gsd_dsm/3rdparty/CSerialPort/SerialPortUnixBase.h

/**
 * @file SerialPortUnixBase.h
 * @author itas109 (itas109@qq.com) \n\n
 * Blog : https://blog.csdn.net/itas109 \n
 * Github : https://github.com/itas109 \n
 * QQ Group : 12951803
 * @brief the CSerialPort unix Base class unix串口基类
 * @date 2020-04-29
 * @copyright The CSerialPort is Copyright (C) 2021 itas109. \n
 * Contact: itas109@qq.com \n\n
 *  You may use, distribute and copy the CSerialPort under the terms of \n
 *  GNU Lesser General Public License version 3, which is displayed below.
 */
#ifndef __CSERIALPORTUNIXBASE_H__
#define __CSERIALPORTUNIXBASE_H__

#include "SerialPortBase.h"

#include <errno.h>   /* Error number definitions */
#include <fcntl.h>   /* File control definitions */
#include <stdio.h>   /* Standard input/output definitions */
#include <string.h>  /* String function definitions */
#include <termios.h> /* POSIX terminal control definitions */
#include <unistd.h>  /* UNIX standard function definitions */

#include <sys/ioctl.h> //ioctl

// Serial Programming Guide for POSIX Operating Systems
// https://digilander.libero.it/robang/rubrica/serial.htm
// https://blog.csdn.net/u014650722/article/details/51610587

// sigslot
// https://sourceforge.net/p/sigslot/bugs/8/
#include "sigslot.h"

// https://blog.csdn.net/u010317005/article/details/52384890

// Linux compile 1
// g++ SerialPort.cpp SerialPortBase.cpp SerialPortUnixBase.cpp -fPIC -lpthread -shared -o libsp.so
// g++ t.cpp -o sp -L. -lsp
// export LD_LIBRARY_PATH=./
// ./sp

// Linux compile 2
// g++ sp.cpp SerialPort.cpp SerialPortBase.cpp SerialPortUnixBase.cpp -lpthread -o sp
// ./sp

// sp.cpp
/*
#include <iostream>

#include "SerialPort.h"
#include "sigslot.h"

using namespace itas109;
using namespace std;

int main()
{
    CSerialPort sp;
    sp.init("/dev/ttyS0");
    sp.open();
    cout << sp.isOpened() <<endl;

    while (1);
    return 0;
}
*/

/**
 * @brief the CSerialPort unix Base class unix串口基类
 * @see inherit 继承 CSerialPortBase
 *
 */
class CSerialPortUnixBase : public CSerialPortBase
{
public:
    /**
     * @brief Construct a new CSerialPortUnixBase object 构造函数
     *
     */
    CSerialPortUnixBase(){
        construct();
    }
    /**
     * @brief Construct a new CSerialPortUnixBase object 通过串口名称构造函数
     *
     * @param portName [in] the port name 串口名称 Windows:COM1 Linux:/dev/ttyS0
     */
    CSerialPortUnixBase(const std::string &portName){
        construct();
    }
    /**
     * @brief Destroy the CSerialPortUnixBase object 析构函数
     *
     */
    virtual ~CSerialPortUnixBase(){
        pthread_mutex_destroy(&m_communicationMutex);
    }

    /**
     * @brief parameter init 参数初始化
     *
     */
    virtual void construct(){
        fd = -1;

        m_baudRate = itas109::BaudRate9600;
        m_parity = itas109::ParityNone;
        m_dataBits = itas109::DataBits8;
        m_stopbits = itas109::StopOne;
        m_flowControl = itas109::FlowNone;
        m_readBufferSize = 512;

        m_isThreadRunning = false;

        m_operateMode = itas109::AsynchronousOperate;

        pthread_mutex_init(&m_communicationMutex, NULL);
    }

    /**
     * @brief init 初始化函数
     *
     * @param portName [in] the port name串口名称 Windows:COM1 Linux:/dev/ttyS0
     * @param baudRate [in] the baudRate 波特率
     * @param parity [in] the parity 校验位
     * @param dataBits [in] the dataBits 数据位
     * @param stopbits [in] the stopbits 停止位
     * @param flowControl [in] flowControl type 流控制
     * @param readBufferSize [in] the read buffer size 读取缓冲区大小
     */
    virtual void init(std::string portName,
                      int baudRate = itas109::BaudRate9600,
                      itas109::Parity parity = itas109::ParityNone,
                      itas109::DataBits dataBits = itas109::DataBits8,
                      itas109::StopBits stopbits = itas109::StopOne,
                      itas109::FlowControl flowControl = itas109::FlowNone,
                      int64_t readBufferSize = 512){
                        m_portName = portName; // portName;//串口 /dev/ttySn, USB /dev/ttyUSBn
                        m_baudRate = baudRate;
                        m_parity = parity;
                        m_dataBits = dataBits;
                        m_stopbits = stopbits;
                        m_flowControl = flowControl;
                        m_readBufferSize = readBufferSize;
                      }

