![]() Emulated host controller headersĪ USB function class driver implements the functionality of a specific interface (or group of interfaces) on the USB device. Emulated host controller programming guideĭeveloping Windows drivers for emulated USB devices (UDE). ![]() The UDE client driver communicates with Udecx by using a set of methods and event callback functions to handle device requests and notify the class extension about various events. The driver pair loads as the FDO in the host controller device stack. This driver is referred to as the UDE client driver. The client driver is written by an IHV/OEM.This is an in-box driver included Windows 10. USB device emulation class extension (UdeCx).The class extension and the client driver represent an emulated host controller with a root hub that is capable of presenting an attached device to the system as an USB device. By using the WDF class extension-client driver model, you can write a driver that translates USB-level constructs (reset, data transfers) to the actual underlying bus by using the hardware’s interface. Windows drivers can present non-USB devices as emulated USB devices. Dual-role controller driver headersĮmulated host controller driver reference Dual-role controller driver programming guideįor information about enabling a Windows system for USB dual-role support, see USB Dual Role Driver Stack Architecture. For more information about the WDF class extension-client driver model, see Ursdevice.h. When writing the driver, use the WDF class extension-client driver model. One of the main responsibilities of a driver for a dual-role controller is to switch between those two roles, tearing down the previous role's device node and loading the device node for the new role. Conversely, the controller can operate in the host role when connected to USB peripherals like storage drives, keyboard, mice. In that scenario, the controller on the device operates in the function role. A mobile device can behave as a peripheral when it is connected to a PC, allowing you to transfer files between your PC and the mobile device. ![]() These controllers are common on mobile devices and allow for connections to PCs, as well as USB peripherals like keyboards and mice.
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