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E8491B Configuration and User`s Guide

1. enable the reading to be stored iprintf e1410 MEM VME STAT 1 n initiate the multimeter to take the readings iprintf e1410 INIT n pause 30s to allow readings to complete and to transfer to shared memory Sleep 30000 Chapter 3 VXI Programming Using the IEEE 1394 Serial Bus 55 transfer the 8000 readings from the multimeter using the SICL function iblockmovex the parameters are id source handle source offset source width source increment destination handle destination offset destination width destination increment count and swap iblockmovex e8491 map 0 8 1 O unsigned long rdgs 8 1 64000 0 swap the bytes once they are transferred from shared memory for i1 0 1 lt 7999 i SWAP_FLOAT64 amp rdgs il print some readings to verify the transfer was successful for 1 0 i lt 10 i printf Slf n rdgs i unmap memory lunmapx e8491 map I_MAP_SHARED 0 1 close the device sessions iclose e8491 close SICL interface session iclose e1410 close SICL device session Comments 1 Because of the E1410 multimeter data storage format eight bytes reading the readings are transferred from shared memory to the PC in bytes Therefore it is necessary to swap each byte in order to re construct the reading Depending on the storage formats of your particular
2. set an immediate trigger errStatus hpel563_trigEvent vi 1 hpe1563_TRIG_IMM 0 0 check vi errStatus set the minimum sample period errStatus hpel563_sampTim vi hpe1563_SAMP_TIM_MIN check vi errStatus disable digitizer error detection hpe1l563_errorQueryDetect vi 0 initiate the digitizer errStatus hpel563_initImm vi pause 3 ms 1 3e 6 2000 to allow readings to complete Sleep 3 fetch readings from the digitizer s A24 space errStatus hpel563_fetchAll_O vi dataArrayLen VilInt32 rdgs amp numRdgs confirm readings transferred are valid by printing first 5 readings dataPtr ViInt16 rdgs query digitizer reading range errStatus hpel563_range_Q vi 1 amp range printf Reading samples are n n for i 0 i lt 10 it 2 printf Slf n n dataPtr i range 32768 38 VXI Programming Using the IEEE 1394 Serial Bus Chapter 3 reset digitizer following the transfer errStatus hpel563_reset vi close the device session hpe1563_close vi HP VXIplug amp play session J RRR RK KK KKK KK KK I I I I I I A I I I I kK Kk error checking routine void check ViSession vi ViStatus errStatus VilInt32 inst_err ViChar err_message 256 if VI_SUCCESS gt errStatus if hpel563_INSTR_ERROR_DETECTED errStatus query instrument error hpel563_dcl vi send a device clear
3. hpel410_sampCoun vi 8000 check vi errStatus store the readings in HP E8491B shared memory specify the E8491B shared memory base address errStatus hpel410_memVmeAddr vi start_addr check vi errStatus specify the amount of memory required 8000 readings 8 bytes reading errStatus hpel410_memVmeSize vi 64000 check vi errStatus enable the readings to be stored errStatus hpel410_memVmeStat vi 1 disable multimeter error detection hpel410_errorQueryDetect vi 0 initiate the multimeter to take the readings errStatus hpel410_initiImm vi pause 30s to allow readings to complete Sleep 30000 transfer the 8 000 readings 64 000 bytes from the multimeter using the VISA function viMovelIn8 err viMoveln8 fw VI_A24_ SPACE 0 64000 ViPUInt8 rdgs if err lt VI_SUCCESS err_handler fw err swap the bytes once they are transferred from shared memory for 1 0 1 lt 7999 i SWAP_FLOAT64 amp rdgs i print some readings to verify the transfer was successful for i1 0 i lt 10 itt printf Slf n rdgs i 52 VXI Programming Using the IEEE 1394 Serial Bus Chapter 3 close the device sessions hpel1410_close vi close E1410 session viClose fw close E8491 session J BRK RK KK KKK RK KK KK KK I I I Kk Kk I I I KK I KKK error checking ro
4. hpe1l563_error_query vi amp inst_err rr_message display the error printf Instrument Error ld s n inst_err rr_message else get driver error message hpe1563_error_message vi errStatus err_message display the error printf HP E1563 Driver Error ld s n errStatus err_message hpel563_reset vi reset the digitizer hpel563_close vi close the digitizer handle exit 1 return Comments 1 The maximum block transfer size allowed by the HP E1563A hpe1563_fetchAll_Q function is 2 000 bytes 2 This manual is included on the HP I_O Libraries CD By viewing the manual from the CD you can cut and paste this program into your development environment 3 The section Using HP E8491B Shared Memory contains an example of block data transfers using HP SICL Chapter 3 VXI Programming Using the IEEE 1394 Serial Bus 39 Block Transfers using This program performs a block transfer of 60 000 readings using the HP VISA HP E1563A digitizer and the HP VISA function viMoveIn32 1563visa CPP This program configures the HP E1563A digitizer using its VXIplug play driver and then transfers a block of 60 000 readings from the digitizer s FIFO memory to the computer using the VISA viMovelIn32 function include hpe1563 h include the driver header fil include visa h include lt stdio h gt include lt stdlib h gt inc
5. see Editing the HP E8491B Configuration later in this chapter 5 Set the E1406 servant area to include the logical addresses of those instruments it is to control Note E1406 servant area E1406 logical address 1 through E1406 logical address servant area switch setting 6 Install the E1406 in slot 0 If the E1406 is not the slot 0 device its slot O functionality must be disabled From step 2 above set the E1406A Slot 0 and System Controller switches to Disable From step 4 set its VME BTO Disable switch 1 and ensure that VME Bus Timeout BTO on the E8491B is set to On If you are using the E8491B in a configuration with multiple mainframes linked with VXI MXI extender cards the E8491B must be the resource manager however VME Bus Timeout BTO must be disabled off Step 4 above Again the E8491B is generally installed in mainframe slot 0 so that it also provides the system s slot 0 functionality Refer to the MXI documentation for configuration guidelines based on where the E8491B is installed Where to go Next If you are installing the IEEE 1394 interface for the first time Continue with Step 3 Installing VXI Instruments If your VXI instruments are already installed Proceed to Step 4 Installing the HP I O Libraries Step 3 Installi Ng Generally any VXI instrument can be installed in any slot other than slot 0 VXI Instruments When installing instruments notice that
6. Green Active indicator shows communication to instrument Correct interface name and logical address shown Figure 2 15 Soft Front Panel Indicating PC Mainframe Communication Viewing the Resource Another way to determine if your system is properly configured is to view Manager Output the output of the resource manager The easiest way to view the output is using the I O Libraries I O Config utility 1 Press the HP I O Libraries Control icon in the lower right hand side of your monitor and select Edit VXI Resource Manager In the Resource Manager pop up window select RM Output The resource manager output will show the VXI Current Configuration with all devices it can communicate with listed in the VXI Device Table 2 Click on Start gt gt Programs gt gt I_O Config to bring up the I O Config window Figure 2 11 2a Select the Configured Interfaces name corresponding to the E8491B to bing up the HP E8491 VXI Board Configuration window Figure 2 12 30 Interface Installation and Configuration Chapter 2 m Advanced Settings 2b Perform steps 1 2 and 3 in Figure 2 16 G I Enable External Ch External Trig In TTL C CMOS C ECL C Other YME Bus Request Level ss s gg C Dut YME Bus Timeout BTO Auto C On C Off State r Level 1 Select Enable Advanced to activate the Advanced Settings controls 2 C
7. Map Device Name ax200008 x21fffFF E8491ictlr A32 Device Name No devices mapped into A32 space Interrupt Request Lines Handler Interrupter 123456 2345 6 C SICLNT bin gt Starting address of E8491B shared memory hexadecimal Figure 3 3 Partial Listing of Resource Manager Output Showing Shared Memory Mapping Exam ple Prog FaMS The following examples show an application using the E8491B s shared memory In the program 8 000 readings are taken with the HP E1410 multimeter Because the E1410 has only enough memory to store 4 096 readings internally all 8 000 readings are stored in shared memory and then transferred to the PC Given the shared memory size of 128 kBytes and the E1410 storage format of eight bytes reading up to 16 000 readings can be stored Figure 3 4 illustrates the reading transfers performed with the following programs Chapter 3 VXI Programming Using the IEEE 1394 Serial Bus 49 Readings are taken and transferred from the instrument to E8491B shared memory over the VXI backplane Readings are transferred in blocks from shared memory to the PC over the IEEE 1394 serial bus Figure 3 4 Storing Readings in Shared Memory Storing Readings in This example uses the HP E1410 VXIplug amp play driver to configure the Shared Memory multimeter take the readings and store them in E8491B shared memory HP HP VISA Example VISA function
8. PCI expansion slots usually white or ivory a aE shared slot Figure 2 2 Locating a PCI bus Expansion Slot Note Many computer PCI systems have one pair of ISA and PCI slots close to each other This saves space and allows you to install either an ISA card or a PCI card in the slot pair 3 Remove the corresponding expansion slot cover from the computer chassis Figure 2 3 expansion slot cover Figure 2 3 Removing the PC Expansion Slot Cover Chapter 2 Interface Installation and Configuration 15 4 Align the bus contacts on the bottom of the host adapter with the PCI bus slot Carefully but firmly press the adapter into the slot Host Adapter Figure 2 4 Installing the Host Adapter 5 Secure the host adapter bracket to the computer chassis with the screw from the expansion slot cover removed in step C Connecting the Power Cable 6 Connect the power cable between the adapter and the PC as shown in Figure 2 5 This provides power from the adapter to devices along the interface via the interface cable This allows you to cycle power on any VXI mainframe in multi frame systems without affecting other frames The power is also available to other IEEE 1394 devices that may be part of the interface network The host adapter is capable of supplying 12V with a maximum current draw of 0 5 amps total to all three IEEE 1394 connectors 16 Interface Installation and Configuration Chap
9. cf Configuration File The ttltrig cf Configuration File The vximanuf cf Configuration File The vximodel cf Configuration File Utility Function Appendix B Overview Using ivxisc The irg cf file is a database that maps specific interrupt lines to VXI interrupt handlers If you have non programmable interrupters and you want the interrupters to be recognized by a VXI interrupt handler you must make an entry in this file Additionally if you have progammable interrupters and you want them to be recognized by a device other than what s assigned by the resource manager the commander of that device you can make an entry in this file to override the default Keep in mind that not all VXI devices need to use interrupt lines and not all interrupt lines need to be assigned Note that any interrupt lines assigned in this file cannot also be assigned in the vmedev cf configurtion file This file is edited by selecting Edit mapping of VXI devices to interrupt lines in the Resource Manager window Figure B 2 The ttltrig cf file contains the mapping of VXI devices to TTL trigger lines in extended VXI systems If you have a MXI extended multiple mainframe system and you are sending receiving triggers between mainframes you must map the TTL trigger line to the logical address of the device asserting the trigger This file is only used for extended VXI systems This file is edited by selecting Edit mapping of VXI dev
10. from the CD you can cut and paste this program into your development environment Storing Readings in This example uses the HP E1410 VXIplug amp play driver to configure the Shared Memory SICL multimeter take the readings and store them in E8491B shared memory Example SICL functions are used to transfer the readings from shared memory to the PC SHAR_SICL CPP This program demonstrates how to access the HP E8491B s shared memory The program stores readings taken by the HP E1410 multimeter in HP E8491B shared memory and then transfers those readings from shared memory to the computer incl incl incl incl lude lude lude lude sicl h lt stdio h gt lt stdlib h gt lt windows h gt project files SHAR_SICL cpp SICL32 1lib set up byte swap function for readings transferred from E8491B shared memory to the PC define SWAP_FLOAT64 rdgs unsigned char src 8 double src signed signed signed signed signed signed signed signed un un un un un un doubl rdgs n YUYRDOUBWNHE ODO FF FF HF e OrFRPNWHA OOD gt qaQaqaagaagaaaa qaQaqaQaagagaaa ain void INST e8491 handle for SICL session it 191 INST e1410 handle for SICL session to E1410 struct vxiinfo info structure for data returned by ivxirminfo unsigned long start_addr star
11. the window partial view in Figure B 2 Figure B 1 Editing Configuration Files from the I O Config Utility 70 Editing the HP E8491B Resource Manager Configuration Appendix B Advanced Settings oO Resource Manager Del VME Bus Request Level s 8 oO In Seconds m External Trig Resource Manager in C Out TIL State C CMOS ECL Level l Enable External Clock Other fis I Use all of 24 432 HL YME Bus Timeout BTO Auto C On C Off 3 Check Enable Advanced and then click Resource Manager amp Resource Manager This utility allows you to edit the Resource Manager configuration files and or to run the Resource Manager m Choose a configuration function evices Add delete values to be written to logical address space Add delete VME devices that use resources Edit commander servant hierarchy Edit list of dynamically configured devices Edit mapping of VI devices to interrupt lines Edit mapping of VI devices to ttl trigger lines 4 Select the portion of the configuration to edit and then click Edit AM Output Done Help Figure B 2 Editing Configuration Files from the I O Config Utility cont d Appendix B Editing the HP E8491B Resource Manager Configuration 71 The names cf The names cf file is a database that contains a list of symbolic names to Configuration File assign VXI devices that have been con
