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:
 
 ```
@@ -71,7 +83,7 @@ brew install dfu-util
 3. Put the transceiver into firmware flashing mode:
     1. Connect the board to your computer via USB
     2. Hold down the `flash` button
-    3. Press the `reset` button
+    3. Momentarily press the `reset` button
     4. Release the `flash` button
     5. The red LED will come on, then go off. If it stays on, it means your computer isn’t communicating with the board for some reason. Check your cable!
 4. Flash the firmware:
@@ -108,7 +120,7 @@ sudo udevadm control --reload-rules && sudo udevadm trigger
 ### Board setup
 1. Connect the board to your computer via USB
 2. Hold down the `flash` button
-3. Press the `reset` button
+3. Momentarily press the `reset` button
 4. Release the `flash` button
 
 The red LED will come on, then go off. If it stays on, it means your computer isn't communicating with the board for some reason. Check your cable!

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")