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Altera_Forum's avatar
Altera_Forum
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9 years ago

PIO base address constant, defined on design

Hi,

I have made some experiments on NIOS2 core with the Avalon PIO and it’s working fine.

However, differently from some examples found on the Web, e.g iord(pio_0_base,0) - I had to manually paste the numerical base address of the pio_0 which was generated by Qsys. I had to do this way for the sake of Eclipse underlined this parameter warning that it was not recognized by compiler. Although I made a deep search on the content of all files of the design by Windows search tool, seeking some occurence of the partial word “PIO_0” assigned to something related to it current address “3030” ( actually, 0x0000_3030 ), could not find anything.

Correct me if I’m wrong, but should I manually create my own assignments, or are there a better way ?

I fear that after performing eventual updating on base addresses on Qsys this could change the value already defined 

#define        PIO_0_BASE        0x00003030

4 Replies

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

    Do you have:

    #include "system.h"
    in your code? You certainly shouldn't have to hard code the addresses in.

    Cheers,

    Alex
  • Altera_Forum's avatar
    Altera_Forum
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    9 years ago

    You should be able to look up your PIO_0_BASE in your system.h. I assume that you have generate/re-generate BSP based on the new sopcinfo file.

  • Altera_Forum's avatar
    Altera_Forum
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    9 years ago

    --- Quote Start ---

    You should be able to look up your PIO_0_BASE in your system.h. I assume that you have generate/re-generate BSP based on the new sopcinfo file.

    --- Quote End ---

    In addition to regenerate the BSP, you probably need to select the Refresh and/or Rebuild Index commands
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    9 years ago

    Thank you all for the advices.

    I was not aware of the need to re-generate the BSP, and doing that now the PIO_0 base address 0x3030 is visible at the file "system.h".

    The only action that I have to do in order to take effect the changes, it was generating a new BSP project instead of the generate option.