In computing, a device driver or software driver is a computer program Computer programs are instructions for a computer. A computer requires programs to function, typically executing the program's instructions in a central processor. The program has an executable form that the computer can use directly to execute the instructions. The same program in its human-readable source code form, from which executable allowing higher-level computer programs to interact with a hardware Hardware is a general term for the physical artifacts of a technology. It may also mean the physical components of a computer system, in the form of computer hardware device.
A driver typically communicates with the device through the computer bus In computer architecture, a bus is a subsystem that transfers data between computer components inside a computer or between computers or communications subsystem to which the hardware connects. When a calling program invokes a routine In computer science, a subroutine or subprogram is a portion of code within a larger program, which performs a specific task and is relatively independent of the remaining code in the driver, the driver issues commands to the device. Once the device sends data back to the driver, the driver may invoke routines in the original calling program. Drivers are hardware-dependent and operating-system An operating system is an interface between hardware and user which is responsible for the management and coordination of activities and the sharing of the resources of a computer, that acts as a host for computing applications run on the machine. As a host, one of the purposes of an operating system is to handle the resource allocation and access-specific. They usually provide the interrupt In computing, an interrupt is an asynchronous signal indicating the need for attention or a synchronous event in software indicating the need for a change in execution handling required for any necessary asynchronous time-dependent hardware interface.
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