Struct DeviceDescriptor

pub struct DeviceDescriptor {
    pub usb_release: u16,
    pub class: u8,
    pub subclass: u8,
    pub protocol: u8,
    pub max_packet_size_ep0: u8,
    pub vendor_id: u16,
    pub product_id: u16,
    pub device_release: u16,
    pub manufacturer_string: u8,
    pub product_string: u8,
    pub serial_number_string: u8,
    pub num_configurations: u8,
}

Fields

usb_release: u16

Valid values include 0x0100 (USB1.0), 0x0110 (USB1.1) and 0x0200 (USB2.0)

class: u8

0x00 means each interface defines its own class. 0xFF means the class behavior is defined by the vendor. All other values have meaning assigned by USB-IF

subclass: u8

Assigned by USB-IF if class is

protocol: u8

Assigned by USB-IF if class is

max_packet_size_ep0: u8

Max packet size for endpoint 0. Must be 8, 16, 32 or 64

vendor_id: u16

Obtained from USB-IF

product_id: u16

Together with vendor_id, this must be unique to the product

device_release: u16

Device release number in binary coded decimal (BCD)

manufacturer_string: u8

Index of the string descriptor describing manufacturer, or 0 if none

product_string: u8

Index of the string descriptor describing product, or 0 if none

serial_number_string: u8

Index of the string descriptor giving device serial number, or 0 if none

num_configurations: u8

Number of configurations the device supports. Must be at least one

Trait Implementations

impl Default for DeviceDescriptor

fn default() -> Self

Returns the “default value” for a type.

impl Descriptor for DeviceDescriptor

fn size(&self) -> usize

Serialized size of Descriptor

fn write_to_unchecked(&self, buf: &[Cell<u8>]) -> usize

Same as write_to(), but doesn’t check that buf is long enough before indexing into it. This should be used only if the result of size() is first consulted.

fn write_to(&self, buf: &[Cell<u8>]) -> usize

Serialize the descriptor to a buffer for transmission on the bus