Fixing semantics

src/main.rs

@@ -645,8 +645,7 @@ const APP: () = {
                     hrtimer
                 };
 
-                let (mut qspi, config) = ad9959.freeze();
-                qspi.start_stream().unwrap();
+                let (qspi, config) = ad9959.freeze();
                 DdsOutput::new(qspi, io_update_trigger, config)
             };
 

src/pounder/dds_output.rs

@@ -28,10 +28,10 @@ impl DdsOutput {
         io_update_trigger: HighResTimerE,
         dds_config: DdsConfig,
     ) -> Self {
-        qspi.start_stream();
+        qspi.start_stream().unwrap();
         Self {
             config: dds_config,
-            _qspi,
+            _qspi: qspi,
             io_update_trigger,
         }
     }