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  1. #1
    Beginner Beginner sagarssoman is on a distinguished road
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    Re-Writing data in Flash Memory for XMC 4400

    Hello
    I am using the XMC 4400 chip and the part which I am going to discuss is part of a larger code.

    At power up I write certain data into the flash memory say in flash sector 1. During normal operation I take data from RAM and routinely write it to Flash memory until I fill up the entire sector. If there is a reset then the data from Flash is used to repopulate the data variables in RAM
    After writing the entire Flash sector 1, I erase that sector to reprogram it with new data. I have observed that after erasing the flash memory some of the data values in RAM get changed which affects the operation of my entire code.

    Is there a way I can keep the RAM values intact after the Flash erase?
    What are things I should do before erasing flash such as disabling interrupts which I am doing before erasing flash memory?

  2. #2
    Intermediate Intermediate Janet is on a distinguished road
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    What sector do you exactely flash/erase? Because there are sectors reserved for the code, and write in them can corrupt your code

  3. #3
    Beginner Beginner sagarssoman is on a distinguished road
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    Hello Janet
    Thank you for the reply. I have fixed my issue. The RAM contents would change because a DMA DAVE App was not being disabled during flash erase. Hence it would change certain RAM contents and populate it with wrong data.

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