The Function Driver Framework (FDF) enables developers to write Function Drivers (FDs). It loads and enables the Function Drivers for newly connected USB devices.
The Function Driver Framework enables developers to write Function Drivers. It also provides a server which watches for device attachment and detachment events from the USB Driver Interface (USBDI). It loads and unloads Function Drivers as necessary to allow application-level software on the Symbian Host to use attached devices.
This document provides background information for Symbian licensees and third-party developers who are designing Function Drivers.
The component has the following key concepts:
A singleton user-mode server that watches for device attachment and detachment events from the USBDI and loads Function Drivers for devices.
The services offered by a USB device.
A driver for USB peripherals that are attached to a Symbian platform device, usually made up of a Function Driver Controller (FDC) and a Function Driver Implementation (FDI).
Part of a Function Driver. The FDC is a plug-in to the Function Driver Framework (FDF).
Part of a Function Driver.
The software including the USBDI which provides USB Host functionality.