Function serial_setup

src/serial.c:373–812

* \brief Set up Serial port according to requests in port * \param rp * \return RIG_OK or < 0 */

 * \return RIG_OK or < 0
 */
int HAMLIB_API serial_setup(hamlib_port_t *rp)
{
    int fd;
    /* There's a lib replacement for termios under Mingw */
#if defined(HAVE_TERMIOS_H)
    speed_t speed;            /* serial comm speed */
    struct termios options, orig_options;
#elif defined(HAVE_TERMIO_H)
    struct termio options, orig_options;
#elif defined(HAVE_SGTTY_H)
    struct sgttyb sg, orig_sg;
#else
#  error "No term control supported!"
#endif
    term_options_backup_t *term_backup = NULL;

    if (!rp)
    {
        return (-RIG_EINVAL);
    }

    fd = rp->fd;

    // Linux sets pins high so we force them low once
    // This fails on Linux and MacOS with hardware flow control
    // Seems setting low disables hardware flow setting later
//    ser_set_rts(rp, 0);
//    ser_set_dtr(rp, 0);

    /*
     * Get the current options for the port...
     */
#if defined(HAVE_TERMIOS_H)
    rig_debug(RIG_DEBUG_TRACE, "%s: tcgetattr\n", __func__);
    tcgetattr(fd, &options);
    memcpy(&orig_options, &options, sizeof(orig_options));
#elif defined(HAVE_TERMIO_H)
    rig_debug(RIG_DEBUG_TRACE, "%s: IOCTL TCGETA\n", __func__);
    IOCTL(fd, TCGETA, &options);
    memcpy(&orig_options, &options, sizeof(orig_options));
#else   /* sgtty */
    rig_debug(RIG_DEBUG_TRACE, "%s: IOCTL TIOCGETP\n", __func__);
    IOCTL(fd, TIOCGETP, &sg);
    memcpy(&orig_sg, &sg, sizeof(orig_sg));
#endif

#ifdef HAVE_CFMAKERAW
    /* Set serial port to RAW mode by default. */
    rig_debug(RIG_DEBUG_TRACE, "%s: cfmakeraw\n", __func__);
    cfmakeraw(&options);
#endif

    /*
     * Set the baud rates to requested values
     */
    switch (rp->parm.serial.rate)
    {
    case 150: