static void rx_phase_rotation_update()
{
struct iio_channel *out[4];
gdouble val[4];
int i, d = 0;
out[0] = iio_device_find_channel(cap, "voltage0", false);
out[1] = iio_device_find_channel(cap, "voltage1", false);
if (is_2rx_2tx) {
out[2] = iio_device_find_channel(cap, "voltage2", false);
out[3] = iio_device_find_channel(cap, "voltage3", false);
d = 2;
}
for (i = 0; i <= d; i += 2) {
iio_channel_attr_read_double(out[i], "calibscale", &val[0]);
iio_channel_attr_read_double(out[i], "calibphase", &val[1]);
iio_channel_attr_read_double(out[i + 1], "calibscale", &val[2]);
iio_channel_attr_read_double(out[i + 1], "calibphase", &val[3]);
val[0] = acos(val[0]) * 360.0 / (2.0 * M_PI);
val[1] = asin(-1.0 * val[1]) * 360.0 / (2.0 * M_PI);
val[2] = acos(val[2]) * 360.0 / (2.0 * M_PI);
val[3] = asin(val[3]) * 360.0 / (2.0 * M_PI);
if (val[1] < 0.0)
val[0] *= -1.0;
if (val[3] < 0.0)
val[2] *= -1.0;
if (val[1] < -90.0)
val[0] = (val[0] * -1.0) - 180.0;
if (val[3] < -90.0)
val[0] = (val[0] * -1.0) - 180.0;
if (fabs(val[0]) > 90.0) {
if (val[1] < 0.0)
val[1] = (val[1] * -1.0) - 180.0;
else
val[1] = 180 - val[1];
}
if (fabs(val[2]) > 90.0) {
if (val[3] < 0.0)
val[3] = (val[3] * -1.0) - 180.0;
else
val[3] = 180 - val[3];
}
if (round(val[0]) != round(val[1]) &&
round(val[0]) != round(val[2]) &&
round(val[0]) != round(val[3])) {
printf("error calculating phase rotations\n");
val[0] = 0.0;
} else
val[0] = (val[0] + val[1] + val[2] + val[3]) / 4.0;
gtk_spin_button_set_value(GTK_SPIN_BUTTON(rx_phase_rotation[i/2]), val[0]);
}
}
static double read_double_attr(const struct iio_channel *chn, const char *name)
{
double val;
int ret = iio_channel_attr_read_double(chn, name, &val);
return ret < 0 ? -1.0 : val;
}
