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Saket_OmBest answer
ST Technical Moderator
Mar 19, 2025 10:48 AM UTC

Hello @MauFanGilaMedical 

Yes, it is possible to open multiple files simultaneously using FATFS. The number of files can be set via the FS_LOCK parameter in STM32CubeMX.

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Saket_OmBest answer
ST Technical Moderator
Mar 19, 2025 10:48 AM UTC

Hello @MauFanGilaMedical 

Yes, it is possible to open multiple files simultaneously using FATFS. The number of files can be set via the FS_LOCK parameter in STM32CubeMX.

Saket_Om_0-1742381271642.png

 

In order to give better visibility on the answered topics, please click on 'Best answer' on the reply which solved your issue or answered your question. Saket_Om
    MauFanGilaMedical
    MauFanGilaMedicalAuthor
    Associate III
    Mar 19, 2025 12:18 PM UTC

    so I can open one file in uSD and copy its content to another on uSD ?

    I have to do this copy to change some content.

    I did a first try but processor goes into Hard_Fault ... I supposed that I cannot open two files.

    I will investigate and Accept as Solution if I see that I can.

    Thankyou for the advice

    Ozone
    Ozone
    Principal
    Mar 19, 2025 12:37 PM UTC

    I would think separate FIL objects for both files should suffice.
    Otherwise, I would try to call f_sync() whenever you change the file you currently access.

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