object files placement in prm

[vijay_v]

Hi,

Is there any way to place the .o files directly in the flash pages using the PRM file.

Cosmic compiler had this option of placing .o files directly to flash pages

Vijay

[Lundin]

.o is traditionally an object file. That is, the compiler output to be used by the linker, not a binary file.

To get the code at a certain place in the flash, write

#pragma CODE_SEG SOMETHING

on top of every source file, and then create "SOMETHING" as a segment in the .prm file.

Message Edited by Lundin on 2007-11-12 08:21 AM

[BlackNight]

Hello,
as an additional tip: instead modifying source files, you can put the #pragma statement (or anything else you want) into a header file, and then use the compiler option -AddIncl which then includes this header file for each file compiled. That way you do not need to change any source files.

BK

[Lundin]

How does that work, more exactly? If the code in file aaa.c should be in segment AAA, the code in file bbb.c should be in segment BBB. And what if one source file contains various code that should be put in different segments (interrupt handlers for example)?

[CrasyCat]

Hello

In order to specify in which code segment you want to place the functions there are two solutions:

  1- You use #pragma CODE_SEG <Segname> in the C source file.

       For example:

          #pragma CODE_SEG AAA

          void func(void) {

           /*Code Here*/

          }

     All functions until the next #pragma CODE_SEG will be placed in segment AAA.

  2- You define all your user defined segment in a header file, which is included in every c source file.

       You can use the option -AddIncl in that purpose. Make sure to return to DEFAULT segment at

       the end of the header file.

      For example myseg.h can be set up as follows:

          #pragma CODE_SEG AAA

          #pragma CODE_SEG BBB

          #pragma CODE_SEG CCC

          #pragma CODE_SEG DDD

         #pragma CODE_SEG DEFAULT

      In the C source file you can then define the function as follows:

        void func(void) @ "AAA" {

           /*Code Here*/

          }

CrasyCat