Determination of physical connectivity status of devices based on electrical measurement

摘要

Embodiments of the invention are generally directed to determination of physical connectivity status of devices based on electrical measurement. An embodiment of a method includes discovering a connection of a first device with a second device, and performing an electrical measurement of the second device by the first device via the connection between the first device and the second device, where performing the electrical measurement includes sensing by the first device of an element of the second device. The method further includes, if the sensing by the first device fails to detect the element of the second device and a predetermined condition for the electrical measurement is enabled, then determining by the first device that the connection with the second device has been lost.

主权项

1. A method for controlling a connectivity status of a source device with a sink device, the method comprising:
discovering by the source device, a change in impedance on a control bus interface; responsive to detecting the change in impedance, initiating by the source device, a source discovery process via the control bus interface; activating a connected state of the source device responsive to the source discovery process detecting a control bus termination element of the sink device being coupled with the control bus indicating that the sink device has completed its discovery process; while in the connected state, sensing by the source device whether or not a sink TMDS termination element of the sink device is coupled to a data bus interface; if the sensing by the source device fails to detect the sink TMDS (Transmission Minimized Differential Signaling) termination element of the sink device, determining by the source device that the connection with the sink device has been lost; and responsive to the determining by the source device that the connection with the sink device has been lost, decoupling a control bus termination element of the source device from the control bus interface.