CCS/TMS320F28335: Pre-define NAME option question

sir zhang23

Part Number: TMS320F28335

Tool/software: Code Composer Studio

CCS V5.3.0 is used for F28335 development.The question is about: Show Build settings -> Build -> C2000 Compiler -> Advanced Options -> Predefined Symbols -> Pre-define NAME

1)I want to confirm whether following example expression is correct for "Pre-define NAME":

CANOPEN

#define CANOPEN 2

CANOPEN=2

2)In fact, I want to achieve following function, is it possible to use "Pre-define NAME"? then I could use different "Build Configurations" for project build.

#if CANOPEN == 0

#if CANOPEN == 1

#if CANOPEN == 2

thanks

over 7 years ago

0 George Mock over 7 years ago

TI__Guru**** 250260 points

sir zhang23 said:

1)I want to confirm whether following example expression is correct for "Pre-define NAME":

CANOPEN

This is correct. It defines the preprocessor name CANOPEN, but does not assign it a value. You would test it with lines like

#ifdef CANOPEN

/* ... or ... */

#ifndef CANOPEN

sir zhang23 said:
#define CANOPEN 2

Incorrect. Do not use the #define syntax in this context

sir zhang23 said:
CANOPEN=2

Correct. This defines the preprocessor name and assigns it the value 2.

sir zhang23 said:
2)In fact, I want to achieve following function, is it possible to use "Pre-define NAME"? then I could use different "Build Configurations" for project build.

Correct. Different build configurations can assign different values to CANOPEN, and you can test those values in the C source.

Thanks and regards,

-George

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CCS/TMS320F28335: Pre-define NAME option question