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paolo239955_stm1
Visitor II
April 9, 2009
Question

sprintf

  • April 9, 2009
  • 2 replies
  • 770 views
Posted on April 09, 2009 at 12:21

sprintf

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    2 replies

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    paolo239955_stm1Author
    Visitor II
    May 17, 2011
    Posted on May 17, 2011 at 11:32

    Hi all,

    I am in big trouble with my app, EWARM 5.20 + uC/OS II. I have a task writing a floating on an output buffer, like this:

    char outval[16];

    float me->INval__ = 123.456;

    sprintf (outval, ''%f'', me->INval__);

    well, sprintf writes randomly ''0.000'' or ''-nan'' (or other garbage) to outval buffer.

    I stepped thru all the (s)printf assembler to check the stack pointer, it stays inside his bounds. I tried changing from ARM mode to THUMB mode, no relief. The strangest thing of all, if I put a simple sprintf loop in main task without creating any other task sprintf woks well. Something to do with task switching ?

    I am desperate , please help !

    P
    paolo239955_stm1Author
    Visitor II
    May 17, 2011
    Posted on May 17, 2011 at 11:32

    sorry, wrong forum....I'll repost on ARM9 STR9 forum

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