    /**
     * @brief open serial port 打开串口
     *
     * @return
     * @retval true open success 打开成功
     * @retval false open failed 打开失败
     */
    virtual bool openPort(){
            bool bRet = false;

            lock();

            // fd = open(m_portName.c_str(),O_RDWR | O_NOCTTY);//阻塞

            fd = open(m_portName.c_str(), O_RDWR | O_NOCTTY | O_NDELAY); //非阻塞

            if (fd != -1)
            {
                // if(fcntl(fd,F_SETFL,FNDELAY) >= 0)//非阻塞，覆盖前面open的属性
                if (fcntl(fd, F_SETFL, 0) >= 0) // 阻塞，即使前面在open串口设备时设置的是非阻塞的，这里设为阻塞后，以此为准
                {
                    // set param
                    if (uart_set(fd, m_baudRate, m_parity, m_dataBits, m_stopbits, m_flowControl) == -1)
                    {
                        fprintf(stderr, "uart set failed!\n");
                        // exit(EXIT_FAILURE);

                        bRet = false;
                        lastError = itas109::/*SerialPortError::*/ InvalidParameterError;
                    }
                    else
                    {
                        m_isThreadRunning = true;
                        bRet = startThreadMonitor();

                        if (!bRet)
                        {
                            m_isThreadRunning = false;
                            lastError = itas109::/*SerialPortError::*/ SystemError;
                        }
                    }
                }
                else
                {
                    bRet = false;
                    lastError = itas109::/*SerialPortError::*/ SystemError;
                }
            }
            else
            {
                // Could not open the port
                char str[256];
                snprintf(str, sizeof(str), "open port error: Unable to open %s", m_portName.c_str());
                perror(str);

                bRet = false;
                lastError = itas109::/*SerialPortError::*/ OpenError;
            }

            if (!bRet)
            {
                closePort();
            }

            unlock();

            return bRet;
    }
    /**
     * @brief close 关闭串口
     *
     */
    virtual void closePort(){
        if (isOpened())
        {
            stopThreadMonitor();

            close(fd);

            fd = -1;
        }
    }

    /**
     * @brief if serial port is open success 串口是否打开成功
     *
     * @return
     * @retval true serial port open success 串口打开成功
     * @retval false serial port open failed 串口打开失败
     */
    virtual bool isOpened(){
        return fd != -1;
    }

    /**
     * @brief read specified length data 读取指定长度数据
     *
     * @param data [out] read data result 读取结果
     * @param maxSize [in] read length 读取长度
     * @return return number Of bytes read 返回读取字节数
     * @retval -1 read error 读取错误
     * @retval [other] return number Of bytes read 返回读取字节数
     */
    virtual int readData(char *data, int maxSize){
        int iRet = -1;
        lock();

        if (isOpened())
        {
            iRet = read(fd, data, maxSize);
        }
        else
        {
            lastError = itas109::/*SerialPortError::*/ NotOpenError;
            iRet = -1;
        }

        unlock();

        return iRet;
    }
    /**
     * @brief read all data 读取所有数据
     *
     * @param data [out] read data result 读取结果
     * @return return number Of bytes read 返回读取字节数
     * @retval -1 read error 读取错误
     * @retval [other] return number Of bytes read 返回读取字节数
     */
    virtual int readAllData(char *data){
        int readbytes = 0;

