添加广播方式升级

interface/codec_slave.h

@@ -9,7 +9,7 @@ public:
   codec_slave() : Codec()
   {
   }
-  virtual bool packCheck(myarray data) { return false; }
+  virtual int packCheck(myarray data) { return data.size(); }
   virtual bool recvByte(int byte) { return false; }
   virtual myarray encode(int srcAddr, int dstAddr, int cmd, myarray data);
   virtual myarray decode(int &srcAddr, int &dstAddr, int &cmd, myarray data);