usb feature gate

embassy-hal-common/src/usb/mod.rs

@@ -11,7 +11,7 @@ pub mod usb_serial;
 
 use crate::peripheral::{PeripheralMutex, PeripheralState, StateStorage};
 use embassy::interrupt::Interrupt;
-use usb_serial::{ReadInterface, UsbSerial, WriteInterface};
+pub use usb_serial::{ReadInterface, UsbSerial, WriteInterface};
 
 /// Marker trait to mark an interrupt to be used with the [`Usb`] abstraction.
 pub unsafe trait USBInterrupt: Interrupt + Send {}

embassy-nrf/src/lib.rs

@@ -73,21 +73,25 @@ pub(crate) use chip::pac;
 
 pub use chip::{peripherals, Peripherals};
 
-use nrf_usbd::{UsbPeripheral, Usbd};
-use usb_device::bus::UsbBusAllocator;
+#[cfg(any(feature = "nrf52820", feature = "nrf52833", feature = "nrf52840"))]
+pub mod usb {
 
-pub struct UsbBus;
-unsafe impl UsbPeripheral for UsbBus {
-    const REGISTERS: *const () = pac::USBD::ptr() as *const ();
-}
+    use nrf_usbd::{UsbPeripheral, Usbd};
+    use usb_device::bus::UsbBusAllocator;
 
-impl UsbBus {
-    pub fn new() -> UsbBusAllocator<Usbd<UsbBus>> {
-        Usbd::new(UsbBus)
+    pub struct UsbBus;
+    unsafe impl UsbPeripheral for UsbBus {
+        const REGISTERS: *const () = crate::pac::USBD::ptr() as *const ();
     }
-}
 
-unsafe impl embassy_hal_common::usb::USBInterrupt for interrupt::USBD {}
+    impl UsbBus {
+        pub fn new() -> UsbBusAllocator<Usbd<UsbBus>> {
+            Usbd::new(UsbBus)
+        }
+    }
+
+    unsafe impl embassy_hal_common::usb::USBInterrupt for crate::interrupt::USBD {}
+}
 
 pub mod interrupt {
     pub use crate::chip::irqs::*;

examples/nrf/src/bin/usb_uart.rs

@@ -17,7 +17,7 @@ use embassy::executor::Spawner;
 use embassy::io::{AsyncBufReadExt, AsyncWriteExt};
 use embassy::time::{Duration, Timer};
 use embassy_hal_common::usb::{State, Usb, UsbSerial};
-use embassy_nrf::UsbBus;
+use embassy_nrf::usb::UsbBus;
 use embassy_nrf::{interrupt, Peripherals};
 use usb_device::device::{UsbDeviceBuilder, UsbVidPid};