MSPM0G3107: Cannot read/write to certain areas on flash

Isac Selea

Part Number: MSPM0G3107

Tool/software:

I'm trying to access certain areas on the flash like .intvec and the whole sector where intvec is located.
Doing a read of the intvec results in only reading 0xFF from every byte, yet I can read access the data with no issue through the debugger
The thing is that I need to read from that area and then invalidate it by erasing it, but I cannot seem to be able to do that

Is there something I've missed?

10 months ago

0 Diego Abad Sajamin 10 months ago

TI__Genius 15392 points

Hi Isac,
Can you confirm that when you read the flash from the function, you only read 0xFF, but when you use the debugger, it reads the desired data?
Also, which example from our SDK are you using? I want to see if I can replicate the issue you're having.
Best Regards,
Diego Abad

0 Isac Selea 10 months ago in reply to Diego Abad Sajamin

Prodigy 45 points

I'm not using any example really, but the functions I'm using are

DL_FlashCTL_eraseMemoryFromRAM

and

DL_FlashCTL_programMemoryFromRAM64WithECCGenerated

It seems like I can read from that specific area if I edit the linker file and place .intvec somewhere else

0 Diego Abad Sajamin 10 months ago in reply to Isac Selea

TI__Genius 15392 points

Hi Isac,

I'll take a look at this with our software team just to confirm.

Best Regards,

Diego Abad

0 Diego Abad Sajamin 10 months ago in reply to Isac Selea

TI__Genius 15392 points

Hi Isac,

Could you tell me which address are you trying to read from?

Best Regards,

Diego Abad

0 Isac Selea 10 months ago in reply to Diego Abad Sajamin

Prodigy 45 points

Ok we believe we found the issue.
We had ported a codebase to the MCU and found that it performed a write operation on one place without doing an erase first, which resulted in weird ECC faults.

So we can now read from all the addresses on the flash, and also perform write operations properly without faults.

The address we tried to read from was 0x000A000 to 0x000A0FF and it only returned 0xFF, but after resolving the ECC issue it now returns the correct data

0 Diego Abad Sajamin 10 months ago in reply to Isac Selea

TI__Genius 15392 points

Hi Isac,
I'm glad you found the answer to it. Sorry I took too long to answer.

Best Regards,

Diego Abad

0 Isac Selea 10 months ago in reply to Diego Abad Sajamin

Prodigy 45 points

No worries, it was our own code after all

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MSPM0G3107: Cannot read/write to certain areas on flash