Where should I define the pre-define symbols which relate to linking file?

lz li

Hi,

During my development, I met one issue that I didn't know where to define the pre-defined symbol related to linking CMD file.

Requirement:
We have two configurations:

DEBUG
RELEASE


And two linking CMD files:

28335_FLASH_lnk.cmd
28335_RAM_lnk.cmd


Under DEBUG or RELEASE configuration, we may use each of the two linking CMD, but some pre-defiend symbols or macros are only related to one linking CMD file,

such as "FLASH_RUN" is only effective when 28335_FLASH_lnk.cmd is included.

So where should we define these symbols?

I have tried two ways, none of them worked.
1>Add them in "Project Properties->C/C++ build->Tools Settings->C2000 compiler->Pre-defined symbol"
2>Right click the link file->Properties->C/C++ build->Command File Preprocessing, add them into the option "pre-define preprocessor macro..."

BTW, my CCS4 version is: 4.2.3.00004.

Thanks very much by advanced!

over 14 years ago

0 AartiG over 14 years ago

TI__Guru**** 173310 points

The linker has an option --define similar to the predefined symbol compiler option. In CCS, it would appear under Project Properties->C/C++ Build->C2000 Linker->Command File Preprocessing.

Please see the C28x Assembly Language Tools Users Guide, section 7.4.7 for more details on the linker option.
Also this wiki article may be helpful reference on its usage: http://processors.wiki.ti.com/index.php/Using_Preprocessor_Support_in_Linker

0 lz li over 14 years ago in reply to AartiG

Prodigy 180 points

Hi AartiG,

Thanks very much for your kind reply! The problem has been fixed by following your suggestion.

Best regards!

lz.li

0 Muhammad Waseem over 13 years ago in reply to AartiG

Prodigy 50 points

I'm working on eZDSP F28335 board and want to create RAM and/or Flash based projects with single linker CMD file. Following the suggested Wiki page (http://processors.wiki.ti.com/index.php/Using_Preprocessor_Support_in_Linker), I executed the Preprocessing example provided on the Wiki. However, I encountered following warning:

Invalid linker option --define=SECTIONS_FLASH=1 (ignored)

which eventually caused errors in the cmd file where #ifdef and #endif were found to the linker and the build remains unsuccessful.

I am using CCS version 3.3.38.2.

Please help.

Waseem

0 AartiG over 13 years ago in reply to Muhammad Waseem

TI__Guru**** 173310 points

As mentioned in that wiki page, preprocessing support in linker command files was introduced in C2800 code generation tools v5.1.0. If your CCS has an older version that support will not be there. You can update your codegen tools by downloading from this page: https://www-a.ti.com/downloads/sds_support/CodeGenerationTools.htm. Then go into the CCS Component Manager and enable the newer CodeGen tools(any version greater than 5.1.0 should work).

0 Muhammad Waseem over 13 years ago in reply to AartiG

Prodigy 50 points

Thanks Aarti, With updated Code Gen tools all is working well now.

Waseem

0 Paolo Andreuzza over 12 years ago in reply to AartiG

Intellectual 565 points

Good morning.
I'm using CCS 3.3.82.13, and C2000 code generation tools v5.2.12.
Up to now, I've had one symbol predefined, and I got it by specifying the symbol in Project->Build Options -> linker -> Advanced (2)-> Pre-define preproc. macro.
This add --define=MY_SYMBOL in CCS project file, under ["Linker" Settings: "MyConfiguration"] section.
Now I'm in need of predefine two symbols, but if I add the second symbol, where above specified, separated by a comma, in the project file appears only the last one, and after a refresh, even in the "Build Options" window the first one disappears.
Even if I try to modify by a text editor the project file, it seems as if only the last symbol is really predefined.

The compliler section it behaves differently, because I'm allowed to add more predefined symbols, comma separated.

Is it a linker limitation, or am I doing something wrong?
Thank in advance.
Paolo

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Where should I define the pre-define symbols which relate to linking file?