Add initial support for the Nextion display.

Nextion.h

@@ -0,0 +1,61 @@
+/*
+ *   Copyright (C) 2016 by Jonathan Naylor G4KLX
+ *
+ *   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.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#if !defined(NEXTION_H)
+#define	NEXTION_H
+
+#include "Display.h"
+#include "SerialController.h"
+
+#include <string>
+
+class CNextion : public IDisplay
+{
+public:
+  CNextion(const std::string& port, unsigned int brightness);
+  virtual ~CNextion();
+
+  virtual bool open();
+
+  virtual void setIdle();
+
+  virtual void setError(const char* text);
+  virtual void setLockout();
+
+  virtual void setDStar();
+  virtual void writeDStar(const char* my1, const char* my2, const char* your);
+  virtual void clearDStar();
+
+  virtual void setDMR();
+  virtual void writeDMR(unsigned int slotNo, unsigned int srdId, bool group, unsigned int dstId, const char* type);
+  virtual void clearDMR(unsigned int slotNo);
+
+  virtual void setFusion();
+  virtual void writeFusion(const char* source, const char* dest);
+  virtual void clearFusion();
+
+  virtual void close();
+
+private:
+  CSerialController m_serial;
+  unsigned int      m_brightness;
+
+  void sendCommand(const char* command);
+};
+
+#endif