I can not post this on pubric forum.

Please give me mail.
My address is here.

tazawa@fujiele.co.jp

Best Regards
Hiroyasu

0 Biser Gatchev-XID over 8 years ago in reply to Hiroyasu Tazawa1

TI__Guru**** 393215 points

I was actually asking about the differences between the two board revisions. Do they have a list of changes they have done?

0 Hiroyasu Tazawa1 over 8 years ago in reply to Biser Gatchev-XID

Guru 12350 points

Hi, Biser

O.K! Let me check and I will feedback.

Colud you give me some advice about software and tracing vector ?
Actually PC loop in ROM code.
I guess AM335x can not found CHSETTINGS and GP-Header.
I want to know reason why PC loop.

Best Regards
Hiroyasu

0 Biser Gatchev-XID over 8 years ago in reply to Hiroyasu Tazawa1

TI__Guru**** 393215 points

I have asked the factory team. I do not have access to the ROM code.

0 Hiroyasu Tazawa1 over 8 years ago in reply to Biser Gatchev-XID

Guru 12350 points

Hi, Biser

Thank you Biser !
I appriciate to you !

Best Regards
Hiroyasu

0 Hiroyasu Tazawa1 over 8 years ago in reply to Biser Gatchev-XID

Guru 12350 points

Hi, Biser and Factory Team

I'm sorry.My customer need to hurry.
Could you reply?

Best Regards
Hiroyasu

0 Biser Gatchev-XID over 8 years ago in reply to Hiroyasu Tazawa1

TI__Guru**** 393215 points

I have escalated the request.

0 Hiroyasu Tazawa1 over 8 years ago in reply to Biser Gatchev-XID

Guru 12350 points

Thank you Biser !

Best Regards

Hiroyasu

0 Hiroyasu Tazawa1 over 8 years ago in reply to Biser Gatchev-XID

Guru 12350 points

Hi, Biser

We check target board again.
but it is no change around AM335x.
Other Places is changed.

Actually, We can debug on this target board.
but boot is faild.

Could you update about software and tracing vector ?

Best Regards
Hiroyasu

0 Brad Griffis over 8 years ago in reply to Hiroyasu Tazawa1

TI__Guru*** 125430 points

Will you please use the JTAG and the script documented here:

http://processors.wiki.ti.com/index.php/AM335x_board_bringup_tips#Analyzing_Boot_Issues_with_CCS_and_JTAG

I created that script for precisely these sorts of issues to help expedite the diagnosis.

0 Hiroyasu Tazawa1 over 8 years ago in reply to Brad Griffis

Guru 12350 points

Hi, Brad

Thank you for your reply.
We try your solution. but it has not been resolve.

My customer think this situation about boot below
They guess AM335x can not find (3) RAW Header. and it loop.

(1) Find MBR and partition information in boot area # 0.
(2) Search the FAT table in the partition based on the information, but MLO can not be found.
(3) Find the RAW header in boot area # 1 which is the next activation area.
(4) Load and execute the program binary based on the subsequent GP header.

but AM335x is working when place RAW header, GP header and program binary in boot area # 0, # 1, # 2

Could you please tell me why AM335x is working in this situation? if you know.

Best Regards
Hiroyasu

0 Brad Griffis over 8 years ago in reply to Hiroyasu Tazawa1

TI__Guru*** 125430 points

Please attach the generated output.

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AM3352: Raw mode eMMC boot fails