Add basic device state handling for endpoints.

embassy-usb/src/driver.rs

@@ -72,6 +72,9 @@ pub trait Bus {
     /// Sets the device USB address to `addr`.
     fn set_device_address(&mut self, addr: u8);
 
+    /// Sets the device configured state.
+    fn set_configured(&mut self, configured: bool);
+
     /// Sets or clears the STALL condition for an endpoint. If the endpoint is an OUT endpoint, it
     /// should be prepared to receive data again. Only used during control transfers.
     fn set_stalled(&mut self, ep_addr: EndpointAddress, stalled: bool);
@@ -105,6 +108,10 @@ pub trait Bus {
 }
 
 pub trait Endpoint {
+    type WaitEnabledFuture<'a>: Future<Output = ()> + 'a
+    where
+        Self: 'a;
+
     /// Get the endpoint address
     fn info(&self) -> &EndpointInfo;
 
@@ -115,6 +122,9 @@ pub trait Endpoint {
     /// Gets whether the STALL condition is set for an endpoint.
     fn is_stalled(&self) -> bool;
 
+    /// Waits for the endpoint to be enabled.
+    fn wait_enabled(&mut self) -> Self::WaitEnabledFuture<'_>;
+
     // TODO enable/disable?
 }
 
@@ -212,6 +222,7 @@ pub enum WriteError {
     ///   class shouldn't provide more data than the `max_packet_size` it specified when allocating
     ///   the endpoint.
     BufferOverflow,
+    Disabled,
 }
 
 #[derive(Copy, Clone, Eq, PartialEq, Debug)]
@@ -223,4 +234,5 @@ pub enum ReadError {
     /// should use a buffer that is large enough for the `max_packet_size` it specified when
     /// allocating the endpoint.
     BufferOverflow,
+    Disabled,
 }

embassy-usb/src/lib.rs

@@ -162,18 +162,21 @@ impl<'d, D: Driver<'d>> UsbDevice<'d, D> {
                     self.remote_wakeup_enabled = true;
                     self.control.accept(stage)
                 }
-                (Request::SET_ADDRESS, 1..=127) => {
-                    self.pending_address = req.value as u8;
+                (Request::SET_ADDRESS, addr @ 1..=127) => {
+                    self.pending_address = addr as u8;
+                    self.bus.set_device_address(self.pending_address);
                     self.control.accept(stage)
                 }
                 (Request::SET_CONFIGURATION, CONFIGURATION_VALUE_U16) => {
                     self.device_state = UsbDeviceState::Configured;
+                    self.bus.set_configured(true);
                     self.control.accept(stage)
                 }
                 (Request::SET_CONFIGURATION, CONFIGURATION_NONE_U16) => match self.device_state {
                     UsbDeviceState::Default => self.control.accept(stage),
                     _ => {
                         self.device_state = UsbDeviceState::Addressed;
+                        self.bus.set_configured(false);
                         self.control.accept(stage)
                     }
                 },