Abstract: An accessory device architecture is described. In one or more implementations, data is received from an accessory device at an intermediate processor of a computing device, the data usable to enumerate functionality of the accessory device for operation as part of a computing device that includes the intermediate processor. The data is passed by the intermediate processor to an operating system executed on processor of the computing device to enumerate the functionality of the accessory device as part of the intermediate processor.

Abstract: Sensor fusion algorithm techniques are described. In one or more embodiments, behaviors of a host device and accessory devices are controlled based upon an orientation of the host device and accessory devices, relative to one another. A combined spatial position and/or orientation for the host device may be obtained based on raw measurements that are obtained from at least two different types of sensors. In addition, a spatial position and/or orientation for an accessory device is ascertained using one or more sensors of the accessory device. An orientation (or position) of the accessory device relative to the host computing device may then be computed based on the combined spatial position/orientation for the host computing device and the ascertained spatial position/orientation for the accessory device. The relative orientation that is computed may then be used in various ways to control behaviors of the host computing device and/or accessory device.

Abstract: Sensor fusion algorithm techniques are described. In one or more embodiments, behaviors of a host device and accessory devices are controlled based upon an orientation of the host device and accessory devices, relative to one another. A combined spatial position and/or orientation for the host device may be obtained based on raw measurements that are obtained from at least two different types of sensors. In addition, a spatial position and/or orientation for an accessory device is ascertained using one or more sensors of the accessory device. An orientation (or position) of the accessory device relative to the host computing device may then be computed based on the combined spatial position/orientation for the host computing device and the ascertained spatial position/orientation for the accessory device. The relative orientation that is computed may then be used in various ways to control behaviors of the host computing device and/or accessory device.

Abstract: Techniques for mobile device power state are described. In one or more implementations, a mobile device includes a computing device that is flexibly coupled to an input device via a flexible hinge. Accordingly, the mobile device can operate in a variety of different power states based on a positional orientation of the computing device to an associated input device. In one or more implementations, an application that resides on a computing device can operate in different application states based on a positional orientation of the computing device to an associated input device. In one or more implementations, techniques discussed herein can differentiate between vibrations caused by touch input to a touch functionality, and other types of vibrations. Based on this differentiation, techniques can determine whether to transition between device power states.

Abstract: A pressure sensitive keyboard includes multiple pressure sensors associated with the keys of the keyboard. In response to pressure applied to one or more keys of the keyboard, a determination is made as to whether the pressure applied is a key strike (a user selection of a key). Various different factors can be used in determining whether the pressure applied is a key strike, such as the amount of the pressure applied, a rate at which the pressure is applied, a number of keys to which pressure is applied, when the pressure is applied relative to previous key strikes, and so forth.

Abstract: Sensor fusion algorithm techniques are described. In one or more embodiments, behaviors of a host device and accessory devices are controlled based upon an orientation of the host device and accessory devices, relative to one another. A combined spatial position and/or orientation for the host device may be obtained based on raw measurements that are obtained from at least two different types of sensors. In addition, a spatial position and/or orientation for an accessory device is ascertained using one or more sensors of the accessory device. An orientation (or position) of the accessory device relative to the host computing device may then be computed based on the combined spatial position/orientation for the host computing device and the ascertained spatial position/orientation for the accessory device. The relative orientation that is computed may then be used in various ways to control behaviors of the host computing device and/or accessory device.

Abstract: Techniques for mobile device power state are described. In one or more implementations, a mobile device includes a computing device that is flexibly coupled to an input device via a flexible hinge. Accordingly, the mobile device can operate in a variety of different power states based on a positional orientation of the computing device to an associated input device. In one or more implementations, an application that resides on a computing device can operate in different application states based on a positional orientation of the computing device to an associated input device. In one or more implementations, techniques discussed herein can differentiate between vibrations caused by touch input to a touch functionality, and other types of vibrations. Based on this differentiation, techniques can determine whether to transition between device power states.

Abstract: Sensor fusion algorithm techniques are described. In one or more embodiments, behaviors of a host device and accessory devices are controlled based upon an orientation of the host device and accessory devices, relative to one another. A combined spatial position and/or orientation for the host device may be obtained based on raw measurements that are obtained from at least two different types of sensors. In addition, a spatial position and/or orientation for an accessory device is ascertained using one or more sensors of the accessory device. An orientation (or position) of the accessory device relative to the host computing device may then be computed based on the combined spatial position/orientation for the host computing device and the ascertained spatial position/orientation for the accessory device. The relative orientation that is computed may then be used in various ways to control behaviors of the host computing device and/or accessory device.

Abstract: Force concentrator techniques are described. In one or more implementations, a pressure sensitive key includes a sensor substrate having a plurality of conductors, a flexible contact layer spaced apart from the sensor substrate and configured to flex to contact the sensor substrate to initiate an input; and a force concentrator layer disposed proximal to the flexible contact layer on a side opposite the sensor substrate. The force concentrator layer has a pad disposed thereon that is configured to cause pressure applied to the force concentrator layer to be channeled through the pad to cause the flexible contact layer to contact the sensor substrate to initiate the input.

