Linux/AM3358: DDR3 timings

Harshal Pawar94

Part Number: AM3358

Tool/software: Linux

Hi,

I am working on a custom board based on AM3358 (Beaglebone based design).

I have the DDR3 AC timing values optimized by the TI script.
and have updated these values into the .GEL file.

I also executed the EDMA script to test the DDR3L and the test completed successfully.

I am new to Linux development.
What can be the easiest way to integrate the optimized DDR3L values in the SD card or eMMC OS?

Your comments are appreciated.

Thanks

-HP

over 7 years ago

0 Biser Gatchev-XID over 7 years ago

TI__Guru**** 393215 points

Hi,

See processors.wiki.ti.com/.../Sitara_Linux_Training:_Tuning_the_DDR3_Timings_on_BeagleBoneBlack It's a bit old but still valid.

0 Harshal Pawar94 over 7 years ago in reply to Biser Gatchev-XID

Prodigy 90 points

Hi Biser,

Thank you for the link. I think I have got past the initialization now.

However, this being a custom board, my EEPROM is blank and I am getting "Incorrect Magic Number Error"
I tried searching for solutions but didn't get anywhere.

Can you post a link for a prebuilt image that skips EEPROM check.?
or
Is there any way that we can skip the EEPROM check into the prebuilt images?

Thank you.

- Harshal

0 Biser Gatchev-XID over 7 years ago in reply to Harshal Pawar94

TI__Guru**** 393215 points

There is no way to skip this with the prebuilt images. You can hardcode the EEPROM check, this is what customers usually do.

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Linux/AM3358: DDR3 timings