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Christopher Pappas
Christopher Pappas
Senior II
January 22, 2018
Solved

FatFs r0.12c breaks FatFS example FatFs_USBDisk in F7_FW v1.9.0

  • January 22, 2018
  • 4 replies
  • 1651 views
Posted on January 22, 2018 at 19:15

Hello to all. I noticed that in the latest release of firmware for the STM32F7 (v1.9.0) the example application FatFs_USBDisk no longer works. During any fs_open command, an error is generated, and the app halts.

This did not happen in the previous version of firmware for the STM32F7 (v1.7.0).

I saw in the product release notes that there was an upgrade of components to the entire FatFs structure. I tried to follow the new rules of operation for the new upgrade (i.e - use updated usbh_diskio files, set block size to 512, etc), but still can't get it to run properly.

The folder for the FatFs applications is \STM32Cube_FW_F7_V1.9.0\Projects\STM32F767ZI-Nucleo\Applications\FatFs\FatFs_USBDisk.

Can somebody verify that they are seeing the same errors as I am seeing here now with this newly upgraded FatFs structure?

Thanks so much!!!

Chris

    This topic has been closed for replies.
    Best answer by Christopher Pappas
    Posted on January 23, 2018 at 13:51

    I looked up the error code I am getting from f_open. it is FR_NO_FILESYSTEM - There is no valid FAT volume on the drive or wrong lower layer implementation.

    I tried another flash drive (Lexar 16GB) instead of the Lexar 32GB I was using.

    That corrected the error.

    I guess FatFs does not support drives larger than 32GB.

    All okay now. Thanks everyone!!!

    4 replies

    Tesla DeLorean
    Tesla DeLorean
    Guru
    January 22, 2018
    Posted on January 22, 2018 at 20:21

    I can confirm that \STM32Cube_FW_F7_V1.8.0\Projects\STM32746G-Discovery\Applications\FatFs\FatFs_uSD works

    I'm using FatFs r0.13 in my own trees, and that does have significant namespace differences to prior versions I was using.

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    Christopher Pappas
    Christopher PappasAuthor
    Senior II
    January 23, 2018
    Posted on January 23, 2018 at 01:46

    Yes you are right Clive. I think the problem is just with the USBDisk application only.

    I'm using the 

    STM32F767ZI-Nucleo board here only.

    Do you have an STM32F767ZI-Nucleo board to check it on?

    Tesla DeLorean
    Tesla DeLorean
    Guru
    January 23, 2018
    Posted on January 23, 2018 at 01:57

    I have some, but not immediately to hand.

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    Christopher Pappas
    Christopher PappasAuthorBest answer
    Senior II
    January 23, 2018
    Posted on January 23, 2018 at 13:51

    I looked up the error code I am getting from f_open. it is FR_NO_FILESYSTEM - There is no valid FAT volume on the drive or wrong lower layer implementation.

    I tried another flash drive (Lexar 16GB) instead of the Lexar 32GB I was using.

    That corrected the error.

    I guess FatFs does not support drives larger than 32GB.

    All okay now. Thanks everyone!!!

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