Device controller, on the other hand, is like a bridge between the device and the operating system. Without device drivers, the computer won’t be able to able to communicate properly with the hardware devices. The code is implemented by the device manufacturer which allows the device to communicate with the computer’s OS. – A device driver is a code inside the OS that allows to be empowered with the specific commands needed to operate the associated device. So, the device controller interacts with the OS via the device driver.ĭifference between Device Driver and Device Controller Basics The controller receives the data from a connected device, stores it temporarily, and then communicates the data to its device driver. Thus, there is always a device controller and a device driver associated with each device that communicates with the OS. So, there is different software running as part of the OS that interacts with each controller. Each device controller has its own set of commands, depending on the nature or the manufacturer. It acts as a bridge between the device and the operating system which receives commands from the OS, such as read, write or more complex commands. It is an electronic component consisting of chips that is responsible for handling the incoming and outgoing signals of the CPU. Device controller is a hardware unit attached to the I/O bus of the computer and works like an interface between a device and a device driver.
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