Device driver concept

Device control. Almost every system operation eventually maps to a physical device. With the exception of the processor, memory, and a very few other entities, any and all device control operations are performed by code that is specific to the device being addressed. That code is called a device driver. A device driver, or software driver is a computer program allowing higher-level computer programs to interact with a device. A driver typically communicates with the device through the computer bus or communications subsystem to which the hardware is connected. When a calling program invokes a routine in the driver, the driver issues commands to the device.  · There are three kinds of WDM drivers bus drivers, function drivers, and filter drivers. This topic lists versions of Kernel-Mode Driver Framework (KMDF), the corresponding versions of the Windows operating system, and the changes made in each release. Microsoft Windows provides a variety of driver models that you can use to write drivers.

Device Driver and It’s Purpose. A device driver communicates with the computer hardwares by computer subsystem or computer bus connected to the hardware. Device Drivers are very essential for a computer system to work properly because without device driver the particular hardware fails to work accordingly means it fails in doing a particular. In computing, a device driver is a computer program that operates or controls a particular type of device that is attached to a computer or automaton. A driver provides a software interface to hardware devices, enabling operating systems and other computer programs to access hardware functions without needing to know precise details about the hardware being used. A device driver is a program that controls the operation of a specific type of device (e.g. printer, keyboard, mouse, etc.) that is part of a computer system. Manufacturers build hardware devices in different ways — a device driver provides an interface that allows the operating system and other software to interact with the device, without having to deal with the particular hardware.

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