digi.h

CHAPT05CHAPT05.CPP 16-Bit test program for the initelligent Digi board. CHAPT05CHAPT05.EXE 16-Bit e

//
//  DIGI.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 the definitions and prototypes needed
// to use the Digiboard classes.

#ifndef _DIGI_DOT_H
#define _DIGI_DOT_H

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

// A few type definitions used with this class.

enum DigiBoardError {
    DIGIBOARD_DRIVER_NOT_FOUND        = RS232_NEXT_FREE_ERROR,
    DIGIBOARD_NEXT_FREE_ERROR,
    DIGIBOARD_NEXT_FREE_WARNING       = RS232_NEXT_FREE_WARNING };

class DigiBoard : public RS232
{
    private :
        int line_status;
        int first_debug_output_line;
        void read_settings( void );
        RS232Error write_settings( void );
        int valid_port( 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 );

    public :
        DigiBoard( 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 ~DigiBoard( 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 Break( long milliseconds = 300 );
        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 XonXoffHandshaking( int setting = UNCHANGED );
        virtual int RtsCtsHandshaking( int setting = UNCHANGED );
        virtual int DtrDsrHandshaking( int setting = UNCHANGED );
        virtual int Dtr( int setting = UNCHANGED );
        virtual int Rts( int setting = UNCHANGED );
        virtual int PeekBuffer( void *buffer, unsigned int count );
        virtual int RXSpaceFree( void );
        virtual int TXSpaceUsed( void );
        virtual int FlushRXBuffer( void );
        virtual int FlushTXBuffer( void );
        virtual char * ErrorName( int error );
        virtual int FormatDebugOutput( char *buffer = 0,
                                       int line_number = -1 );
};

#endif // #ifndef _DIGI_DOT_H

// ************************ END OF DIGI.H ***********************