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I want to know what is meant by the USB stack and an example of it . I studied a lot about USB and I read some books like USB in a nutshell but "USB stack" wasn't mentioned .
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The drivers in the USB 2.0 driver stack ship in Windows XP with SP1 and later versions of the Windows operating system. The USB 2.0 driver stack is designed to facilitate high-speed USB devices as defined in the USB 2.0 specification. At the bottom of the USB driver stack is the host controller driver.
The figure-1 depicts USB protocol stack as per V2.0. The protocol stack mentions various layers through which data flows between host and device. Folowing section mentions roles or functions of USB protocol layers. Functional Layer: This layer generates requests which are converted into transactions containing different packets.
The USB stack is the component that provides the communication between USB devices and their respective drivers and applications. It consists of multiple files, each with a distinct function. The USB stack in ReactOS is currently limited.
For more information, see WinUSB Device. Each USB device, composite or non-composite, is managed by a client driver. A USB client driver is a class or device driver that is a client of the USB driver stack. Such drivers include class and device-specific drivers from Microsoft or a third-party vendor.
The term "stack" refers to either the abstract data structure (not relevant for this), or to a collection of software that performs a specific function. In the case of a "USB stack", it's the collection of hardware, firmware, kernel modules, drivers, and user programs that allow communication over USB links.
The term "stack" is used because the software components are often layered on top of one another, each using the services of the layer(s) below it.
You may also hear about the "networking stack", or the "LAMP stack", or other similar phrases. Wikipedia has an article on Solution stack, which is the same idea.
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