document multicast methods of applicationlayer and transportlayer

.gitignore

@@ -26,6 +26,7 @@ flash.bin
 build
 dist
 *.egg-info
+doxyoutput
 
 # Visual Studio 2015 cache/options directory
 .vs/

doc/references.bib

@@ -1,3 +1,19 @@
+@manual{knx:3/3/4,
+    organization  = "KNX Association",
+    title         = "KNX System Specifications Chapter 3/3/7 Application Layer",
+    year          =  2013,
+    month         =  11,    
+    note          = "v01.02.02"
+}
+
+@manual{knx:3/3/7,
+    organization  = "KNX Association",
+    title         = "KNX System Specifications Chapter 3/3/7 Application Layer",
+    year          =  2013,
+    month         =  12,    
+    note          = "v01.06.02"
+}
+
 @manual{knx:3/4/1,
     organization  = "KNX Association",
     title         = "KNX System Specifications Chapter 3/4/1 Application Interface Layer",

src/knx/address_table_object.h

@@ -14,6 +14,7 @@ class AddressTableObject: public TableObject
 public:
     /**
      * The contructor.
+     * 
      * @param platform This parameter is only passed to the custructor of TableObject an not used by this class.
      */
     AddressTableObject(Platform& platform);

src/knx/application_layer.h

@@ -7,16 +7,62 @@
 class AssociationTableObject;
 class BusAccessUnit;
 class TransportLayer;
-
+/**
+ * This is an implementation of the application layer as specified in @cite knx:3/5/1.
+ * It provides methods for the BusAccessUnit to do different things and translates this 
+ * call to an APDU and calls the correct method of the TransportLayer. 
+ * It also takes calls from TransportLayer, decodes the submitted APDU and calls the coresponding
+ * methods of the BusAccessUnit class.
+ */
 class ApplicationLayer
 {
   public:
+    /**
+     * The constructor.
+     * @param assocTable The AssociationTable is used to translate between asap (i.e. group objects) and group addresses.
+     * @param bau methods are called here depending of the content of the APDU
+     */
     ApplicationLayer(AssociationTableObject& assocTable, BusAccessUnit& bau);
+    /**
+     * Assigns the TransportLayer to which encoded APDU are submitted to.
+     */
     void transportLayer(TransportLayer& layer);
 
     // from transport layer
 #pragma region Transport - Layer - Callbacks
+    /**
+     * Somebody send us an APDU via multicast communiation. See 3.2 of @cite knx:3/3/4. 
+     * See also ApplicationLayer::dataGroupConfirm and TransportLayer::dataGroupRequest.
+     * This method is called by the TransportLayer.
+     * 
+     * @param tsap used the find the correct GroupObject with the help of the AssociationTableObject. 
+     *        See 3.1.1 of @cite knx:3/3/7
+     *        
+     * @param apdu The submitted APDU.
+     * 
+     * @param priority The ::Priority of the received request.
+     * 
+     * @param hopType Should routing be endless or should the NetworkLayer::hopCount be used? See also ::HopCountType.
+     */
     void dataGroupIndication(HopCountType hopType, Priority priority, uint16_t tsap, APDU& apdu);
+    /**
+     * Report the status of an APDU that we sent via multicast communiation back to us. See 3.2 of @cite knx:3/3/4. 
+     * See also ApplicationLayer::dataGroupConfirm and TransportLayer::dataGroupRequest. This method is called by 
+     * the TransportLayer.
+     * 
+     * @param tsap used the find the correct GroupObject with the help of the AssociationTableObject. 
+     *        See 3.1.1 of @cite knx:3/3/7
+     *        
+     * @param apdu The submitted APDU.
+     * 
+     * @param priority The ::Priority of the received request.
+     * 
+     * @param hopType Should routing be endless or should the NetworkLayer::hopCount be used? See also ::HopCountType.
+     * 
+     * @param status Was the request successful?
+     * 
+     * @param ack Did we want a DataLinkLayer acknowledgement? See ::AckType.
+     */
     void dataGroupConfirm(AckType ack, HopCountType hopType, Priority priority, uint16_t tsap,
                           APDU& apdu, bool status);
     void dataBroadcastIndication(HopCountType hopType, Priority priority, uint16_t source, APDU& apdu);
@@ -33,6 +79,7 @@ public:
     void dataConnectedConfirm(uint16_t tsap);
 #pragma endregion
 
