/*

  * GraphLCD driver library

  *

  * port.h  -  parallel port class with low level routines

  *

  * This file is released under the GNU General Public License. Refer

  * to the COPYING file distributed with this package.

  *

  * (c) 2004 Andreas Regel <andreas.regel AT powarman.de>

  */

 #ifndef _GLCDDRIVERS_PORT_H_

 #define _GLCDDRIVERS_PORT_H_

 namespace GLCD

 {

 const int kForward = 0;

 const int kReverse = 1;

 const unsigned char kStrobeHigh = 0x00; // Pin 1

 const unsigned char kStrobeLow  = 0x01;

 const unsigned char kAutoHigh   = 0x00; // Pin 14

 const unsigned char kAutoLow    = 0x02;

 const unsigned char kInitHigh   = 0x04; // Pin 16

 const unsigned char kInitLow    = 0x00;

 const unsigned char kSelectHigh = 0x00; // Pin 17

 const unsigned char kSelectLow  = 0x08;

 class cParallelPort

 {

 private:

     int fd;

     int port;

     bool usePPDev;

 public:

     cParallelPort();

     ~cParallelPort();

     int Open(int port);

     int Open(const char * device);

     int Close();

     bool IsDirectIO() const { return (!usePPDev); }

     int GetPortHandle() const { return ((usePPDev) ? fd : port); }

     void Claim();

     void Release();

     void SetDirection(int direction);

     unsigned char ReadControl();

     void WriteControl(unsigned char values);

     unsigned char ReadStatus();

     unsigned char ReadData();

     void WriteData(unsigned char data);

 };

 class cSerialPort

 {

 private:

     int fd;

 public:

     cSerialPort();

     ~cSerialPort();

     int Open(const char * device);

     int Close();

     int ReadData(unsigned char * data);

     void WriteData(unsigned char data);

     void WriteData(unsigned char * data, unsigned short length);

 };

 } // end of namespace

 #endif