        // read前获取可读的字节数,不区分阻塞和非阻塞
        ioctl(fd, FIONREAD, &readbytes);

        return readData(data, readbytes);
    }
    /**
     * @brief read line data 读取一行字符串
     * @todo Not implemented 未实现
     *
     * @param data
     * @param maxSize
     * @return int
     */
    virtual int readLineData(char *data, int maxSize){
            int iRet = -1;
            lock();

            if (isOpened())
            {
            }
            else
            {
                lastError = itas109::/*SerialPortError::*/ NotOpenError;
                iRet = -1;
            }

            unlock();

            return iRet;
    }
    /**
     * @brief write specified lenfth data 写入指定长度数据
     *
     * @param data [in] write data 待写入数据
     * @param maxSize [in] wtite length 写入长度
     * @return return number Of bytes write 返回写入字节数
     * @retval -1 read error 写入错误
     * @retval [other] return number Of bytes write 返回写入字节数
     */
    virtual int writeData(const char *data, int maxSize){
        int iRet = -1;
        // lock();

        if (isOpened())
        {
            // Write N bytes of BUF to FD.  Return the number written, or -1
            iRet = write(fd, data, maxSize);
        }
        else
        {
            lastError = itas109::/*SerialPortError::*/ NotOpenError;
            iRet = -1;
        }

        // unlock();

        return iRet;
    }

    /**
     * @brief Set Debug Model 设置调试模式
     * @details output serial port read and write details info 输出串口读写的详细信息
     * @todo  Not implemented 未实现
     *
     * @param isDebug true if enable true为启用
     */
    virtual void setDebugModel(bool isDebug){

    }

    /**
     * @brief Set the Read Time Interval object
     * @details use timer import effectiveness 使用定时器提高效率
     * @todo  Not implemented 未实现
     *
     * @param msecs read time micro second 读取间隔时间，单位：毫秒
     */
    virtual void setReadTimeInterval(int msecs){

    }

    /**
     * @brief setMinByteReadNotify set minimum byte of read notify 设置读取通知触发最小字节数
     * @param minByteReadNotify minimum byte of read notify 读取通知触发最小字节数
     */
    virtual void setMinByteReadNotify(unsigned int minByteReadNotify = 2){
        m_minByteReadNotify = minByteReadNotify;
    }

    /**
     * @brief Get the Last Error object 获取最后的错误代码
     *
     * @return return last error code, refrence {@link itas109::SerialPortError} 错误代码
     */
    virtual int getLastError() const{
        return lastError;
    }
    /**
     * @brief clear error 清除错误信息
     *
     */
    virtual void clearError(){
        lastError = itas109::NoError;
    }

    /**
     * @brief Set the Port Name object 设置串口名称
     *
     * @param portName [in] the port name 串口名称 Windows:COM1 Linux:/dev/ttyS0
     */
    virtual void setPortName(std::string portName){
        m_portName = portName;
    }
    /**
     * @brief Get the Port Name object 获取串口名称
     *
     * @return return port name 返回串口名称
     */
    virtual std::string getPortName() const{
        return m_portName;
    }

    /**
     * @brief Set the Baud Rate object 设置波特率
     *
     * @param baudRate [in] the baudRate 波特率
     */
    virtual void setBaudRate(int baudRate){
        m_baudRate = baudRate;
    }
    /**
     * @brief Get the Baud Rate object 获取波特率
     *
     * @return return baudRate 返回波特率
     */
    virtual int getBaudRate() const{
        return m_baudRate;
    }

    /**
     * @brief Set the Parity object 设置校验位
     *
     * @param parity [in] the parity 校验位 {@link itas109::Parity}
     */
    virtual void setParity(itas109::Parity parity){
        m_parity = parity;
    }
    /**
     * @brief Get the Parity object 获取校验位
     *
     * @return return parity 返回校验位 {@link itas109::Parity}
     */
    virtual itas109::Parity getParity() const{
        return m_parity;
    }
    /**
     * @brief Set the Data Bits object 设置数据位
     *
     * @param dataBits [in] the dataBits 数据位 {@link itas109::DataBits}
     */
    virtual void setDataBits(itas109::DataBits dataBits){
         m_dataBits = dataBits;
    }
    /**
     * @brief Get the Data Bits object 获取数据位
     *
     * @return return dataBits 返回数据位 {@link itas109::DataBits}
     */
    virtual itas109::DataBits getDataBits() const{
        return m_dataBits;
    }

    /**
     * @brief Set the Stop Bits object 设置停止位
     *
     * @param stopbits [in] the stopbits 停止位 {@link itas109::StopBits}
     */
    virtual void setStopBits(itas109::StopBits stopbits){
        m_stopbits = stopbits;
    }
    /**
     * @brief Get the Stop Bits object 获取停止位
     *
     * @return return stopbits 返回停止位 {@link itas109::StopBits}
     */
    virtual itas109::StopBits getStopBits() const{
        return m_stopbits;
    }

