警告:'serialAttr' is used uninitialized in this function

int main_form::markSerialPort()
{
    int fd=m_fd;
    termios serialAttr;
    serialAttr.c_cflag |= PARENB|CMSPAR;
    serialAttr.c_cflag &= ~PARODD;
    if(tcsetattr(fd, TCSANOW, &serialAttr) !=0)   //配置立刻起作用
    {
        perror("serial error");
        return -1;
    }
    return 0;
}

我的置位校验就出这个问题，友善之臂的openSerialPort()中的却没有问题……

int main_form::openSerialPort()
{
    int fd = -1;

    const char *devName = "/dev/ttyUSB0";
    fd = ::open(devName, O_RDWR|O_NONBLOCK);
    if (fd < 0) {
        return -1;
    }

    termios serialAttr;
    memset(&serialAttr, 0, sizeof serialAttr);
    serialAttr.c_iflag = IGNPAR;
    serialAttr.c_cflag = B9600 | HUPCL | CS8 | CREAD | CLOCAL;
    serialAttr.c_cc[VMIN] = 0;
    if (tcsetattr(fd, TCSANOW, &serialAttr) != 0) {
        return -1;
    }
    return fd;
}

他俩的地位差别就在声明里边

private:
    int openSerialPort();
private slots:
    int markSerialPort();

一个是private,一个是private slots;

解决记录：

1

private:
    int openSerialPort();
    int m_timeId;
    int markSerialPort();
    int spaceSerialPort();

失败！！