Microsoft Technology Licensing, LLC

Murali Ravirala

Sharon Drasnin

Robert D Young

Youssef M Barakat

Scott A Fudally

Tejas Mistry

Omid Fatemieh

Gabriel Knezek

Vassili I Nikolaev

Systems and methods for debouncing a signal line within a computer device are provided. The mechanical nature of physical buttons and switches oftentimes present irregular or noisy signals on a signal line when depressed by a user. Thus, noise and/or irregular waveforms may be present on a signal line that is monitored to produce interrupt signals, when deemed valid and genuine. In many embodiments given herein, debounce modules and techniques set a debounce interval timer and/or a noise filtering interval timer in which debounce modules and/or techniques may note whether the signal line is still asserted (e.g., possibly a genuine interrupt signal) during the debounce interval timer and stable (e.g., no further interrupts have fired) during the noise filtering interval timer.

Software debouncing and noise filtering modules for interrupts

Device enumeration support techniques are described for busses that do not natively support enumeration. In one or more embodiments, an intermediate controller of a computing device is configured to interconnect and manage various hardware devices associated with the computing device. The intermediate controller may detect connection and disconnection of hardware devices in association with one or more communication busses employed by the computing device. In response to such detection, the intermediate controller may send appropriate notifications to an operating system to alert the operating system when hardware devices come and go. This enables the operating system to enumerate and denumerate hardware devices within a device configuration and power management system implemented by the operating system that facilitates interaction with the hardware devices through corresponding representations.

Device enumeration support method for computing devices that does not natively support device enumeration

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Sammamish, WA, United States of America

Murali Ravirala