Thanks DUST, that is how I have them wired and is my config for Marlin 1.1.x. I copied that over to Marlin 2.0.x but got no movement.
After a lot of reading, I found info regarding the SKR 1.4 Turbo board that says the VCC for the stepper pins is only 3.3v.
I can only guess that this is where the problem is. If the M542 are not receiving the proper voltage, they won't know when
to pulse. I'm looking into using an empty pin that has known 5V, but I don't have enough info yet to feel confident in which
pin to use. If I find a solultion, I'll post back.