12. the E8491B and the IEEE 1394 bus do not extend the VXI backplane between frames in multi frame VXI systems MXI cards are required This means that the multimeter and multiplexers in a VXI scanning multimeter for example must be installed in the same mainframe in adjacent slots Devices sharing the VXI Local bus must also be installed in the same mainframe 20 Interface Installation and Configuration Chapter 2 Installing C size Figure 2 8 shows the installation of C size instruments Instruments seat the module by g pushing in the extraction levers retaining screws extraction levers EES 7 slide the module into the mainframe until it plugs into the backplane connectors Figure 2 8 Installing C size Instruments Caution To prevent damage to the VXI instruments being installed remove power from the mainframe or set the power switch to Off or Standby before installing the instruments 1 Insert the instrument into the mainframe by aligning the instrument with the card guides inside the mainframe Slowly push the instru ment into the slot until it seats in the backplane connectors The front panel of the instrument should be even with the front edges of the mainframe 2 Tighten the retaining screws on the top and bottom of the module WARNING Allinstruments within the VXI mainframe are grounded through the mainframe chassis During installation tighten th
13. transfers can occur on the same bus Chapter 4 IEEE 1394 Fundamentals and Interface Overview I arbitration gap 59 Asynchronous Data During an asynchronous data transfer a variable amount of data is Transfers transferred to an explicit address in real time and an acknowledgement is returned Data is transferred across the IEEE 1394 bus in packets called subactions An asynchronous subaction is made up of three parts arbitration sequence the period when a device requests control of the bus in order to transmit a data packet data packet the data packet consists of a data prefix that contains information about the transaction the data itself e g VXI instrument commands and a data end signal The maximum packet size is 2 kByte for 400 Mbit adapters such as the adapter supplied with the E8491B acknowledgement a code returned by the addressed data destination indicating the action taken by the receiver The periods between subactions are called subaction gaps The subaction gap allows devices that have not had control of the bus during the current fairness interval to arbitrate for control Fair Arbitration Protocol The fair arbitration protocol is based on the fairness interval shown in Figure 2 A fairness interval consists of one or more subactions in which data packets are transferred over the bus A fairness interval is as follows 1 The interval begins when devices HP E8491B s arbitrat
14. 1993 A3 1994 A4 1996 EN60950 1992 A1 1993 A2 1993 A3 1995 A4 1997 UL 1950 EMC CISPR 22 1993 A1 1995 EN55022 1992 A1 1995 Class A CISPR 11 1990 EN55011 1991 Group Class A EN50082 1 1997 IEC 61000 4 2 1995 4k VCD 8kVAD IEC 61000 4 3 1995 3 V m IEC 61000 4 4 1995 1kV Power Line 0 5kV Signal Lines IEC 61000 4 5 1995 1kV CM 0 5 kV DM IEC 61000 4 6 1996 3 Vrms IEC 61000 4 11 1994 30 10ms 80 100ms Supplementary Information The product herewith complies with the requirements of the Low Voltage Directive 73 23 EEC and the EMC Directive 89 336 EEC inclusive 93 68 EEC and carries the CE mark accordingly Tested in a typical configuration in an HP C Size VXI mainframe March 5 1999 Jad QA Manager For Compliance Information ONLY contact Australian Contact Product Regulations Manager Hewlett Packard Australia Ltd 31 41 Joseph Street Blackburn Victoria 3130 Australia European Contact Your local Hewlett Packard Sales and Service Office or Hewlett Packard GmbH Department HQ TRE Herrenberger Stra e 130 D 71034 B blingen Germany FAX 49 7031 14 3143 USA Contact Product Regulations Manager Hewlett Packard Company P O Box 301 Mail Stop BU212 Loveland CO 80537 Notes Please fold and tape for mailing Reader Comment Sheet HP E8491B IEEE 1394 PC Link to VXI Configuration and User s Guide Edition 2 You can help us improve our manuals by sharing your c
15. 2 Appendix A Specifications se essssesosesossenosesososoosssonososessosososesoseosesososesossers 12 Appendix B Editing the HP E8491B Resource Manager Configuration 12 Additional Information csccssscsscssscesssscssscsssssssessssscssscsssscssscesssesssessessssssseeses 12 Chapter 2 Interface Installation and Configuration ccccsscccssssscccssssccscsssssscssssscscssssscesees 13 Using this Chapter cssccssscsssccsscssscescssscescsscssscssneccsncssessssssesssscssocssnecenessosssscsseesses 13 Step 1 Installing the IEEE 1394Host Adapter ssccssscssscsssssssssessssssssssesesenes 13 Where to 0 NeXt ccccccsccsscsssosssensssnscescscsscssssssssssesessnsscsssscssnessnesssssessscoese 17 Step 2 Installing the HP E8491B Interconnect cccssccssssscssscsssssssscesensseseseees 17 Alternate Configurations cccccccsscsscssscsssssscssssscsssssscessnssssssssssssssssssssssssesens 19 Where to 0 NOX ccccccsscssscsscssssnssenssesscsscsssscsssssessssnsscssssssssessnesssssessscese 20 Step 3 Installing VXI Instrument ccccccsscessssssscsssnsssssscssscssesssssesssessnessneseees 20 Installing C size Instruments cccccsccssssscssscssscssscssscsssssesessessssessescessesses 21 Installing A and B size Instrument cscccsccsscssscssscsssenssesesesssescsseesseesees 22 Step 4 Installing the HP I O Libraries sccsscsssssscessscssscssscssesscessecessesssseeses 24 Configurin
16. 3 V verifying the installation 29 viewing the resource manager output 30 vmedev cf 72 VXI characteristics specifications 65 VXI data transfers 60 VXI instruments installation 20 installing A B size 22 installing C size 21 vximanu cf 73 vximodel cf 73 VXI MXI systems using the E8491B with 19 VXIplug amp play drivers installation 28 Index 79 80 Index
17. C PC A second connection creates a closed loop and is not allowed Figure 2 7 IEEE 1394 Interface Configurations Note Alternate Configurations Chapter 2 T O performance is impacted slightly by the hardware configuration The VXI mainframe with the fewest number of hops cable links to the PC has the highest priority However each mainframe has equal access to the bus during each data transfer interval Refer to Chapter 4 IEEE 1394 Fundamentals and Interface Overview for information on the topology and terms associated with the IEEE 1394 bus Certain applications may include the HP E1406A Command Module as an HP IB interface to selected instruments In this configuration the E8491B must be the resource manager since its logical address is always 0 It is generally installed in mainframe slot 0 so that it also provides the system s slot 0 functionality If you want the E1406 to provide slot 0 functionality in addition to providing an HP IB interface set its configuration as follows 1 Set the E1406 logical address to a value other than 0 2 Set the Slot 0 and System Controller switches to Enable default 3 Set the CLK 10 source to Internal default 4 Set the VME BTO Disable switch to 0 Enable default Set VME Interface Installation and Configuration 19 Bus Timeout BTO on the E8491B to Off
18. CI to IEEE 1394 Host Adapter The HP I O Libraries Using this Manual Chapter 2 Interface Installation and Configuration Chapier 1 The IEEE 1394 Serial Bus FireWire is a high speed bus that has been implemented as an I O interface between external PCs and HP VXI systems The bus links the PC backplane to the VXI mainframe backplane This manual describes the implementation configuration and use of this interface Implementation of the IEEE 1394 serial bus as an I O interface for HP VXI systems is provided through three components and two operating systems HP E8491B PC Link to VXI Interconnect e OHCI compatible PCI to IEEE 1394 Host Adapter HP I O Libraries e WIN 95 and WIN NT operating systems The HP E8491B is the VXI hardware that links the VXI mainframe backplane to the IEEE 1394 serial bus The E8491B is a 1 slot C size message based device that is installed in mainframe slot 0 The OHCI PCI to 1394 Host Adapter card is installed in the PC and links the computer s PCI backplane to the IEEE 1394 bus The OHCI adapter has three external IEEE 1394 ports and can support up to 16 HP E8491Bs The HP I O Libraries provide the HP VISA and HP SICL drivers required to use the HP E8491B Included with the libraries are the drivers for the OHCI compatible host adapter This manual is organized to help you install configure and begin using the IEEE 1394 serial bus as quickly and efficiently as possible The followin
19. Command Module The HP I O Libraries Though not a common configuration the HP E1406 command module can be used in the same mainframe as the HP E8491 to provide HP IB access to instruments In this configuration however the E8491B must be the mainframe s resource manager See the section titled Alternate Configurations in Chapter 2 page 19 The software required to use the IEEE 1394 interface in a VXI system is contained in the HP I O Libraries and HP VXIplug amp play Drivers The software supports the Windows 95 and Windows NT platforms The software stack shown below shows the relationship of the VXIplug amp play drivers to HP VISA SICL to the host adapter drivers and to the VXI instruments Notice that Hewlett Packard s implementation of the IEEE 1394 interface requires HP VISA and will not work with the VISA supplied by other vendors Development Environment C C Visual BASIC HP VEE HP Universal Instrument HP VXI plug amp play Instrument Drivers Drivers HP I_O Libraries HP VISA HP SICL Host Adapter Drivers VXI Instruments Figure 4 6 System Software and Drivers Most application programs are written using the instruments VXIplug amp play drivers The plug amp play driver functions make subsequent calls to the VISA functions and so on Message based instruments can be programmed at the HP VISA SICL level by embedding SCPI commands in th
20. Contents HP E8491B IEEE 1394 PC Link to VXI Configuration and User s Guide Edition 2 Safety SYMBOLS ccsscccsccssccccsscectseccsssessccscseccsteosessccsscessecscdececieccssacenssesscescsscocsensesecssiecssee 6 WARNINGS R E E E E E E 6 Declaration Of Conformity ccccscscsrscssscssscsscsnssesscssscccsssssscessnesenescsssssssssessnessnssoess 7 Reader Comment Sheet sscccsccoctseccseccssscesscessccecotsccssseesscccsccsotdesssecssreccstcessceccosecorsaeesse 9 Chapter 1 Introduction cccccsscsscssssecsscsscsesssescnccsacsecssssesceccsscssnsscssssecsscssaesssescesecsssssessseseessesses 11 Using the IEEE 1394 Serial Bus in VXI Systems se esesescsessonososessosososesssossosssesosesssss 11 Component Overview cccrccsscesccescesccescsccsscscsnsssnesssscssscsssscesscesssesssessscsssessesses 11 The HP E8491B PC Link to VXI Interconnect eeseeseesoeseesoeeoeseesoeoosesesososeee 11 The OHCI Compatible PCI to IEEE 1394 Host Adapter ssssssssesssees 11 The HP I O Libraries ccsscssssssscssscssscsssssseesssscsssscscessnscssnesssssesssecesssessesens 11 Using this Manual ccccccsscsssssssssssessscnsscssscsssssssnsessssnessscscscssscssnessnesssssesssooese 11 Chapter 2 Interface Installation and Configuration scccccssccssscssscssesesenes 11 Chapter 3 VXI Programming Using the IEEE 1394 Serial Bus csssseee 12 Chapter 4 IEEE 1394 Fundamentals and Interface Overview 00seesseee 1
21. D VI_TRIG_TTLO to VI_TRIG_TTL7 VI_TRIG_ECLO to VI_LTRIG_ECL1 viAssertTrigger VI_TRIG_PROT_DEFAULT Chapter 3 VXI Programming Using the IEEE 1394 Serial Bus 43 Asserting Triggers HP SICL ivxitrigoff ivxitrigon ixtrig I_TRIG_ALL I_TRIG_TTLO to I_TRIG_TTL7 I_TRIG_ECLO to I_TRIG_ECL1 I_TRIG_EXTO0 specifies faceplate Trig Out port Routing Triggers HP SICL ivxigettrigroute ivxitrigroute I_TRIG_ALL I_TRIG_TTLO to I_TRIG_TTL7 I_TRIG_ECLO to I_TRIG_ECL1 I_TRIG_EXTO0 specifies faceplate Trig Out and Trig In ports Configuring the E8491B Configuration of the E8491B external Trig In and Trig Out ports is done Trig In and Trig Out Ports through the HP I O Libraries I O Config utility This portion of the utility is shown in the following figure Advanced Settings ME Bus Request Level ss 8s o Resource Manager Delay 5 In Seconds s External Trig Resource Manager in C Out YME Bus Timeout BTO Auto cur ee On fail C CMOS Level C off l Enable External Clock C A l Other 1 6 M Use all of 424 432 Figure 3 1 Configuring the HP E8491B External Trigger Ports When External Trig In is selected the faceplate Trig In port is configured for the trigger level and state normally high or normally low selected When External Trig Out is selected the faceplate Trig Out p
22. HP VISA block data transfers 40 HP VXIplug amp play block data transfers 37 storing readings in shared memory HP VISA 50 storing readings in shared memory SICL 54 triggering 45 external trigger input specifications 66 external trigger output specifications 66 F fair arbitration 60 first time configuration 24 H host adapter and interface cable overview 61 HP E1406 using the command module with the HP E8491B 64 HP E8491B connecting the host adapter 18 installation 17 overview 62 triggering 43 HP I O Libraries installation 24 overview 64 HP VXIplug amp play drivers installation 28 Index 77 T O Libraries installation 24 iclear 75 IEEE 1394 bus features 58 data transfer protocol 59 topology and terminology 57 IEEE 1394 host adapter installation 13 installation A B size instruments 22 C size instruments 21 host adapter 13 HP E8491B 17 HP I O Libraries 24 HP VXIplug amp play drivers 28 verifying 29 VXI instruments 20 installation problems troubleshooting 33 Installing 21 22 instrument sessions opening 35 interface cable and host adapter overview 61 interface characteristics specifications 65 iproc 33 IRQ line 33 irg cf 73 ivxisc 73 L loading power supply 67 locating E8491B shared memory 47 locating shared memory using HP SICL 48 using HP VISA 48 message based instruments programming 35 MXI using the E8491B with MXI systems 19 N n
