EEPROM emulation on KL25 using C90TFS

[#1]

Hello all.

I would like to share an example project for FRDM-KL25Z board on which C90TFS Flash Driver was included to implement emulated EEPROM (Kinetis KL25 doesn’t have Flex Memory).

It is based on the “NormalDemo” example project. A string of bytes is stored on the last page of the flash memory (address 0x1FC00-0x1FFFF), and then, it is overwritten with a different string.

The ZIP file also includes the “Standard Software Driver for C90TFS/FTFx Flash User’s Manual” document. For more information, please refer to Freescale website and search for “C90TFS” flash driver.

Hope this will be useful for you.
Best regards!

/Carlos

[Kan_Li]

Thanks for sharing this:smileyhappy:

[kerryzhou]

Good document and code! Thanks for your sharing!

[dave__]

same example but using the IAR tools..please.

David

[CarlosCasillas]

Hi,

Last version of C90TFS drivers could be downloaded from here and IAR examples are included.

Best regards!

/Carlos

[dave__]

 Hello Carlos,

Can you please provide an specific demo for the KL02. I'm not sure how to use the driver with the KL02.

Thank you in advance,

David

[antonioconcio]

Hi David,

Another way to realize that would be using PEx. Please have a look at THIS Erich's post on MCUonEclipse.

Hope that helps,

Antonio

[dave__]

Can PEx be used with IAR IDE? or is it only for CW. And if yes then how do you use PEx with IAR.

Regards,

David

[BlackNight]

Yes, PEx can be used with IAR, see http://mcuoneclipse.com/2013/01/31/tutorial-iar-freertos-freedom-board/

[lokuate]

Hello Carlos,

I've been trying to test you code in KDS but on line 80:

WRITE8(flashCmdTo, value);

I get an error, probably an exeption due to a mistake in my linker file related to the __ram_for_command_sequence_func variable.

Have you migrated your project to KDS?

Look forward to your answer.

Kindest Regards,

Carlos

[CarlosCasillas]

Hello Carlos,

We don't have examples on KDS; the C90TFS demos are on CW and IAR only.

Best regards!

/Carlos.

[enlaiaranzabal]

Hi Guys

I tried this code and modified to work in a FRDM-KL46Z, and it works, but at first I was getting the same issue, and i was unable to compile it:

"

FRDM-KL46Z_EEPROM_Emulation_Test01\Debug/../Sources/NormalDemo.c:149: undefined reference to `__ram_for_command_sequence_func'

collect2.exe: error: ld returned 1 exit status

make: *** [FRDM-KL46Z_EEPROM_Emulation_Test01.elf] Error 1

"

I fixed changing the declaration type, for instance:

Before:

#ifdef FLASH_TARGET

    extern uint32_t __ram_for_command_sequence_func[];

#endif

After:

#ifdef FLASH_TARGET

    uint32_t __ram_for_command_sequence_func[];

#endif

Now it is working on my FRDM-KL46Z, and of course i change the MCU header file from the MKL25 to the MKL46 to make it work properly.