Forgive me if this has already been asked, I am new to Smoothie and this forum. I'm configuring a new setup and looking at where and how the parameters (found in the "config" file) are handled in the source code. While many are quickly found in module code (for example, "gamma_current" shows up in "CurrentControl.cpp"), there are plenty I can't locate. For example, the "gamma_en_pin" and "alpha_dir_pin" parameters? I don't see them in any of the source code—where are they used?