I'm porting a bootloader to my MK10DN512VLL10. Trouble verifying written bytes?

markosiponen — Fri, 28 Mar 2014 13:22:39 GMT

I'm porting a bootloader to my MK10DN512VLL10. I have used it in an MKL15Z128VFT4 before wihout problems.

When I execute a "Program Longword" and then read back the four written bytes I get a miss match. But if i single step my code it works.

If I disable the verification I can successfully download my application to flash with my bootloader.

I suspect the cache memory is the problem and it reads back the four bytes from cache memory and not from flash?

How do I make sure i really read back the four bytes from flash and not cache?

Update

So i tested to disable the cache before and after write to flash and it works.

PFB0CR_restore = FMC->PFB0CR;

FMC->PFB0CR = PFB0CR_restore | FMC_PFB0CR_CINV_WAY(15); <--- I selected all as I don't know what else to select

execute_flash_command();

FMC->PFB0CR = PFB0CR_restore;

Re: I'm porting a bootloader to my MK10DN512VLL10. Trouble verifying written bytes?

Jorge_Gonzalez — Tue, 01 Apr 2014 23:52:43 GMT

Hello:

I see you found a solution/workaround in that other thread. I just wanted to confirm, is your issue resolved?

Regards!

Jorge Gonzalez