Tektronix Using Keithley DriverLINX with KPCMCIA Analog Output Boards (1.8MB) User manual
Keithley KPCMCIA-8AO Series
Using DriverLINX with Your
Hardware
Information in this document is subject to change without notice. The software
described is this document is furnished under a license agreement. The software may
be used or copied only in accordance with the terms of the agreement.
SCIENTIFIC SOFTWARE TOOLS, INC. SHALL NOT BE LIABLE FOR ANY
SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES RELATED TO
THE USE OF THIS PRODUCT. THIS PRODUCT IS NOT DESIGNED WITH
COMPONENTS OF A LEVEL OF RELIABILITY SUITABLE FOR USE IN LIFE
SUPPORT OR CRITICAL APPLICATIONS.
This document may not, in whole or in part, be copied, photocopied, reproduced,
translated or reduced to any electronic medium or machine readable form without
prior written consent from Scientific Software Tools, Inc.
Keithley KPCMCIA-8AO Series: Using DriverLINX with your Hardware
Copyright 1998, 2001, Scientific Software Tools, Inc.
All rights reserved.
SST 14-0801-1
DriverLINX, SSTNET, and LabOBJX are registered trademarks and
DriverLINX/VB is a trademark of Scientific Software Tools, Inc.
MetraByte and KPCMCIA are trademarks of Keithley Instruments, Inc.
Microsoft and Windows are registered trademarks and Visual C++ and Visual Basic
are trademarks of Microsoft Corporation.
Borland is a registered trademark and Borland C++ and Delphi are trademarks of
Borland International, Inc.
All other brand and product names are trademarks or registered trademarks of their
respective companies.
2
Contents
Preface 5
Software License and Software Disclaimer of Warranty............................................................5
About DriverLINX.....................................................................................................................7
About This User’s Guide...........................................................................................................7
Conventions Used in This Manual.............................................................................................8
Configuring the KPCMCIA-8AO Series 9
Introduction................................................................................................................................9
Configure DriverLINX Device Dialog.......................................................................................9
Using the KPCMCIA-8AO Series with DriverLINX 23
Introduction..............................................................................................................................23
DriverLINX Hardware Model for KPCMCIA-8AO Series .....................................................23
Connecting Signals to the KPCMCIA-8AO Series.................................................................. 28
Device Subsystem....................................................................................................................30
Analog Output Subsystem........................................................................................................31
Digital Input Subsystem...........................................................................................................43
Device Subsystem Page.............................................................................................11
Analog Output Subsystem Page.................................................................................13
Digital Input Subsystem Page....................................................................................15
Digital Output Subsystem Page .................................................................................19
Counter/Timer Subsystem Page.................................................................................21
DriverLINX Subsystems............................................................................................23
DriverLINX Modes ...................................................................................................24
DriverLINX Operations and Events..........................................................................25
Logical Channels.......................................................................................................27
Buffers.......................................................................................................................27
Analog Output Subsystem Signals.............................................................................28
Digital Input Subsystem Signals................................................................................28
Digital Output Subsystem Signals..............................................................................28
Counter/Timer Subsystem Signals.............................................................................29
Device Modes............................................................................................................30
Device Operations .....................................................................................................30
Analog Output Modes................................................................................................31
Analog Output Operations.........................................................................................31
Analog Output Timing Events...................................................................................31
Analog Output Start Events .......................................................................................34
Analog Output Stop Events........................................................................................36
Analog Output Channels............................................................................................37
Analog Output Buffers...............................................................................................40
Analog Output Data Coding ......................................................................................41
Analog Output Messages...........................................................................................41
Keithley KPCMCIA-8AO Series Contents • 3
Digital Input Modes...................................................................................................43
Digital Input Operations.............................................................................................43
Digital Input Timing Events.......................................................................................43
Digital Input Start Events...........................................................................................46
Digital Input Stop Events...........................................................................................48
Digital Input Channels...............................................................................................49
Digital Input Buffers..................................................................................................52
Digital Input Messages...............................................................................................52
Digital Output Subsystem.........................................................................................................54
Digital Output Modes ................................................................................................54
Digital Output Operations..........................................................................................54
Digital Output Timing Events....................................................................................54
Digital Output Start Events........................................................................................57
Digital Output Stop Events........................................................................................59
Digital Output Channels.............................................................................................60
Digital Output Buffers...............................................................................................63
Digital Output Messages............................................................................................63
Counter/Timer Subsystem........................................................................................................65
Uninstalling DriverLINX 67
How do I uninstall DriverLINX? .............................................................................................67
Troubleshooting 72
Solving Problems.....................................................................................................................72
Solving Problems Installing Drivers..........................................................................72
Solving Problems Configuring the Drivers................................................................72
Solving Problems Loading Drivers............................................................................73
Generating a DriverLINX Configuration Report......................................................................76
What is in the Report?................................................................................................76
How do I Generate the Report?..................................................................................76
Glossary of Terms 77
4 • Contents Keithley KPCMCIA-8AO Series
Preface
Software License and Software Disclaimer of Warranty
This is a legal document whic h is an agreement between you, the Licensee, and Scientific Software Tools, Inc. By opening this
sealed diskette package, Licensee agrees to bec ome bound by the terms of this Agreement, which include the S oftware License and
Software Disclaimer of Warranty.
