Question: What could go wrong in the procedures followed?
1. include stdio.h
2. invoke printf according to its format
3. add -o option when running the simulator
4. the program ran successfully except the printf message did not show up anywhere

Answer: Also include trgcio.h ; this one has the cio basic routines in it. The simulator does not support cio, only emulator (rev 5.20) Also, you need to include a section called .cio in the linker command file and furthermore, the heap should be big enough for this routine.

Example:

*************** example.c ***************-
#include [stdio.h]
#include [trgcio.h]
 
void main (void)
{
  unsigned char a[4]=TI;
  printf (%s\n, a);
  printf (TI\n);
}
 
-******************* link.cmd *******************-
-c
-stack 0x400
-heap  0x400
-lrts30.lib
/* SPECIFY THE SYSTEM MEMORY MAP */
MEMORY
{
   EXT0:   org = 0x200000 len = 0x2000
   IRAM:   org = 0x809800 len = 0x0800
}
/* SPECIFY THE SECTIONS ALLOCATION INTO MEMORY */
SECTIONS
{
   .text:   > EXT0
   .cinit:  > EXT0
   .const:  > EXT0
   .stack:  > IRAM
   .sysmem: > EXT0
   .bss:    > EXT0
   .cio:    > EXT0
}
-************ end of examples *******************-