Planning to add extruder and stepper driver cooling fans that I want to control via Aux-2, outputs D40, D42, D44 etc. I am testing control of those outputs via pronterface and trying the commands:
M42 P40 255
M42 P40 0
etc, but so far am unable to control the state of those pins. I suspect that I need to tell the marlin firmware to configure those pins as outputs, or to allow control via M42 command. Ideas welcome.
