README.md

@@ -21,6 +21,18 @@ You may also want to add a comment:
 set comment Hello World!
 ```
 
+And possibly enable GPS:
+
+```
+set gps receiver
+```
+
+It may also be a good idea to look at all the settings to make sure they're how you want them:
+
+```
+get
+```
+
 Don't forget to enable transmitting and save your settings:
 
 ```

src/main.rs

@@ -191,12 +191,19 @@ mod app {
             hclk: clocks.hclk(),
         };
         unsafe {
+            #[allow(static_mut_refs)]
             USB_BUS.replace(UsbBus::new(usb, &mut EP_MEMORY));
         }
 
-        let usb_serial = usbd_serial::SerialPort::new(unsafe { USB_BUS.as_ref().unwrap() });
+        let usb_serial = usbd_serial::SerialPort::new(unsafe {
+            #[allow(static_mut_refs)]
+            USB_BUS.as_ref().unwrap()
+        });
         let usb_dev = UsbDeviceBuilder::new(
-            unsafe { USB_BUS.as_ref().unwrap() },
+            unsafe {
+                #[allow(static_mut_refs)]
+                USB_BUS.as_ref().unwrap()
+            },
             UsbVidPid(0x16c0, 0x27dd),
         )
         .manufacturer("cats.radio")