Copter: Change external button specification to option

Copter: Change the definition name from BUTTON to BUTTON_ENABLED.

ArduCopter/APM_Config.h

@@ -46,6 +46,7 @@
 //#define MODE_THROW_ENABLED    DISABLED            // disable throw mode support
 //#define MODE_ZIGZAG_ENABLED   DISABLED            // disable zigzag mode support
 //#define OSD_ENABLED           DISABLED            // disable on-screen-display support
+//#define BUTTON_ENABLED        DISABLED            // disable button support
 
 
 // features below are disabled by default on all boards

ArduCopter/Copter.cpp

@@ -196,7 +196,9 @@ const AP_Scheduler::Task Copter::scheduler_tasks[] = {
 #ifdef USERHOOK_SUPERSLOWLOOP
     SCHED_TASK(userhook_SuperSlowLoop, 1,   75),
 #endif
+#if BUTTON_ENABLED == ENABLED
     SCHED_TASK_CLASS(AP_Button,            &copter.g2.button,           update,           5, 100),
+#endif
 #if STATS_ENABLED == ENABLED
     SCHED_TASK_CLASS(AP_Stats,             &copter.g2.stats,            update,           1, 100),
 #endif

ArduCopter/Copter.h

@@ -72,7 +72,6 @@
 #include <AP_LandingGear/AP_LandingGear.h>     // Landing Gear library
 #include <AC_InputManager/AC_InputManager.h>        // Pilot input handling library
 #include <AC_InputManager/AC_InputManager_Heli.h>   // Heli specific pilot input handling library
-#include <AP_Button/AP_Button.h>
 #include <AP_Arming/AP_Arming.h>
 #include <AP_SmartRTL/AP_SmartRTL.h>
 #include <AP_TempCalibration/AP_TempCalibration.h>
@@ -156,6 +155,9 @@
 #if CAMERA == ENABLED
  # include <AP_Camera/AP_Camera.h>
 #endif
+#if BUTTON_ENABLED == ENABLED
+ # include <AP_Button/AP_Button.h>
+#endif
 
 #if OSD_ENABLED == ENABLED
  #include <AP_OSD/AP_OSD.h>
@@ -553,6 +555,11 @@ private:
     AP_Parachute parachute{relay};
 #endif
 
+    // Button 
+#if BUTTON_ENABLED == ENABLED
+    AP_Button button;
+#endif
+
     // Landing Gear Controller
     AP_LandingGear landinggear;
 

ArduCopter/Parameters.cpp

@@ -732,9 +732,11 @@ const AP_Param::GroupInfo ParametersG2::var_info[] = {
     // @User: Standard
     AP_GROUPINFO("WP_NAVALT_MIN", 1, ParametersG2, wp_navalt_min, 0),
 
+#if BUTTON_ENABLED == ENABLED
     // @Group: BTN_
     // @Path: ../libraries/AP_Button/AP_Button.cpp
     AP_SUBGROUPINFO(button, "BTN_", 2, ParametersG2, AP_Button),
+#endif
 
 #if MODE_THROW_ENABLED == ENABLED
     // @Param: THROW_NEXTMODE

ArduCopter/Parameters.h

@@ -485,8 +485,10 @@ public:
     // altitude at which nav control can start in takeoff
     AP_Float wp_navalt_min;
 
+#if BUTTON_ENABLED == ENABLED
     // button checking
     AP_Button button;
+#endif
 
 #if STATS_ENABLED == ENABLED
     // vehicle statistics

ArduCopter/config.h

@@ -371,6 +371,12 @@
 # define BEACON_ENABLED !HAL_MINIMIZE_FEATURES
 #endif
 
+//////////////////////////////////////////////////////////////////////////////
+// Button - Enable the button connected to AUX1-6
+#ifndef BUTTON_ENABLED
+ # define BUTTON_ENABLED ENABLED
+#endif
+
 //////////////////////////////////////////////////////////////////////////////
 // RADIO CONFIGURATION
 //////////////////////////////////////////////////////////////////////////////