HP NuDAQ I-9111DG/HR manual 1 A/D Conversion Procedure, 2 A/D Signal Source Control

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4.1.1A/D Conversion Procedure

For using the A/D converter, users must know about the property of the signal to be measured at first. The users can decide which channels to be used and connect the signals to the PCI-9111. Refer to section 2.7 ‘Connectors Pin Assignment’. In addition, users should define and control the A/D signal sources, including the A/D channel, A/D gain, and A/D signal types. Please refer to section 4.1.2. For A/D signal source control.

After deciding the A/D signal source, the user must decide how to trigger the A/D conversion and define/control the trigger source. The A/D converter will start to convert the signal to a digital value when a trigger signal is rising. Refer to the section 4.1.3 for the three trigger modes.

The A/D data should be transferred into PC's memory for further using or processing. The data can be either read by I/O instruction which is handled directly by software or transferred to memory via interrupt.

Please refer to section 4.1.4 to obtain ideas about the multi -configurations for A/D data transferring.

Some applications need to grab the data only before or after special hardware event. The Pre-Trigger is useful to stop the A/D operation. Refer to section 4.1.5 for operation of pre-trigger mode.

To process A/D data, programmer should know about the A/D data format. Refer to section 4.1.6 for details.

4.1.2A/D Signal Source Control

To control the A/D signal source, the signal type, signal channel and signal range should be considered.

Signal Type & Signal Conditioning

The A/D signal sources of PCI-9111 could be single ended (SE) only. Three are 16 SE A/D channels on board. The R/C filters (attenuators) are on board for every channel. The RC circuit for each channel is shown in the following diagram, where ‘n’ is the channel number. User can install the R, C for special purpose such as attenuating the voltage to increase the input voltage range.

Analog Input		RA n	To Multiplexer
Analog Input		0 Ohm	To Multiplexer
Channel #n

RB n

OPEN

CA n

OPEN

Operation Theorem ∙23

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Contents NuDAQ Trademarks Questions Getting service from AdlinkPage Features Applications Specifications Software Supporting B l e o f C o n t e n t sPCI PnP Registers Address Map Hardware Interrupt Clear Register Libraries Installation Programming GuideConversion Interrupt ControlTable of Contents ∙ 9111util What do you need VR Assignment AdjustmentHow to Use This Guide Page Introduction FeaturesApplications SpecificationsUnipolar 0~10V Bipolar -10V~+10V Programming Library Software SupportingPCIS-VEE HP-VEE Driver PCIS-LVIEW LabVIEW DriverDAQBenchTM ActiveX Controls DASYLabTM PROPCIS-OPC OPC Server PCIS-ICL InControlTM Driver∙ Software Installation Guide InstallationWhat You Have UnpackingPCB Layout of the PCI-9111 PCI-9111s LayoutJumper Descriptions Hardware Installation OutlineDevice Installation for Windows Systems Connectors Pin Assignment∙ CN 1 Digital Signal Input DI 0 ~ ∙ CN 3 Analog Input/Output, Extended I/O, Trigger Signals ∙ CN 2 Digital Signal Output do 0 ~Connect with ACLD-8125 Daughter Board ConnectionConnect with ACLD-9137 Connect with ACLD-9182PCI PnP Registers Registers FormatA/D Data Registers I/O Address MapAddress Write Read I/O AddressAddress Base + 0h Attribute read only Data Format A/D Channel Control RegisterBit Address Base + 6h Attribute write only Data Format BitA/D Channel Read Back Register A/D Input Signal Range Control RegisterAddress Base + 6h Attribute read only Data Format Bit Address Base + 8h Attribute write only Data Format BitA/D Range and Status Read back Register A/D Trigger Mode Control RegisterAddress Base + 8h Attribute read only Data Format Bit Address Base + 0Ah Attribute write only Data Format BitMode Description Address Base + 0Eh Attribute write only Data Format BitAddress Base + 0Ch Attribute write only Data Format Bit Hardware Interrupt Clear Register 12 A/D Mode & Interrupt Control Read Back RegisterAddress Base + 48h Attribute write only Data Format Bit Address Base + 0Ah Attribute read only Data Format BitAddress Base + 4h Attribute write only Data Format Bit Address Base + 4h Attribute read only Data Format BitAddress Base + 2h Attribute read only Data Format 15 D/A Output Register Address Base + 2h Attribute write only Data Format BitAddress Base + 40h ~ Base + 46h A/D Conversion Operation Theorem2 A/D Signal Source Control 1 A/D Conversion ProcedureAnalog Input Signal Connection 3 A/D Trigger Source Control Signal RangeExternal Trigger EITS=1, TPST=don‘t care 4 A/D Data Transfer ModesFifo Half-Full Polling EOC Interrupt Transfer Pre-Trigger ControlTime FFF 6 A/D Data FormatIRQ Level Setting Interrupt Control System ArchitectureDual Interrupt System Extended Digital I/O Port Interrupt Source Control44mV 88mV D/A ConversionDigital Input and Output Timer/Counter Operation IntroductionPacer Trigger Source Pre-Trigger Counter4 I/O Address ++ Library Libraries InstallationData Types Programming Guide Naming Convention9111DO 9111Initial++ DOS ++ Windows9111DI 9111DOChannel9111EDI 9111DIChannel10 9111EDOReadBack 9111EDO11 9111SetEDOFunction 13 9111ADReadData 12 9111DA15 9111ADSetChannel 14 9111ADReadDataRepeat16 9111ADGetChannel Input Range Gain Gain Code 17 9111ADSetRange19 9111ADGetStatus 18 9111ADGetRange20 9111ADSetMode 22 9111INTSetReg 21 9111ADGetMode23 9111INTGetReg 24 9111ResetFIFO26 9111Set8254 25 9111ADSoftTrigger27 9111Get8254 28 9111ADTimer30 9111CounterRead 29 9111CounterStart31 9111CounterStop 32 9111INTSourceControl 34 9111GetIRQChannel 33 9111CLRIRQ36 9111ADFFHFPolling 35 9111GetIRQStatus38 9111ADHRAquire 37 9111ADAquire39 9111ADINTStart 40 9111ADFFHFINTStart ++ Library ∙61 42 9111ADFFHFINTStatus 41 9111ADINTStatus43 9111ADFFHFINTRestart 44 9111ADINTStop What do you need CalibrationA/D Adjustment VR AssignmentFunctions of VRs Bipolar Analog Output D/A Adjustment Unipolar Analog OutputSoftware Utility 9111utilRunning 9111util.exe System Configuration Calibration Function Testing Menu Window Functional TestingIeeprom Product Warranty/Service