Struct usb_device::descriptor::DescriptorWriter

pub struct DescriptorWriter<'a> { /* fields omitted */ }

A writer for USB descriptors.

Methods

impl<'_> DescriptorWriter<'_>

pub fn position(&self) -> usize

Gets the current position in the buffer, i.e. the number of bytes written so far.

pub fn write(&mut self, descriptor_type: u8, descriptor: &[u8]) -> Result<()>

Writes an arbitrary (usually class-specific) descriptor.

pub fn interface(
    &mut self,
    number: InterfaceNumber,
    interface_class: u8,
    interface_sub_class: u8,
    interface_protocol: u8
) -> Result<()>

Writes a interface descriptor.

Arguments

• number - Interface number previously allocated with UsbBusAllocator::interface.
• interface_class - Class code assigned by USB.org. Use 0xff for vendor-specific devices that do not conform to any class.
• interface_sub_class - Sub-class code. Depends on class.
• interface_protocol - Protocol code. Depends on class and sub-class.

pub fn endpoint<'e, B: UsbBus, D: EndpointDirection>(
    &mut self,
    endpoint: &Endpoint<'e, B, D>
) -> Result<()>

Writes an endpoint descriptor.

Arguments

• endpoint - Endpoint previously allocated with UsbBusAllocator.