23. S TO ME SUP nents peter ae equipment or permanent loss of data WARNINGS The following general safety precautions must be observed during all phases of operation service and repair of this product Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use of the product Hewlett Packard Company assumes no liability for the customer s failure to comply with these requirements Ground the equipment For Safety Class 1 equipment equipment having a protective earth terminal an uninterruptible safety earth ground must be provided from the mains power source to the product input wiring terminals or supplied power cable DO NOT operate the product in an explosive atmosphere or in the presence of flammable gases or fumes For continued protection against fire replace the line fuse s only with fuse s of the same voltage and current rating and type DO NOT use repaired fuses or short circuited fuse holders Keep away from live circuits Operating personnel must not remove equipment covers or shields Procedures involving the removal of covers or shields are for use by service trained personnel only Under certain conditions dangerous voltages may exist even with the equipment switched off To avoid dangerous electrical shock DO NOT perform procedures involving cover or shield removal unless you are qualified to do so DO NOT operate damaged equ
24. SICL Interface Name field You can change the VISA interface number using the up down arrows next to the VISA Interface Name field The SICL and VISA interface names and numbers do not have to be the same 26 Interface Installation and Configuration Chapter 2 Editing the HP E8491B Configuration on Windows 95 Platforms Chapter 2 Make a note of the interface name and number as they are used in addressing instruments in the mainframe see Chapter 3 VXI Programming Using the IEEE 1394 Serial Bus for more information The Help button provides information on each item in the window After installing the HP I O Libraries and configuring the HP E8491B on the Windows 95 platform an hp icon is placed in the bottom right corner of your PC monitor Figure 2 13 a Hide Resource Manager Messages Edit VXI Resource Manager Refresh VXI Resource Manager Run VISA Assistant Run 1 0 Contig View Documentation Run Event Viewer VISA Logging Hide HP 1 0 Control Exit C About HP 1 0 Libraries Control 3 59 PM J Figure 2 13 Editing Your Configuration on Windows 95 Platforms Clicking on the icon brings up the following menu items Hide Resource Manager Messages Enable disable displaying resource manager messages during mainframe power on or during a E8491B reset Edit VXI Resource Manager Allows you to edit the Resource Manager configuration files and or to run the Resource Manager Refres
25. Trig In port to VXI backplane TTL trigger line 4 ivxitrigroute e8491 I_TRIG_EXTO I_TRIG_TTL4 E1412 Multimeter configuration set a 50s timeout period for external trigger to occur itimeout e1412 50000 configure the multimeter for DCV measurements iprintf e1412 CONF VOLT DC 8 0 n set the fastest aperture time iprintf e1412 VOLT DC APER MIN n turn off the autozero function iprintf e1412 ZERO AUTO OFF n Chapter 3 VXI Programming Using the IEEE 1394 Serial Bus 45 set the trigger source iprintf e1412 TRIG SOUR TTLT4 n trigger line 4 set the sample count iprintf e1412 SAMP COUN 10 n 10 readings initiate the multimeter iprintf e1412 INIT n printf Press Enter to trigger the voltmeter n getchar output a trigger pulse on the E8491B Trig Out connector the trigger is then input to the Trig In connector via a jumper wire and routed to TTL trigger line 4 which triggers the multimeter ixtrig e8491 I_TRIG_EXTO fetch the readings once the trigger is received ipromptf e1412 FETC n S 101f dcv_rdgs display the readings for i 0 i lt 10 i printf Slf n dcv_rdgs i close the device sessions iclose e8491 close SICL interface session iclose e1412 close SICL device session Comments 1 For demonstatio
26. Trigger Output ccssssscssscssscssssseescssssssscesenssssssessssssssscesssessesens 66 Trigger Delays ccccccsssssssscsscsssscssscssscsssssssssssscsssscscscsssesssesssssssssscessssssesens 67 COONS cesssss seasscdeossedednssesseoasassenseonseesbasscconsoed cossesddsassosesssesssconsssesssisesconssesaes 67 Power Supply Loading ccssccssscssscssscssssssessscscssscscessnsssssssssssesssssessosssesens 67 Appendix B Editing the HP E8491B Resource Manager Configuration scsssscscsrecscceeeeee 69 MINORS ENAT NTO AAT ET 69 Configuration File Overview e sesssseeseeeseseesessoeeoesoseoesoeseseoeeoesescoeeoseoeeoesoseoeeosseseo 69 The names cf Configuration File e e seessessesoeseessesoeseseoeeoeseeeoeeoreeseoeooseoeeoseeseo 72 The oride cf Configuration File sssssssssissesssesssserosssosossosssevsusssocsssvsssovsssssiessssste 72 The vmedev cf Configuration File s ssscssscscssssscsssssssssscssesssssssssssessesens 72 The cmdrsrvt cf Configuration File sccsscssscscsssssscsssssssssscssscsssssssssssssesees 72 The dynamic cf Configuration File scssscssscsssssssscsssssssssscssscssssssssssessesens 72 The irg cf Configuration File ccccssscsssssscssscsssscsssccssnsssssscssssssssssesssesssees 73 The ttltrig cf Configuration File sscccsssssssscsssssscsssnsssssscsssssssssssssssssesees 73 The vximanuf cf Configuration File csscssssssscssscssscsssssssssssessecsssscsssesses 73 The vx
27. ames cf 72 78 Index O opening instrument sessions 35 HP VISA 36 HP VXIplug amp play 35 SICL 36 optimizing programs 36 oride cf 72 P PCI BIOS 33 plug amp play drivers installation 28 porting SICL programs 36 power supply loading 67 programming register based and message based VXI instruments 35 pull up Trig Out port 47 R register based instruments programming 35 resource manager 33 viewing the output 30 resource manager configuration editing 26 running the resource manager 33 S shared memory 47 locating using HP VISA 48 locating using SICL 48 shared memory examples 49 SICL programs porting for use with the E8491B 36 soft front panels for installation verification 29 specifications CLK 10 66 cooling 67 external trigger input 66 external trigger output 66 general 65 interface characteristics 65 power supply loading 67 trigger delays 67 storing readings in shared memory HP VISA example 50 SICL example 54 T Trig In specifications 66 Trig In port configuring 44 Trig Out port configuring 44 specifications 66 trigger delay specifications 67 triggering 43 example 45 pull up 47 troubleshooting installation problems 33 ttltrg cf 73 turning on the mainframe 33 U Using 47 using HP E8491B shared memory 47 using instrument soft front panels 29 using the HP E8491B with the HP E1406 Command Module 64 utility functions 73 iclear 75 ivxisc 7
28. anager Output partial listing Interface Installation and Configuration Chapter 2 Troubleshooting Installation Problems Running the Resource Manager Chapter 2 Note The following list of troubleshooting items may help you get your HP E8491B interface working properly if you have encountered problems verifying installation 1 It is very important that you upgrade the PC BIOS to the latest version your PC manufacturer provides whether your PC is new or old Many early versions of the PCI BIOS contained bugs Upgrading to the latest version of BIOS will eliminate those bugs upgraded by the new BIOS A BIOS upgrade and a video driver upgrade may be required to fix PCI related problems even on a new PC 2 Make sure the PCI BIOS is correctly configured New PC s have a BIOS flag that usually reads Plug amp Play OS or Running Windows 95 This must be set appropriately for the OS you are using Win 95 is a plug amp play OS whereas Win NT is not 3 The HP E8491B requires installation of the PCI to IEEE 1394 host adapter card in a bus mastering PCI slot Consult your PC s user manual to determine which slots are bus mastering it is possible that all slots are bus mastering 4 In addition to the above you may need to move the HP E8491B toa separate IRQ line in the PC PCI allows up to four devices sharing an IRQ line However due to bugs in some cards this doesn t always work and you may need to have on
29. ble Threshold 0 4V Accuracy Threshold Sensitivity hysteresis 0 5 Vpp maximum 0 1 Vpp minimum Input Load 50 pf 55 kohms Maximum Rate 2 MHz Minimum Pulse Width 200 ns Connector SMB on faceplate Levels nominal pull up to 5V Maximum External Pull Up 30V Sink Current 10 mA Va lt 0 4V or 150 mA Va lt 1 0V Appendix A Trigger Delays Cooling Power Supply Loading Appendix A Maximum delay from TTLTRG to 60 ns ECLTRG Maximum delay from ECLTRG to 60 ns TTLTRG Maximum delay from Trig In port 300ns to ECLTRG or TTLTRG Maximum delay from TTLTRG or 100 ns ECLTRG to Trig Out port Watts slot 20W A P mm H30 0 10 Air flow liters s 2 0 Ipm amps Ibm amps 5V 2 5 0 001 12V 0 35 0 050 12V 0 015 0 001 24V 0 0 0 0 24V 0 0 0 0 5 2V 0 180 0 001 2V 0 360 0 001 Specifications 67 68 Specifications Appendix A Appendix B Editing the HP E8491B Resource Manager Configuration Introduction The resource manager functionality provided through the HP E8491B configures your VXI system based on rules specified by the VXI standard The configuration can be viewed or modified through the configuration files and utility functions outlined in this appendix Configuration File Configuration files c
30. braries and configuring the HP E8491B Clicking on the HP icon brings up a pop up menu like that shown in Figure 2 13 Click on Run I O Config Either method described in this step brings up a configuration window similar to Figure 2 11 Select HP E8491 in the Available Interface Types box and click the Configure button 170 Config Interface Configuration Application File Options Help This utility configures 1 0 interfaces It must be run whenever a new 1 0 interface is installed in the computer or when changes need to be made to an existing 1 0 interface To configure a new interface select it in the Available Interface Types list and click on Configure To edit a previously configured interface select it in the Configured Interfaces list and click on Edit Gonfaure Available Interface Types r Configured Interfaces SICLName VISA Name Auto Add VEI i int V interface number Remove Figure 2 11 The HP I O Libraries I O Contig Utility The HP E8491B uses the SICL interface name vxi and the VISA interface name VXI Figure 2 12 The VISA interface number is assigned by the I O Config utility and is unique to each E8491B The interface name and number identify each mainframe in multi frame VXI systems and are also used in addressing each instrument in the mainframe The unique interface number allows instruments with the same logical addresses to be instal
31. dler ViSession vi ViStatus err void main void ViSession vi defaultRM fw ViStatus errStatus err unsigned long start_addr starting address of shared memory ViReal64 rdgs 8000 array for readings from shared memory inti I ViChar err_message 256 open a VXIplug play device session and reset the multimeter errStatus hpel410_init E1410 0 1 amp vi if VI_SUCCESS gt errStatus hpel1l410_error_message vi errStatus err_message printf Unable to open s n E1410 printf hpel410_init returned error message s n err_message return open a VISA session to the E8491B viOpenDefaultRM amp defaultRM viOpen defaultRM E8491 VI_NULL VI_NULL amp fw get E8491B shared memory base address viGetAttribute fw VI_ATTR_MEM BASE amp start_addr enable multimeter error detection hpel410_errorQueryDetect vi 1 set a 5s timeout period to allow functions to complete errStatus hpel410_timeOut vi 5000 check vi errStatus configure the multimeter for DCV measurements Chapter 3 VXI Programming Using the IEEE 1394 Serial Bus 51 errStatus hpel410_confVoltDc vi check vi errStatus turn off autorange set a 30V DCV range errStatus hpel410_voltDcRang vi 0 30 check vi errStatus set a 10 us aperture time errStatus hpel410_voltDcAper vi 10 0e 6 check vi errStatus set 8000 readings errStatus
32. e instruments retaining screws to secure the instrument to the mainframe and to make the ground connection Chapter 2 Interface Installation and Configuration 21 22 Installing A and B size Instruments Caution WARNING A and B size instruments can also be installed in the mainframe These instruments are installed using a module carrier HP E1403C A B size Module Carrier extends the P1 connector on the VXIbus backplane and mounts the A B size modules flush with C size modules This carrier is recommended for Hewlett Packard B size slave only devices which have the P1 connector HP E1407A A B Module Carrier extends the Pland P2 connectors on the VXIbus backplane This carrier is recommended for B size slave only devices which have the P1 P2 connectors To prevent damage to the VXI instruments install the instruments when the mainframe is turned off Figure 2 9 shows the installation of a B size instrument using a module carrier The procedure is described in the following three steps 1 Install the HP E1403 or E1407 A B size Module Carrier into the mainframe This is done by aligning the top and bottom of the carrier with the card guides and slowly pushing the carrier into the mainframe The front of the carrier should be even with the front edges of the mainframe 2 Slide the A or B size instrument into the carrier until it connects 3 Tighten the retaining screws on the top and bottom of the ins
