AP_Temperature: Add DroneCAN source

libraries/AP_TemperatureSensor/AP_TemperatureSensor_Backend.cpp

@@ -90,6 +90,9 @@ void AP_TemperatureSensor_Backend::update_external_libraries(const float tempera
             AP::battery().set_temperature_by_serial_number(temperature, _params.source_id);
             break;
 #endif
+        case AP_TemperatureSensor_Params::Source::DroneCAN:
+            // Label only, used by AP_Periph
+            break;
 
         case AP_TemperatureSensor_Params::Source::None:
         case AP_TemperatureSensor_Params::Source::Pitot_tube:

libraries/AP_TemperatureSensor/AP_TemperatureSensor_Params.cpp

@@ -58,7 +58,7 @@ const AP_Param::GroupInfo AP_TemperatureSensor_Params::var_info[] = {
     // @Param: SRC
     // @DisplayName: Sensor Source
     // @Description: Sensor Source is used to designate which device's temperature report will be replaced by this temperature sensor's data. If 0 (None) then the data is only available via log. In the future a new Motor temperature report will be created for returning data directly.
-    // @Values: 0: None, 1:ESC, 2:Motor(not implemented yet), 3:Battery Index, 4:Battery ID/SerialNumber, 5: CAN based Pitot tube
+    // @Values: 0: None, 1:ESC, 2:Motor, 3:Battery Index, 4:Battery ID/SerialNumber, 5:CAN based Pitot tube, 6:DroneCAN-out on AP_Periph
     // @User: Standard
     AP_GROUPINFO("SRC", 4, AP_TemperatureSensor_Params, source, (float)Source::None),
 

libraries/AP_TemperatureSensor/AP_TemperatureSensor_Params.h

@@ -43,6 +43,7 @@ public:
         Battery_Index               = 3,
         Battery_ID_SerialNumber     = 4,
         Pitot_tube                  = 5,
+        DroneCAN                    = 6,
     };
 
     AP_Enum<Type> type;             // 0=disabled, others see frontend enum TYPE