Using printf function problem...

Hi Sang-Min,

you can specify the "-heap" option in the linker command file (e.g. -heap=0x400) or in the Build Options Linker dialog in CCS. You can find more informations about this in the compiler manual on page 27 (SPNU151G).

You can use the following example code for printf via SCI. the code uses the sciInit() and sciSend() functions generated by HALCoGen v2.11 and the vsnprintf() function out of the C standard library.

/* USER CODE BEGIN (2) */
int sci_printf(const char *_format, ...);
/* USER CODE END */


void main(void)
{
/* USER CODE BEGIN (3) */
   sciInit();

   while(1)
   {
      static unsigned int count = 0;
      sci_printf((const char*)"This is a hex number: 0x%08X\r", count++);
   }
/* USER CODE END */
}


/* USER CODE BEGIN (4) */
void sciNotification(sciBASE_t *sci, unsigned flags)
{
   return;
}

int sci_printf(const char *_format, ...)
{
   char str[128];
   int length = -1;

   va_list argList;
   va_start( argList, _format );

   length = vsnprintf(str, sizeof(str), _format, argList);

   va_end( argList );

   if (length > 0)
   { 
      sciSend(sciREG1, (unsigned)length, (unsigned char*)str);
   }

   return length;
}
/* USER CODE END */

You also need to include "sci.h" and <stdio.h> to use this.

Best Regards,

Christian