    /**
     * @brief Set the Flow Control object 设置流控制
     * @todo Not implemented 未实现
     *
     * @param flowControl [in]
     */
    virtual void setFlowControl(itas109::FlowControl flowControl){
        m_flowControl = flowControl;
    }
    /**
     * @brief Get the Flow Control object 获取流控制
     * @todo Not implemented 未实现
     *
     * @return itas109::FlowControl
     */
    virtual itas109::FlowControl getFlowControl() const{
        return m_flowControl;
    }

    /**
     * @brief Set the Read Buffer Size object 设置读取缓冲区大小
     *
     * @param size [in] read buffer size 读取缓冲区大小
     */
    virtual void setReadBufferSize(int64_t size){
        m_readBufferSize = size;
    }
    /**
     * @brief Get the Read Buffer Size object 获取读取缓冲区大小
     *
     * @return return read buffer size 返回读取缓冲区大小
     */
    virtual int64_t getReadBufferSize() const{
         return m_readBufferSize;
    }

    /**
     * @brief Set the Dtr object 设置DTR
     * @todo Not implemented 未实现
     *
     * @param set [in]
     */
    virtual void setDtr(bool set = true){}
    /**
     * @brief Set the Rts object 设置RTS
     * @todo Not implemented 未实现
     *
     * @param set [in]
     */
    virtual void setRts(bool set = true){}

    /**
     * @brief Get the Version object 获取版本信息
     *
     * @return return version 返回版本信息
     */
    std::string getVersion(){
        std::string m_version = "CSerialPortUnixBase V1.0.1.190728";
        return m_version;
    }

public:
    /**
     * @brief isThreadRunning 是否启动多线程
     * @return
     * @retval true thread running 多线程已启动
     * @retval false thread not running 多线程未启动
     */
    bool isThreadRunning(){
        return m_isThreadRunning;
    }

private:
    /**
     * @brief lock 锁
     *
     */
    void lock(){
        pthread_mutex_lock(&m_communicationMutex);
    }
    /**
     * @brief unlock 解锁
     *
     */
    void unlock(){
        pthread_mutex_unlock(&m_communicationMutex);
    }

    /**
     * @brief rate2Constant baudrate to constant 波特率转为unix常量
     * @param baudrate 波特率
     * @return constant unix常量
     */
    int rate2Constant(int baudrate){
            // https://jim.sh/ftx/files/linux-custom-baudrate.c

        #define B(x) \
            case x:  \
                return B##x

            switch (baudrate)
            {
                #ifdef B50
                        B(50);
                #endif
                #ifdef B75
                        B(75);
                #endif
                #ifdef B110
                        B(110);
                #endif
                #ifdef B134
                        B(134);
                #endif
                #ifdef B150
                        B(150);
                #endif
                #ifdef B200
                        B(200);
                #endif
                #ifdef B300
                        B(300);
                #endif
                #ifdef B600
                        B(600);
                #endif
                #ifdef B1200
                        B(1200);
                #endif
                #ifdef B1800
                        B(1800);
                #endif
                #ifdef B2400
                        B(2400);
                #endif
                #ifdef B4800
                        B(4800);
                #endif
                #ifdef B9600
                        B(9600);
                #endif
                #ifdef B19200
                        B(19200);
                #endif
                #ifdef B38400
                        B(38400);
                #endif
                #ifdef B57600
                        B(57600);
                #endif
                #ifdef B115200
                        B(115200);
                #endif
                #ifdef B230400
                        B(230400);
                #endif
                #ifdef B460800
                        B(460800);
                #endif
                #ifdef B500000
                        B(500000);
                #endif
                #ifdef B576000
                        B(576000);
                #endif
                #ifdef B921600
                        B(921600);
                #endif
                #ifdef B1000000
                        B(1000000);
                #endif
                #ifdef B1152000
                        B(1152000);
                #endif
                #ifdef B1500000
                        B(1500000);
                #endif
                #ifdef B2000000
                        B(2000000);
                #endif
                #ifdef B2500000
                        B(2500000);
                #endif
                #ifdef B3000000
                        B(3000000);
                #endif
                #ifdef B3500000
                        B(3500000);
                #endif
                #ifdef B4000000
                        B(4000000);
                #endif

