Microcontroller development platforms (MPLAB from Microchip, CodeWarrior from NXP, and so on) may have utilities to generate code (.c and .h files... maybe .o). Implementing solutions around these .h files may lead to code that won't be able to be ported to other microcontrollers.
Here I propose this library with "abstract" headers (.h files) of peripherals, so it can be used against (if possible) most of these platforms, to keep portable the code, relying only in platform specific implementations of these headers.
Create a .c file (maybe based from one in the examples folder) that implements the .h header file you need. Configure your project to include the src folder as it includes the "abstract" headers.