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Altera_Forum's avatar
Altera_Forum
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14 years ago

SD Card Header Problem

I'm using an SD Card core in my SOPC builder system. In my Nios II IDE program I've included the associated header file. When I build the project I get the following error:

/cygdrive/c/altera/90/ip/altera_up_sd_card_avalon_interface/HAL/inc/altera_up_sd_card_avalon_interface.h:27: error: expected identifier before "false"

In altera_up_sd_card_avalon_interface.h, line 27 there is the following code:

typedef enum e_bool { false = 0, true = 1 } bool;

what is the problem ? I guess there should be no problem with the header files included with the IP cores and we do not need to edit them!!!!!!!!!!!

tnx in advance

9 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    14 years ago

    Hi moeen,

    Probably your projects includes somewhere stdbool.h header, which already has bool type and true/false defined

    If you can't fix it, you can try adding the following undefs just before including the header with the typedef

    # undef false

    # undef true

    # undef bool
  • Altera_Forum's avatar
    Altera_Forum
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    14 years ago

    Mmmm,

    I tried to include the same typedef in one of my projects: I get the error but the undef trick works and it fixes it.

    Maybe you have different compiler settings. C++ support, Small C library, or any other similar options.
  • Altera_Forum's avatar
    Altera_Forum
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    14 years ago

    I have chosen the small C library, could it be the problem? but unchecking it would need a very large amount of memory! :(

  • Altera_Forum's avatar
    Altera_Forum
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    14 years ago

    Do you use c or c++?

    In C++ false and true are parts of the language. In pure C thats not the case.

    if you use c++ try to place the offending header in something like this.

    extern "C"

    {

    #include "altera_up_sd_card_avalon_interface.h"

    }

  • Altera_Forum's avatar
    Altera_Forum
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    13 years ago

    I believe the post creator has already resolved his issues, but, I had the same error and resolved it like this:

    In altera_up_sd_card_avalon_interface.h, removed the line:

    typedef enum e_bool { false = 0, true = 1 } bool;

    Then, included stdbool.h. Problem solved! :)
  • Altera_Forum's avatar
    Altera_Forum
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    13 years ago

    tnx for ur guidace!It's been a long time since that problem and I solved it in a similar way. again tnx for ur help!:)

  • Altera_Forum's avatar
    Altera_Forum
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    13 years ago

    I was stuck with the same error, saw the page but nothing. Then I finally solved it and thought I should post it here ;)