Rover: support 14 RC channels on PX4

APMrover2/Parameters.h

@@ -36,6 +36,8 @@ public:
         k_param_relay,
         k_param_BoardConfig,
         k_param_pivot_turn_angle,
+        k_param_rc_13,
+        k_param_rc_14,
 
         // IO pins
         k_param_rssi_pin = 20,
@@ -231,6 +233,8 @@ public:
 #endif
 #if CONFIG_HAL_BOARD == HAL_BOARD_PX4
     RC_Channel_aux rc_12;
+    RC_Channel_aux rc_13;
+    RC_Channel_aux rc_14;
 #endif
 
     // Throttle
@@ -294,6 +298,8 @@ public:
 #endif
 #if CONFIG_HAL_BOARD == HAL_BOARD_PX4
         rc_12                                   (CH_12),
+        rc_13                                   (CH_13),
+        rc_14                                   (CH_14),
 #endif
 
         // PID controller    initial P        initial I        initial D        initial imax

APMrover2/Parameters.pde

@@ -213,6 +213,14 @@ const AP_Param::Info var_info[] PROGMEM = {
     // @Group: RC12_
     // @Path: ../libraries/RC_Channel/RC_Channel.cpp,../libraries/RC_Channel/RC_Channel_aux.cpp
     GGROUP(rc_12,                    "RC12_", RC_Channel_aux),
+
+    // @Group: RC13_
+    // @Path: ../libraries/RC_Channel/RC_Channel.cpp,../libraries/RC_Channel/RC_Channel_aux.cpp
+    GGROUP(rc_13,                    "RC13_", RC_Channel_aux),
+
+    // @Group: RC14_
+    // @Path: ../libraries/RC_Channel/RC_Channel.cpp,../libraries/RC_Channel/RC_Channel_aux.cpp
+    GGROUP(rc_14,                    "RC14_", RC_Channel_aux),
 #endif
 
     // @Param: THR_MIN

APMrover2/Steering.pde

@@ -264,6 +264,8 @@ static void set_servos(void)
  #endif
  #if CONFIG_HAL_BOARD == HAL_BOARD_PX4
     g.rc_12.output_ch(CH_12);
+    g.rc_13.output_ch(CH_13);
+    g.rc_14.output_ch(CH_14);
  #endif
 
 #endif

APMrover2/radio.pde

@@ -40,6 +40,8 @@ static void init_rc_out()
 #endif
 #if CONFIG_HAL_BOARD == HAL_BOARD_PX4
     servo_write(CH_12,  g.rc_12.radio_trim);
+    servo_write(CH_13,  g.rc_13.radio_trim);
+    servo_write(CH_14,  g.rc_14.radio_trim);
 #endif
 }