MK22 Eeprom writing failure

[mayursavaj]

Hi,

I am working on MK22FX512VLL12 controller. I am trying to write into some data into flex memory. I using below function

void writeEeprom(unsigned long addr, unsigned char data)

{

  *((uint8_t *)(addr)) = data; 

    /* Make sure the EEE is ready. If not wait for the command to complete */

    while(!(FTFE_FCNFG & FTFE_FCNFG_EEERDY_MASK));

}

my program unable to execute (!(FTFE_FCNFG & FTFE_FCNFG_EEERDY_MASK)); instruction.

Please any one help me to resolve this issue.

Thanks in advance.

[bobpaddock]

The wait should be before the data write, going by the comments. Wait for the PREVIOUS command to complete, if any. Are you saying it locks up at the wait or the wait does nothing at all?

[mayursavaj]

Hi Bob Paddock,

Thanks for your reply.

Yes, it locks up at the wait or the wait does nothing at all.

But interestingly this was not happen to all microcontroller even though firmware and part no are same.

Please help me to resolve my issue.

[rhysdrummond]

Did you ever resolve this?  I'm hitting a similar issue porting from CW 10.6 to KDS 3.2 with a MK21FX512VMC12.

It hangs on the "while(!(FTFE_FCNFG & FTFE_FCNFG_EEERDY_MASK))" check in the KDS project.

The CW project works fine.

The only significant differences I can see in the generated code is in the IntFlashLdd1.c file, which seems to have different values in "SafeRoutine[]".  The settings via PE are identical though, so I don't know why this has changed.

Any thoughts anyone?

TIA

[mayursavaj]

Anyone help me to resolve this issue.

[jeremyzhou]

Hi Mayur,

To provide the fastest possible support I want to point you to a similar question which has been answered on our Freescale community. Please refer to

https://community.freescale.com/message/538953#538953 and https://community.freescale.com/message/480552#480552 to view the details.

The FlexNVM feature (EEPROM) is implemented in the C90TFS flash driver, which comes with example projects. The driver can be downloaded from the next link:

http://cache.freescale.com/files/32bit/software/C90TFS_FLASH_DRIVER.exe

Have a great day,

Ping

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[mayursavaj]

Hi,

I have found that EEERDY bit is low in FTFE_FCNFG register. Can you tell me how to set FlexRAM as EEEPROM operation.

Thanks in advance.