Abstract: Apparatuses and methods relating to an enhanced serial peripheral interface (eSPI) port expander circuitry are described. In an embodiment, an apparatus includes an upstream eSPI port, a plurality of downstream eSPI ports, and an eSPI aggregator. The upstream eSPI port is to operate as an eSPI slave on an upstream eSPI bus. Each of the plurality of downstream eSPI ports is to operate as an eSPI master on a corresponding one of a plurality of downstream eSPI buses. The eSPI aggregator is to forward or broadcast transactions from the upstream eSPI bus to one or more of the plurality of downstream eSPI buses and to aggregate responses from one or more of the downstream eSPI buses.

Abstract: Apparatuses and methods relating to an enhanced serial peripheral interface (eSPI) port expander circuitry are described. In an embodiment, an apparatus includes an upstream eSPI port, a plurality of downstream eSPI ports, and an eSPI aggregator. The upstream eSPI port is to operate as an eSPI slave on an upstream eSPI bus. Each of the plurality of downstream eSPI ports is to operate as an eSPI master on a corresponding one of a plurality of downstream eSPI buses. The eSPI aggregator is to forward or broadcast transactions from the upstream eSPI bus to one or more of the plurality of downstream eSPI buses and to aggregate responses from one or more of the downstream eSPI buses.

Abstract: An ultrasonic path guidance system and method for the visually impaired uses an array of ultrasound transmitters that are directional and aimed at distinct locations forward of the user. The transmitters are positioned on the torso of the individual user and one or more receivers detect echoes from obstacles upon which the transmitted ultrasound sound impinges. Audible tone is generated each time an echo is received. The tone's frequency is dependent on which transmitter transmitted the original ultrasound pulse that resulted in the detected echo. This gives an easy to understand indication of the location of detected obstacles. The elapsed time from emission of an ultrasound pulse to reception of its echo is used to arrive at the distance to the obstacle.