I have a question about following code segment:
------------------------ #ifdef _DEBUG #define mprintf printf #else #define mprintf SS/ ------------------------
"SS/" means nothing ? ( or NULL ? )
This has nothing to do with Keil or the 'C' language!
Somebody created that #define because it meant something to them. If you can't find that person and ask them, then you are just going to have to search the source code and any other available documentation and support and try to find out what it's for.
Judging by the reset of the #if, they're trying to eliminate the printf when DEBUG is not defined. It might be a typo for commenting out the rest of the line ("//" instead of "SS/"). Or maybe "SS/" has meaning to some text processor they ran their code through before compiling.
It is more likely that SS is defined to / and that they hope to glue together two /.
SS == "Single Slash"? Sounds plausible, if baroque.
The debug function I use is #define'd to disappear completely.