> I am involving in a program design about STM32F030,it has two problems when designing
> 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 !