HP 9112 manual E r a t i o n T h e o r e m, A/D Conversion, Analog Input Signal Connection

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O p e r a t i o n T h e o r e m

The operation theorem of the functions on PCI-9112 card is described in this chapter. The functions include the A/D conversion, D/A conversion, Digital I/O and counter / timer. The operation theorem can help you to understand how to manipulate or to program the PCI-9112.

4.1A/D Conversion

Before programming the PCI-9112 to perform the A/D conversion, you should understand the following issues:

ØA/D front-end signal input connection

ØA/D conversion procedure

ØA/D trigger mode

ØA/D data transfer mode

ØSignal Connection

4.2Analog Input Signal Connection

The PCI-9112 provides 16 single-ended or 8 differential analog input channels. The analog signal can be converted to digital value by the A/D converter. To avoid ground loops and get more accuracy measurement of A/D conversion, it is quite important to understand the signal source type and how to choose the analog input modes : signal -ended and differential. The PCI-9112 offers jumpers to select 16 single-ended or 8 different analog inputs.

28 ∙ Operation Theorem

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Contents Page ALL Rights Reserved TrademarksAdlink Technology Inc Detailed Company InformationQuestions Page Contents Conversion Conversion Digital Input and Output9112DO 9112DA 9112ADSetChannel 9112ADSetRange 9112DblBufferTransfer 9112GetOverrunStatusAppendix A. Demo. Programs Product Warranty/Service What do you need VR Assignment AdjustmentSoftware Utilities PCI Scan UtilityHow to Use This Guide Features T r o d u c t i o nIntroduction ∙ Specifications ApplicationsAnalog Input A/D Analog Output D/AGeneral Specifications Digital I/O DIOProgrammable Counter Software Supporting Programming LibraryPCIS-LVIEW LabVIEW Driver PCIS-VEE HP-VEE Driver DAQBenchTM ActiveX ControlsDASYLabTM PRO PCIS-DDE DDE Server and InTouchTMInstallation ∙ InstallationWhat You Have Device Installation for Windows Systems Installation ∙Unpacking PCB Layout PCI-9112 LayoutConverter PCI -Bus ControllerCPCI-9112 Layout PCB Layout of the PCI-9112Jumper Settings Analog Input Channel Configuration10 ∙ Installation Clock Source Setting D/A Reference Voltage SettingInternal Reference Voltage Setting 12 ∙ InstallationConnectors Pin Assignments CN 3 Analog Input / Output & Counter/TimerPin Assignments of PCI-9112 CN 1 Digital Signal Input DI 0 CN 2 Digital Signal Output do 014 ∙ Installation Pin Assignments of cPCI-9112 Hardware Installation Outline 16 ∙ InstallationDaughter Board Connection Connect with ACLD-8125Connect with ACLD-9137 Connect with ACLD-918218 ∙ Installation Connect with ACLD-9185Connect with ACLD-9138 and ACLD-9188 G i s t e r s F o r m a t I/O Registers MapRegisters Format ∙ A/D Data Registers 20 ∙ Registers FormatD/A Output Register A/D control Register Mode22 ∙ Registers Format Auto-Scan Bit MUX Register Bit8 ~ Bit524 ∙ Registers Format A/D Status Register Software Trigger RegisterDigital I/O register 26 ∙ Registers FormatInternal Timer/Counter Register High Level ProgrammingLow Level Programming Analog Input Signal Connection E r a t i o n T h e o r e mA/D Conversion 28 ∙ Operation TheoremSingle-ended Mode Differential input modeOperation Theorem ∙ 4 Floating source and differential input 30 ∙ Operation Theorem1 A/D Conversion Procedure Timer Pacer Trigger2 A/D Trigger Modes Software trigger3 A/D Data Transfer Modes External TriggerSoftware Data Transfer Drdy Interrupt Transfer IntxD/A Conversion DMA Transfer DmaxDigital Input and Output 34 ∙ Operation TheoremTimer/Counter Operation CounterGeneral Purpose Timer/ Counter Pacer Trigger SourceAddress 36 ∙ Operation TheoremControl Byte Mode Definitions 38 ∙ Operation TheoremLibraries Installation + + L i b r a r y++ Library ∙ Programming Guide Naming ConventionData Types 40 ∙ C/C++ Library9112Initial SyntaxArgument Return Code9112DI 9112DI ChannelDescription 42 ∙ C/C++ Library9112DO 9112DA 44 ∙ C/C++ Library9112ADSetChannel 9112ADSetRange 46 ∙ C/C++ Library10 9112ADSetMode Cardnumber the card number of PCI-911211 9112ADSetAutoscan 48 ∙ C/C++ Library12 9112ADSoftTrig 13 9112ADAquire 50 ∙ C/C++ Library14 9112ADDMAStart 52 ∙ C/C++ Library 15 9112ADDMAStatus 16 9112ADDMAStop 54 ∙ C/C++ Library17 9112ContDmaStart 18 9112CheckHalfReady 56 ∙ C/C++ Library19 9112DblBufferTransfer 20 9112GetOverrunStatus21 9112ContDmaStop 58 ∙ C/C++ Library22 9112ADINTStart 23 9112ADINTStatus 60 ∙ C/C++ Library25 9112ADTimer 24 9112ADINTStop2MHz / c1 * c2 62 ∙ C/C++ Library26 9112TIMERStart 27 9112TIMERRead28 9112TIMERStop 29 9112AllocDMAMemArgument cardnumber countervalue 64 ∙ C/C++ Library30 9112FreeDMAMem 32 9112GetSample66 ∙ C/C++ Library Calibration What do you needCalibration ∙ A/D Adjustment VR AssignmentBipolar Calibration Unipolar CalibrationD/A Adjustment Reference Voltage Calibration2 D/A Channel Calibration Software Utilities Software Utility70 ∙ Software Utility System Configuration Running the UtilityCalibration Software Utility ∙Functional Testing PCI Scan Utility72 ∙ Software Utility P e n d i x a . D e m o O g r a m s DOS SoftwareWindows 95 DLL Appendix a Demo Programs ∙74 ∙ Appendix a Demo Programs Product Warranty/Service Product Warranty/Service ∙