Kevin O'Connor afecf7ce36 stepper: Default to a high direction pin meaning positive direction
Invert the default meaning of the stepper direction pin.  Instead of
treating a low value as position motion, treat a high value as
positive motion.  This matches what other firmwares do, and it matches
what common stepper motor drivers document.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
2016-11-08 10:39:32 -05:00
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