doc for mqm improved

ipc/MessageQueueMessageIF.h

@@ -11,7 +11,9 @@
  * lookup of queueIDs for every call does not sound ideal.
  * In a first step, I'll circumvent the issue by not touching it,
  * maybe in a second step. This also influences Interface design
- * (getCommandQueue) and some other issues.. */
+ * (getCommandQueue) and some other issues..
+ */
+
 typedef uint32_t MessageQueueId_t;
 
 class MessageQueueMessageIF {
@@ -25,14 +27,9 @@ public:
 	 * 			size is set to zero.
 	 */
 	virtual void clear() = 0;
-//	/**
-//	 * @brief	This is a debug method that prints the content
-//	 * 			(till messageSize) to the debug output.
-//	 */
-//	virtual void print() = 0;
 
 	/**
-	 * @brief	Get read-only pointer to the raw buffer.
+	 * @brief	Get read-only pointer to the complete data of the message.
 	 * @return
 	 */
 	virtual const uint8_t* getBuffer() const = 0;
@@ -50,8 +47,25 @@ public:
 	 */
 	virtual void setSender(MessageQueueId_t setId) = 0;
 
+	/**
+	 * @brief	This method is used to extract the sender's message queue id
+	 * 			information from a received message.
+	 */
 	virtual MessageQueueId_t getSender() const = 0;
 
+	/**
+	 * @brief	This method is used to fetch the data content of the message.
+	 * @details
+	 * It shall be used by child classes to add data at the right position.
+	 */
+	virtual const uint8_t* getData() const = 0;
+	/**
+	 * @brief	This method is used to fetch the data content of the message.
+	 * @details
+	 * It shall be used by child classes to add data at the right position.
+	 */
+	virtual uint8_t* getData() = 0;
+
 	/**
 	 * @brief	This helper function is used by the MessageQueue class to
 	 * 			check the size of an incoming message.