TMS320F280040-Q1: Driverlib compilation error into a C++ project

Luciano Chaves said:

I started importing the driverlib empty_project and when I rename the main.c to main.cpp, I'm getting this compilation errors

I can repeat this. Looks to be two problems:

1) The static inline ERAD_getOwnership() function in C2000Ware_4_00_00_00\driverlib\f28004x\driverlib\erad.h contains an implicit cast from an integer expression to an enumeration. This is legal in C, but not in C++. Constructs valid in C but not in C++ contains:

C++ is also more strict in conversions to enums: ints cannot be implicitly converted to enums as in C.

To avoid the error think the ERAD_getOwnership() function in erad.h should be changed from:

static inline ERAD_Owner
ERAD_getOwnership()
{
    //
    // Read Global Owner register and return value
    //
    return((ERAD_Owner)(HWREGH(ERAD_GLOBAL_BASE + ERAD_O_GLBL_OWNER) &
                        ERAD_GLBL_OWNER_OWNER_M) >> ERAD_GLBL_OWNER_OWNER_S);
}

To:

static inline ERAD_Owner
ERAD_getOwnership()
{
    //
    // Read Global Owner register and return value
    //
    return(ERAD_Owner)((HWREGH(ERAD_GLOBAL_BASE + ERAD_O_GLBL_OWNER) &
                        ERAD_GLBL_OWNER_OWNER_M) >> ERAD_GLBL_OWNER_OWNER_S);
}

2) For At end of source: error #68: expected a "}" guessed the issue was one C2000Ware include file which didn't have a matching closing } for an extern "C" block.

Searching all C2000Ware f280004x/driverlib include files for #ifdef __cplusplus found C2000Ware_4_00_00_00\driverlib\f28004x\driverlib\pmbus_common.h which has an opening block:

//*****************************************************************************
//
// If building with a C++ compiler, make all of the definitions in this header
// have a C binding.
//
//*****************************************************************************
#ifdef __cplusplus
extern "C"
{
#endif

But is missing the closing block:

//*****************************************************************************
//
// Mark the end of the C bindings section for C++ compilers.
//
//*****************************************************************************
#ifdef __cplusplus
}
#endif

The missing closing block explains why the include file can be included when included from a C program, but generates an error when included from a C++ program.

Luciano Chaves said:

Do you guys have experience using driverlib in C++ projects? Is this a good idea?

Not sure if TI officially support, and test, using driverlib from C++ projects.