This Agreement constit utes the complete Agreement between Licensee and Scient ific Software Tools, Inc. If Licensee does not
agree to the terms of this Agreement, do not open the dis kette package. Promptly return the unopened diskette package and the other
items (including written materials , binders or other containers, and hardware, if any) that are part of this product to S cientific Software
Tools, Inc. for a full refund. No ref unds will be given for products that have opened disk packages or missing components.
Licensing Agreement
Copyright. The software and doc umentation is owned by Scient ific Software Tools, Inc. and is prot ected by both United States
copyright laws and int ernational treaty provisions. Scient ific Software Tools, Inc. authoriz es the original purchaser only (Licensee) to
either (a) make one copy of t he software solely for backup or archival purposes, or (b) transf er the software to a si ngle hard disk only.
The written materials acc om panying the software may not be duplicated or copied for any reason.
Trade Secret. Licensee understands and agrees that the sof tware is the propriet ary and confident ial property of Scientifi c Software
Tools, Inc. and a valuable t rade secret. Li censee agrees to us e the software only for the intended us e under this License, and shall not
disclose the soft ware or i t s contents to any third part y.
Copy Restrictions. The Licensee may not modify or trans late the program or related documentation without the prior written
consent of Scientific Software Tools, Inc. All modifications, adapt ations, and me rged portions of the s oftware const itute the s oftware
licensed to t he Licensee, and the terms and conditions of this agreement apply to same. Licens ee may not distribut e copies, inc luding
electronic transfer of c opies, of the modif ied, adapted or m erged software or ac company ing written m aterials to others. Licensee agrees
not to reverse engineer, decompil e or di sassemble any part of the s of tware.
Unauthorized copying of the soft ware, including sof tware that has been m odified, merged, or i ncluded with other s oftware, or of t he
written materials is ex pressly forbidden. Licens ee may not rent, transfer or leas e the software to any third parties. Licens ee agrees to
take all reasonable steps to protect Scientific Software Tools’ software from theft, disclosure or use contrary to the terms of the Licens e.
License. Scientific S oftware Tools, I nc. grants t he Licensee only a non-exclusiv e right to use the serialized copy of the software on
a single terminal connected t o a single computer. The Licens ee may not network the s oftware or use it on more t han one computer or
computer terminal at the s ame time.
Term. This Lic ense is effective until terminated. This License will terminate automatic ally without notice from Scientific Software
Tools, Inc. if Lic ensee fail s to com ply wit h any term or c ondition of this Licens e. The Licensee agrees upon such termination to ret urn or
destroy the written materi als and all copies of t he software. The Licensee may terminate the agreement by ret urning or destroying the
program and documentation and all copies thereof.
Keithley KPCMCIA-8AO Series Preface • 5
Limited Warranty
Scientific Software Tools, I nc. warrants that the software will perform subs tantially in acc ordance with the written mat erials and that
the program disk, instructi onal manuals and reference mat erials are free from defec ts in materials and workmanship under normal us e
for 90 days from the date of receipt. All express or im pl i ed warranties of the software and related materials are limited to 90 days.
