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Altera_Forum's avatar
Altera_Forum
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20 years ago

Nios fopen

Hi all,

I was trying to use (fopen) & (fclose) to dump data to PC in Nios IDE. The file was never created.

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

FILE *Fp;

Fp = fopen("/dev/ext_flash/dump.txt", "w");

if (Fp == NULL)

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

Nios II software developer's handbook shows, there is not concept of current directory. I should use mounted device and specific file system. Don't quite understand the "Read-Only Zip Filing system" for the flash memory. (Chapter 12 of Nios II Software Developer's Handbook)

Simple and straight question. Is it possible to output something from FPGA to a .txt file on PC filing system?

Please help!!!

10 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    20 years ago

    You could also use the host filing system, though only when running in "Debug" mode. There's an example software template shipped with the kit.

    - slacker
  • Altera_Forum's avatar
    Altera_Forum
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    20 years ago

    --- Quote Start ---

    originally posted by slacker@Jan 25 2006, 01:37 PM

    you could also use the host filing system, though only when running in "debug" mode. there's an example software template shipped with the kit.

    - slacker

    <div align='right'><{post_snapback}> (index.php?act=findpost&pid=12391)

    --- quote end ---

    --- Quote End ---

    Hi Slacker,

    Thanks a lot of your suggestion. I am using the StratixII DSP development kit (EP2S60), don&#39;t have clear impact on the material I have in my hands about the host filing system.

    Could you please give me more detail about locating it?

    thanks,
  • Altera_Forum's avatar
    Altera_Forum
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    20 years ago

    It&#39;s included with the standard software examples shipped with the distribution. It started shipping in 5.0, as part of the ro_zipfs software example, and is a stand alone example in 5.1.

    So, look in:

    <nios2_install_dir>/examples/software/host_filesystem

    or

    <nios2_install_dir>/examples/software/zip_filesystem

    Looking at the code should be enough for you, as it&#39;s pretty straightforward.

    Cheers,

    - slacker
  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    Hi !

    I was trying to use (fopen) & (fclose) to dump data to PC in Nios IDE. The file was never created too.

    I didn't understand. I have the Nios II 8.0, and in this version doesn't have the host_filesystem example.

    I donwloaded this, but it doesn't appear in the templates options menu, when I create a new project.

    Somobody can help me ?
  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    You can't open a file on the PC from the Nios application. You either need to dump your data through the JTAG UART and copy/paste it on the PC, or create your own protocol.

  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    does anyone has an update on this, is there a way to use fwrite, fclose,fopen calls and put the data on the file, JTAG uartcooy of huge data is not possible. Can anyone suggest some alternative method for this.

  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    I succeeded in creating the file.

    I set an option in the project properties.

    Menu Project ->

    Properties ->

    Associated System Library ->

    System Library Properties ->

    Software Components ->

    And set the option: "add this software component"
  • Altera_Forum's avatar
    Altera_Forum
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    15 years ago

    Hi

    I have the same problem: I'd like save elaborated data on my PC, but the fopen function return 0x0. I set the host based file system, but don't work. There is same proble if my o.s. is windows xp?

    Luca
  • Altera_Forum's avatar
    Altera_Forum
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    15 years ago

    Hi Luca, I'm having the same problem. Did you find a solution to that or is the fopen function not possible on Windows PC? I've set the host based file system software component, but I don't know what to write as mount-point. I thought 'C:\\' could be a 'mount-point' for windows systems but I get the 0x0000 return too when in debug mode.

    --- Quote Start ---

    Hi

    I have the same problem: I'd like save elaborated data on my PC, but the fopen function return 0x0. I set the host based file system, but don't work. There is same proble if my o.s. is windows xp?

    Luca

    --- Quote End ---