33. e HP E8491B Resource Manager Configuration 73 where lt logical unit gt is the value from the Logical Unit window in the HP I O Libraries I O Config utility An example of the output produced by ivxisc is shown in Figures B 3 and B 4 As VXI Current Configuration URI Bus Device Logical Addresses Slots 6 1 9 16 11 12 Empty 0 Single Device x Multiple Devices URI Device Table Name LADD Slot Bus Manufacturer E849ictlr O Hewlett Packard 1394 UXI Controll w Slot devi Hewlett Packard E1412 6 5 Digit Multime UME Device Table EUT Bus Slot No UME cards configured Failed Devices Bus Slot Manufacturer FAILED devices detected Protocol Support lt Msg Based Devices Name CMDR SIG MSTR INT FHS SMP RG EG ERR PI PH TRG I4 I LW ELW 1 3 E849ictlr X X X X devi R x Figure B 3 Output of ivxisc 74 Editing the HP E8491B Resource Manager Configuration Appendix B Commander Servant Hierarchy E8491ict lr devi y Device Name 6x266666 x21fffFF E849ictlr Device Name No devices mapped into A32 space Interrupt Request Lines Handler Interrupter Name a oe eg sa oe eg E849ictlr RRRRR KR devi C SICLNT bin gt Figure B 4 Output of ivxisc cont d Using iclear The iclear function is used to clear the interface HP E8491B or individual message based instruments in the VXI mainframe iclear is executed from the DOS command prompt siclnt bin or sicl95 bin d
34. e HP VISA SICL functions 64 IEEE 1394 Fundamentals and Interface Overview Chapter 4 Appendix A Specifications The following specifications define the operating and performance characteristics of the HP E8491B Interface Characteristics Operating System Windows 95 Windows NT Controllers PC based I O Library SICL VISA Backplane PCI Interface IEEE 1394 16 bit 1 76 MBytes s to PC Maximum I O Speed 2 50 MBytes s to HP E8491B 200 MHz Pentium PC 32 bit 1 0 MByte s to PC 1 0 MByte s to HP E8491B 400 MHz Selectron Host Languages C C Visual Basic HP VEE LabView VXI Characteristics General VXI Device Type Message based commander Appendix A Data transfer bus n a Slot 0 functionality Yes Resource Manager Functionality Yes MXIbus Resource Manager Yes Size C Slots 1 Connectors P1 P2 Shared Memory 128 kBytes VXI busses TTL trigger bus ECL trigger bus C size compatibility n a Specifications CLK 10 External Trigger Input External Trigger Output 66 Specifications Clk In Input TTL Frequency Stability 100 ppm Duty Cycle 50 5 Clk Out Output TTL Frequency Stability 100 ppm Duty Cycle 50 5 Connector SMB on faceplate Levels TTL CMOS ECL 0 to 33V Programmable Threshold 0 to 30V Range Programma
35. e IRQ per card Moving the IRQ is not easy and whether it can be done will depend on which operating system you are using and on the details of the BIOS implementation of your PC The I O Libraries Control utility must be running to enable the resource manager to run The resource manager initializes and prepares the VXI system for use The I O Libraries Control utility is installed when the E8491B interface is configured using I O Config It can be accessed by clicking on the HP logo in the lower right hand corner of your Windows panel The resource manager will run when mainframe power is applied or cycled the E8491B faceplate Reset button is pressed activated from the I O Config utility activated from the I O Control icon see Figure 2 13 In VXI systems with multiple E8491Bs mainframes individual mainframes can be turned off without affecting other mainframes in the system When a mainframe is turned on the resource manager reconfigures the mainframe The resource manager will only run if the I O Libraries Control utility is started Interface Installation and Configuration 33 34 Interface Installation and Configuration Chapter 2 Chapter 3 VXI Programming Using the IEEE 1394 Serial Bus Using this Chapter This chapter contains examples and general information for programming VXI systems over the IEEE 1394 serial bus The contents of the chapter include Programming Regist
36. e for control of the bus 2 When a device is granted control it transfers its data packet and is then disabled from arbitrating until the next fairness interval 3 A subaction gap occurs after the previous data packet is transferred During this period remaining devices arbitrate for the bus The next device granted the bus transfers its data packet and is then disabled from arbitrating until the next fairness interval 4 The fairness interval ends after each device has had an opportunity to access to the bus and the arbitration reset gap which is longer than the subaction gap occurs The arbitration reset gap re enables each device for arbitration during the next fairness interval VXI Data Transfers To take advantage of the IEEE 1394 data transfer protocol large amounts of data should be transferred between VXI instruments and the PC using block transfers During a block transfer data is divided into the packets described previously the number of packets depends on the amount of data and whether a 200 Mbit or 400 Mbit host adapter is used Compared to protocols that transfer data one byte or one word at a time transfer speed between the instrument and the PC is increased because the IEEE 1394 protocol overhead is associated with the fairness interval and with each packet rather than with each byte or word transferred Thus transfer speeds bits second over the IEEE 1394 bus increase as the amount of data transferred block size i
37. each device in the system acts as a repeater the power supplied to a device that is turned off enables signals to be transferred across that device This maintains signal continuity throughout the system The HP E8491B PC The E8491B is a VXI C size device Figure 4 5 normally installed in mainframe slot 0 With a logical address of 0 the E8491B functions as the to VXI Interconnect mainframe s resource manager via software included with the I_O libraries The E8491B has 128 kBytes of shared RAM and contains many of the clock and triggering features found on the HP E1406A Command Module a VXI resource manager slot 0 device common in many GPIB based systems A VXI mainframe with the HP E8491B in slot 0 can also be powered on off at any time without affecting other mainframes in the system The HP E8491B IEEE 1394 interconnect links the VXI backplane to the IEEE 1394 bus However the E8491B and the IEEE 1394 bus do not extend the VXI backplane between frames in multi frame VXI systems This means that the multimeter and multiplexers in a VXI scanning multimeter for example must be installed in the same mainframe Devices sharing the VXI Local bus must also be installed in the same mainframe V XI Local bus 62 IEEE 1394 Fundamentals and Interface Overview Chapter 4 Chapter 4 Annunciators Failed a hardware failure was detected in the HP E8491B or the E8491B is performing a Failed IEEE self test Oc OOw IEEE 1394 indicate
38. ed Memory demonstrates the use of this function and attribute Locating Shared Memory Using SICL For SICL programs the E8491B shared memory starting address is found using the function ivxirminfo This function fills the structure struct vxiinfo The item within the structure containing the starting address is memstart The SICL version of the example program showing the use of shared memory demonstrates the use of this function and structure Locating Shared Memory by Viewing the Resource Manager Output The third method of determining the E8491B s shared memoty starting address is to view the resource manager output Viewing the Resource Manager Output in Chapter 2 describes how this is done using the I O Config utility Figure 3 3 shows the section of the output that indicates A24 address mapping Another way to view the output is using the SICL ivxisc utility contained in the lt drive gt siclnt bin or sicl95 bin directory This utility is an executable that is used with the SICL logical unit number see Editing the HP E8491B Configuration in Chapter 2 to return the configuration output of the resource manager Again Figure 3 3 shows a partial listing of the output Note Refer to Appendix B for additional information on using ivxisc and for an example of the complete configuration output 48 VXI Programming Using the IEEE 1394 Serial Bus Chapter 3 Commander Servant Hierarchy E849ictlr devi y
39. er Based and Message Based TMSURUIMORES aior a uian on Mater thee r E Mueneldotale da asd 35 Opening Instrument Sessions 0200000 35 Optimizing Programs 0 0 0 0 cece eee eee ee 36 HP E8491B Triggering 0 0 0 eee eee eee 43 e Using HP E8491B Shared Memory 47 Programmin There are no SCPI instrument drivers for register based instruments 8 H i installed in or downloaded to the HP E8491B Therefore register based Register Based and instruments are programmed over the IEFE 1394 bus using either their Message Based VXI VX plug amp play drivers or through register level peeks and pokes using Instruments FP VISA or SICL Message based instruments are programmed using HP VXIplug amp play drivers or using SCPI commands embedded in HP VISA or SICL function calls VXIplug amp play drivers for HP register based and message based instruments are contained on the HP Universal Instrument Drivers CD which ships with each HP VXI instrument Opening Instrument Programs which run over the IEEE 1394 interface begin by opening a Sessions session between the VXI instrument and the driver or I O library VISA or SICL An address that includes the interface name and number described in Chapter 2 and the instrument s logical address is used in opening these sessions Following are three segments that open sessions to an E1563A Digitizer in HP VXIplug amp play HP VISA and SICL prog
40. ever the bus s fair arbitration protocol covered in the next section ensures that each device has equal access to the bus and that devices closer to the root are not continually granted the bus IEEE 1394 Data Transfer Protocol Data transfer over the IEEE 1394 bus can be either asynchronous or isochronous Hewlett Packard s IEEE 1394 based VXI systems use asynchronous data transfers and a fair arbitration protocol to ensure each VXI mainframe has equal access to the bus Figure 4 2 illustrates the concepts of asynchronous data transfers and fair arbitration VXI mainframe 1 VXI mainframe 3 VXI mainframe 2 data packet Fln mainframe 1 or 2 block transfer data packet data packet Fairness Interval mainframe 1 or block transfer data packet data packet data packet n 2 mainframe 3 arb seq data packet ack arb data seq packet ack arb seq data packet ack l subaction 1 arbitration rest gap subaction 2 subaction gaps subaction 3 Figure 4 2 IEEE 1394 Data Transfer Protocol 1 Isochronous data transfers broadcast variable amounts of data at regular intervals with no acknowledgement Isochronous and Asynchronous data
41. f extension are placed in the lt drive gt siclnt defaults Overview sicl95 defaults directory when the HP I O Libraries are installed Except where noted the following files can be edited from the HP I O Libraries T O Config utility Figure B 1 as shown on the following pages When editing a file note the following 1 Add your entry ies below the commented lines 2 The first column must contain an entry Any number of spaces can separate remaining entries on the line Appendix B Editing the HP E8491B Resource Manager Configuration 69 A _O Readme 1 From the _O Libraries program SCPI Readme E LAN Server 4 SICL Help E VISA Assistant 4 VISA Assistant Help group click _O Config 170 Config Interface Configuration Application File Options Help This utility configures 1 0 interfaces It must be run whenever a new 1 0 interface is installed in the computer or when changes need to be made to an existing 0 interface To configure a new interface select it in the Available Interface Types list and click on Configure To edit a previously configured interface select it in the Configured Interfaces list and click on Edit Available Interface Types m Configured Interfaces SICL Name VISA Name GPIBO Auto Add HP 2075 GPIO HP E8491 SCPI LAN Client LAN Server YI Command Module HemGve 2 Select the Onfigured HP E8491B interface and then click Edit This brings up
42. figured The ivxirm utility reads the model id number from the VXI device and the ivxisc utility uses that information and this file to print out the VXI device symbolic name If you add a new VXI device to your system that is not currently in the database you may want to add an entry to this file This file is edited by selecting Add delete symbolic names of VXI devices in the Resource Manager window Figure B 2 The oride cf The oride cf file contains values to be written to logical address space for Configuration File register based instruments This data is written to A16 address space after the resource manager runs but before the system s resources are released This can be used for custom configuration of register based instruments every time the resource manager runs This file is edited by selecting Add delete values to be written to logical address space in the Resource Manager window Figure B 2 The vmedev cf The vmedev cf file contains a list of VME devices that use resources in the Configuration File VXI cardcage Since the resource manager is unable to detect VME devices the resource manager uses this information to determine such things as the slot number where the VME device is located what type A16 A24 or A32 and how much memory it uses and what interrupt lines it uses Additionally the resource manager verifies that multiple resources aren t allocated This file is also used by the ivxisc utility to pr
