Merged Marlin, Marlin non gen6 and Ultimaker changes

Marlin/stepper.h

@@ -0,0 +1,40 @@
+/*
+  stepper.h - stepper motor driver: executes motion plans of planner.c using the stepper motors
+  Part of Grbl
+
+  Copyright (c) 2009-2011 Simen Svale Skogsrud
+
+  Grbl is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  Grbl is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with Grbl.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef stepper_h
+#define stepper_h 
+// Initialize and start the stepper motor subsystem
+void st_init();
+
+// Block until all buffered steps are executed
+void st_synchronize();
+
+// The stepper subsystem goes to sleep when it runs out of things to execute. Call this
+// to notify the subsystem that it is time to go to work.
+void st_wake_up();
+
+// if DEBUG_STEPS is enabled, M114 can be used to compare two methods of determining the X,Y,Z position of the printer.
+// for debugging purposes only, should be disabled by default
+#ifdef DEBUG_STEPS
+extern volatile long count_position[NUM_AXIS];
+extern volatile int count_direction[NUM_AXIS];
+#endif
+
+#endif