Lucent Technologies manual USS-720 USB Port Monitor

Page 93

Application Note

February 1999

USS-720

USB Port Monitor

Description

A port monitor is responsible for the communication between the Windows* spooler and a printing device. It controls the I/O port to which the physical printer is connected and is responsible for the communication channel between the spooler and the print device.

Typically, the port monitor communicates with base I/O drivers (e.g., serial and parallel drivers) for device I/O, but it may also call different interfaces, such as Windows sockets, SCSI, USB, etc.

Note: For more speciﬁcs on the Windows spooler and port monitors, see the Windows 95/98 DDK documentation.

The USB Port Monitor, developed by In-System Design, enables printing from Windows applications using the ISD USB Smart Cable. It is included in the USS-720 Evaluation Kit to demonstrate a functional use of the USS-720 device. Figure 1 shows how the USB Port Monitor is included in the Windows spooler.

The USB Port Monitor is installed during the Plug and Play installation of the ISD USB Smart Cable. At initialization, the spooler calls the USB Port Monitor to obtain a current list of USB ports available on the host. Once initialization is complete, the spooler has a record of which USB ports exist, and which printers are associated with each USB port. When the spooler determines that a particular spooled job can be printed, it calls the USB Port Monitor to perform the following:

■Notify the start of the print job,

■Send data to be written to the printer,

■Request data to be read from the printer, and

■Notify the end of the print job.

For a description of the data and control ﬂow in and out of the USB Port Monitor, please refer to the Design and Implementation Notes of the Windows 95/98 DDK.

* Windows is a registered trademark of Microsoft Corporation.

Lucent Technologies Inc.

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Contents Information Manual, Rev September IntroductionTable of Contents September USB-to-IEEE Bridge Information Manual, Rev Evaluation Kit for USS-720USS-720 USB Device Driver Preliminary User Guide IOCTL1284 TerminateIOCTLSET1284REGISTER USS-720 USB Port Monitor Application Note Evaluation Kit Contents \SAMPLES Hardware RequirementsGetting Started Instructions OSR2.1 Cable Installation InstructionsWindows 98 Cable Installation Instructions Software UpdatesUSB Driver and Port Monitor Plug and PlayPort Creation Eeprom Lucent Technologies Inc In-System Design, Inc Lucent Technologies Microelectronics GroupUSB Applications Support September USS-720 Driver Software Object Code License Agreement Evaluation Kit SoftwareFebruary IntroductionLicensed Software USS-720 Software Use Agreement FebruaryFurnishing of Licensed Software OwnershipFebruary Software Use Agreement USS-720Agreement Prevails Warranty and IndemnityNothing Construed 04 ConﬁdentialityNonassignability PublicityAddresses IntegrationDisputes Applicable LawUSS720.SYS USS720.INFDocumentation USS-720 Software Use Agreement February Application Note, Rev February Software ComponentsCustomer-Deﬁned Data Plug and Play Operation PnPPrinter Enumeration Installation Process Power ManagementOperating Systems Supported USB Hardware Types SupportedPrint Types Supported Printer Types SupportedFeatures Preliminary Data Sheet, Rev SeptemberDescription Table of Contents Preliminary Data Sheet, Rev USS-720 Pin InformationUSB-to-IEEE Parallel Port nSelectIn Signal Active-Low Parallel Port nAutoFd Signal Active-LowParallel Port nInit Signal Active-Low Parallel Port nAck Signal Active-LowUSB Port OverviewDevice Descriptor, Conﬁgurations, and Inter- faces Descriptor LocationsUSB-to- Ieee 1284 Bridge September Onboard Device DescriptorDevice Descriptor Offset Field Size Value Description Conﬁguration Descriptor USB-to- IeeeBulk Out Endpoint Descriptor, I0A0E1 Interface DescriptorsSeptember USB-to-IEEE1284 Bridge Bulk Out Endpoint Descriptor, I0A1E1Bulk In Endpoint Descriptor, I0A1E2 Bulk Out Endpoint Descriptor, I0A2E1 Bulk In Endpoint Descriptor, I0A2E2Interrupt Endpoint Descriptor, I0A2E3 Pipes RequestsStandard Requests Get Port Status Data Bit Description Printer Class-Speciﬁc RequestsVendor-Speciﬁc Requests GET1284REGISTERSET1284REGISTER Register-Based Operation Ieee 1284 PortGET1284REGISTER Data Byte Register Data RegistersInterrupt Pipe Read Data Byte Register DataStatus Register Address Bit Symbol Default Bit Symbol Bit DescriptionParallel Port nFault Signal Reserved Access Default Bit Symbol Bit Description Control Register Address Bit SymbolParallel Port nInit Signal USB-to-IEEE1284 BridgeUSS-720Instant USB ECP Command Register Address Bit Symbol Access Mode20 Description Extended Control Register Address Bit SymbolUSS-720 Control Register Address Bit Symbol USS-720 Setup Register Address Bit Symbol Interrupts External Crystal Connection External Circuitry RequirementsHigh Drive Mode Filter Bypass ModeSelf-Powered Mode Absolute Maximum Ratings Parameter Symbol Min UnitParameter Symbol Test Conditions Min Typ Max Unit Electrical CharacteristicsCapacitance Values Parameter Unit Clklo ClkhiTiming Characteristics Setup and Hold Input Timing ParameterOutput Delay Timing Parameter Min Max Unit Ordering Information Outline DiagramPin Mqfp Device Code Package ComcodeApplication Note February Description Port ParallelBridging USB to Typical Circuit Showing USSLucent Technologies Inc Preliminary User Guide, Rev February Signal DirectionsIOCTL1284 Setmode O File Functions InitializationPreliminary User Guide, Rev USS-720 February USB Device DriverCreateFile ReadFile Error CodesWriteFile DeviceIoControl CloseHandle Control Code Description O Control CodesParameters IOCTL1284 EcpfwdtorevIOCTL1284ECPREVTOFWD IOCTL1284 Ecpsetchannel IOCTL1284 Setmode Register Mode DescriptionIOCTL1284 Terminate Value Description IoctlabortpipeBulkoutpipe BulkinpipeIoctlcancelpiperequest IOCTLGET1284REGISTER ALTINTERFACE0 IoctlgetaltsettingALTINTERFACE1 ALTINTERFACE2Ioctlgetcapabilities Ioctlgetconfigurationdescriptor Ioctlgetdevicedescriptor Ioctlgetdeviceinstances Ioctlgetinterface Bit Meaning IoctlgetportstatusCommand Description IOCTLISSUEUSS720COMMANDByte Description IoctlreadinterruptpipeIoctlresetpipe IOCTLSET1284REGISTER Ioctlsetaltsetting Ioctlsoftreset Deviceinstanceheader O Control Data StructuresDeviceinstance Data StructureREGISTER1284, *PREGISTER1284 REGISTER1284ADVREGISTER1284, *PADVREGISTER1284 ADVREGISTER1284Lucent Technologies Inc USS-720 USB Port Monitor Printer Cable with Instant USB USS-720 Application Note USB Port Monitor FebruaryW98USS720EvalKit2402.zip to download the installation ﬁles Software Installation InstructionsApplication Note June Click on Enter LibrarySeptember MN99-052CMPR-1 Replaces MN97-061CMPR-04