Integrating device driver into HAL

In the errata.txt that comes with the kit it says:

"151055 - When you first create a component's inc directory,

or HAL component header file, you may need to perform

a clean build, i.e. rebuild, of existing system

library projects for the new files to be detected."

Could it be that was the problem you were running up against? The important thing here is that it's the system library project, not the application project.