+#pragma region from bau
     void groupValueReadRequest(AckType ack, uint16_t asap, Priority priority, HopCountType hopType);
     void groupValueReadResponse(AckType ack, uint16_t asap, Priority priority, HopCountType hopType, uint8_t* data, uint8_t dataLength);
     void groupValueWriteRequest(AckType ack, uint16_t asap, Priority priority, HopCountType hopType, uint8_t* data, uint8_t dataLength);
@@ -79,6 +126,8 @@ public:
     void authorizeResponse(AckType ack, Priority priority, HopCountType hopType, uint16_t asap, uint8_t level);
     void keyWriteRequest(AckType ack, Priority priority, HopCountType hopType, uint16_t asap, uint8_t level, uint32_t key);
     void keyWriteResponse(AckType ack, Priority priority, HopCountType hopType, uint16_t asap, uint8_t level);
+#pragma endregion
+
   private:
     void propertyDataSend(ApduType type, AckType ack, Priority priority, HopCountType hopType, uint16_t asap,
                           uint8_t objectIndex, uint8_t propertyId, uint8_t numberOfElements, uint16_t startIndex, uint8_t* data,

src/knx/knx_types.h

@@ -8,16 +8,16 @@ enum FrameFormat
 
 enum Priority
 {
-    LowPriority = 0xC,
-    NormalPriority = 0x4,
-    UrgentPriority = 0x8,
-    SystemPriority = 0x0
+    LowPriority = 0xC,    //!< Normal priority of group communication.
+    NormalPriority = 0x4, //!< More important telegrams like central functions
+    UrgentPriority = 0x8, //!< Used for alarms.
+    SystemPriority = 0x0  //!< Mainly used by ETS for device programming.
 };
 
 enum AckType
 {
-    AckDontCare = 0,
-    AckRequested = 0x2,
+    AckDontCare = 0,    //!< We don't care about DataLinkLayer acknowledgement.
+    AckRequested = 0x2, //!< We want a DataLinkLayer acknowledgement.
 };
 
 enum AddressType
@@ -53,8 +53,8 @@ enum Confirm
 
 enum HopCountType
 {
-    UnlimitedRouting,
-    NetworkLayerParameter
+    UnlimitedRouting,     //!< NPDU::hopCount is set to 7. This means that the frame never expires. This could be a problem if your bus contains a circle.
+    NetworkLayerParameter //!< use NetworkLayer::hopCount as NPDU::hopCount
 };
 
 enum TpduType

src/knx/transport_layer.h

@@ -19,7 +19,7 @@ public:
     TransportLayer(ApplicationLayer& layer, AddressTableObject& gat, Platform& platform);
     void networkLayer(NetworkLayer& layer);
 
-    // from network layer
+#pragma region from network layer
     void dataIndividualIndication(uint16_t destination, HopCountType hopType, Priority priority, uint16_t source, TPDU& tpdu);
     void dataIndividualConfirm(AckType ack, uint16_t destination, HopCountType hopType, Priority priority, TPDU& tpdu, bool status);
     void dataGroupIndication(uint16_t destination, HopCountType hopType, Priority priority, uint16_t source, TPDU& tpdu);
@@ -28,8 +28,25 @@ public:
     void dataBroadcastConfirm(AckType ack, HopCountType hopType, Priority priority, TPDU& tpdu, bool status);
     void dataSystemBroadcastIndication(HopCountType hopType, Priority priority, uint16_t source, TPDU& tpdu);
     void dataSystemBroadcastConfirm(AckType ack, HopCountType hopType, TPDU& tpdu, Priority priority, bool status);
+#pragma endregion
     
-    // fromp application layer
+#pragma region from application layer
+    /**
+     * Request to send an APDU that via multicast. See 3.2 of @cite knx:3/3/4. 
+     * See also ApplicationLayer::dataGroupConfirm and ApplicationLayer::dataGroupIndication. 
+     * This method is called by the ApplicationLayer.
+     * 
+     * @param tsap used the find the correct GroupObject with the help of the AssociationTableObject. 
+     *        See 3.1.1 of @cite knx:3/3/7
+     *        
+     * @param apdu The submitted APDU.
+     * 
+     * @param priority The ::Priority of the request.
+     * 
+     * @param hopType Should routing be endless or should the NetworkLayer::hopCount be used? See also ::HopCountType.
+     * 
+     * @param ack Did we want a DataLinkLayer acknowledgement? See ::AckType.
+     */
     void dataGroupRequest(AckType ack, HopCountType hopType, Priority priority, uint16_t tsap, APDU& apdu);
     void dataBroadcastRequest(AckType ack, HopCountType hopType, Priority priority, APDU& apdu);
     void dataSystemBroadcastRequest(AckType ack, HopCountType hopType, Priority priority, APDU& apdu);
@@ -39,11 +56,14 @@ public:
     void disconnectRequest(uint16_t tsap, Priority priority);
     // apdu must be valid until it was confirmed
     void dataConnectedRequest(uint16_t tsap, Priority priority, APDU& apdu);
+#pragma endregion
 
-    // other
+#pragma region other
     void connectionTimeoutIndication();
     void ackTimeoutIndication();
     void loop();
+#pragma endregion
+    
 private:
 #pragma region States
     Priority _savedPriority = LowPriority;