Except as specif icall y set f orth herein, t he soft ware and accompany ing writt en materials (includi ng instruc tions f or use) are provided
“as is” without warranty of any kind. Further, Sc ientific Soft ware Tools, Inc. does not warrant , guarantee, or make any represe ntations
regarding the use, or the results of t he use, of the s of tware or writ ten mat erial s in terms of correct ness , acc uracy , reliabil ity, currentness,
or otherwise. The entire risk as to the results and perform ance of the software is as sumed by Licensee and not by Scienti fic Software
Tools, Inc. or its distributors, agents or employees.
EXCEPT AS SET F ORTH HE REI N, THE RE ARE NO OTHER WARRANT IE S, EI THER EXPRESS OR IMPLIED, INCLUDING BUT
NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, WITH
RESPECT TO THE SOFTWARE, THE ACCOMPANYING WRITTEN MATERIALS, AND ANY ACCOMP ANYING HARDWARE.
Remedy. Scientific S oftware Tools’ ent ire liabilit y and the Licens ee’s ex clus ive remedy shall be, at Sc ientific Sof tware Tools’ opt ion,
either (a) return of the price paid or (b) repair or replac ement of the software or accompanying m aterials. In the event of a defect in
material or workmans hip, the item may be returned wit hin the warranty period to Scientific S oftware Tools for a replacement without
charge, provided the licensee previously s ent in the limited warranty regis tration card to Scientif ic Software Tools, Inc ., or can furnish
proof of the purchase of the program. This remedy is void if failure has resulted from accident, abuse, or misapplication. Any
replacement will be warranted for the remainder of the original warranty period.
NEITHER SCIENTIFIC SOFTWARE TOOLS, INC. NOR ANYONE ELSE WHO HAS BEEN INVOLVED IN THE CREATION,
PRODUCTION, SALE OR DELI VERY OF THIS PRODUCT S HALL BE LIABLE FOR ANY DIRE CT, INDIRECT, CONSEQUENTI AL,
OR INCIDENTAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF BUSINESS PROFITS, BUSINESS INTERRUPTION, LOSS OF
BUSINESS INFORMATION AND THE LIKE) ARISING OUT OF T HE USE OF OR THE INABI LITY TO USE SUCH PRODUCT EVEN
IF SCIENTIFIC SOFTWARE TOOLS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. BECAUSE SOME
JURISDICTIONS DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL
DAMAGES, OR LIMITATI ONS ON DURATION OF AN IMPLIED WARRANTY, THE ABOVE LIM ITATIONS MAY NOT APPLY TO
LICENSEE.
This agreement is governed by the laws of the Commonwealth of Pennsylvania.
6 • Preface Keithley KPCMCIA-8AO Series
About DriverLINX
Welcome to DriverLINX for Microsoft Windows, the high-performance realtime data-acquisition device drivers for Windows application development.
DriverLINX is a language- and hardware-independent appli cation-programming
interface designed to support hardware manufacturers’ high-speed analog, digital,
and counter/timer data-acquisition boards in Windows. DriverLINX is a multi-user
and multitasking data-acquisition resource manager providing more than 100 services
for foreground and background data acquisition tasks.
Included with your DriverLINX package are the following items:
• The DriverLINX API DLLs and drivers supporting your data-
acquisition hardware
• Learn DriverLINX, an interactive learning and demonstration program
for DriverLINX that includes a Digital Storage Oscilloscope
• Source code for the sample programs
• The DriverLINX Application Programming Interface files for your
compiler
• DriverLINX On-line Help System
• DriverLINX Analog I/O Programming Guide
• DriverLINX Technical Reference Manual
• Supplemental Documentation on DriverLINX and your data acquisition
hardware
About This User’s Guide
The purpose of this manual is to help you quickly learn how to configure and use t he
hardware features of Keithley’s KPCMCIA-8AO Series cards with DriverLINX.
• For more information on the DriverLINX API, please see the
DriverLINX Technical Reference Manual.
• For additional help programming your board, please examine the source
code examples on the Distribution Disks.
This manual contains the following chapters:
Configuring the KPCMCIA-8AO Series
Shows how to configure the KP CMCIA-8AO Series using the Configure DriverLINX
Device dialog box.
Using the KPCMCIA-8AO Series with DriverLINX
Shows how to set up DriverLINX with the Edit Service Request dialog box to use
KPCMCIA-8AO Series hardware features.
