RC_Channel: define sailboat mainsail and motor input channels

The unusual use of 207 is in preparation for Peter Barker's RCMAP replacement PR which uses 200 to 206

libraries/RC_Channel/RC_Channel.cpp

@@ -87,7 +87,7 @@ const AP_Param::GroupInfo RC_Channel::var_info[] = {
     // @DisplayName: RC input option
     // @Description: Function assigned to this RC channel
     // @Values{Copter}: 0:Do Nothing, 2:Flip, 3:Simple Mode, 4:RTL, 5:Save Trim, 7:Save WP, 9:Camera Trigger, 10:RangeFinder, 11:Fence, 13:Super Simple Mode, 14:Acro Trainer, 15:Sprayer, 16:Auto, 17:AutoTune, 18:Land, 19:Gripper, 21:Parachute Enable, 22:Parachute Release, 23:Parachute 3pos, 24:Auto Mission Reset, 25:AttCon Feed Forward, 26:AttCon Accel Limits, 27:Retract Mount, 28:Relay On/Off, 34:Relay2 On/Off, 35:Relay3 On/Off, 36:Relay4 On/Off, 29:Landing Gear, 30:Lost Copter Sound, 31:Motor Emergency Stop, 32:Motor Interlock, 33:Brake, 37:Throw, 38:ADSB-Avoidance, 39:PrecLoiter, 40:Proximity Avoidance, 41:ArmDisarm, 42:SmartRTL, 43:InvertedFlight, 44:Winch Enable, 45:WinchControl, 46:RC Override Enable, 47:User Function 1, 48:User Function 2, 49:User Function 3, 58:Clear Waypoints, 60:ZigZag, 61:ZigZag SaveWP, 62:Compass Learn, 65:GPS Disable, 66:Relay5, 67:Relay6, 68:Stabilize, 69:PosHold, 70:AltHold, 71:FlowHold, 72:Circle, 73:Drift, 100:KillIMU1, 101:KillIMU2
-    // @Values{Rover}: 0:Do Nothing, 4:RTL, 7:Save WP, 9:Camera Trigger, 16:Auto, 19:Gripper, 24:Auto Mission Reset, 28:Relay On/Off, 30:Lost Rover Sound, 31:Motor Emergency Stop, 34:Relay2 On/Off, 35:Relay3 On/Off, 36:Relay4 On/Off, 40:Proximity Avoidance, 41:ArmDisarm, 42:SmartRTL, 46:RC Override Enable, 50:LearnCruise, 51:Manual, 52:Acro, 53:Steering, 54:Hold, 55:Guided, 56:Loiter, 57:Follow, 58:Clear Waypoints, 59:Simple, 62:Compass Learn, 63:Sailboat Tack, 65:GPS Disable, 66:Relay5, 67:Relay6, 100:KillIMU1, 101:KillIMU2
+    // @Values{Rover}: 0:Do Nothing, 4:RTL, 7:Save WP, 9:Camera Trigger, 16:Auto, 19:Gripper, 24:Auto Mission Reset, 28:Relay On/Off, 30:Lost Rover Sound, 31:Motor Emergency Stop, 34:Relay2 On/Off, 35:Relay3 On/Off, 36:Relay4 On/Off, 40:Proximity Avoidance, 41:ArmDisarm, 42:SmartRTL, 46:RC Override Enable, 50:LearnCruise, 51:Manual, 52:Acro, 53:Steering, 54:Hold, 55:Guided, 56:Loiter, 57:Follow, 58:Clear Waypoints, 59:Simple, 62:Compass Learn, 63:Sailboat Tack, 65:GPS Disable, 66:Relay5, 67:Relay6, 74:Sailboat motoring 3pos, 100:KillIMU1, 101:KillIMU2,207:MainSail
     // @Values{Plane}: 0:Do Nothing, 4:ModeRTL, 9:Camera Trigger, 16:ModeAuto, 24:Auto Mission Reset, 28:Relay On/Off, 29:Landing Gear, 34:Relay2 On/Off, 30:Lost Plane Sound, 31:Motor Emergency Stop, 35:Relay3 On/Off, 36:Relay4 On/Off, 41:ArmDisarm, 43:InvertedFlight, 46:RC Override Enable, 51:ModeManual, 55:ModeGuided, 58:Clear Waypoints, 62:Compass Learn, 64:Reverse Throttle, 65:GPS Disable, 66:Relay5, 67:Relay6, 72:ModeCircle, 100:KillIMU1, 101:KillIMU2
     // @User: Standard
     AP_GROUPINFO_FRAME("OPTION",  6, RC_Channel, option, 0, AP_PARAM_FRAME_COPTER|AP_PARAM_FRAME_ROVER|AP_PARAM_FRAME_PLANE),

libraries/RC_Channel/RC_Channel.h

@@ -171,10 +171,14 @@ public:
         FLOWHOLD  =           71, // flowhold mode
         CIRCLE    =           72, // circle mode
         DRIFT     =           73, // drift mode
+        SAILBOAT_MOTOR_3POS = 74, // Sailboat motoring 3pos
         KILL_IMU1 =          100, // disable first IMU (for IMU failure testing)
         KILL_IMU2 =          101, // disable second IMU (for IMU failure testing)
         // if you add something here, make sure to update the documentation of the parameter in RC_Channel.cpp!
         // also, if you add an option >255, you will need to fix duplicate_options_exist
+
+        // inputs eventually used to replace RCMAP
+        MAINSAIL =           207, // mainsail input
     };
     typedef enum AUX_FUNC aux_func_t;