Sysnucleus Multifunction Devices Driver

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A multifunction device occupies one location on its parent bus but contains more than one function. Combination printer/scanner/fax devices and modem/network cards are common multifunction devices.

In a multifunction device, the individual functions are independent. This means the functions must have the following characteristics:

• The functions cannot have start-order dependencies.

• The resource requirements for one function cannot be expressed in terms of the resources of another function (for example, function1 uses I/O port x and function2 uses port x + 200).

• Each function must be able to operate as a separate device, even if it is serviced by the same drivers as another function.

• Each function on the device must be enumerated.

• Resource requirements for each function must be communicated to the PnP manager.

• Download wincomm driver. There must be INF files and drivers for each function.

The component responsible for each of these tasks depends on the multifunction standard for the device's parent bus, the extent to which the device conforms to the standard, and the capabilities of the parent bus driver.

If the device complies with the multifunction standards for its bus, your driver requirements are significantly reduced. Industry-wide multifunction standards have been defined for the PC Card and PCI buses.

If you are working with a multifunction DVD/CD-ROM device used for data storage (not for audio/video playback), you should use the system-supplied WDM DVD class driver, which treats the device as a single logical unit.

For a multifunction device that combines other functionality, you can use a system-supplied driver and INF file if the device complies with the multifunction standards for its bus. The system supplied multifunction driver (mf.sys) can handle the bus-level enumeration and resource allocation requirements for the device, and the system-supplied INF (mf.sys) can install the multifunction device. You need to supply only a function driver and INF file for each of the individual device functions.

If the device does not comply with the standard for its bus, you might need to supply a driver equivalent to mf.sys in functionality, in addition to function drivers and INF files for the device functions.

To install a multifunction device, you typically provide a base INF file for the device and an additional INF file for each of the device's functions. The base INF file typically copies the INF files for the device's individual functions. For information about how to accomplish this, see Copying INFs.

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The following sections describe driver and installation requirements for various types of multifunction devices:

See INF File Sections and INF File Directives for information about INF file syntax.

The Windows Driver Kit (WDK) includes a separate section that describes how to support multifunction audio devices.

USBTrace is an easy to use and powerful USB analyzer (USB traffic sniffer) software. USBTrace can analyze USB protocol at host controllers, hubs and devices. This is a 100% software product. USBTrace supports Windows 2000, XP, 2003/2008 Server, Vista, Windows 7 and Windows 8/8.1 operating systems and works with USB 1.x, 2.0 and 3.0 (low, full, high & super speed) host controllers, hubs and devices.

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Sysnucleus Multifunction Devices Driver Updater

Key Features and Benefits of our USB protocol Analyzer

USBTrace is an invaluable tool for all those who develop/test firmware and drivers for devices which connect to the PC using the Universal Serial Bus.

• Easy to use
  USBTrace is an easy-to-use USB protocol analyzer. To analyze a USB device, just select the device and click the 'capture' button. See USBTrace Quick Start Guide.

• Sniffs USB requests at all levels
  With USBTrace you can analyze USB protocol traffic at USB Host Controllers, USB Hubs and USB devices. The tool captures and displays USB Control, Bulk, Interrupt & Isochronous transfers.

• Displays detailed device information
  USBTrace decodes and displays both standard and class specific USB descriptors (Device, Hub, Configuration, Interface, Endpoint, Class Specific, IAD, String) and Windows enumeration information.

• USBTrace does not use any filter drivers
  Unlike other software based USB analyzers, USBTrace does not use any filter driver to capture the USB requests. So USBTrace will not disturb/slow down the PnP system due to its presence.

• Captures all USB protocol data during device enumeration
  USBTrace is capable of capturing all USB requests exchanged between the host controller/hub and the device during device enumeration. See USB Enumeration Explained to know how USBTrace is different from other USB monitor software.

• Define your own data decoding templates in XML
  In addition to automatically decoding standard/class specific USB requests/descriptors USBTrace also lets you define custom templates for decoding data buffer of requests in XML. Know more

• Displays valuable information for device driver developers
  The IRP, URB and IO_STACK_LOCATION structures associated with each captured request is decoded and displayed by USBTrace. Also, in addition to capturing URBs, USBTrace captures Internal USB IOCTLs, User mode USB IOCTLs, PnP and Power IRPs. See Complete List of USB requests captured by USBTrace.

  USBTrace also allows device driver developers to capture USB requests made/received by any device object in the USB device stack.

• Supports device class decoding / Write your own vendor specific class decoder
  USBTrace can decode class specific usb descriptors/requests and display detailed information regarding them. The classes currently supported are Hub, HID, Mass Storage, Bluetooth, Wireless USB HWA, Still Image Capture, Printer, Audio, Video, Smart Card, Vendor specific device class etc. Read more about USB device class decoding

• Export Captured Data & Detailed Device Information
  Captured data can be exported as HTML, XML, Text or CSV reports. Detailed device information can also be exported. This feature will help you to document the device behavior as well as to share the captured data/device details in an easily readable form with others.

  

{For more details see USBTrace Features or Online Help Manual}

USBTrace USB Analyzer in Action

We recommend that you download the evaluation version or take the product tour to learn more about the features of our USB Analyzer.

Sysnucleus Multifunction Devices Driver Wireless

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