实现赋码仪命令

升级小板程序失败时停止

prot_cmd/cmd_slave.h

@@ -153,6 +153,7 @@ public:
   slave_cmd():HandleBoardCast(){
     send_bytes=0;
     send_pack_num=0;
+    step=0;
   }
   int start(myarray data);
   int dolater(int cmd, myarray data);
@@ -162,6 +163,7 @@ protected:
   int send_bytes;
   int send_pack_num;
   myarray data;
+  int step;
 };