> > Hello~all
> > I am involving in a program design about STM32F030,it has two problems when
> > the program.Can you help me?
> > 1). Invoking “invalid” by function as the following picture: the warning showed in
> > the screen. How to solve it?
> > 2). Writing the structural body in .h file as the picture three,but it can’t be
> > invoked in the .c file.
> > Please give me some suggestions, thanks a lot !
It looks like you're missing an "extern" somewhere. C is more restrictive than C++. You should look at your code as if it was being interpreted by the most strict C compiler.
What is the exact thing that you're trying to do? What are you attempting to do with this STM32 microcontroller?