How to use task in C++?

My El Mustapha Ait Yakoub

Hi,

I'm using TCI6486 under CCS V3.3, and I try to migrate my c code to cpp code. My code use some task,and when I compile it return these errors:

undefined                  first referenced
symbol                        in file
---------                  ----------------
_QueueDecrementTTLPrd      F:\\Adaptive\\DSP1000_cPlusPlus\\Bin\\Core0_Release\\Main_core0cfg.obj
_debugTask                 F:\\Adaptive\\DSP1000_cPlusPlus\\Bin\\Core0_Release\\Main_core0cfg.obj
_filterTask                F:\\Adaptive\\DSP1000_cPlusPlus\\Bin\\Core0_Release\\Main_core0cfg.obj
_queueRemoveExpiredTTLTask F:\\Adaptive\\DSP1000_cPlusPlus\\Bin\\Core0_Release\\Main_core0cfg.obj
_snmpTask                  F:\\Adaptive\\DSP1000_cPlusPlus\\Bin\\Core0_Release\\Main_core0cfg.obj

I managed to solve this problem by adding this configuration:

#if defined __cplusplus
} // End "C"
#endif // __cplusplus

//My code

#if defined __cplusplus
} // End "C"
#endif // __cplusplus

What I think is that we add this in header file, so how to solve this problem in case of task and Debug loop (DSP/BIOS config).

Can you give me an idea on how to solve this echo?

Thanks.

over 13 years ago

0 Laszlo Papp over 13 years ago

Expert 1145 points

To be fair, I have no clue, but perhaps it is a name mangling issues? In that case, "extern C" can help at times.

However, I really do not know if that is applicable in this special scenario.

0 Whitney Dewey over 13 years ago

TI__Guru 54905 points

Hello,

Could you tell me which DSP/BIOS version you're using and which hardware platform?

BIOS 5 includes a C++ example called "bigtime" that you could try:

<your bios install directory>\packages\ti\bios\examples\bigtime.cpp

Also, if you have not done so already, please review the "Using C++ with DSP/BIOS" section of your DSP/BIOS User's Guide.

Thanks,

Whitney

0 My El Mustapha Ait Yakoub over 13 years ago in reply to Whitney Dewey

Prodigy 100 points

Hi,

I'm using TCI6486 platform, and 5.33.06 DSP/BIOS version.

Thanks,

0 Whitney Dewey over 13 years ago in reply to My El Mustapha Ait Yakoub

TI__Guru 54905 points

Thanks for the info. Did you look at the "bigtime" example? Did you check out the "Using C++ with DSP/BIOS" portion of the User's Guide (I believe it's <bios install directory>\docs\spru423f.pdf, section 2.8)? It presents issues that need to be taken into consideration when using C++, like name mangling.

Whitney

0 My El Mustapha Ait Yakoub over 13 years ago in reply to Whitney Dewey

Prodigy 100 points

Hi,

Thank you for your answer. That's answer my question.

Thanks,

0 Whitney Dewey over 13 years ago in reply to My El Mustapha Ait Yakoub

TI__Guru 54905 points

Glad to hear it. I also stumbled across this page yesterday:

http://processors.wiki.ti.com/index.php/Overview_of_C%2B%2B_Support_in_TI_Compilers

It could be a good reference if you come across any other issues.

Whitney

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How to use task in C++?