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use super::*;
/// Represent a USB interface
#[derive(Clone, Debug)]
#[cfg_attr(feature = "serde", derive(Serialize))]
pub struct UsbInterface {
pub interface_class: u8,
pub interface_subclass: u8,
pub interface_protocol: u8,
pub endpoints: Vec<UsbEndpoint>,
pub string_interface: u8,
pub class_specific_descriptor: Vec<u8>,
#[cfg_attr(feature = "serde", serde(skip))]
pub handler: Arc<Mutex<Box<dyn UsbInterfaceHandler + Send>>>,
}
/// A handler of a custom usb interface
pub trait UsbInterfaceHandler: std::fmt::Debug {
/// Return the class specific descriptor which is inserted between interface descriptor and endpoint descriptor
fn get_class_specific_descriptor(&self) -> Vec<u8>;
/// Handle a URB(USB Request Block) targeting at this interface
///
/// Can be one of: control transfer to ep0 or other types of transfer to its endpoint.
/// The resulting data should not exceed `transfer_buffer_length`.
fn handle_urb(
&mut self,
interface: &UsbInterface,
ep: UsbEndpoint,
transfer_buffer_length: u32,
setup: SetupPacket,
req: &[u8],
) -> Result<Vec<u8>>;
/// Helper to downcast to actual struct
///
/// Please implement it as:
/// ```ignore
/// fn as_any(&mut self) -> &mut dyn Any {
/// self
/// }
/// ```
fn as_any(&mut self) -> &mut dyn Any;
}