What are predefined macros?

Hi Ben,

This is an example pre-defined macro;

#define BOARD_ICE335X

What this does is allows developers to write a single file for use on multiple systems, such as the ICE, EVM, and SKs.  This is done so source code will build specifically for a certain board (usually dev kits).

Maybe the term macro is a bit misleading in that context. Yes, you can define whole 'macros' with a #define.

But what it is used for here in the context of IA-SDK is conditional computation. Based on #define done or not you will get different code included in the source and therefor a different behavior of the program. This is often used to save lines of code but can get pretty confusing if used excessively.

#define can be set in files (e.g. header) or in the development environment (compiler options...). In the later case it will be stored in the project file. So if you start a new project don't forget to copy the necessary compiler options from examples.

Regards.

Thanks, but it is still not clear to me exactly what is required here.

From your description it seems I need to add the following #defines for ICE board:

#define HW_ICE

#define SPI

But which header file do I add them to or which compiler option do I modify in CCS?

Thanks Shahid, I've got it now.

thanks