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Altera_Forum
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12 years ago

DE2-115 board and SD cards

Dear all, I am lookking for a way to save a big amount of data using DE2-115 board. I hesitate between USB Hard drive and SD card. I think SD card may be the simplest way, but the SDXC which enables the most important data uses exFAt. Did anyone try using this type od SD card with DE2-115 board? I have read DE2-115 is compatible with FAT16 and FAT32, but Ihave seen nothing about exFAT. Thanks to tell me if you have tried, this will help me in my choice.Regards, clec

5 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    12 years ago

    do you really need SDXC?

    SDSC (SD): 1 MB to 2 GB, some 4 GB available.

    SDHC: 4 GB to 32 GB

    SDXC: ≥32 GB to 2 TB
  • Altera_Forum's avatar
    Altera_Forum
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    12 years ago

    --- Quote Start ---

    do you really need SDXC?

    SDSC (SD): 1 MB to 2 GB, some 4 GB available.

    SDHC: 4 GB to 32 GB

    SDXC: ≥32 GB to 2 TB

    --- Quote End ---

    Yes, This is to capture measurements which will last nights and days, and whichever the stockage device that will be used, it won't be emptied every day. SDXC would be safer for us.
  • Altera_Forum's avatar
    Altera_Forum
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    12 years ago

    --- Quote Start ---

    Yes, This is to capture measurements which will last nights and days, and whichever the stockage device that will be used, it won't be emptied every day. SDXC would be safer for us.

    --- Quote End ---

    I don't know what speed you need to access the SD card. if I were you I will consider to use a soft CPU core inside FPGA and have a uclinux or just Linux system run on it. By using the linux core i am sure there must be some support for exFAT. But for the low level driver and IP core I don't know if there is any differences between SD and SDXC.
  • Altera_Forum's avatar
    Altera_Forum
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    12 years ago

    Hi all,

    does somebody have design and firmware which is possible to read and write files from/to sd card with C language NIOSII without uClinux or some another system ? (only with hw. = NIOSII + some sd controller + fw. some library for reading/writing fat system on SD card).

    Thank you very much.

    Jan Naceradsky, Czech Republic