Duet 3 initial working build

Only the Duet_NG configuration builds at present.
New features:
- Pins are named instead of numbered
- Support multiple endstops per axis
- Support multiple Z probes
- Support M950 for heater and fan mapping
- GPIO pins now need to be allocated before they can be used by M42 or M280
- Laser power velocity ramping
- New codes for 12864 display
- Added LinearAnalogSensor
- Height following mode is mostly implemented
Bug fixes:
- M109 didn't run the tool change files if no tool was selected initially
- The M290 command written to resurrect.g didn't use absolute babystepping
- The M32 command written to resurrect.g didn't quote the filename
- M291 no longer locks the movement system, it stopped the jog buttons working
- M302 now waits for standstill

1 files changed, 88 insertions, 0 deletions

diff --git a/src/Endstops/EndstopDefs.h b/src/Endstops/EndstopDefs.h
new file mode 100644
index 00000000..8264e861
--- /dev/null
+++ b/src/Endstops/EndstopDefs.h
@@ -0,0 +1,88 @@
+/*
+ * EndstopDefs.h
+ *
+ *  Created on: 5 Apr 2019
+ *      Author: David
+ */
+
+#ifndef SRC_ENDSTOPS_ENDSTOPDEFS_H_
+#define SRC_ENDSTOPS_ENDSTOPDEFS_H_
+
+// Forward declarations
+class EndstopOrZProbe;
+class Endstop;
+class ZProbe;
+
+// Actions to take when an endstop is triggered. Note, these values are ordered!
+enum class EndstopHitAction : uint8_t
+{
+	none = 0,						// don't stop anything
+	reduceSpeed = 1,				// reduce speed because an endstop or Z probe is close to triggering
+	stopDriver = 2,					// stop a single motor driver
+	stopAxis = 3,					// stop all drivers for an axis
+	stopAll = 4						// stop movement completely
+};
+
+// Struct that fits in a single register, to return info about what endstop has been triggered and what to do about it
+struct EndstopHitDetails
+{
+	EndstopHitDetails() : action((uint32_t)EndstopHitAction::none), internalUse(0), driver(0), axis(0), setAxisLow(false), setAxisHigh(false) { }
+
+	void SetAction(EndstopHitAction a) { action = (uint32_t)a; }
+	EndstopHitAction GetAction() const { return (EndstopHitAction)action; }
+
+	uint32_t action : 4,			// an EndstopHitAction
+			 internalUse : 4,		// used to pass data between CheckTriggered() and Acknowledge()
+			 driver : 8,			// which driver to stop if the action is stopDriver, or if it is a stall detection endstop
+			 axis : 8,				// which axis to stop if the action is stopAxis, and which axis to set the position of if setAxisPos is true
+			 setAxisLow : 1,		// whether or not to set the axis position to its min
+			 setAxisHigh : 1,		// whether or not to set the axis position to its max
+			 isZProbe : 1;			// whether this is a Z probe
+};
+
+// The values of the following enumeration must tally with the X,Y,... parameters for the M574 command
+enum class EndStopPosition : unsigned int
+{
+	noEndStop = 0,
+	lowEndStop = 1,
+	highEndStop = 2,
+	numPositions = 3
+};
+
+// Type of an endstop input - values must tally with the M574 command S parameter
+enum class EndStopInputType : unsigned int
+{
+	activeLow = 0,
+	activeHigh = 1,
+	zProbeAsEndstop = 2,
+	motorStall = 3,
+	numInputTypes = 4,
+	realZProbe = 100
+};
+
+// This is used as the return type of function Stopped.
+// Note the ordering: we need more-stopped-value > less-stopped-value
+enum class EndStopHit
+{
+  noStop = 0,		// no endstop hit
+  nearStop = 1,		// approaching Z-probe threshold
+  atStop = 2
+};
+
+enum class ZProbeType : uint8_t
+{
+	none = 0,
+	analog = 1,
+	dumbModulated = 2,
+	alternateAnalog = 3,
+	endstopSwitch = 4,
+	digital = 5,
+	e1Switch_obsolete = 6,
+	zSwitch_obsolete = 7,
+	unfilteredDigital = 8,
+	blTouch = 9,
+	zMotorStall = 10,
+	numTypes = 11					// must be 1 higher than the last type
+};
+
+#endif /* SRC_ENDSTOPS_ENDSTOPDEFS_H_ */