Combining C and C++ libraries

here is how i do it and it works

stmmxcube-> generate code for keil

compile code in keil

in keil-> right click main.c->options for file main.c->file type->c++ source file

now you can add c++ header files and it will work

when you regenerate code form stm cubemx repeat steps

i generally add c++ files from arduino and make them compatable

it works always

some functions are still not supported

currently c++17 is supported 

The techniques for mixing 'C' and C++ are standard - not specific to Keil - so should be covered in standard references.

one key factor is the use of 

extern "C"

Unknown said:

I'm a novice with STM32 and Keil

Are you familiar with using STM32 in any other IDE(s) ?

Are you familiar with using  any other microcontroller(s) ?

Are you familiar with 'C' and/or C++ programming in general ?

For learning, start here:

http://www2.keil.com/mdk5/learn

See also: https://www.keil.com/books/ 

Thank you very much.  I will try that.

Thank you.   I will take a look at those resources.  No I've not used STM32 in other IDE's.  I've used other microcontrollers, but at a higher level of abstraction.  I am familiar with C and a have less experience with C++ .

Btw - see: "How do I call C++ code from C?"

www.keil.com/.../4245.htm

manually writing the prototype multiple times with different formats in different files is a maintenance nightmare!

That example misses the usual practice of using a #ifdef __cplusplus so that the same header can be used by both .c and .cpp files:

#ifdef __cplusplus
extern "C" {
#endif

void myFunc(int);

#ifdef __cplusplus
}
#endif

Thanks again for your reply.  I still receive this error:

Error: C4065E: type of input file \RFM69-STM32-master\rfm69.hpp' unknown

Do you have any suggestions to resolve it?

Frank

Please dis-regard my last error post, I didn't catch that it added the hpp as a source file instead of a text file.  Your solution worked.  Thanks again.