Does TI RTOS work with classes, cpp files? Ti RTOS Task cpp c++ compiling unresolved symbol

Paulo Freitas de Araujo Filho

Hi,

I have a main code on a main.c file and a couple tasks in the TI RTOS cfg file. Everything compiles and works fine.

But, when I include a class declaration and some other functions in a crypto.cpp and crypto.h files that I have written there are a few compiling problems.

1) Even though I included in main.c the crypto.h, it says class was undefined. After looking around on the forum I solved this changing my main.c file to main.cpp. Another option that solves this is keep main.c file and mark the compiler advanced option for treating c files as cpp files.

2) The problem now is that I am getting a unresolved symbol error for the tasks I am using.

CCS has an example with a cpp file called bigtime for TM4C129. This example doesn't have tasks and compiles just fine. But when I include a task on it, it shows the same unresolved symbol error I got before.

Can anyone please help me to solve this issue?

Thank you,

Paulo

over 8 years ago

0 Amit Ashara over 8 years ago

TI__Guru**** 244400 points

Hello Paulo

Moving it to the TI RTOS forum.

0 Sasha Slijepcevic over 8 years ago

TI__Mastermind 37985 points

Paulo, please take a look at Chapter 1.5 in www.ti.com/.../spruex3q.pdf
If that doesn't help, please post the complete console output with errors.

0 Paulo Freitas de Araujo Filho over 8 years ago in reply to Sasha Slijepcevic

Prodigy 110 points

Hi Sasha,

I am getting an error just like when I try to compile the bigtime.cpp example. Follows a print from my screen.

Thanks,

Paulo

0 Sasha Slijepcevic over 8 years ago in reply to Paulo Freitas de Araujo Filho

TI__Mastermind 37985 points

I am using the same bigtime example and there is a task created in bigtime.cfg:

Program.global.task1 = Task.create("&clockTask", task1Params);

The function clockTask is a wrapper, which calls a class function Clock::tick on a Clock instance defined in bigtime.cpp. Another important part is the block extern "C" that protects wrapper functions from name mangling. So, that's the pattern that you should follow for your task. I am guessing the function 'task0Fx' is a wrapper for some class function declared in crypto.h. Have you added an extern C block for 'task0Fx' declaration? Is your task created statically in the CFG script, or at runtime?

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Does TI RTOS work with classes, cpp files? Ti RTOS Task cpp c++ compiling unresolved symbol