biosport.h

CHAPT06CHAPT06.CPP 16-Bit test program for the BiosPort class CHAPT06CHAPT06.EXE 16-Bit executable

// ********************** START OF BIOSPORT.H **********************
//
//  Source code from:
//
//  Serial Communications: A C++ Developer's Guide, 2nd Edition
//  by Mark Nelson, IDG Books, 1999
//
//  Please see the book for information on usage.
//
//
//  This header file has all of the definitions and prototypes
//  needed to use the BIOSPort and EBIOSPort classes.  This file
//  should be included by and module that needs to access either
//  of the classes.

#ifndef _BIOSPORT_DOT_H
#define _BIOSPORT_DOT_H

#include <dos.h>
#include "rs232.h"

class BIOSPort : public RS232
{
    protected :
        int line_status;
        int first_debug_output_line;
        RS232Error write_settings( void );
        virtual int read_buffer( char *buffer,
                                 unsigned int count );
        virtual int write_buffer( char *buffer,
                                  unsigned int count = -1 );
        virtual int read_byte( void );
        virtual int write_byte( int c );
        BIOSPort( void );

    public :
        BIOSPort( enum RS232PortName port_name,
                  long baud_rate = UNCHANGED,
                  char parity = UNCHANGED,
                  int word_length = UNCHANGED,
                  int stop_bits = UNCHANGED,
                  int dtr = SET,
                  int rts = SET,
                  int xon_xoff = DISABLE,
                  int rts_cts = DISABLE,
                  int dtr_dsr = DISABLE );
        virtual ~BIOSPort( void );
        virtual RS232Error Set( long baud_rate = UNCHANGED,
                                int parity = UNCHANGED,
                                int word_length = UNCHANGED,
                                int stop_bits = UNCHANGED );
        virtual int TXSpaceFree( void );
        virtual int RXSpaceUsed( void );
        virtual int Cd( void );
        virtual int Ri( void );
        virtual int Cts( void );
        virtual int Dsr( void );
        virtual int ParityError( int clear = UNCHANGED );
        virtual int BreakDetect( int clear = UNCHANGED );
        virtual int FramingError( int clear = UNCHANGED );
        virtual int HardwareOverrunError( int clear = UNCHANGED );
        virtual int FormatDebugOutput( char *buffer = 0,
                                       int line_number = -1 );
};

class EBIOSPort : public BIOSPort
{
    protected :
        RS232Error write_settings( void );
        void read_settings( void );
        int first_debug_output_line;
        int break_on;

    public :
        EBIOSPort( enum RS232PortName port_name,
                   long baud_rate = UNCHANGED,
                   char parity = UNCHANGED,
                   int word_length = UNCHANGED,
                   int stop_bits = UNCHANGED,
                   int dtr = SET,
                   int rts = SET,
                   int xon_xoff = DISABLE,
                   int rts_cts = DISABLE,
                   int dtr_dsr = DISABLE );
        ~EBIOSPort( void );
        virtual RS232Error Set( long baud_rate = UNCHANGED,
                                int parity = UNCHANGED,
                                int word_length = UNCHANGED,
                                int stop_bits = UNCHANGED );
        virtual int Break( long milliseconds = 300 );
        virtual int Dtr( int setting = UNCHANGED );
        virtual int Rts( int setting = UNCHANGED );
        virtual int FormatDebugOutput( char *buffer = 0,
                                       int line_number = -1 );
};

#endif // #ifndef _BIOSPORT_DOT_H

// ************************ END OF BIOSPORT.H ***********************