Microsoft encourages you to use the in-box transport-minidrivers whenever possible. Sample buttons ACPI for Windows 10 Core Editions.If you are implementing a GPIO button, describe the button in the system ACPI so that Windows can load the in-box driver, Hidinterrupt.sys, as the button driver that reports events to the operating system. Use the Microsoft-provided in-box button driver Here are some general pointers to help you decide which implementation you should follow if you are creating HID buttons. Your driver could be a HID source driver or a HID transport driver. For such buttons, you need to write a driver that exposes the button as a HID button and reports state changes to the HID class driver (Microsoft-provided). The in-box driver cannot service a button that is not wired to an interrupt line. A HID transport minidriver reports those events to upper-level drivers that then send details to HID clients in user mode or kernel mode.įor physical general-purpose I/O (GPIO) buttons, the HID transport minidriver is a Microsoft-provided in-box driver that reports the events based on the interrupts that are received on the defined GPIO hardware resources. When a button state changes, that event is mapped to a HID Usages. This allows the system to interpret the purpose and events of those buttons in a standardized way. Buttons declare themselves to the operating system as HID devices by supplying HID button report descriptors. Use the Microsoft-provided button driver for GPIO buttons otherwise, implement your driver that injects HID data to the operating system.īuttons (Power, Windows, volume and rotation lock) are typically used for tasks that occur while the physical keyboard is not available to the user, on form factors such as convertibles or slates.

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