usbw 0.0.2

basic USB driver. So far just a wrapper for `rusb`. Planning on wrapping `libusb` later
Documentation 
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use crate::version::Version;

#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Debug, Hash)]
pub struct VendorID(pub u16);

#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Debug, Hash)]
pub struct ProductID(pub u16);
#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Debug, Hash)]
pub struct DeviceIdentifier {
    pub vendor_id: VendorID,
    pub product_id: ProductID,
}
impl core::fmt::Display for DeviceIdentifier {
    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
        write!(
            f,
            "vid: {:04X} pid: {:04X}",
            self.vendor_id.0, self.product_id.0
        )
    }
}
pub struct StringIndices {
    pub manufacturer: Option<u8>,
    pub product: Option<u8>,
    pub serial_number: Option<u8>,
}
pub struct Codes {
    pub class: u8,
    pub sub_class: u8,
    pub protocol: u8,
}
pub struct Descriptor {
    pub usb_version: Version,
    pub codes: Codes,
    pub max_packet_size: u8,
    pub device_identifier: DeviceIdentifier,
    pub device_version: Version,
    pub string_indices: StringIndices,
    pub num_configurations: u8,
}