AP_RCProtocol: expose protocol name mapping

libraries/AP_RCProtocol/AP_RCProtocol.cpp

@@ -198,9 +198,9 @@ void AP_RCProtocol::start_bind(void)
 /*
   return protocol name
  */
-const char *AP_RCProtocol::protocol_name(void) const
+const char *AP_RCProtocol::protocol_name_from_protocol(rcprotocol_t protocol)
 {
-    switch (_detected_protocol) {
+    switch (protocol) {
     case PPM:
         return "PPM";
     case SBUS:
@@ -219,3 +219,11 @@ const char *AP_RCProtocol::protocol_name(void) const
     }
     return nullptr;
 }
+
+/*
+  return protocol name
+ */
+const char *AP_RCProtocol::protocol_name(void) const
+{
+    return protocol_name_from_protocol(_detected_protocol);
+}

libraries/AP_RCProtocol/AP_RCProtocol.h

@@ -29,6 +29,7 @@ public:
         instance = this;
     }
     ~AP_RCProtocol();
+
     enum rcprotocol_t {
         PPM = 0,
         SBUS,
@@ -66,9 +67,17 @@ public:
     bool new_input();
     void start_bind(void);
 
+    // return protocol name as a string
+    static const char *protocol_name_from_protocol(rcprotocol_t protocol);
+
     // return protocol name as a string
     const char *protocol_name(void) const;
 
+    // return protocol name as a string
+    enum rcprotocol_t protocol_detected(void) const {
+        return _detected_protocol;
+    }
+    
     // access to singleton
     static AP_RCProtocol *get_instance(void) {
         return instance;