Keithley KPCMCIA-8AO Series Preface • 7
Conventions Used in This Manual
The following notational conventions are used in this manual:
• Itemized lists are identified by a round bullet (•).
• Numbered lists indicate a step-by-step procedure.
• DriverLINX Application Programming Interface and Windows macro
and function names are set in bold when mentioned in the text.
• DriverLINX indicates the exported function name of the device driver
DLL while DriverLINX indicates the product as a whole.
• DriverLINX Application Programming Interface identifiers, menu
items, and Dialog Box names are italicized when mentioned in the text.
• Italics are used for emphasis.
• Source code and data structure examples are displayed in Courier
typeface and bounded by a box with a single line.
Code
• Tables of information are bounded by a box with a double line.
Tables
Concept
• Important concepts and notes are printed in the left margin.
8 • Preface Keithley KPCMCIA-8AO Series
Configuring the KPCMCIA-8AO
Series
Introduction
This manual explains the steps and special features that apply to Keithley’s
KPCMCIA-8AO Series cards.
Installing and configuring DriverLINX for the Keithley KPCMCIA-8AO Series cards
requires three steps:
1. To install your KPCMCIA-8AO hardware, read and follow the
instructions in the hardware manual.
2. To install DriverLINX, follow the general procedure outlined in the
“Read Me First” material on the installation CD.
3. To configure DriverLINX, use the DriverLINX Configuration Panel.
Also see “Configure DriverLINX Device Dialog” on page 9 for
configuration options specific to a Keithley KPCMCIA-8AO Series
model.
Configure DriverLINX Device Dialog
DriverLINX uses a standardized configuration protocol for all data-acquisition
hardware. Even though Windows 95/98/Me automatically selects the hardware base
address and interrupt channel for the KPCMCIA-8AO Series, you must still follow
the configuration process to assign a DriverLINX Logical Device number to a
specific KPCMCIA-8AO Series model in your computer.
When you activate the S
DriverLINX displays the Configure DriverLINX Device dialog. The following
sections describe your choices for configuring DriverLINX to work with a Keithley
KPCMCIA-8AO Series model.
etup… button in the DriverLINX Configuration Panel,
Keithley KPCMCIA-8AO Series Configuring the KPCMCIA-8AO Series • 9
10 • Configuring the KPCMCIA-8AO Series Keithley KPCMCIA-8AO Series
Device Subsystem Page
Note: The Configure DriverLINX Device dialog appears differently under different versions of
Windows.
Use the Device subsystem page to tell DriverLINX the model name and address of
your KPCMCIA-8AO Series card.
Vendor
The Vendor property displays “Keithley Instruments, Inc.” It is a read-only property.
Device
Windows 95/98/Me/2000
Windows NT
The Device property designates the Logical Device you are configuring. It is a readonly property. To change it, first save (OK) or quit (Cancel) the current
configuration. Then select or create a new Logical Device using the DriverLINX
Configuration Panel.
Model
The Model property selects the hardware model of the card you’re configuring.
All cards in this series support eight differential analog output channels and one 8-bit
digital input/output port.
For Windows 95/98/Me/2000, Model is a read-only property—DriverLINX selects
the next unconfigured card. To configure a different card, first save (OK) the current
configuration. Then insert the appropriate card and select or create a new Logical
Device using the DriverLINX Configuration Panel.
For Windows NT, select one of the following models:
Model Resolution 8AO Channels
KPCMCIA-8AOB 12 bits 8 Bipolar (-5 - +5 V)
KPCMCIA-8AOU 12 bits 8 Unipolar (0 - 5 V)
Keithley KPCMCIA-8AO Series Configuring the KPCMCIA-8AO Series • 11
Address
Windows 95/98/Me/2000
Windows NT
Windows 95/98/Me/2000 automatically selects an appropriate address and ignores
this property.
The A
ddress property selects the I/O port address for the card. The default address
used by DriverLINX is 768 decimal or 0x300 hex. If you have another peripheral
card at the same address, you will have to select a free range of 8 addresses.
Detect
The Detect property enables and disables DriverLINX’s hardware detection and
testing algorithms. For maximum system reliability, always leave this check box
marked.
