+ // Check that a device instance has been selected.
+ if (!_sdi) {
+ qDebug() << "No device selected";
+ return;
+ }
+
+ // Check that at least one probe is enabled
+ const GSList *l;
+ for (l = _sdi->probes; l; l = l->next) {
+ sr_probe *const probe = (sr_probe*)l->data;
+ assert(probe);
+ if (probe->enabled)
+ break;
+ }