43. g information outlines the contents of the other chapters and identifies the areas of programming a VXI system that are NOT covered in this manual This chapter contains information on installing the HP E8491B hardware and its drivers the HP I O Libraries Also included is information on installing VXI instruments installing HP VXIplug amp play drivers and on verifying the system Introduction 11 Chapter 3 VXI Programming Using the IEEE 1394 Serial Bus Chapter 4 IEEE 1394 Fundamentals and Interface Overview Appendix A Specifications Appendix B Editing the HP E8491B Resource Manager Configuration Additional Information Note 12 Introduction This chapter contains the information necessary to begin communicating with VXI instruments through the HP E8491B and IEEE 1394 serial bus The chapter contains information on optimizing system performance using block data transfers and also covers triggering and using HP E8491B shared memory This chapter describes the IEEE 1394 serial bus and how it is implemented in HP VXI systems It defines the bus terminology and data transfer protocol Appendix A contains the operating and performance specifications of the HP E8491B Appendix B contains information on editing your VXI system configuration as set by the resource manager It describes selected configuration files and utility functions used to view and modify your configuration Programming the HP E8491B is thro
44. g the HP E8491B Interconnect ccccssscsscesscessscssscessecsssssseeees 24 Editing the HP E8491B Configuration ccccsssssssscsssssssesscesssessssssessoes 26 Editing the HP E8491B Configuration on Windows 95 Platforms 000 27 Step 5 Installing HP VXIplug amp play Instrument Drivers cssccesssessscsseossenes 28 Step 6 Verifying the Installation sccssccsssscssssscsssnssensscssscsssssssssessessnessseseees 29 Using Instrument Soft Front Panels ccsscssscscsssssscsssssssssscssscssssssssseesoesees 29 Viewing the Resource Manager Output cccccscscssscssscsssesssssccssscssssesesenes 30 Troubleshooting Installation Problems sssscssssscsssscsssssssssscssscssssssssssessesees 33 Running the Resource Manager ccccccccsscssscssssscssscesscssscssscsessnsesesssessesssscsssesses 33 Contents 1 2 Contents Chapter 3 VXI Programming Using the IEEE 1394 Serial Bus 0 cccsccscssseseeecsscceesseeeeee 35 Using this Chapter ccssccssscsssccssccsscescssscesssssssssssnccssncssnssnsssosssscssossnecsnessesssscssoesees 35 Programming Register Based and Message Based VXI Instruments s 00008 35 Opening Instrument Sessions cccccccccsscssscssssssssssccssscssscesscsesesesssessesessssesses 35 Optimizing Programs ccccccccscssscsssccsssscesssesscssscesensssssssssssssssesssscscessnesssesees 36 Block Data Transfers cccsscsscsssscssscssscssssssesssssccs
45. h VXI Resource Manager Resets and runs the Resource Manger on all VXI mainframes in your system You must refresh re run the resource manager each time changes are made to its configuration NOTE The resource manager will run automatically whenever the mainframe is powered on Run VISA Assistant Activates the HP VISA Assistant utility This utility displays all devices connected to the interface and their VISA interface address It provides other information on drivers formatted I O memory and other attributes Formatted I O allows you to send a SCPI command to a device to confirm communication with the device or simply to set a command parameter or to query a device state Run I O Config Runs the I O Config utility and brings up the I O Config Interface Configuration Application window shown in figure 2 11 View Documentation Selects the Readme txt the VISA Help file or the SICL Help file for viewing Interface Installation and Configuration 27 Run Event Viewer Brings up the event viewer for viewing the Applications Log for your PC VISA Logging Enables disables the VISA logging runs the event viewer or the debug window Hide HP I O Control Removes the HP icon in the lower right hand corner of your Windows 95 NT window task bar To re install the icon go to the START button gt gt Programs gt gt HP I_O Libraries and click on HP I_O Libs Control Exit Terminates the HP I O Libraries Control No
46. hpel563_sampTim vi hpe1563_SAMP_TIM_MIN check vi errStatus disable digitizer error detection hpe1l563_errorQueryDetect vi 0 initiate the digitizer errStatus hpel563_initImm vi pause 78 ms 1 3e 6 60000 to allow readings to complete Sleep 78 transfer the 60 000 readings from the digitizer using the VISA function viMovelIn32 use the same session name vi opened for VXIplug play err viMovelIn32 vi VI_A16_SPACE 0x08 60000 ViPUInt32 rdgs if err lt VI SUCCESS err_handler vi err confirm readings transferred are valid dataPtr VilIntl6 rdgs query digitizer reading range errStatus hpel563_range_Q vi 1 amp range printf Reading samples are n n for i 0 i lt 10 i 2 printf Slf n n dataPtr i range 32768 reset digitizer following the transfer errStatus hpel563_reset vi close the device session hpe1563_close vi HP VXIplug amp play session J RRR RK KK KKK KK KK I I II I I I I I I KK I IK KK error checking routine void check ViSession vi ViStatus errStatus VilInt32 inst_err ViChar err_message 256 if VI_SUCCESS gt errStatus if hpe1563_INSTR_ERROR_DETECTED errStatus Chapter 3 VXI Programming Using the IEEE 1394 Serial Bus 41 query instrument error hpel563_dcl vi send a device clear hpe1l563_error_query vi amp inst_err rr_
47. ices to ttl trigger lines in the Resource Manager window Figure B 2 The vximanuf cf file contains a database that cross references the VXI manufacturer id numbers and the name of the manufacturer The ivxirm utility reads the manufacturer id number from the VXI device The ivxisc utility then uses that number and this file to print out the name of the manufacturer If you add a new VXI device from a vendor that is not currently in the file you may want to add an entry to the file This file can not be edited using I O Config The vximodel cf file contains a database that lists a cross reference of manufacturer id model id and VXI device names The ivxirm utility reads the model id number from the VXI device and the ivxisc utility uses that information and this file to print out the VXI device model If you add a new VXI device to your system that is not currently in this database you may want to add an entry to this file This file can not be edited using I O Config Within the lt drive gt siclnt bin or sicl95 bin directory are utility functions that view the resource manager output ivxisc and which clear the HP E8491B interface iclear and run the resource manager if the iproc utility is running The ivxisc function is used to view the resource manager output ivxisc is executed from the Windows command DOS prompt siclnt bin or sicl95 bin directory as ivxisc vxi lt logical unit gt Editing th
48. imodel cf Configuration File ccscsssssscssscssscsssssesessessscsssssssesees 73 Utility Function OVervicW ccccccsscesscesssscssccsssscsnsssecscssscsesssesscssssesssessesssssssesses 73 USING IVXISC cscccccssccssccssscesccssscsscesscescsscsssscssessnssessssesssesssssscesssessnessecsseceseesees 73 Using iClear sccccsccsccsscesscesscsscesscesessccsescssessnscssessssssesescesscesssessncssessssceseesses 75 INdeX EE E E E E E E E 77 Contents 3 4 Contents HEWLETT PACKARD WARRANTY STATEMENT HP PRODUCT HP E8491B IEEE 1394 PC LINK to VXI DURATION OF WARRANTY 3 years 1 HP warrants HP hardware accessories and supplies against defects in materials and workmanship for the period specified above If HP receives notice of such defects during the warranty period HP will at its option either repair or replace products which prove to be defective Replacement products may be either new or like new 2 HP warrants that HP software will not fail to execute its programming instructions for the period specified above due to defects in material and workmanship when properly installed and used If HP receives notice of such defects during the warranty period HP will replace software media which does not execute its programming instructions due to such defects 3 HP does not warrant that the operation of HP products will be interrupted or error free If HP is unable within a reasonable time to repair or replace any product to a condit
49. include the driver header fil include lt stdio h gt include lt stdlib h gt include lt windows h gt project files 1563vpnp cpp hpel563 1lib Specify the addressing path define E1563 VXI0 64 INSTR VXI addressing prototypes void check ViSession vi ViStatus error void main void ViSession vi ViStatus errStatus VilInt16 rdgs 2000 VilInt16 dataPtr pointer to cast readings to 16 bit integers ViReal64 range range variable for reading conversions IRG i3 long dataArrayLen 2000 return 2 000 readings using hpe1563_fetchAll_Q ViInt32 numRdgs ViChar err_message 256 dataPtr rdgs set pointer to rdgs array Chapter 3 VXI Programming Using the IEEE 1394 Serial Bus 37 open a VXIplug play device session and reset the digitizer errStatus hpel563_init E1563 0 1 amp vi if VI_SUCCESS gt errStatus hpe1l563_error_message vi errStatus err_message printf Unable to open s n E1563 printf hpel563_init returned error message s n err_message return enable digitizer error detection hpe1l563_errorQueryDetect vi 1 set a 5s timeout period to allow functions to complete errStatus hpel563_timeOut vi 5000 check vi errStatus configure the digitizer to take 2 000 post trigger readings not to exceed 4V on channel 1 errStatus hpe1563_configure vi 1 4 0 2000 1 check vi errStatus
50. ined in the following table Table 4 1 Definition of Terms Host Adapter Links the computer s PCI bus to the IEEE 1394 interface To use a host adapter computers must be PCI Rev 2 0 compliant HP E8491B Links the IEEE 1394 interface to the VXI backplane Provides the 1394 to VXI backplane s clock and trigger resources Interconnect Root Node Each device HP E8491B on the bus is a node In VXI systems the PC is always the root node having cycle master and bus master capabilities Branch Node A branch node has IEEE 1394 cables connected to two or more ports In Figure 1 VXI mainframe 1 is a branch node because of the 1394 cables connecting it to the PC root node and to VXI mainframe 3 on its right Leaf Node A leaf node has a single IEEE 1394 cable connected to it VXI mainframes 2 and 3 are leaf nodes Parent A node HP E8491B is a parent if it is physically connected closer to the root than an adjacent node In Figure 1 VXI mainframe 1 isa parent node because it is closer to the root than VXI mainframe 3 Child A node HP E8491B is a child if it is farther from the root than an adjacent node In Figure 1 VXI mainframe 3 is a child node because it is farther from the root than VXI mainframe 1 A node with a single IEEE 1394 cable connected to it leaf node is always a child VXI mainframe 2 Hop A hop is a IEEE 1394 cable link between nodes There can be
51. instruments swapping may not be necessary 2 This manual is included on the HP I O Libraries CD By viewing the manual from the CD you can cut and paste this program into your development environment 56 VXI Programming Using the IEEE 1394 Serial Bus Chapter 3 Chapter 4 IEEE 1394 Fundamentals and Interface Overview Using this Chapter This chapter contains reference information on the IEEE 1394 Serial Bus the data transfer protocol and on the related hardware The contents of the chapter include IEEE 1394 Topology and Terminology 57 IEFE 1394 Data Transfer Protocol 59 The OHCI Compatible Host Adapter and Interface Cable 61 The HP E8491B PC to VXI Interconnect 62 The HP I O Libraries 0 2 2 0 00 00 cece eee 64 IEEE 1394 Topology Optimizing the IEEE 1394 bus must include an understanding of the topology and terms associated with its use Figure 4 1 shows a VXI system and Terminology consisting of a PC and three VXI mainframes interconnected with the IEEE 1394 bus PC w IEEE 1394 to PCl host adapter VXI mainframe 1 VXI mainframe 3 VXI mainframe 2 HP 8491A IEEE 1394 F gt to VXI interconnect gt Figure 4 1 IEEE 1394 Topology and Terms Chapter 4 IEEE 1394 Fundamenials and Interface Overview 57 The terms shown in Figure 4 1 are def
52. int out information about the devices This file is edited by selecting Add delete VME devices that use resources in the Resource Manager window Figure B 2 The cmdrsrvt cf The cmdrsrvt cf file contains a commander servant hierarchy other than the Configuration File default for the VXI system The resource manager will set up the commander servant hierarchy according to the commander s logical addresses and the servant area switch However you can use this file to override the default based on the commandert s servant area This file should only contain changes from the default This file is edited by selecting Edit commander servant hierarchy in the Resource Manager window Figure B 2 The dynamic cf The dynamic cf file contains a list of VXI devices to be dynamically Configuration File configured You only need to add entries to this file if you want to override the default dynamic configuration assignment by the resource manager Normally if you have a dynamically configurable device and the logical address is set at 255 the resource manager will assign the first available address However if a dynamically configurable device has an entry in this file the resource manager will assign the address listed in the file This file is edited by selecting Edit list of dynamically configured devices in the Resource Manager window Figure B 2 72 Editing the HP E8491B Resource Manager Configuration Appendix B The irg
53. ion as warranted customer will be entitled to a refund of the purchase price upon prompt return of the product 4 HP products may contain remanufactured parts equivalent to new in performance or may have been subject to incidental use 5 The warranty period begins on the date of delivery or on the date of installation if installed by HP If customer schedules or delays HP installation more than 30 days after delivery warranty begins on the 31st day from delivery 6 Warranty does not apply to defects resulting from a improper or inadequate maintenance or calibration b software interfacing parts or supplies not supplied by HP c unauthorized modification or misuse d operation outside of the published environmental specifications for the product or e improper site preparation or maintenance 7 TO THE EXTENT ALLOWED BY LOCAL LAW THE ABOVE WARRANTIES ARE EXCLUSIVE AND NO OTHER WARRANTY OR CONDITION WHETHER WRITTEN OR ORAL IS EXPRESSED OR IMPLIED AND HP SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OR CONDITIONS OF MERCHANTABILITY SATISFACTORY QUALITY AND FITNESS FOR A PARTICULAR PURPOSE 8 HP will be liable for damage to tangible property per incident up to the greater of 300 000 or the actual amount paid for the product that is the subject of the claim and for damages for bodily injury or death to the extent that all such damages are determined by a court of competent jurisdiction to have been directly caused by a defective HP p
