Module loopback 

Loopback function (for testing).

The Linux kernel configuration option CONFIG_USB_CONFIGFS_F_LB_SS must be enabled. The loopback function loops back a configurable number of transfers, useful for testing USB device controllers and host-side software.

Example

use usb_gadget::{
    default_udc, function::loopback::Loopback, Class, Config, Gadget, Id, Strings,
};

let (loopback, func) = Loopback::new();

let udc = default_udc().expect("cannot get UDC");
let reg = Gadget::new(
    Class::vendor_specific(0, 0),
    Id::LINUX_FOUNDATION_COMPOSITE,
    Strings::new("Manufacturer", "Loopback", "0123456"),
)
.with_config(Config::new("Loopback Config 1").with_function(func))
.bind(&udc)
.expect("cannot bind to UDC");

println!(
    "Loopback {} at {} status {:?}",
    reg.name().to_string_lossy(),
    reg.path().display(),
    loopback.status()
);

Structs

Loopback

USB loopback function.

LoopbackBuilder

Builder for USB loopback function.