                        default:
                            return 0;
                    }

                #undef B
    }

    /**
     * @brief uart_set
     * @param fd
     * @param baude
     * @param c_flow
     * @param bits
     * @param parity
     * @param stop
     * @return 0 success -1 error
     */
    int uart_set(int fd,
                 int baudRate = itas109::BaudRate9600,
                 itas109::Parity parity = itas109::ParityNone,
                 itas109::DataBits dataBits = itas109::DataBits8,
                 itas109::StopBits stopbits = itas109::StopOne,
                 itas109::FlowControl flowControl = itas109::FlowNone){
                      struct termios options;

                //获取终端属性
                if (tcgetattr(fd, &options) < 0)
                {
                    perror("tcgetattr error");
                    return -1;
                }

                //设置输入输出波特率
                int baudRateConstant = 0;
                baudRateConstant = rate2Constant(baudRate);

                if (0 != baudRateConstant)
                {
                    cfsetispeed(&options, baudRateConstant);
                    cfsetospeed(&options, baudRateConstant);
                }
                else
                {
                    // TODO: custom baudrate
                    fprintf(stderr, "Unkown baudrate!\n");
                    return -1;
                }

                //设置校验位
                switch (parity)
                {
                    /*无奇偶校验位*/
                    case itas109::ParityNone:
                    case 'N':
                        options.c_cflag &= ~PARENB; // PARENB：产生奇偶位，执行奇偶校验
                        options.c_cflag &= ~INPCK;  // INPCK：使奇偶校验起作用
                        break;
                    /*设置奇校验*/
                    case itas109::ParityOdd:
                        options.c_cflag |= PARENB; // PARENB：产生奇偶位，执行奇偶校验
                        options.c_cflag |= PARODD; // PARODD：若设置则为奇校验,否则为偶校验
                        options.c_cflag |= INPCK;  // INPCK：使奇偶校验起作用
                        options.c_cflag |= ISTRIP; // ISTRIP：若设置则有效输入数字被剥离7个字节，否则保留全部8位
                        break;
                    /*设置偶校验*/
                    case itas109::ParityEven:
                        options.c_cflag |= PARENB;  // PARENB：产生奇偶位，执行奇偶校验
                        options.c_cflag &= ~PARODD; // PARODD：若设置则为奇校验,否则为偶校验
                        options.c_cflag |= INPCK;   // INPCK：使奇偶校验起作用
                        options.c_cflag |= ISTRIP; // ISTRIP：若设置则有效输入数字被剥离7个字节，否则保留全部8位
                        break;
                        /*设为空格,即停止位为2位*/
                    case itas109::ParitySpace:
                        options.c_cflag &= ~PARENB; // PARENB：产生奇偶位，执行奇偶校验
                        options.c_cflag &= ~CSTOPB; // CSTOPB：使用两位停止位
                        break;
                    default:
                        fprintf(stderr, "Unkown parity!\n");
                        return -1;
                }

                //设置数据位
                switch (dataBits)
                {
                    case itas109::DataBits5:
                        options.c_cflag &= ~CSIZE; //屏蔽其它标志位
                        options.c_cflag |= CS5;
                        break;
                    case itas109::DataBits6:
                        options.c_cflag &= ~CSIZE; //屏蔽其它标志位
                        options.c_cflag |= CS6;
                        break;
                    case itas109::DataBits7:
                        options.c_cflag &= ~CSIZE; //屏蔽其它标志位
                        options.c_cflag |= CS7;
                        break;
                    case itas109::DataBits8:
                        options.c_cflag &= ~CSIZE; //屏蔽其它标志位
                        options.c_cflag |= CS8;
                        break;
                    default:
                        fprintf(stderr, "Unkown bits!\n");
                        return -1;
                }

                //停止位
                switch (stopbits)
                {
                    case itas109::StopOne:
                        options.c_cflag &= ~CSTOPB; // CSTOPB：使用两位停止位
                        break;
                    case itas109::StopOneAndHalf:
                        fprintf(stderr, "POSIX does not support 1.5 stop bits!\n");
                        return -1;
                    case itas109::StopTwo:
                        options.c_cflag |= CSTOPB; // CSTOPB：使用两位停止位
                        break;
                    default:
                        fprintf(stderr, "Unkown stop!\n");
                        return -1;
                }

