feat(UsbBus): implement resume and set_device_address methods

src/types/usb_device.rs

@@ -275,11 +275,45 @@ impl<const L: usize> UsbBus for UsbDevice<L> {
     }
 
     fn resume(&self) {
-        todo!();
+        free(|cs| {
+            let usb = self.usb.borrow(cs);
+            let pll = self.pll.borrow(cs);
+
+            // Enable PLL and wait PLL lock. //
+
+            pll.pllcsr.modify(|_, w| w.plle().set_bit());
+
+            while pll.pllcsr.read().plock().bit_is_clear() {}
+
+            // Unfreeze USB clock. //
+            
+            usb.usbcon.modify(|_, w| w.frzclk().clear_bit());
+
+            // Clear resume informations. //      
+
+            usb.udint
+                .modify(|_, w| w.wakeupi().clear_bit().suspi().clear_bit());
+
+            usb.udien
+                .modify(|_, w| w.wakeupe().clear_bit().suspe().set_bit());
+        })
     }
 
     fn set_device_address(&self, addr: u8) {
-        todo!();
+        free(|cs| {
+            let usb = self.usb.borrow(cs);
+
+            // Set address. //
+            
+            usb.udaddr.modify(|_, w| w.uadd().bits(addr));
+
+            // Note: ADDEN and UADD shall not be written at the same time.
+            // (written in atmega32u4/16u4 docs)
+
+            // Enable. //
+            
+            usb.udaddr.modify(|_, w| w.adden().set_bit());
+        });
     }
 
     fn set_stalled(&self, ep_addr: usb_device::endpoint::EndpointAddress, stalled: bool) {