add dual state button component support

Signed-off-by: xianminghuang <xianming.huang@itead.cc>

NexDualStateButton.cpp

@@ -0,0 +1,46 @@
+/**
+ * @file NexDualStateButton.cpp
+ *
+ * The implementation of class NexDSButton. 
+ *
+ * @author  huang xianming (email:<xianming.huang@itead.cc>)
+ * @date    2015/11/11
+ * @copyright 
+ * Copyright (C) 2014-2015 ITEAD Intelligent Systems Co., Ltd. \n
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include "NexDualStateButton.h"
+
+NexDSButton::NexDSButton(uint8_t pid, uint8_t cid, const char *name)
+    :NexTouch(pid, cid, name)
+{
+}
+
+bool NexDSButton::getValue(uint32_t *number)
+{
+    String cmd = String("get ");
+    cmd += getObjName();
+    cmd += ".val";
+    sendCommand(cmd.c_str());
+    return recvRetNumber(number);
+}
+
+bool NexDSButton::setValue(uint32_t number)
+{
+    char buf[10] = {0};
+    String cmd;
+    
+    utoa(number, buf, 10);
+    cmd += getObjName();
+    cmd += ".val=";
+    cmd += buf;
+
+    sendCommand(cmd.c_str());
+    return recvRetCommandFinished();
+}
+
+