54. ipment Whenever it is possible that the safety protection features built into this product have been impaired either through physical damage excessive moisture or any other reason REMOVE POWER and do not use the product until safe operation can be verified by service trained personnel If necessary return the product to a Hewlett Packard Sales and Service Office for service and repair to ensure that safety features are maintained DO NOT service or adjust alone Do not attempt internal service or adjustment unless another person capable of rendering first aid and resuscitation is present DO NOT substitute parts or modify equipment Because of the danger of introducing additional hazards do not install substitute parts or perform any unauthorized modification to the product Return the product to a Hewlett Packard Sales and Service Office for service and repair to ensure that safety features are maintained Declaration of Conformity according to ISO IEC Guide 22 and EN 45014 Manufacturer s Name Hewlett Packard Company Loveland Manufacturing Center Manufacturer s Address 815 14th Street S W Loveland Colorado 80537 declares that the product Product Name IEEE 1394 PC Link to VXI Model Number HP E8491B Product Options All conforms to the following Product Specifications Safety IEC 61010 1 1990 A1 1992 A2 1995 EN61010 1 A1 1993 A2 1995 CSA C22 2 1010 1 1992 UL 3111 1 TEC 60950 1991 A1 1992 A2
55. irectory as iclear lt SICL interface name logical address gt SICL interface name is the name vxi listed in the I O Config SICL Interface Name window logical address is the address of the message based VXI instrument to be cleared If a logical address is not specified the E8491B interface is cleared and the resource manager is started Appendix B Editing the HP E8491B Resource Manager Configuration 75 76 Editing the HP E8491B Resource Manager Configuration Appendix B Index HP E8491B IEEE 1394 PC Link to VXI Configuration and User s Guide A alternate configurations 19 applying power 33 asynchronous data transfers 60 B BIOS 33 Block 36 37 40 block data transfers 36 using HP VISA 40 using HP VXIplug amp play drivers 37 bus mastering PCI slot 33 C CLK 10 specifications 66 cmdrsrvt cf 72 configuration file overview 69 configuration files cmdrsrvt cf 72 dynamic cf 72 irq cf 73 names cf 72 oride cf 72 ttltrg cf 73 vmedev cf 72 vximanuf cf 73 vximodel cf 73 configuring the E8491B interconnect 24 configuring the Trig In and Trig Out ports 44 connecting the HP E8491B to the host adapter 18 cooling 67 D data transfer protocol 59 asynchronous transfers 60 fair arbitration 60 data transfers over VXI 60 dynamic cf 72 E E1406 using the E8491B with 19 E8491B configuring 24 editing the configuration 26 Windows 95 platforms 27 examples
56. le PCI to IEEE 1394 Host Adapter Included with the the IEEE 1394 adapter is a cable for powering IEEE 1394 devices and a 4 5m interface Host Adapter cable WARNING Refer to your computer s documentation for specific instructions about the installation of PCI adapters Note If your personal computer PC currently has a Solectron OHCI403 PCI to IEEE 1394 host adapter a later version OHCI compatible PCI to IEEE 1394 host adapter or a built in IEEE 1394 port proceed to Step 2 Installing the HP E8491 Interconnect Chapter 2 Interface Installation and Configuration 13 The layout of a typical host adapter is shown in Figure 2 1 12 VDC Power Connector gt A A I ae External IEEE 1394 Connectors Figure 2 1 Layout of a Typical OHCI Compatible PCI to IEEE 1394 Host Adapter WARNING Turn off and disconnect the power to your computer and to any peripheral devices before installing the host adapter Refer to your computer s documentation for specific instructions about the installation of PCI adapters 1 Remove the computer chassis cover to expose the expansion slots and external access covers 2 Locate an unused unobstructed PCI bus expansion slot Figure 2 2 that supports bus mastering PCI bus slots are usually white or ivory See your computer documentation to determine if the PCI slot supports bus mastering 14 Interface Installation and Configuration Chapter 2
57. lected instruments contain functions that perform block transfers You will need to consult the driver help file to determine if the driver for a particular instrument supports block transfers The following HP VISA functions perform block transfers over the IEFE 1394 serial bus viMoveln8 viMoveOut8 viMove viMoveln16 viMoveOut16 viMoveAsync viMoveln32 viMoveOut32 36 VXI Programming Using the IEEE 1394 Serial Bus Chapter 3 The following extended SICL function is unique to the HP E8491B must be used on the E8491B and is used for block transfers over the bus iblockmovex Additionally the extended SICL functions shown below must be used when porting SICL programs to the IEEE 1394 bus from other I O interfaces imapx iunmapx ipeekx8 ipeekx16 ipeekx32 ipokex8 ipokex16 ipokex32 These functions are covered in detail in the SICL documentation The following examples demonstrate how to set up and perform block transfers using HP VXIplug amp play and HP VISA functions Block Transfers using This program performs a block transfer of 2 000 readings using the HP VXIplug amp play Drivers HP E1563A digitizer and its VXIplug amp play driver 1563VPNP CPP This program transfers a block of 2 000 readings from the HP E1563 digitizer to the computer using the VXIplug play driver s hpe1l563_fetchAll_O function 2 000 readings is the maximum number of readings that can be transferred using the function include hpel563 h
58. led in different mainframes but in the same system Interface Installation and Configuration 25 The Locate button on the HP E8491 VXI Board Configuration screen can be used to help you identify and keep track of all the mainframes in a multi mainframe system HP E8491 XI Board Configuration x Questions Press the Help Button below Recommended default values are shown K ce Cage Number 0x0060b000 Firmware Versions a TOO0001e8 External a 001 018 Internal a 007 01 8 hiy Logical Unit fi 6 Available 4 001 018 Bootlnfo ost f7 Defaults SICL Interface Name vsi VISA Interface Name xio Locate Edit VISA Config Advanced Settings l Enable Advanced WHEE Si Si eles hs Request Eye JME Bus timeout ETH HAE ce ute Co Figure 2 12 Editing the HP E8491B Configuration 5 Figure 2 11 returns with the SICL Name and VISA Name inserted Click OK to close the utility and complete the configuration Editing the HP E8491B When it is necessary to edit your configuration click I_O Config in the Configuration HP I O Libraries program group Figure 2 10 To edit the HP E8491B click highlight the configured interface vxi VXIO in the utility Figure 2 11 This activates the Edit and Remove buttons at the bottom of the window If you want to change the SICL interface name and number to something more descriptive use the
59. lick Resource Manager to bring up the window below Resource Manager OF x This utility allows you to edit the Resource Manager configuration files and or to run the Resource Manager Choose a configuration function Add delete Sepang to ape anten to logical peraan space Add delete VME devices that use resources Edit commander servant hierarchy Edit list of dynamically configured devices Edit mapping of VI devices to interrupt lines Edit mapping of VI devices to ttl trigger lines Edit Click RM Output to view the resource manager output Figure 2 16 Viewing the Resource Manager Output using I O Config Chapter 2 Interface Installation and Configuration 31 32 Figure 2 17 is a partial listing of a typical resource manager output FA ivxisc txt Notepad of xi Fie Edit Search Help VXI Current Configuration UXI Bus 6 Device Logical Addresses 6 25 64 Slots 612 3 4 5 6 8 9 16 11 12 Empty 0 0 0 000 0 0 0 0 0 Single Device Multiple Devices UME Failed UXI Device Table Name LADD Slot Bus Manufacturer E8491ctir 6 Hewlett Packard E8491 relaymux 6 Hewlett Packard E1345 LA_64 64 4 6 Hewlett Packard E1563A slot number unknown UME Device Table Name Bus Slot Space Size No UME cards configured Failed Devices Name Bus Slot Manufacturer No FAILED devices detected 1394 UXI Contr 16 ch 3W rela 2 Channel 366K Figure 2 17 Typical Resource M
60. lude lt windows h gt project files 1563visa cpp hpel563 lib VISA 1lib specify the addressing path define E1563 VXI0 64 INSTR VXI addressing prototypes void check ViSession vi ViStatus error void err_handler ViSession vi ViStatus err void main void ViSession vi ViStatus errStatus err VilInt32 rdgs 60000 ViReal64 range range variable for reading conversions VilInt16 dataPtr pointer to cast readings to 16 bit integers int i ViChar err_message 256 open a VXIplug amp play device session and reset the digitizer errStatus hpel563_init E1563 0 1 amp vi if VI_SUCCESS gt errStatus hpe1l563_error_message vi errStatus err_message printf Unable to open s n E1563 printf hpel563_init returned error message s n err_message return enable digitizer error detection hpe1l563_errorQueryDetect vi 1 set a 5s timeout period to allow functions to complete errStatus hpel563_timeOut vi 5000 check vi errStatus configure the digitizer to take 60 000 post trigger readings not to exceed 4V on channel 1 errStatus hpe1563_configure vi 1 4 0 60000 1 check vi errStatus 40 VXI Programming Using the IEEE 1394 Serial Bus Chapter 3 set an immediate trigger errStatus hpel563_trigEvent vi 1 hpel563_TRIG_IMM 0 0 check vi errStatus set the minimum sample period errStatus
61. message display the error printf Instrument Error ld s n inst_err rr_message else get driver error message hpe1563_error_message vi errStatus err_message display the error printf HP E1563 Driver Error ld s n errStatus err_message hpel563_reset vi reset the digitizer hpel563_close vi close the digitizer handle exit 1 return J RRR RK KK KK KK KK I I II I I II I I I I I I KK I I Ok Error handling function void err_handler ViSession vi ViStatus err char buf 1024 0 viStatusDesc vi err buf printf ERROR s n buf return Comments 1 A single instrument session opened with the hpe1563_init function can be used by both HP VXIplug amp play driver function calls and by HP VISA function i e viMoveln32 calls 2 This manual is included on the HP I_O Libraries CD By viewing the manual from the CD you can cut and paste this program into your development environment 3 The section Using HP E8491B Shared Memory contains an example of block data transfers using HP SICL 42 VXI Programming Using the IEEE 1394 Serial Bus Chapter 3 HP E8491B Triggering The HP E8491B is capable of asserting receiving and routing trigger signals along the VXI mainframe backplane trigger lines In addition to the VXI backplane s eight TTL level trigger lines and two ECL level trigger li
62. n y y y the E8491B s A24 address space and is available to those VXI instruments Shared Memory capable of mapping and accessing A24 memory Shared memory is often used as a temporary storage space for data transfers between the PC and VXI instruments HP instruments with the ability to store and receive data from shared memory generally implement the SCPI Standard Commands for Programmable Instruments MEMory VME subsystem shown below MEMory VME SIZE MEMory VME ADDRess MEMory VME STATe Corresponding HP VXIplug amp play functions are hpexxxx_memVmeAddr hpexxxx_memVmeSize hpexxxx_memVmeStat where xxxx 1s the instrument model number Locating E8491B Shared In order to use the E8491B shared memory you must first locate the starting Memory address of the memory as mapped by the resource manager see Running the Resource Manager in Chapter 2 The address varies from system to system depending on the number of devices that use A24 memory The address can be determined programatically using HP VISA or SICL or by viewing the resource manager output Each method is described in the following sections Chapter 3 VXI Programming Using the IEEE 1394 Serial Bus 47 Locating Shared Memory Using HP VISA For HP VISA programs the E8491B shared memory starting address is obtained using the function viGetAttribute and the VXI interface attribute VI_ATTR_MEM_BASE The HP VISA version of the example Storing Readings in Shar
63. n purposes the trigger signal output from the Trig Out port ixtrig function is routed to the Trig In port using a jumper wire The signal is then routed to TTLTRG4 ivxitrigroute function 2 The external trigger routed to TTLTRG4 can also be routed to any or all of the VXI backplane trigger lines 3 When using the faceplate Trig In and Trig Out ports notice that both ports are specified using I_TRIG_EXTO In the program ivxitrigroute e8491s I_TRIG_EXTO I_TRIG_TTL4 routes the trigger received on the faceplate Trig In port to backplane TTL trigger line 4 ixtrig e8491s I_TRIG_EXTO outputs a trigger pulse on the Trig Out port which is connected by a jumper wire to the Trig In port 4 This manual is included on the HP I O Libraries CD By viewing the manual from the CD you can cut and paste this program into your development environment 46 VXI Programming Using the IEEE 1394 Serial Bus Chapter 3 Trigger Pull Up Trigger signals output from the E8491B Trig Out port can be pulled up to 30V as shown in Figure 3 2 V Pull Up Voltage 30V Max E8491B TRIG OUT SMB Connector Output Trigger State LH Normally Low High True Output Trigger State HL Normally High Low True Default Figure 3 2 Using a Pull Up on the HP E8491B Trig Out Port Using HP E8491B The 8491B has 128 kBytes of shared VME memory This memory is i
