Inline functions, C for MSP430

Bob,

Does the compiler fail to build or do you see in the disassembly view that the function was not inlined?

Just as a cleanup check, check the inline usage guidelines in section 2.11 and restrictions shown in section 3.7 of the MSP430 Compiler User's guide (link here).

Also, I will move this thread to the compiler forum, so the experts there can have additional insights.

Regards,

Rafael

Rafael,

Thanks for the fast response / forwarding.  The compiler flags the whole block as an error based on the illegal/unrecognized keyword "inline".

e.g.

inline get_time( );

xxxxxx

inline void get_time( void)

{

xxxx

}

Thnaks,

Bob Strother

What is the exact error message you are getting?

The code snippet in your message would get into trouble because the declaration (which implicitly returns type int) and the definition (which returns void) do not match.  But I suspect that was just a typo.  Fixing that makes the snippet compile correctly.

If you are compiling with the --strict_ansi (-ps) option then "inline" would not be recognized as a keyword, although "__inline" (two underscores) would.

OK,

In this case the target is the MSP430F1611.  I get the same error messages with 'inline' or '__inline' (two underscores).

I get no error from the function prototype declaration "inline void toggle_led( void );" or from the definition of the function

"inline void toggle_led( void )
{
    P1OUT ^= 0x03;                      // Toggle P1.0 using exclusive-OR
}"

I get two errors: 

""inline" is not allowed"  and
"declaration may not appear after executable statement in block "

when the function is called:

inline void toggle_led();

The console text (command line and errors) follows:

**** Build of configuration Debug for project MSP430-flash1 ****

C:\Program Files (x86)\Texas Instruments\ccsv4\utils\gmake\gmake -k all
'Building file: ../main.c'
'Invoking: Compiler'
"C:/Program Files (x86)/Texas Instruments/ccsv4/tools/compiler/MSP430 Code Generation Tools 3.2.3/bin/cl430" --silicon_version=msp -g --include_path="C:/Program Files (x86)/Texas Instruments/ccsv4/msp430/include" --include_path="C:/Program Files (x86)/Texas Instruments/ccsv4/tools/compiler/MSP430 Code Generation Tools 3.2.3/include" --diag_warning=225 --printf_support=minimal --preproc_with_compile --preproc_dependency="main.pp"  "../main.c"
"../main.c", line 50: error: declaration may not appear after executable statement in block
"../main.c", line 50: error: "inline" is not allowed
"../main.c", line 50: warning: function "toggle_led" was declared but never referenced
"../main.c", line 38: warning: variable "temp" was set but never used
2 errors detected in the compilation of "../main.c".

>> Compilation failure
C:\Program Files (x86)\Texas Instruments\ccsv4\utils\gmake\gmake: *** [main.obj] Error 1
C:\Program Files (x86)\Texas Instruments\ccsv4\utils\gmake\gmake: Target `all' not remade because of errors.
Build complete for project MSP430-flash1

The "temp" is a variable I was using for debugging and it was never used.

Thanks for your help,

Bob