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debug messages using ifdef

Hi,

there's one pin depending on his level (high or low), the programm should / or should not transmit all the rs232 debug messages (printf()) to the hyperterminal.

How is it possible to use some #ifdefs | or is it much better to use a global variable?

#ifdef DEBUG_MODE
//debug mode - transmit all msg to the hyperterminal

#else
//no debug messages

#endif


int main(void)
{
  if(AT91C_BASE_PIOA->PIO_PDSR & 0x10)
  {
     /* -> transmit rs232 debug messages */

  } else {

    /* do not transmit any debug messages */
  }

   printf("only tansmit the msg if DEBUG_INIT is true");

  while(1);
}

best regards
Tim

Parents

0 HansBernhard Broeker over 16 years ago in reply to Tim Herbig

The canonical method is

#ifdef ENABLE_DEBUG_PRINTOUTS
# define DEBUG_PRINTF(args) printf args
#else
# define DEBUG_PRINTF(args) /*nothing*/
#endif
/*...*/
DEBUG_PRINTF(("outch, that %s hurt!\n", symptom));

Note: the double parentheses are important.

Reply

0 HansBernhard Broeker over 16 years ago in reply to Tim Herbig

The canonical method is

#ifdef ENABLE_DEBUG_PRINTOUTS
# define DEBUG_PRINTF(args) printf args
#else
# define DEBUG_PRINTF(args) /*nothing*/
#endif
/*...*/
DEBUG_PRINTF(("outch, that %s hurt!\n", symptom));

Note: the double parentheses are important.

Children

0 Tim Herbig over 16 years ago in reply to HansBernhard Broeker

Thank you for your time & information.
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