64. ncreases 60 IEEE 1394 Fundamentals and Interface Overview Chapter 4 OHCI Com patible The OHCI compatible PCI to IEEE 1394 host adapter is a PC plug in card capable of transferring data at up to 400 MBits second The adapter has three Host Adapter and external IEEE 1394 ports Each OHCI adapter represents one bus segment Interface Cable capable of supporting up to 63 nodes If required the OHCI adapter can supply 12V with a maximum total current of 0 5A to all three 1394 ports for IEEE 1394 devices that require power The layout of a typtical adapter is shown below 12 VDC Power Connector External IEEE 1394 Connectors Figure 4 3 Layout of a Typical OHCI PCI to IEEE 1394 Host Adapter The interface cable supplied with the host adapter has two power wires and two signal twisted pairs A cross section of the cable and the cable connector is shown in Figure 4 4 1 In the future IEEE 1394 will be a standard port on selected PCs Chapter 4 IEEE 1394 Fundamentals and Interface Overview 61 shields signal pair wires connector _1_3_5 2 4 6 COMMENT cable power cable ground strobe on receive data on transmit data on receive strobe on transmit power wires Figure 4 4 Cross section of the IEEE 1394 Cable The power wires route power from the host adapter to devices nodes on the bus whether the devices are turned on or off Since
65. nes the E8491B can receive and assert triggers on the faceplate Trig In and Trig Out connectors Table 3 1 summarizes the triggering parameters and capabilities of the HP E8491B Table 3 1 HP E8491B Triggering Parameters Trigger Lines TTLTRG7 TTLTRGO VXI backplane Trigger Levels Trigger levels or pulses can be output on any number of TTLTRG trigger lines Trigger Routing One TTLTRG trigger line can be routed to one ECLTRG trigger line ECLTRG1 ECLTRGO VXI backplane Trigger levels or pulses can be output on any number of ECLTRG trigger lines One ECLTRG trigger line can be routed to one TTLTRG trigger line Trig In Port HP E8491B faceplate Input trigger levels are TTL ECL CMOS or programmable up to 30V Default assumes TTL low true signal Input triggers can be routed to any number of TTLTRG trigger lines and to any number of ECLTRG trigger lines Trig Out Port HP E8491B faceplate Output trigger level is 5V low true default and can be pulled One TTLTRG or ECLTRG trigger line can be routed to the Trig Out port to 30V The E8491B Trig In and Trig Out ports are configured using the HP I O Libraries I O Config utility Using Triggers The triggering functionality of the HP E8491B is accessed through the following HP VISA and SICL functions Asserting Triggers HP VISA viSetAttribute VI_ATTR_TRIG_I
66. no more than 16 hops between any two nodes In the diagram above there is a maximum of three hops between nodes The distance between any two nodes cannot exceed 72m Features of the IEEE 1394 Bus including VXI systems The following features of the IEEE 1394 bus apply to all bus applications Daisy chain or branching configurations are allowed There can be no closed loops i e more than one connection between any two devices Up to 63 devices including 16 HP E8491Bs are allowed per bus segment One host adapter represents one bus segment There is a maximum of 16 hops between any two devices The bus cable length cannot exceed 72 meters between any two devices Live hot connections A VXI mainframe anywhere in the configuration can be turned on off without affecting the other mainframes The IEEE 1394 bus automatically reconfigures itself any time a VXI mainframe or other device is added or removed It is best to do this however if there are no data transactions taking place elsewhere in the system 58 IEEE 1394 Fundamentals and Interface Overview Chapter 4 Optimizing the Configuration T O performance is impacted slightly by the hardware configuration The VXI mainframe closest to the PC root node has the highest priority For example if instruments in VXI mainframes 1 and 3 Figure 4 1 contend for the bus at the same time the root node will grant mainframe 1 access to the bus first How
67. omments and suggestions In appreciation of your time we will enter you in a quarterly drawing for a Hewlett Packard Palmtop Personal Computer U S government employees are not eligible for the drawing Your Name City State Province Company Name Country Job Title Zip Postal Code Address Telephone Number with Area Code Please list the system controller operating system programming language and plug in modules you are using fold here NECESSARY NO POSTAGE IF MAILED IN THE UNITED STATES BUSINESS REPLY MAIL FIRST CLASS PERMIT NO 37 LOVELAND CO POSTAGE WILL BE PAID BY ADDRESSEE HEWLETT PACKARD COMPANY Measurement Systems Division Learning Products Department P O Box 301 Loveland CO 80539 9984 cut along this line fold here Please pencil in one circle for each statement below Disagree lt _ gt Agree The documentation is well organized e Instructions are easy to understand The documentation is clearly written e Examples are clear and useful e llustrations are clear and helpful The documentation meets my overall expectations CO0O000 CO0O000 CO0O000 CO0O000 CO0O000 Please write any comments or suggestions below be specific Chapter 1 Introduction Using the IEEE 1394 Serial Bus in VXI Systems Component Overview The HP E8491B PC Link to VXI Interconnect The OHCI Compatible P
68. ompany All Rights Reserved Documentation History All Editions and Updates of this manual and their creation date are listed below The first Edition of the manual is Edition 1 The Edition number increments by 1 whenever the manual is revised Updates which are issued between Editions contain replacement pages to correct or add additional information to the current Edition of the manual Whenever a new Edition is created it will contain all of the Update information for the previous Edition Each new Edition or Update also includes a revised copy of this documentation history page iti Orn stesso ocean ed Aah ROAR WE he ease h June 1998 GIGI ON 2 ie e naea laces E oadl aaiota thos tenia ech och M hd June 1999 Safety Symbols Instruction manual symbol affixed to s product Indicates that the user must refer to Ny Alternating current AC the manual for specific WARNING or CAUTION information to avoid personal _ Di DC injury or damage to the product ae irect current DC Indicates hazardous voltages Indicates the field wiring terminal that must Revi Ae be connected to earth ground before operating the equipment protects against Calls attention to a procedure practice or electrical shock in case of fault condition that could cause bodily injury or death WARNING Calls attention to a procedure practice or of Frame a sane ground bear ca CAUTION condition that could possibly cause damage to CODE CL
69. ort is configured for the state normally high or normally low selected 1 Trigger routing is only available using the HP SICL ivxitrigroute function 44 VXI Programming Using the IEEE 1394 Serial Bus Chapter 3 Note The I O Config help file associated with the HP E8491B interface contains additional information on configuring the faceplate trigger ports Triggering Example The following program demonstrates how an external trigger received on the faceplate Trig In port is routed to TTL trigger lines on the VXI backplane TRIGSICL CPP This program demonstrates how trigger signals are generated and routed using the HP E8491B The program uses SICL functions to generate and route a trigger signal from the face plate Trig Out port to VXI backplane trigger line TTILTRG4 The signal triggers the 1412 multimeter which then takes a burst of 10 readings finclude sicl h include lt stdio h gt include lt stdlib h gt project files trigsicl cpp sicl32 1lib void main void INST e 8491 E8491 SICL INST e 1412 E1412 SICL short i double dcv_rdgs 10 install SICL error handler ionerror I_ERROR_EXIT open a SICL interface session to the E8491B open a SICL device session to the E1412 e8491 iopen vxi e1412 iopen vx1i 24 set up trigger routing rout a trigger from the faceplate
70. rams HP VXIplug amp play ViSession vi open device VXIplug amp play session to the HP E1563 errStatus hpel563_init VXI0 24 INSTR VI_FALSE VI_FALSE amp vi Chapter 3 VXI Programming Using the IEEE 1394 Serial Bus 35 HP VISA ViSession defaultRM id open device VISA session to the HP E1563 viOpenDefaultRM amp defaultRM viOpen defaultRM VXI0 24 INSTR VI_NULL VI_NULL amp id SICL INST id open device SICL session to the HP E1563 id iopen wxi 24 Or to open an interface session to the HP E8491B INST id open SICL session to the VXI interface id iopen vxi The HP E8491B IEEE 1394 interconnect uses the VISA interface name VXI lt n gt or SICL interface name vxi The interface number is assigned using the I O Config utility see Chapter 2 In the examples above the logical address of the HP E1563 digitizer is 24 and INSTR indicates a VISA instrument control resource Optimizing Programs that run over the IEEE 1394 serial bus are optimized by transferring data between the PC and the instrument in blocks The Prog rams following section identifies HP VISA and SICL functions that perform block transfers Note Refer to Chapter 4 IEEE 1394 Fundamentals and Interface Overview for detailed information on data transfers using the IEEE 1394 data transfer protocol Block Data Transfers VXIplug amp play drivers for se
71. rminology cccsssscssccssscssscsssssesesccessscssssscssoesees 57 Features of the IEEE 1394 Bus s ssesosesosoososesosososessonosossososososesoseososososesessess 58 Optimizing the Configuration ccccscscsscssscsscessscssscssscsssesssesssesssesssssesses 59 TEEE 1394 Data Transfer Protocol sccssccssssscssscssccssscssscsesssessscsessssessessesses 59 Asynchronous Data Transfers cccccsssssscssssssccssscssscsesssesesssesssessesssseesses 60 Fair Arbitration Protocol cccccssscssssssssccssssssssssssscssscsescnessnesesessnsssecssscsssesees 60 VXI Data Transfers sccccssscsscsssscssscssscsssssscesssscsscssscessssessnesssssssssecessosssesens 60 OHCI Compatible Host Adapter and Interface Cable ssccssssscesssecsscssesesenes 61 The HP E8491B PC to VXI Interconnect scscccssscssccssscssscssssncsssssesssssssssessesees 62 Using the HP E8491B with the HP E1406 Command Module secseee 64 The HP I O Libraries cssccsssssssssccssscssscssscssssssessssscsssscscscsssessnesssssesssesesscessesens 64 Appendix A SDECIICALIONS A 65 Interface Characteristics ccccscccscsscssscssscsssccsscsssssssssssessscesscsescsssssesssssessseeeses 65 VXI Characteristics cccccccccssccsscsscsscessscssssssssssssessssscssssesssccssccsssesssessesssscsssesses 65 General A A E 65 C e MO E ETE RE 66 External Trigger Input cccsscsssscssscssscssssssssssssssssssscessnsssescsssssssssssesssessesens 66 External
72. roduct 9 TO THE EXTENT ALLOWED BY LOCAL LAW THE REMEDIES IN THIS WARRANTY STATEMENT ARE CUSTOMER S SOLE AND EXLUSIVE REMEDIES EXCEPT AS INDICATED ABOVE IN NO EVENT WILL HP OR ITS SUPPLIERS BE LIABLE FOR LOSS OF DATA OR FOR DIRECT SPECIAL INCIDENTAL CONSEQUENTIAL INCLUDING LOST PROFIT OR DATA OR OTHER DAMAGE WHETHER BASED IN CONTRACT TORT OR OTHERWISE FOR CONSUMER TRANSACTIONS IN AUSTRALIA AND NEW ZEALAND THE WARRANTY TERMS CONTAINED IN THIS STATEMENT EXCEPT TO THE EXTENT LAWFULLY PERMITTED DO NOT EXCLUDE RESTRICT OR MODIFY AND ARE IN ADDITION TO THE MANDATORY STATUTORY RIGHTS APPLICABLE TO THE SALE OF THIS PRODUCT TO YOU U S Government Restricted Rights The Software and Documentation have been developed entirely at private expense They are delivered and licensed as commercial computer software as defined in DFARS 252 227 7013 Oct 1988 DFARS 252 211 7015 May 1991 or DFARS 252 227 7014 Jun 1995 as a commercial item as defined in FAR 2 101 a or as Restricted computer software as defined in FAR 52 227 19 Jun 1987 or any equivalent agency regulation or contract clause whichever is applicable You have only those rights provided for such Software and Documentation by the applicable FAR or DFARS clause or the HP standard software agreement for the product involved HP E8491B IEEE 1394 PC Link to VXI Configuration and User s Guide La HEWLETT PACKARD Edition 2 Copyright 1999 Hewlett Packard C
73. s are used to transfer the readings from shared memory to the PC SHAR_VISA CPP This program demonstrates how to access the HP E8491B s shared memory The program stores readings taken by the HP E1410 multimeter in HP E8491B shared memory and then transfers those readings from shared memory to the computer include hpe1l410 h include the driver header fil include visa h include lt stdio h gt include lt stdlib h gt include lt windows h gt project files SHAR_VISA cpp hpel410 lib VISA32 1lib specify the addressing path to the multimeter define E1410 VX1I0 24 INSTR E1410 path define E8491 VXI0 0 INSTR E8491 path check for instrument errors define INSTR_ERROR OxBFFCODO7 50 VXI Programming Using the IEEE 1394 Serial Bus Chapter 3 set up byte swap function for readings transferred from E8491B shared memory to the PC define SWAP_FLOAT64 rdgs unsigned char src 8 double src doubl unsigned rdgs unsigned unsigned unsigned unsigned unsigned unsigned unsigned rdgs unsign unsign dg unsign unsign unsign unsign unsign unsign FF HF e 0 1 2 3 4 5 6 7 OrFRPNWHA OOD gt I qaQaqagaagaaaa qgqaQqaqaaagaaaqana prototypes void check ViSession vi ViStatus error void err_han
74. s data traffic SYSFAIL over the IEEE 1394 bus IEEE 1394 Ports SYSFAIL asserted during a VXI instrument self test p j H VXI indicates data traffic across the mainframe s VXI backplane Trigger Ports The E8491B is capable of sourcing TTL level triggers and receiving TTL CMOS ECL or user specified levels up to 30V Trigger signals can be generated internally and distributed over the VXI backplane and to external de vices or the triggers can be distrib uted from an external source Configuration Label Used to identify the interconnect address in multi frame VXI systems Reset HP E8491B IEEE 1394 Ports Three ports allow tree topologies which minimize the number of hops Each port is identical and any port or combination of ports can be used System Clock Ports The E8491B is capable of sourcing and receiving the VXI system s 10 MHz clock The system clock CLK10 is one of the VXI resources provided by the mainframe s slot 0 device This TTL level clock is internally generated or can be received from an external source The signal is distributed to every slot in the mainframe and can also be routed to external devices Reset Button Resets the HP E8491B and all instruments in the mainframe Re runs the resource manager Figure 4 5 The HP E8491B IEEE 1394 to VXI Interconnect IEEE 1394 Fundamentals and Interface Overview 63 Using the HP E8491B with the HP E1406
