Function amp_open

src/amplifier.c:312–451

* \brief Open the communication channel to the amplifier. * * \param amp The #AMP handle of the amplifier to be opened. * * Opens the communication channel to an amplifier for which the #AMP handle * has been passed. * * \return RIG_OK if the operation has been successful, otherwise a **negative * value** if an error occurred (in which case, cause is set appropriately). * * \retval RIG_O

 * \sa amp_init(), amp_close()
 */
int HAMLIB_API amp_open(AMP *amp)
{
    const struct amp_caps *caps;
    struct amp_state *rs;
    hamlib_port_t *ap = AMPPORT(amp);
    int status;
    int net1, net2, net3, net4, port;

    amp_debug(RIG_DEBUG_VERBOSE, "%s called\n", __func__);

    if (!amp || !amp->caps)
    {
        return -RIG_EINVAL;
    }

    caps = amp->caps;
    rs = AMPSTATE(amp);

    if (rs->comm_state)
    {
        return -RIG_EINVAL;
    }

    ap->fd = -1;

    // determine if we have a network address
    if (sscanf(ap->pathname, "%d.%d.%d.%d:%d", &net1, &net2, &net3, &net4,
               &port) == 5)
    {
        rig_debug(RIG_DEBUG_TRACE, "%s: using network address %s\n", __func__,
                  ap->pathname);
        ap->type.rig = RIG_PORT_NETWORK;
    }

    switch (ap->type.rig)
    {
    case RIG_PORT_SERIAL:
        status = serial_open(ap);

        if (status != 0)
        {
            return status;
        }

        break;

    case RIG_PORT_PARALLEL:
        status = par_open(ap);

        if (status < 0)
        {
            return status;
        }

        break;

    case RIG_PORT_DEVICE:
        status = open(ap->pathname, O_RDWR, 0);