Plane: support multiple simultaneous backends

ArduPlane/Log.cpp

@@ -222,8 +222,7 @@ struct PACKED log_Startup {
     uint16_t command_total;
 };
 
-// do not add any extra log writes to this function; see LogStartup.cpp
-bool Plane::Log_Write_Startup(uint8_t type)
+void Plane::Log_Write_Startup(uint8_t type)
 {
     struct log_Startup pkt = {
         LOG_PACKET_HEADER_INIT(LOG_STARTUP_MSG),
@@ -231,7 +230,7 @@ bool Plane::Log_Write_Startup(uint8_t type)
         startup_type    : type,
         command_total   : mission.num_commands()
     };
-    return DataFlash.WriteBlock(&pkt, sizeof(pkt));
+    DataFlash.WriteBlock(&pkt, sizeof(pkt));
 }
 
 struct PACKED log_Control_Tuning {

ArduPlane/Parameters.cpp

@@ -1158,6 +1158,10 @@ const AP_Param::Info Plane::var_info[] = {
     GOBJECT(camera_mount,           "MNT",  AP_Mount),
 #endif
 
+    // @Group: LOG
+    // @Path: ../libraries/DataFlash/DataFlash.cpp
+    GOBJECT(DataFlash,           "LOG",  DataFlash_Class),
+
     // @Group: BATT
     // @Path: ../libraries/AP_BattMonitor/AP_BattMonitor.cpp
     GOBJECT(battery,                "BATT", AP_BattMonitor),

ArduPlane/Parameters.h

@@ -324,6 +324,8 @@ public:
         k_param_pidNavPitchAltitude, // unused
         k_param_pidWheelSteer, // unused
 
+        k_param_DataFlash = 253, // Logging Group
+
         // 254,255: reserved
     };
 

ArduPlane/Plane.h

@@ -738,7 +738,7 @@ private:
     void do_erase_logs(void);
     void Log_Write_Attitude(void);
     void Log_Write_Performance();
-    bool Log_Write_Startup(uint8_t type);
+    void Log_Write_Startup(uint8_t type);
     void Log_Write_Control_Tuning();
     void Log_Write_TECS_Tuning(void);
     void Log_Write_Nav_Tuning();