75. sssscessnscssscsssssesssscesessssesens 36 Block Transfers using HP VXIplug amp play Drivers cccsssssccssscssscssesesenes 37 Block Transfers using HP VISA s csccsssssscssscsssscssscsssnsssssscsssssssssessssessesens 40 HP E8491B Triggering sccssccsscssccssccssscssscssssssesssssccssscscsscsesssessssssssscsesseessesens 43 Using Triggers ccccccsssccsscsscsssccssscsscssscsssssssssssssssssscsscsesssesssssesssssesscessesens 43 Configuring the E8491B Trig In and Trig Out Ports csecssecsssssessseessees 44 Triggering Example ccccccssccscssssssscssscssscsssssssssssesssessscssscsescscsssesesssesssecsses 45 Trigger Pull Up ccsscssscsscsscesscessssssccssnsssnssssssesssssssscssscccssessssssecssscessesses 47 Using HP E8491B Shared Memory ccccccsssccsscssscssessssessccssscecssessscssecssesssecsses 47 Locating E8491B Shared Memory scccsssscssccssscssscsssssecesecessssssssesseesses 47 Example Programs cccccccossssssscssscssscsssssssssssesssccsscecssesssnecsnssesssesessscssscssesssessneees 49 Storing Readings in Shared Memory HP VISA Example scssssssssssenes 50 Storing Readings in Shared Memory SICL Example ccsccssscssesssessseeee 54 Chapter 4 IEEE 1394 Fundamentals and Interface Overview ssscssessssessesssesessssssesseesees 57 Using this Chapter ccssscssscssscssssssssnsccssccssssccssscsssscesssnssenssesesscssncsssssesssoesssossoosees 57 TEEE 1394 Topology and Te
76. te For HP E8491 Controllers to work the HP I O Libraries Control must be running Executing Exit will disable HP E8491B operation About HP I O Libraries Control Provides the HP I O Libraries Control version number Step 5 Installing There are no SCPI instrument drivers installed in or downloaded to the HP E8491B While this does not impact message based instruments HP VXIp lug amp p lay register based instruments in IEEE 1394 based systems are usually Instrument Drivers programmed using their VXIplug amp play drivers The HP VXIplug amp play drivers are located on the HP Universal Instrument Drivers CD which ships with the E8491B and with each VXI instrument The installer program on the driver CD is similar to that on the I O libraries CD Once the drivers have been installed reboot the PC Note If you are updating an existing VXI system to use the HP E8491B and IEEE 1394 serial bus we highly recommend that you obtain the latest version of the HP VXIplug amp play drivers Information on the latest drivers available can be found on the World Wide Web at http www hp com go inst_drivers 28 Interface Installation and Configuration Chapter 2 Step 6 Verifying the Once you have installed the hardware the I O Libraries the VXIplug amp play Installation drivers and have re booted the PC you should now verify the installation This ensures that you can communicate with instruments in the system over the IEEE 1394 in
77. ter 2 Host Adapter Power In From System Power Supply 12V DC Power Connector Power Out To Disk Drives Figure 2 5 Connecting the Power Cable Between the PC and the Host Adapter 7 Replace the computer cover Connect one end of the interface cable to either adapter external connector Where to go Next e If you are installing the IEEE 1394 interface for the first time Continue with Step 2 Installing the HP E8491B Interconnect If the E8491B and your VXI instruments are already installed Proceed to Step 4 Installing the HP I O Libraries Note that the HP I O Libraries contain the OHCI compatible host adapter drivers Note Refer to Chapter 4 IEEE 1394 Fundamentals and Interface Overview for more information on the OHCI compatible PCI to IEEE 1394 host adapter Step 2 Installing The HP E8491B interconnect links the IEEE 1394 bus to the backplane of the VXI mainframe The HP E8491B is a C size device with VXI Resource the HP E8491B Manager and Slot 0 capability Interconnect There are no configuration switches on the HP E8491B The device s logical address is 0 and it provides the system s resource manager functionality via software that is part of the HP I O Libraries Its VXI servant area is 255 therefore it is the interface to all VXI devices with logical addresses between 1 and 255 The HP E8491B is normally but not required to be installed in mainframe slot 0 Note Refer
78. terface Two ways to check your system are to run an instrument s soft front panel or to view the output of the system s resource manager Using Instrument Soft Soft front panels are part of the instruments VXIplug amp play drivers A soft Front Panels front panel is activated from the Vxipnp program group as shown in Figure 2 14 HP E1563 2 Chan Digitizer 32 bit SFP 4 HP E1563 Help 32 bit 4 HP E2260 Help 32 bit HP E2260 Serial Parallel 32 bit SFP Click to activate a soft a Y HP E2261 Help 32 bit DU gt front panel i DA HP E2261 Serial M Mod 32 bit SFP EA HP E2270 Form Switch 32 bit SFF 4 HP E2270 Help 32 bit DA HP E2271 4x4 Matrix 32 bit SFP G HP E2271 Help 32 bit G HP E2272 Help 32 bit EA HP E2272 Multiplexer 32 bit SFP EA HP E2290 Digital IO 32 bit SFP fS Vxipnp gt HP E2290 Help 32 bit EI HP E8460 256 Chan Mux 32 bit SFP G HP E8460 Helo 32 bit Figure 2 14 Selecting a VXIplug amp play Soft Front Panel When the system hardware and software are properly installed and the PC is communicating with the mainframe the soft front panel will be opened and a connection made to the instrument as shown in Figure 2 15 Chapter 2 Interface Installation and Configuration 29 E HP E1563 2 Channel Digitizer System Help ae WXIO 64 Slot 4 Active Sample Count fi Sample Period fi Sus m Display Channels Range g Ch 1 256v gy 256
79. the installer does not activate select Start Run and type lt drive gt SETUP EXE where lt drive gt designates the CD drive Do not apply power to the VXI mainframe 2 Review the information and license agreements presented at the beginning of the installation process 3 Continue through the installation process as directed by the installer Be sure to indicate that you want HP I O Libraries support for the E8491B interface installed by clicking on the box next to Install HP E8491 VXI Components 4 Read the Readme txt file if you choose then select Do not configure the interfaces at this time in the next window 5 After the installation is complete re start the computer Configuring the 1 Connect the IEEE 1394 interface cable between the host adapter PC HP E8491B Interconnect and one of the IEEE 1394 ports on the E8491B front panel 2 Turn on the VXI mainframe 3 From the HP I O Libraries program group created when the libraries were installed Start gt gt Programs gt gt HP I_O Libraries click on I_O Config Figure 2 10 24 Interface Installation and Configuration Chapter 2 Chapter 2 7 1_0 Readme F SCPI Readme LAN Server SICL Help ME VISA Assistant F VISA Assistant Help Figure 2 10 The HP I O Libraries Program Group An alternative is to click on the HP icon in the lower right hand corner of your monitor which is placed there following the installation of the I O Li
80. ting address of shared memory double rdgs 8000 array for readings from shared memory short i unsigned long map memory map space 54 VXI Programming Using the IEEE 1394 Serial Bus Chapter 3 install SICL error handler ionerror I_ERROR_EXIT open a SICL interface session to the E8491B open a SICL device session to the E1410 e8491 iopen vxi e1410 iopen vx1i 24 read the VXI resource manager information in order to determine the E8491B shared memory starting address ivxirminfo e8491 0 amp info start_addr info memstart convert address from pages to an address start_addr start_addr 256 map E8491B memory space for transfer of readings from E8491B shared memory to the computer map imapx e8491 I_MAP_ SHARED 0 1 set a 5s timeout period to allow functions to complete itimeout e8491 5000 itimeout e1410 5000 configure the multimeter for DCV measurements iprintf e1410 CONF VOLT DC 30 0 n set a 10 us aperture time iprintf e1410 VOLT APER 10 0e 6 n set 8000 readings iprintf e1410 SAMP COUN 8000 n store the readings in HP E8491B shared memory specify the E8491B shared memory base address iprintf e1410 MEM VME ADDR d n start_addr specify the amount of memory required 8000 readings 8 bytes reading iprintf e1410 MEM VME SIZE 64000 n
81. to Alternate Configurations on page 19 for information on using the HP E8491B with the HP E1406 Command Module and using it in VXI MXI systems Chapter 2 Interface Installation and Configuration 17 1 If power is applied to the VXI mainframe remove power to the VXI mainframe and disconnect all power sources that may be applied to any instruments 2 Insert the E8491B into mainframe slot 0 by aligning the module with the guides inside the mainframe Figure 2 6 Slowly push the module into the slot until it seats in the backplane connectors It may be necessary to pull out not remove the retaining screws in order to seat the device securely in the connectors Retaining Screws Seat the module by pushing in the extraction levers Extraction Levers Slide the module into the mainframe until it plugs into the backplane connectors Figure 2 6 Installing the HP E8491B in the VXI Mainframe 3 Tighten the retaining screws on the top and bottom of the module Connecting the HP E8491B to the Host Adapter 4 Connect the interface cable from the host adapter to E8491B port A B or C The ports are identical and unused ports are available to connect additional E8491Bs and other IEEE 1394 devices in a daisy chain or tree configuration Figure 2 7 Notice that there can 18 Interface Installation and Configuration Chapter 2 be no closed loops DAISY CHAIN CONFIGURATION TREE CONFIGURATION P
82. trument All instruments within the VXI mainframe are grounded through the mainframe chassis During installation tighten the instruments retaining screws to secure the instrument to the mainframe and to make the ground connection Interface Installation and Configuration Chapter 2 e Unt Backplane m a Mainfrc 7 bs Cc he VXI Instruments ize S and B ing A Install 9 2 igure F 23 Interface Installation and Configuration Chapter 2 Step 4 Installing The HP I O Libraries CD contains the software required to use the IEEE the HP I O Libraries 1394 interface in a VXI system It also includes the OHCI compatible host adapter drivers Note Refer to Chapter 4 IEEE 1394 Fundamentals and Interface Overview for more information on the HP I O Libraries and related software Note If your PC indicates that new hardware has been found after applying power do the following a Select Driver from disk provided by hardware manufacturer Press OK b Insert the I O Libraries CD in your CD ROM drive c Point or browse to the drive letter for the CD ROM Press OK d You will be instructed to install the driver that matches the hardware Begin by performing the following steps 1 Apply power to your PC Close all open applications and insert the T O Libraries CD into your PC CD ROM drive Inserting the CD automatically activates the installer If
83. ugh HP VISA and HP SICL functions Although this manual identifies the specific functions used you will need to refer to the HP VISA and HP SICL manuals for detailed information Also included with the HP I O Libraries is the utility I_O Config This utility is used to configure the HP E8491B and has a help file associated with it Pop up or pull down menus displayed by the HP I O Libraries software will show I O Libraries as I_O Libraries and I O Config as I_O Config because the cannot be displayed The character is therefore replaced by the underscore character Chapter 1 Chapter 2 Interface Installation and Configuration Using this Chapter This chapter contains information necessary to install and configure the IEEE 1394 host adapter if required and the HP E8491B interconnect The installation sequence and other topics covered in this chapter are as follows Step 1 Installing the IEEE 1394 Host Adapter 13 Step 2 Installing the HP E8491B Interconnect 17 Step 3 Installing VXI Instruments 20 Step 4 Installing the HP I O Libraries 24 Step 5 Installing HP VXIplug amp play Instrument Drivers 28 Step6 Verifying the Installation 29 Running the Resource Manager 0 33 Step q1 Installing The IEEE 1394 adapter shipped as Option 001 to the HP E8491B is an OHCI compatib
84. utine void check ViSession vi ViStatus errStatus VilInt32 inst_err ViChar err_message 256 1f VI_SUCCESS gt errStatus if INSTR_ERROR errStatus query instrument error hpel410_dcl vi send a device clear hpel410_error_query vi amp inst_err rr_message display the error printf Instrument Error ld else get driver error message hpel1410_error_message vi errStatus err_message s n inst_err err_message display the error printf HP E1410 Driver Error hpel410_reset vi reset the multimeter 10_close vi close the multimeter handle sld s n errStatus err_message hpel exit 1 return J BRK RK KK KK KK KK I I II I Kk Kk Kk Kk kk I I I I KK Error handling function void err_handler ViSession vi ViStatus err char buf 1024 0 viStatusDesc vi err buf printf ERROR s n buf return Chapter 3 VXI Programming Using the IEEE 1394 Serial Bus 53 Comments 1 Because of the E1410 multimeter data storage format eight bytes reading the readings are transferred from shared memory to the PC in bytes Therefore it is necessary to swap each byte in order to re construct the reading Depending on the storage formats of your particular instruments swapping may not be necessary 2 This manual is included on the HP I O Libraries CD By viewing the manual

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