Index: sources/canbus/messageacknowmodel.cpp
===================================================================
diff -u -r939d1bae9a394697d46ca913a2dc3442bf8ef82f -r1ec7b44e6d1d66460d2da943ff65f3c0c0755d8f
--- sources/canbus/messageacknowmodel.cpp	(.../messageacknowmodel.cpp)	(revision 939d1bae9a394697d46ca913a2dc3442bf8ef82f)
+++ sources/canbus/messageacknowmodel.cpp	(.../messageacknowmodel.cpp)	(revision 1ec7b44e6d1d66460d2da943ff65f3c0c0755d8f)
@@ -117,6 +117,16 @@
     moveToThread(qApp->thread());
 }
 
+/*!
+ * \brief   MessageAcknowModel::onAcknowTransmit
+ * \details This slot is called MessageDispatcher sends a message from UI which requires Acknow.
+ *          An Acknow model will be added to list of the Acknow required messages.
+ *          The connection will be made to be notified by that message when it's timed out.
+ *          And the timer for that message will be started.
+ * \param   vCan_Id    - Denali message Can channel
+ * \param   vSequence  - Sequence number of the message which requires Acknow
+ * \param   vFrameList - List of the frames to be sent on retries.
+ */
 void MessageAcknowModel::onAcknowTransmit(Can_Id vCan_Id, Sequence vSequence, const FrameList &vFrameList)
 {
     _acknowList[vSequence] = new Private::AcknowModel(vCan_Id, vSequence, vFrameList);
@@ -127,17 +137,46 @@
     _acknowList[vSequence]->start();
 }
 
+/*!
+ * \brief Private::AcknowModel::start
+ * \details It starts the message timer which is waiting for the Acknow
+ *          on each interval will notify the MessageDispatcher to retry
+ */
+void Private::AcknowModel::start() {
+    _timerId = startTimer(_interval);
+}
+
+/*!
+ * \brief MessageAcknowModel::onAcknowReceive
+ * \details This slot is called when the Acknow request for the specific message with the sequence number vSequence
+ *          has been received.
+ * \param vSequence - Sequence number of the message which required Acknow
+ */
 void MessageAcknowModel::onAcknowReceive(Sequence vSequence)
 {
     _acknowList[vSequence]->deleteLater();
     _acknowList.remove(vSequence);
 }
 
+/*!
+ * \brief   MessageAcknowModel::onFramesTransmit
+ * \details This slot will be called when a message which is waiting for Acknow didn't get the Acknow
+ *          during the interval and retries to transmit the message again.
+ * \param   vCan_Id    - The can channel for the Denali message
+ * \param   vSequence  - The sequence number of the message
+ * \param   vFrameList - The list of the frame(s) needs to be sent.
+ */
 void MessageAcknowModel::onFramesTransmit(Can_Id vCan_Id, Sequence vSequence, const FrameList &vFrameList)
 {
     emit didFramesTransmit(vCan_Id, vSequence, vFrameList);
 }
 
+/*!
+ * \brief   MessageAcknowModel::onFailedTransmit
+ * \details After the _retry amount of retries this slot will be called
+ *          to notify the outside of the failure Acknow.
+ * \param   vSequence - The sequence number of the message
+ */
 void MessageAcknowModel::onFailedTransmit(Sequence vSequence)
 {
     _acknowList[vSequence]->deleteLater();