Flash problem

Adrien brody

Prodigy 80 points

HI, Im new to cortex-m4 that is lm4f120h5qr.

I gues this forum for LM3S but I can't find the forum for LM4S.

I have tested this EK with stellarisWare and CCS.

Anyway...

My problem is about to read data that are stored in Flash memory.

I hava an array that have 500 size and have 500 samples.

I used FlashErase() and FlashProgram() apis to write the array in the flash memory.

I set the address 0x10000 and I checked the address.

I found they are stored at the address of 0x10000 in the flash memory.

Now, I want to know

How can I read the data that are stored in the flash memory.

and I want to know some methods that deal with the sections in linker command file.

but I don't know what material(useful docuemts) indicates those.

Thank you for your advice.

over 12 years ago

0 David Racine over 12 years ago

TI__Expert 6140 points

Adrien,

A simple way to read flash (or any memory location) is to use the HWREG macro in hw_types.h.

For example, to read address 0x10000 you would use:

ui32Temp = HWREG(0x10000);

Hope that helps.

0 Adrien brody over 12 years ago in reply to David Racine

Prodigy 80 points

Hi, David.

Thank you for your answer :D

0 cb1_mobile over 12 years ago

Guru 117855 points

The more normal/customary storage medium for such an array is SRAM. Holds especially true should your data be, "live" and/or require frequent or regular update.

SRAM starts @ 0x2000.0000 - and continues for 32KB (& beyond - some past versions)

SRAM is both spectacularly faster to read/write - and avoids many of the "hoops/requirements" demanded by Flash transactions. May warrant consideration...

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Flash problem