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CycloneMax support flash memory reprogramming without erase EEPROM
Roger F. May 5, 2015 at 12:04 AM (00:04 hours)
Staff: Takao Y.

  • MCU device : Freescale MKE02Z32, 32K flash with 256 bytes EEPROM.

    The end product is needed firmware upgrade. But it has been pre-programmed with some calibration data in the eeprom which cannot be erased.

    Question: Can the CycloneMax programming image creation procedure supports just the flash memory mass erase and then reprogrammed with application code, but leave the eeprom without erase?




    Comments

  • Greetings,

    Yes it can. It is a feature called preserve range and we have a blog post about this here:
    https://www.pemicro.com/blog/index.cfm?post_id=47

    It involves changing the algorithm. I would advise making a copy of the original algorithm and changing the copied version. That way when you are done preserving data you can switch back to the original algorithm.


    Takao Yamada

  • Greetings,

    Do you have any questions or concerns? Did the preserve range work?


    Takao Yamada

  • Dear Takao,

    Thanks for your advice. Advised my customer to test it.

    BR/Roger

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