Abstract: In one aspect, the present disclosure describes a process for maintaining file allocation tables (FATs) for a volume of storage medium. The process includes triggering, by a write operation, modification of data in an existing sector of a data file by writing of data to a new sector of the storage medium. The process also includes writing revised used/unused sector information into one FAT and setting a variable indicative of a number of FATs (NOF) to a first value. The process additionally includes copying the one FAT to another FAT and re-setting the variable to a second value.

Abstract: Methods and systems for operating computing devices are described. In one embodiment, a small amount of static RAM (SRAM) is incorporated into an automotive computing device. The SRAM is battery-backed to provide a non-volatile memory space in which critical data, e.g. the object store, can be maintained in the event of a power loss.

Abstract: Methods and systems for operating automotive computing devices are described. In one embodiment, a small amount of static RAM (SRAM) is incorporated into an automotive computing device. The SRAM is battery-backed to provide a non-volatile memory space in which critical data, e.g. the object store, can be maintained in the event of a power loss. Circuitry is provided to ensure that the SRAM receives back up power from the battery at appropriate times. Software manages the SRAM and the other storage assembly components and makes use of virtual paging or virtual addressing techniques to keep track of where various pages, including object store pages, are stored in the system. The software knows where all of the object store pages are located so that in the event of a power loss, the page locations are known and hence the pages can be used when power is restored.

Abstract: Methods and systems for operating automotive computing devices are described. In one embodiment, a small amount of static RAM (SRAM) is incorporated into an automotive computing device. The SRAM is battery-backed to provide a non-volatile memory space in which critical data, e.g. the object store, can be maintained in the event of a power loss. Circuitry is provided to ensure that the SRAM receives back up power from the battery at appropriate times. Software manages the SRAM and the other storage assembly components and makes use of virtual paging or virtual addressing techniques to keep track of where various pages, including object store pages, are stored in the system. The software knows where all of the object store pages are located so that in the event of a power loss, the page locations are known and hence the pages can be used when power is restored.

Abstract: In one aspect, the present disclosure describes a process for maintaining file allocation tables (FATs) for a volume of storage medium. The process includes triggering, by a write operation, modification of data in an existing sector of a data file by writing of data to a new sector of the storage medium. The process also includes writing revised used/unused sector information into one FAT and setting a variable indicative of a number of FATs (NOF) to a first value. The process additionally includes copying the one FAT to another FAT and re-setting the variable to a second value.

Abstract: An exemplary system includes a microprocessor executing an operating system, a memory, a bus connecting the microprocessor to the memory, and a memory protection module controlling access to the memory independent of the microprocessor. Access to the memory may be based on a combination of an address, data, and memory control signals received from the microprocessor. A method includes, independent of the microprocessor executing an operating system, controlling access to a system memory based on a combination of signals received from the microprocessor.

Abstract: In one aspect, the present disclosure describes a process for maintaining file allocation tables (FATs) for a volume of storage medium. The process includes triggering, by a write operation, modification of data in an existing sector of a data file by writing of data to a new sector of the storage medium. The process also includes writing revised used/unused sector information into one FAT and setting a variable indicative of a number of FATs (NOF) to a first value. The process additionally includes copying the one FAT to another FAT and re-setting the variable to a second value.

Abstract: Methods and systems for operating automotive computing devices are described. In one embodiment, multiple object store pages are maintained in device SRAM that is configured to be battery backed in an event of a power loss. One or more object store pages are periodically flushed to device non-volatile memory to make room for additional object store pages. The frequency of object store page writes is tracked, and object store pages that are least frequently written to are flushed before object store pages that are more frequently written to. In addition, in the event of a power loss, the SRAM is battery backed.

Abstract: Methods and systems for operating automotive computing devices are described. In one embodiment, a small amount of static RAM (SRAM) is incorporated into an automotive computing device. The SRAM is battery-backed to provide a non-volatile memory space in which critical data can be maintained in the event of a power loss. Circuitry is provided to ensure that the SRAM receives back up power from the battery at the appropriate time. Software manages the SRAM and the other storage assembly components and makes use of virtual paging or virtual addressing techniques to keep track of where various pages, including object store pages, are stored in the system. The software knows exactly where all of the object store pages are stored so that in the event of a power loss, the page locations are known and hence the pages can be used when power is restored.

Abstract: Methods and systems for operating automotive computing devices are described. In one embodiment, an automotive computing device is provided having a processor, volatile memory, non-volatile memory, and SRAM. An object store is provided for the computing device in the non-volatile memory. One or more pages from the object store are maintained in the SRAM.

Abstract: A method for facilitating fast start-up/shut-down of a computing device having a processor, volatile memory, non-volatile memory, and SRAM is described. In one embodiment, an object store for the computing device is provided in the non-volatile memory. A fast lossless shut-down of the computing device may be accomplished by periodically writing data from the object store to a non-volatile medium during operation of the computing device.