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Altera_Forum's avatar
Altera_Forum
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15 years ago

SOPC builder

hi, my problem is that i'm trying to get floating point numbers in nios; i had done my program yesterday and it was succesfull when it generated, but in nios it was giving 0 when i wrote numbers with printf.

that's why i found some documents today and i had changed my sopc builder's cpu settings with adding floating point hardware and check the division factor but nothing else and then i push generate button but it had failed

Error: Failed to refresh PTF file

and know all the sopc programs give the same error, and i can't do anything. could you say what can i do:confused:.

3 Replies

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

    --- Quote Start ---

    my problem is that i'm trying to get floating point numbers in nios; i had done my program yesterday and it was succesfull when it generated, but in nios it was giving 0 when i wrote numbers with printf.

    --- Quote End ---

    Double check that the "enable small c library" option is not selected in your BSP settings. The small C library does not including floating point support for printf.
  • Altera_Forum's avatar
    Altera_Forum
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    15 years ago

    Hi

    I've done programs with NIOS II with FP custom instructions and they've work fine. Remember that in order to use printf you have to use something like %4.2 (4 integer digits and 2 decimal).

    Try to create a new C/C++ application with the program and the PTF file generated.