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////////////////////////////////////////////////////////////////////////////////

//

//

// Filename:    llcomms.cpp

//

// Project:     UART to WISHBONE FPGA library

//

// Purpose:     This is the C++ program on the command side that will interact

//              with a UART on an FPGA, both sending and receiving characters.

//              Any bus interaction will call routines from this lower level

//              library to accomplish the actual connection to and

//              transmission to/from the board.

//

// Creator:     Dan Gisselquist

//              Gisselquist Tecnology, LLC

//

// Copyright:   2015

//

//

#ifndef LLCOMMS_H

#define LLCOMMS_H

class   LLCOMMSI {

protected:

        int     m_fdw, m_fdr;

        LLCOMMSI(void);

public:

        unsigned long   m_total_nread, m_total_nwrit;

        virtual ~LLCOMMSI(void) { close(); }

        virtual void    kill(void)  { this->close(); };

        virtual void    close(void);

        virtual void    write(char *buf, int len);

        virtual int     read(char *buf, int len);

        virtual bool    poll(unsigned ms);

        // Tests whether or not bytes are available to be read, returns a 

        // count of the bytes that may be immediately read

        virtual int     available(void); // { return 0; };

};

class   TTYCOMMS : public LLCOMMSI {

public:

        TTYCOMMS(const char *dev);

};

class   NETCOMMS : public LLCOMMSI {

public:

        NETCOMMS(const char *dev, const int port);

};

#endif