Calibrate
The Calibrate property enables and disables hardware auto-calibration. For best
accuracy, always leave this check box marked.
Special…
The Special… button displays a dialog for configuring any special, hardware-specific
settings. For the KPCMCIA-8AO series, Lo gical Device configuration does not
require any special settings so DriverLINX disables the S
pecial… button.
12 • Configuring the KPCMCIA-8AO Series Keithley KPCMCIA-8AO Series
Analog Output Subsystem Page
Use the Analog Output subsystem page to change the default D/A initialization
voltages.
Channels
The Channels property allows you to select a D/A Logical Channel for individual
configuration of its initialization voltage.
Range
Windows 95/98/Me/2000
Windows NT
The full-scale analog output range for the KPCMCIA-8AO Series is fixed at ±5 volts,
for model 8AOB, or 0 - 5 volts, for model 8AOU. DriverLINX disables this property.
Interrupt
For Windows 95/98/Me/2000, the operating system automatically determines the
interrupt channel for the KPCMCIA-8AO Series card. DriverLINX disables this
property.
For Windows NT, select a free interrupt request level to support interrupt mode
transfers. Valid IRQ levels are: 1 - 15.
DMA level
The KPCMCIA-8AO Series does not use system DMA channels. DriverLINX
disables this property.
Volts
The Volts property allows you to specify a custom output voltage for each DAC that
DriverLINX uses when it initializes the hardware. DriverLINX’s default initialization
value is zero volts. DriverLINX ignores this property unless you also check the
In
itialize property.
Initialize
Checking the Initialize check box instructs DriverLINX to use the Volts property,
rather than the default value, for analog output initialization. The KPCMCIA-8AO
Keithley KPCMCIA-8AO Series Configuring the KPCMCIA-8AO Series • 13
Series does not support this feature. The hardware initializes all analog outputs to
zero volts upon power up.
Calibrate
The Calibrate property enables and disables hardware auto-calibration. DriverLINX
disables this property as the KPCMCIA-8AO Series DACs don’t support auto-
calibration.
14 • Configuring the KPCMCIA-8AO Series Keithley KPCMCIA-8AO Series
Digital Input Subsystem Page
Digital input/output lines (DIGIO0
Channels
The Channels proper ty allows you to select a Logical Channel for configuration or
viewing the channel’s range. Only the KPCMCIA-8AO Series digital input/output
channel has a programmable configurat ion.
DriverLINX defines the following Logical Channels for the KPCMCIA-8AO Series
digital inputs:
Logical Channel DriverLINX Function KPCMCIA-8AO S eries
External Connector
0 Digital Input/Output Port
- DIGIO7)
1 External Trigger EXT_LOAD
2 External Clock EXT_INTR
Range
The Range property specifies the supported digital input range for the selected
Logical Channel. This is a read-only property.
Interrupt
The KPCMCIA-8AO Series uses the same interrupt for digital input as for analog
output. Go to the Analog Output page to set it. DriverLINX disables this property
and displays it as blank.
DMA level
The KPCMCIA-8AO Series does not use system DMA channels. DriverLINX
disables this property and displays it as blank.
Keithley KPCMCIA-8AO Series Configuring the KPCMCIA-8AO Series • 15
Use caution when configuring
and connecting lines to the
digital I/O port. Connecting
an input line to an output
port, or vice versa, could
damage the hardware.
Configuration Setup
The Configuration S
I/O port. The KPCMCIA-8AO Series allows configuring each line of the 8-bit I/O
port for either input or output.
DriverLINX supports two methods for configuring a digital I/O port. The simplified
method configures the whole port, while the advanced method allows you to
configure groups of digital I/O lines.
etup property specifies the hardware configuration of the digital
Simplified Digital I/O Port Configuration
For simplified configuration, enter one of the following values for the S
etup property
to configure the entire port:
• 1—configures all lines in the port as input, or
• 0—configures all lines in the port as output.
Advanced Digital I/O Port Configuration
With advanced configuration, you can divide the port into groups of 1, 2, 4 or 8 lines
and configure each group separately. The following table describes each grouping.
Choose whichever grouping is most convenient.
