SerialIO.h

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/*
 * Copyright 2017 Fraunhofer Institute for Manufacturing Engineering and Automation (IPA)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
 
#ifndef _SerialIO_H
#define _SerialIO_H
 
#include <termios.h>
#include <sys/select.h>
 
#include <string>
 
class SerialIO
{
public:
        // ---------------------- Constants
        enum HandshakeFlags
        {
                HS_NONE,
                HS_HARDWARE,
                HS_XONXOFF
        };
 
        enum ParityFlags
        {
                PA_NONE,
                PA_EVEN,
                PA_ODD,
// UNIX serial drivers only support even, odd, and no parity bit generation.
                PA_MARK,
                PA_SPACE
        };
 
        enum StopBits
        {
                SB_ONE,
                SB_ONE_5, // ????? returns an error ?????
                SB_TWO
        };
 
        SerialIO();
 
        virtual ~SerialIO();
 
        void setDeviceName(const char *Name) { m_DeviceName = Name; }
 
        void setBaudRate(int BaudRate) { m_BaudRate = BaudRate; }
 
        void changeBaudRate(int BaudRate);
 
        void setMultiplier(double Multiplier = 1) { m_Multiplier = Multiplier; };
 
        void SetFormat(int ByteSize, ParityFlags Parity, int StopBits)
                { m_ByteSize = ByteSize; m_Parity = Parity; m_StopBits = StopBits; }
 
        void setHandshake(HandshakeFlags Handshake) { m_Handshake = Handshake; }
 
        void setBufferSize(int ReadBufSize, int WriteBufSize)
                { m_ReadBufSize = ReadBufSize; m_WriteBufSize = WriteBufSize; }
 
        void setTimeout(double Timeout);
 
        void setBytePeriod(double Period);
 
        int openIO();
 
        void closeIO();
 
        int readBlocking(char *Buffer, int Length);
 
 
        int readNonBlocking(char *Buffer, int Length);
 
        int writeIO(const char *Buffer, int Length);
 
        int getSizeRXQueue();
 
 
        void purge()
        {
                ::tcflush(m_Device, TCIOFLUSH);
        }
 
        void purgeRx() {
                tcflush(m_Device, TCIFLUSH);
}
 
        void purgeTx() {
                tcflush(m_Device, TCOFLUSH);
        }
 
        void flushTx() {
                tcdrain(m_Device);
        }
 
protected:
        ::termios m_tio;
        std::string m_DeviceName;
        int m_Device;
        int m_BaudRate;
        double m_Multiplier;
        int m_ByteSize, m_StopBits;
        ParityFlags m_Parity;
        HandshakeFlags m_Handshake;
        int m_ReadBufSize, m_WriteBufSize;
        double m_Timeout;
        ::timeval m_BytePeriod;
        bool m_ShortBytePeriod;
};
 
 
#endif //