Changed the way the filter system works in the CAN connection objects - now used only for sending frames immediately to relevant objects. Tested to work in firmware updater. Currently broken elsewhere. Also switched main frame update interval from 4 times per second to 8 to make things smoother.

connections/canconmanager.h

@@ -36,12 +36,30 @@ public:
     //just the multi-frame version of above function.
     bool sendFrames(const QList<CANFrame>& pFrames);
 
+    /**
+     * @brief Add a new filter for the targetted frames. If a frame matches it will immediately be sent via the targettedFrameReceived signal
+     * @param pBusId - Which bus to bond to. -1 for any, otherwise a bitfield of buses (but 0 = first bus, etc)
+     * @param target - The filter to use for selected targetted frames
+     * @return true if filter was able to be added, false otherwise.
+     */
+    bool addTargettedFrame(int pBusId, const CANFlt &target);
+
+    /**
+     * @brief Try to find a matching filter in the list and remove it, no longer targetting those frames
+     * @param pBusId - Which bus to bond to. Doesn't have to match the call to addTargettedFrame exactly. You could disconnect just one bus for instance.
+     * @param target - The filter that was set
+     * @return true if filter was found and deleted, false otherwise.
+     */
+    bool removeTargettedFrame(int pBusId, const CANFlt &target);
+
 signals:
     void framesReceived(CANConnection* pConn_p, QVector<CANFrame>& pFrames);
+    void targettedFrameReceived(CANFrame frame);
     void connectionStatusUpdated(int conns);
 
 private slots:
-        void refreshCanList();
+    void refreshCanList();
+    void gotTargettedFrame(CANFrame frame);
 
 private:
     explicit CANConManager(QObject *parent = 0);