Grouping Number of Lines in
Each Group
Byte 8 1
Nibble 4 2
Half-Nibble 2 4
Bit 1 8
Number of Groups in
the Port
For advanced configuration, t he S
etup property value has two variable-sized
components:
• Direction Field—consists of a bit for each group in the port. Each bit
indicates the input/output direction of the lines in the group. The leastsignificant bit configures the first group. High-order bits to the left
configure subsequent groups.
For each bit, enter one of the following values to configure the group:
• 1—configures all lines in the group as input, or
• 0—configures all lines in the group as output.
• Group Size Field—consists of a binary 1 immediately to the left of
the Direction field. This allows the position of the S
etup property’s
leftmost 1 to indicate the start of the Direction field.
16 • Configuring the KPCMCIA-8AO Series Keithley KPCMCIA-8AO Series
The following diagrams show the format of the Setup property for each grouping. All
formats have the Group Size field in the high-order bits and the Direction field in the
low-order bits.
Byte-Sized Groups
1
MSB
LSB
• Direction Field—has one bit to configure the single byte-sized group
• Group Size Field—has a value of 0x2 (hexadecimal) or 2 (decimal)
Nibble-Sized Groups
1
MSB
LSB
• Direction Field—has two bits to configure the two nibble-sized
groups
• Group Size Field—has a value of 0x4 (hexadecimal) or 4 (decimal)
Half Nibble-Sized Groups
1
MSB
LSB
• Direction Field—has four bits to confi gure the four half nibble-sized
groups
• Group Size Field—has a value of 0x10 (hexadecimal) or 16
(decimal)
Bit-Sized Groups
1
MSB
LSB
• Direction Field—has eight bits to configure the eight bit-sized groups
• Group Size Field—has a value of 0x100 (hexadecimal) or
512 (decimal)
Keithley KPCMCIA-8AO Series Configuring the KPCMCIA-8AO Series • 17
Advanced Configuration Example:
This example shows how to configure the port in nibbles. It configures the first
nibble as output and the second as input.
1. Choose the Nibble-Sized format and fill in the Direction field, right-toleft, as follows:
0—to configure the first nibble as output
1—to configure the second nibble as input
1
2. Calculate the hexadecimal or decimal value:
0x4 + 0x2 + 0x0 = 0x6
4 + 2 + 0 = 6
1 0
3. Then, enter 0x6 (hexadecimal) or 6 (decimal) for the S
etup property.
Initialize
Checking the Initialize check box instructs DriverLINX to use the Configuration
S
etup property to configure the digital I/O ports. Check Initialize to put the
configuration setup into effect.
Dec
This check box converts the Configuration Setup property to decimal.
Hex
This check box converts the Configuration Setup property to hexadecimal.
18 • Configuring the KPCMCIA-8AO Series Keithley KPCMCIA-8AO Series
Digital Output Subsystem Page
Use the Digital Output subsystem page to change the default digital output port
initialization values.
Channels
The Channels property allows you to select a Logical Channel for initialization or
viewing the channel’s range. KPCMCIA-8AO Series cards only have a single digital
input/output port. The Digital Output subsystem shares this port with the Digital
Input subsystem. The KPCMCIA-8AO Series requires configuration of each line in
the digital input/output port as input or output. See “Digital Input Subsystem Page”
on page 15.
Range
The Range property specifies the supported digital output range for the selected
Logical Channel. This is a read-only property.
Interrupt
The KPCMCIA-8AO Series uses the same interrupt for digital output as for analog
output. Go to the Analog Output page to set it. DriverLINX disables this property
and displays it as blank.
DMA level
The KPCMCIA-8AO Series does not use system DMA channels. DriverLINX
disables this property and displays it as blank.
Initialization Value
The Initialization Value property specifies the digital output value DriverLINX will
write to the selected Logical Channel on hardware initialization. DriverLINX only
writes this value if you enable the In
the hardware-defined initialization values if the In
For the KPCMCIA-8AO Series, the default digital output value is zero.
itialize check box. By default, DriverLINX uses
itialize check box is not checked.
Initialize
Checking the Initialize check box instructs DriverLINX to use the Initialization
V
alue property, rather than the default value, for digital output port initialization.
Keithley KPCMCIA-8AO Series Configuring the KPCMCIA-8AO Series • 19
Dec
This check box converts the Initialization Value property to decimal.
Hex
This check box converts the Initialization Value property to hexadecimal.
