NAND Flash from raw C

Bernard Klinc

Other Parts Discussed in Thread: OMAP-L138

I am trying to interface NAND flash over EMIFA inside raw C code and i saw that im supposed to manually execute each step in a read/write operation rather than using the memory mapped area to simply read/write there.But i have not found any information at all on how do i acualy execute any of those steps to access the NAND inside the EMIFA documentation.

Is there any other piece of documentation that shows the process of a NAND read/write operation.

over 14 years ago

0 1258021 over 14 years ago

Genius 5120 points

Hi Bernard Klinc,

My understanding is your are looking for information on how to perform read and write to a NAND Device.

Which Processor and NAND Chip are you using?

If you are using OMAP-L138 then you can download the CCS code and you can refer thise examples.

Actually NAND is not memory mapped. You have to send some commands for read and write.

The simple read and write works for NOR flash not for NAND.

Thank You & Regards,

GSR

0 Bernard Klinc over 14 years ago in reply to 1258021

Prodigy 230 points

Yes i am using a OMAP L138 with a 8bit 128MB flash chip (MT29F1G08ABCHC:C)

Yes this is the problem that it is not memory mapped as then i would just have to configure the registers as the pdf says to and use the memory range just like DDR2, But i have found no information on how to acualy send commands to the NAND chip.

I would love some CCS example code for this even if its for a completely different NAND chip since what i want to know the most is the procedure of performing a NAND memory access. If it uses ECC error correction its even better since i need to implement that too.

0 1258021 over 14 years ago in reply to Bernard Klinc

Genius 5120 points

Hi Bernard Klinc,

You can download CCS projects from Logic PD's site.

http://logicpd.com/products/development-kits/zoom-omap-l138-evm-development-kit#tabs-som-2

Any how you have to register in their site for downloading them or else you have to contact TI FAE for getting those projects.

Also refer the following URL which calculates the EMIFA Configuration register http://processors.wiki.ti.com/index.php/Programming_Asynchronous_EMIF_on_OMAP-L13x_/_C674x_/_AM1x

Thank You & Regards,

GSR

0 Bernard Klinc over 14 years ago in reply to 1258021

Prodigy 230 points

Thanks for the answer but i can't get to those files as i never brought a board from LogicPD so they don't allow me to see any of the useful files on there site.

Can you recommend who at TI should i turn to for this?

0 1258021 over 14 years ago in reply to Bernard Klinc

Genius 5120 points

Hi,

You can download OMAP Boot Utils Package for OMAP-L138 or Linux PSP.

The following URL is for Linux PSP http://software-dl.ti.com/dsps/dsps_public_sw/sdo_tii/psp/LinuxPSP/DaVinci_03_20/index.html

The following URL is for OMAP Boot Utils Package http://sourceforge.net/projects/dvflashutils/files/OMAP-L138/

If you had installed CCS then you can open the UBL source code project and then can refer the nand.c source file.

I had installed 2.30 version of OMAP Boot Utils Package.

Thank You & Regards,

GSR

0 Bernard Klinc over 14 years ago in reply to 1258021

Prodigy 230 points

The OMAP Boot Untils Packege seams to have some useful NAND code in it.

Thanks for your help!

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NAND Flash from raw C