USB Host controller drivers such as STM32 USBH USB Host controllers in the USB Host-Side framework.Gadget requires a peripheral controller and the gadget driver to use it.Host-Side provides API interface to class drivers and forwards the request from class drivers to host controller driver.USB framework ( Kernel space): composed of two parts, USB Host-Side and USB Gadget, which rely on the USB core with specific APIs to support USB host and devices controllers.

debugfs provides a debugging interface available through the user terminal. sysfs provides an information interface available through the user terminal. Gadget configfs provides configuration interface available through user terminal, used to configure USB Gadget. libusbg is a userland library that provides routines for creating and parsing USB gadget devices using the configfs API. One of the well-known utility is lsusb, used to display information about USB buses and the devices connected to them. usbutils is a set of USB utilities for collecting information about the USB devices that are connected to the USB host. libusb is a userland library that provides access to USB devices. USB Implementation architecture 2.1 Component description Linux can also be used as a device on the peripheral side, using gadget drivers. In this case various types of peripherals can be plugged in, such as: gadget drivers and classes to be used within a peripheral.host controllers and peripheral devices.The USB (universal serial bus) Linux ® framework supports many types of: 5.3.3 DWC2 driver debug messages and debugfs entry.5.3.1 Activating USB framework debug messages.5.2.2 How to trace using a protocol analyzer.5.1.2.2 USB Gadget monitoring with sysfs.5.1.2.1 USB buses monitoring with sysfs.4.3 How to configure USB Gadget through configfs.4.2 How to mount a USB key (mass-storage).

Usbutil version 2.00