20 • Configuring the KPCMCIA-8AO Series Keithley KPCMCIA-8AO Series
For the KPCMCIA-8 AO
Series, there are no
configurable options on the
Counter/Timer subsystem
page.
Counter/Timer Subsystem Page
Resolution
The Resolution property specifies the clock frequency of the master oscillator. Both
models have a 100 kHz clock source for pacing input/output tasks.
Interrupt
The KPCMCIA-8AO Series does not support interrupts from counter/timers.
DriverLINX disables this property and displays it as blank.
Keithley KPCMCIA-8AO Series Configuring the KPCMCIA-8AO Series • 21
Using the KPCMCIA-8AO Series
with DriverLINX
Introduction
This chapter shows you how to set up and use KPCMCIA-8AO Series hardware
features with DriverLINX. The descriptions here use the Edit Service Request dialogs
for language and API independe nce. For the correct syntax with the language you’re
using, please see the DriverLINX Technical Reference Manuals. For DriverLINX
examples in your programming language, please see the source code examples in the
subdirectories of your DriverLINX installation directory or on the original
Distribution Media.
DriverLINX Hardware Model for KPCMCIA-8AO Series
By design DriverLINX provides a portable, hardware-independent API for dataacquisition boards while still allowing applications to access unique or proprietary
hardware features of specific products. To achieve this goal, DriverLINX maps a
hardware-independent, or abstract, data-acquisition model onto KPCMCIA-8AO
Series hardware capabilities.
The following sections describe how DriverLINX implements KPCMCIA-8AO
Series hardware features as Subsystems, Modes, Operations, Events, Logical
Channels, Buffers, and Messages.
DriverLINX Subsystems
The KPCMCIA-8AO Series supports five of DriverLINX’s six Logical Subsystems:
1. Device—refers to a KPCMCIA-8AO model as a whole.
2. Analog Input—refers to the analog input channels, clocks, and control
signals. The KPCMCIA-8AO Series does not support analog input.
3. Analog Output—refers to the analog output channels, clocks, and
control signals.
4. Digital Input—refers to the 8-bit digital input/output port as well as 1-
bit digital input (TTL) control signals, such as EXT_INTR, etc.
Keithley KPCMCIA-8AO Series Using the KPCMCIA-8AO Series with DriverLINX • 23
5. Digital Output—refers to the 8-bit digital input/output port.
6. Counter/Timer—refers to the internal clock channel for pacing
input/output tasks.
DriverLINX Modes
Applications use modes in Service Requests to advise DriverLINX on their preferred
hardware data transfer technique. The DriverLINX modes fall into two general
classes:
• Foreground or synchronous modes. The calling application doesn’t
regain control until DriverLINX completes the Service Request.
DriverLINX supports this mode for simple, single value I/O operations
or software housekeeping functions that DriverLINX can complete
without a significant delay.
• Background or asynchronous modes. The calling application regains
control as soon as DriverLINX initiates the task. The calling application
must synchronize with the data-acquisition task using status polling or
DriverLINX’s messages (preferred). DriverLINX supports this mode
for buffered data transfers or for commands that require a significant
time to complete.
DriverLINX supports three of the four modes with the KPCMCIA-8AO Series for its
commands (Service Requests).
• Polled Mode—This is a foreground or synchronous op eration.
DriverLINX supports this mode for simple, single-value I/O operations
that the data-acquisition card can complete without significant delay.
• Interrupt Mode—T his is a background or asynchronous op eration.
DriverLINX transfers data between the computer’s memory and the
data-acquisition card using hardware interrupts and programmed I/O
transfers.
• DMA Mode—This is a backgro und or asynchronous o peration.
DriverLINX transfers data between the computer’s memory and the
data-acquisition card using memory bus transfers. The KPCMCIA-8AO
Series does not support this transfer mode.
• Other Mode—This i s a foreground or synchronous operation.
DriverLINX supports this mode for initialization, configuration,
calibration, data conversion, and timebase operations.
The following table summarizes the data acquisition modes that DriverLINX
supports for each subsystem with the Keithley KPCMCIA-8AO Series.
24 • Using the KPCMCIA-8AO Series with DriverLINX Keithley KPCMCIA-8AO Series
Loading...