OMAP-L138: Reed-Solomon ECC Reference Request

Patrick McCloskey

Expert 1015 points

Part Number: OMAP-L138

Tool/software:

OMAPL138BGWTMEP boots from Micron NAND Flash MT29F4G16ABBDAH4AIT on our circuit boards.

We are using the 4-bit ECC feature of the EMIFA.

Testing boot failure scenarios with actual hardware tends to be rather time-consuming.

I would like to simulate boot failure scenarios to look for "interesting test cases".

Suppose I want to model the OMAP-L138 EMIFA Reed-Solomon ECC algorithm in a standalone software application in MATLAB, C/C++, Python, or some other language. Can you point me to reference material that would help me accomplish that? I would like to be able to feed my model a 512 byte block of data in a simulated write operation and see what it computes for the ten ECC parity bytes. I like to think my model and the EMIFA ECC would produce the same ECC parity bytes. In a simulated read operation, I would like my model to compute the locations of the byte errors along with the values to use to correct them, like the EMIFA ECC.

Can you suggest reference material for the OMAP-L138 EMIFA Reed-Solomon ECC algorithm?

Is TI's implementation proprietary?

Thanks for guidance.

Patrick

3 months ago

0 Patrick McCloskey 3 months ago

Expert 1015 points

I found an interesting article in the MATLAB Help Center with information about Reed-Solomon Coding Syntaxes in MATLAB.

Error Detection and Correction - MATLAB & Simulink

They provide some interesting examples that use the following configuration parameters:

m : of bits in each symbol
n : Codeword length = 2^m - 1
k : Message length
t : Error-correction capability of the code = (n-k)/2

They configure their Reed-Solomon encoder and decoder like this:

hEnc = comm.RSEncoder(n,k);
hDec = comm.RSDecoder(n,k);

What do I use for n and k to model the OMAP-L138 EMIFA ECC algorithm?

0 PaulM 3 months ago in reply to Patrick McCloskey

TI__Mastermind 28035 points

Patrick

I will take a look at this and get back to you, probably early next week.

—Paul

0 Patrick McCloskey 3 months ago in reply to PaulM

Expert 1015 points

Hi Paul.

I eagerly anticipate any information or guidance you are able to share.

Patrick

0 PaulM 2 months ago in reply to Patrick McCloskey

TI__Mastermind 28035 points

Patrick

Sorry for the delay. I am waiting on a colleague to check if this data is available. He should reply directly to this thread.

--Paul

0 Patrick McCloskey 2 months ago in reply to PaulM

Expert 1015 points

Hi Paul:

I eagerly await any information or guidance.

Patrick

0 PaulM 2 months ago in reply to Patrick McCloskey

TI__Mastermind 28035 points

Patrick

Unfortunately we have made no progress on finding the information you require.

--Paul

0 Rahul Prabhu 2 months ago in reply to PaulM

TI__Guru** 116170 points

Gen ECC tool that we provided generated ECC bits on host. We are only able to locate it in Flash and boot utils package here

OMAP-L138_FlashAndBootUtils_2_40\Common\genecc

genecc.zip

Hope this helps

Thanks and Regards,

Rahul

0 Patrick McCloskey 2 months ago in reply to Rahul Prabhu

Expert 1015 points

Thanks Rahul.

I have not been able to spend much time on this, but after cursory review, this might be exactly what I wanted. Thanks again.

Patrick

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OMAP-L138: Reed-Solomon ECC Reference Request