USB Hardware Abstraction Layer (HAL) (Header File)
This file abstracts the hardware interface. The USB stack firmware can be compiled to work on different USB microcontrollers, such as PIC18 and PIC24. The USB related special function registers and bit names are generally very similar between the device families, but small differences in naming exist.
In order to make the same set of firmware work accross the device families, when modifying SFR contents, a slightly abstracted name is used, which is then "mapped" to the appropriate real name in the usb_hal_picxx.h header.
Make sure to include the correct version of the usb_hal_picxx.h file for the microcontroller family which will be used.
This file is located in the "<Install Directory>\Microchip\Include\USB" directory.
When including this file in a new project, this file can either be referenced from the directory in which it was installed or copied directly into the user application folder. If the first method is chosen to keep the file located in the folder in which it is installed then include paths need to be added so that the library and the application both know where to reference each others files. If the application folder is located in the same folder as the Microchip folder (like the current demo folders), then the following include paths need to be added to the application's project:
..\Include
..\..\Include
..\..\MicrochipInclude
..\..\<Application Folder>
..\..\..\<Application Folder>
If a different directory structure is used, modify the paths as required. An example using absolute paths instead of relative paths would be the following:
C:\Microchip Solutions\Microchip\Include
C:\Microchip Solutions\My Demo Application