AM335x NAND flash programming

Martin Gandler

Prodigy 50 points

Other Parts Discussed in Thread: AM3354

Hi,

I am looking for a way to read and write the external nand flash of a custom board with a AM3354 processor.

The JTAG pins are available.

Best regards,

Martin

over 9 years ago

0 Biser Gatchev-XID over 9 years ago

TI__Guru**** 393215 points

Hi,

This can be done from U-boot: processors.wiki.ti.com/.../Linux_Core_U-Boot_User's_Guide

0 Martin Gandler over 9 years ago in reply to Biser Gatchev-XID

Prodigy 50 points

Hi,

Thank you for the response, the problem is, for the production devices we set boot delay to 0 and disable the console for the OS. So we need to edit the environ args in a different flash partition.

Best regards,
Martin

0 Biser Gatchev-XID over 9 years ago in reply to Martin Gandler

TI__Guru**** 393215 points

I will ask the software team what can be done. They will respond here.

0 Steve Kipisz over 9 years ago in reply to Biser Gatchev-XID

TI__Genius 15510 points

You could load u-boot from JTAG and access the NAND. Just make sure the u-boot you load does not have bootdelay set to 0.

Steve K.

0 RonB over 9 years ago in reply to Martin Gandler

TI__Mastermind 30816 points

Martin,

We suggest using CCS over JTAG to load U-Boot that can see your NAND and make the appropriate edits.

0 Martin Gandler over 9 years ago in reply to RonB

Prodigy 50 points

Hi,

can you suggest a JTAG that is able to do this?

Maybe the XDS100v2JTAG Debug Probe ?

0 RonB over 9 years ago in reply to Martin Gandler

TI__Mastermind 30816 points

Any AM335x compatible debugger should work fine for this, so yes, the XDS100v2 will work. However, it will be "slow". If this is for production where time matters a lot, I would recommend a higher speed debugger like the XDS560. The XDS200 might be a good compromise of speed and cost.

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AM335x NAND flash programming