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Altera_Forum's avatar
Altera_Forum
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20 years ago

Direct Read/Write of flash from uClinux app

I am trying to use the flash on the development board to store some user settings that remain between boots, but can't figure out how to directly access the flash device. I see that there are functions available for generic NIOS2 apps, or for uCOS apps, but can't find anything on how to do the same thing under uClinux. Are there any examples that I can use as a starting point for this?

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    20 years ago

    Why not try those same commands under uCLinux? It's built on top of the HAL, as well, I believe.

    Cheers,

    - slacker
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    20 years ago

    Hi mtmurphy,

    There are a bunch of ways to do this. The easiest would probably be to use mtd and do direct

    access via the character mode driver (ie -- through the /dev/mtd inode). You would then be

    able to read/write and use ioctl for erasing.

    A step up from there would be to add jffs2 and just create-read-modify-write a file -- more kernel

    config here, but it doesn't get much easier from a programming point-of-view.

    Regards,

    --Scott