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8 years, 5 months ago.
referencing a library from another library
I have 2 library's, 1 is the RA8875 and the other is one im creating. I have alot of code which I dont want in the main program (hense putting it into a library) But I need to access the RA8875 library from my library and the main program. This causes a problem as I dont want to initalise it from 2 areas as it could cause problems.
How do I send the reference of the RA8875 library which has been declared in the main program to the library im making so that I can call functions from both places?
I have seen this: https://developer.mbed.org/forum/mbed/topic/2854/
but I cant see how it applies to another library. I understand how it works in the same file but im trying to do it across files. I have tried it and it keeps asking me to put a declaration in like its a second lcd screen.
1 Answer
8 years, 5 months ago.
It works the same for libraries (the example there also shown the Serial library being passed around).
So probably in your constructor you add the requirement for a pointer to an RA8875 instantiation being included. And this you can use to call all your functions. One of your private/protected variable is a pointer to an RA8875, and in the actual constructor code you update this to point to the value passed in the constructor.
So something like (pseudo code):
class YourClass:
public:
YourClass(RA8875* pointer) {
_pointer = pointer;
}
void otherFunction(void) {
_pointer->RA8875function();
}
private:
RA8875* _pointer;
}