Function twiddling

src/rig.c:2036–2084

detect if somebody is twiddling the VFO indicator is last set freq doesn't match current freq so we have to query freq every time we set freq or vfo to handle this

// indicator is last set freq doesn't match current freq
// so we have to query freq every time we set freq or vfo to handle this
static int twiddling(RIG *rig)
{
    const struct rig_caps *caps;
    struct rig_state *rs = STATE(rig);

    if (rs->twiddle_timeout == 0) { return 0; } // don't detect twiddling

    ENTERFUNC2;
    caps = rig->caps;

    if (caps->get_freq)    // gotta have get_freq of course
    {
        freq_t curr_freq = 0;
        int retval2;
        int elapsed;

        HAMLIB_TRACE;
        retval2 = caps->get_freq(rig, RIG_VFO_CURR, &curr_freq);

        if (retval2 == RIG_OK && rs->current_freq != curr_freq)
        {
            rig_debug(RIG_DEBUG_TRACE,
                      "%s: Somebody twiddling the VFO? last_freq=%.0f, curr_freq=%.0f\n", __func__,
                      rs->current_freq, curr_freq);

            if (rs->current_freq == 0)
            {
                rs->current_freq = curr_freq;
                RETURNFUNC2(0); // not twiddling as first time freq is being set
            }

            rs->twiddle_time = time(NULL); // update last twiddle time
            rs->current_freq = curr_freq; // we have a new freq to remember
            rig_set_cache_freq(rig, RIG_VFO_CURR, curr_freq);
        }

        elapsed = time(NULL) - rs->twiddle_time;

        if (elapsed < rs->twiddle_timeout)
        {
            rig_debug(RIG_DEBUG_TRACE, "%s: Twiddle elapsed < %d, elapsed=%d\n", __func__,
                      rs->twiddle_timeout, elapsed);
            rs->twiddle_state = TWIDDLE_ON; // gets turned off in rig_set_freq;
            RETURNFUNC2(1); // would be better as error but other software won't handle it
        }
    }

    RETURNFUNC2(0);
}

#include "band_changed.c"