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Altera_Forum's avatar
Altera_Forum
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11 years ago

alt_flash_open_dev() returns 0

I've been using a CFI flash, S29GL....

I'm able to access its contents through Memory read utility in the IDE, and also write into it correctly through Flash Programmer utility..

But, alt_flash_open_dev() always returns 0!

I'm running this on Quartus 10.1 SP1.

Pls help!

4 Replies

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

    Did you call alt_flash_open_dev with the exact device name provided by system.h?

    Memory read works since all CFI flash start in read mode and all have the same sram-like interface.

    Instead, alt_flash_open_dev() accesses the cfi specific functions and assumes you are targeting the correct device.
  • Altera_Forum's avatar
    Altera_Forum
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    11 years ago

    --- Quote Start ---

    Did you call alt_flash_open_dev with the exact device name provided by system.h?

    Memory read works since all CFI flash start in read mode and all have the same sram-like interface.

    Instead, alt_flash_open_dev() accesses the cfi specific functions and assumes you are targeting the correct device.

    --- Quote End ---

    Yes.. I'm calling the fn with exact name.... Gave "/dev/flash_name" too.. Doesn't work :(
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    11 years ago

    Pradeep, I have had the same issue of alt_flash_open_dev() returning 0 all the time. I had enabled reduced drivers in the bsp settings. I do not know if you have it enabled or not. If you do not have it enabled, this solution might not apply to you. But if you do, try disabling them for a quick check.

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

    --- Quote Start ---

    Pradeep, I have had the same issue of alt_flash_open_dev() returning 0 all the time. I had enabled reduced drivers in the bsp settings. I do not know if you have it enabled or not. If you do not have it enabled, this solution might not apply to you. But if you do, try disabling them for a quick check.

    --- Quote End ---

    Hi Baljeet

    i've not set reduced drivers flag!