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TMS570LS1227: FEE data write problem

jinus zhang
Intellectual 340 points
Part Number: TMS570LS1227

Hi，

I got problem with FEE data writing. I config FEE  module wih two blocks, each are 512Bytes. Everthing is right with writing and reading except that writing to a block with all 0 after 512bytes 0xFF has been wrote in, and  there is no error return from TI_Fee_GetStatus. While, if i change a byte to non zero, that means not all 0, or calling TI_Fee_EraseImmediateBlock before writing, The data was wrote in successful.

Thanks and Regards,

Jinus

  • 0
    TI__Guru**** 186196 points

    Hello Jinus,

    Your observation is correct. This is a known issue. There are 2 workaround to avoid this issue:

    1. write a dummy data (non zero or non 0xFF)

    2. disable the checksum in ti_fee_cfg.h

    #define TI_FEE_FLASH_CHECKSUM_ENABLE STD_ON -->

    #define TI_FEE_FLASH_CHECKSUM_ENABLE STD_OFF

    If Checksum is enabled, during writing of a block, Checksum of the data to be written is calculated and checked against the Checksum of the same block which is already existing in Flash. If Checksum matches, data is not written. If Checksum is not enabled, then data is compared byte by byte. If data does not match, write will be initiated.

     

  • 0 in reply to QJ Wang
    Intellectual 340 points

    I got it.

    Thank you very much.

    Thanks and Regards,
    Jinus