                //控制模式
                options.c_cflag |= CLOCAL; //保证程序不占用串口
                options.c_cflag |= CREAD;  //保证程序可以从串口中读取数据

                //流控制
                switch (flowControl)
                {
                    case itas109::FlowNone: ///< No flow control 无流控制
                        options.c_cflag &= ~CRTSCTS;
                        break;
                    case itas109::FlowHardware: ///< Hardware(RTS / CTS) flow control 硬件流控制
                        options.c_cflag |= CRTSCTS;
                        break;
                    case itas109::FlowSoftware: ///< Software(XON / XOFF) flow control 软件流控制
                        options.c_cflag |= IXON | IXOFF | IXANY;
                        break;
                    default:
                        fprintf(stderr, "Unkown c_flow!\n");
                        return -1;
                }

                //设置输出模式为原始输出
                options.c_oflag &= ~OPOST; // OPOST：若设置则按定义的输出处理，否则所有c_oflag失效

                //设置本地模式为原始模式
                options.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
                /*
                *ICANON：允许规范模式进行输入处理
                *ECHO：允许输入字符的本地回显
                *ECHOE：在接收EPASE时执行Backspace,Space,Backspace组合
                *ISIG：允许信号
                */

                options.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
                /*
                *BRKINT：如果设置了IGNBRK，BREAK键输入将被忽略
                *ICRNL：将输入的回车转化成换行（如果IGNCR未设置的情况下）(0x0d => 0x0a)
                *INPCK：允许输入奇偶校验
                *ISTRIP：去除字符的第8个比特
                *IXON：允许输出时对XON/XOFF流进行控制 (0x11 0x13)
                */

                //设置等待时间和最小接受字符
                options.c_cc[VTIME] = 0; //可以在select中设置
                options.c_cc[VMIN] = 1;  //最少读取一个字符

                //如果发生数据溢出，只接受数据，但是不进行读操作
                tcflush(fd, TCIFLUSH);

                //激活配置
                if (tcsetattr(fd, TCSANOW, &options) < 0)
                {
                    perror("tcsetattr failed");
                    return -1;
                }

                return 0;
                }

    /**
     * @brief thread monitor 多线程监视器
     *
     */
    static void *commThreadMonitor(void *pParam){
        // Cast the void pointer passed to the thread back to
        // a pointer of CSerialPortWinBase class
        CSerialPortUnixBase *p_base = (CSerialPortUnixBase *)pParam;

        if (p_base)
        {
            for (; p_base->isThreadRunning();)
            {
                int readbytes = 0;

                // read前获取可读的字节数,不区分阻塞和非阻塞
                ioctl(p_base->fd, FIONREAD, &readbytes);
                if (readbytes >= p_base->getMinByteReadNotify()) //设定字符数，默认为2
                {
                    p_base->readReady._emit();
                }
                else
                {
                    usleep(1); // fix high cpu usage on unix
                }
            }
        }
        else
        {
            // point null
        }

        pthread_exit(NULL);
    }

    /**
     * @brief start thread monitor 启动多线程监视器
     *
     * @return
     * @retval true start success 启动成功
     * @retval false start failed 启动失败
     */
    bool startThreadMonitor(){
        bool bRet = true;

        // start read thread
        int ret = pthread_create(&m_monitorThread, NULL, commThreadMonitor, (void *)this);
        if (ret < 0)
        {
            bRet = false;

            printf("Create read thread error.");
        }

        return bRet;
    }
    /**
     * @brief stop thread monitor 停止多线程监视器
     *
     * @return
     * @retval true stop success 停止成功
     * @retval false stop failed 停止失败
     */
    bool stopThreadMonitor(){
        m_isThreadRunning = false;

        pthread_join(m_monitorThread, NULL);

        return true;
    }

public:
    sigslot::signal0<> readReady; ///< sigslot for read 读数据信号

private:
    std::string m_portName;
    int m_baudRate;
    itas109::Parity m_parity;
    itas109::DataBits m_dataBits;
    itas109::StopBits m_stopbits;
    itas109::FlowControl m_flowControl;
    int64_t m_readBufferSize;

    int fd; /* File descriptor for the port */

private:
    pthread_t m_monitorThread; /**< read thread */

    bool m_isThreadRunning;

    pthread_mutex_t m_communicationMutex; ///< mutex
};
#endif //__CSERIALPORTUNIXBASE_H__