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What is the maximum length of USB Filename in M4 cortex TIVA

utpal kumar
Expert 2340 points


Hi,

What is the maximum length of USB Filename in M4 cortex?

 I had try to create Filename more than 12 digit with null character for termination but M4 is generate an error about Filename.

 

Below is example for Understanding:-

 

 Filename = xxxxxxxxxxxx.mmyy

 

 E.g. Filename = 123456789023.0114

i.e. 123456789023 = 12 digit code, .0114 = 01 is month and 14 = year

 

 

It is possible in M4 Cortex to increase Filename Length?

  • 0
    Guru 27285 points

    utpal kumar said:
    It is possible in M4 Cortex to increase Filename Length?

     What is an USB filename? Is the one handled by library?

     Too many details missing to be of some help.

  • 0
    TI__Expert 5210 points

    Utpai Kumar, 

    What is it that causes it to fail? Is it the 12 characters to the left of the ".", or the 4 characters to the right of the "."? 

    Also, what is the error code that you are receiving? 

    -Jason

  • 0 in reply to Jason Kriek
    TI__Mastermind 26900 points

    This is a limitation of the file system and doesn't really have anything to do with USB. The version of the FAT file system we use in the usb_dev_msc example applications (which I suspect you are using) does not have long filename support enabled by default. As a result, you are limited to old DOS-style 8.3 filenames. You can, however, recompiled the FATfs file system code to enable long filenames if you want to use these.