National Instruments GPIB-PC Manuale utente

GPIB-PC User Manual

for the

IBM Personal Computer and

Compatibles

April 1988 Edition

Part Number 320014-01

National Instruments Corporate Headquarters

6504 Bridge Point Parkway

Austin, TX 78730-5039

(512) 794-0100

Technical support fax: (800) 328-2203

(512) 794-5678

Branch Offices:

Australia (03) 879 9422, Austria (0662) 435986, Belgium 02/757.00.20,

Canada (Ontario) (519) 622-9310, Canada (Québec) (514) 694-8521,

Denmark 45 76 26 00, Finland (90) 527 2321, France (1) 48 14 24 24,

Germany 089/741 31 30, Italy 02/48301892, Japan (03) 3788-1921,

Netherlands 03480-33466, Norway 32-848400, Spain (91) 640 0085,

Sweden 08-730 49 70, Switzerland 056/20 51 51, U.K. 0635 523545

Limited Warranty

The GPIB-PC is warranted against defects in materials and workmanship

for a period of two years from the date of shipment, as evidenced by

receipts or other documentation. National Instruments will, at its option,

repair or replace equipment that proves to be defective during the warranty

period. This warranty includes parts and labor.

The media on which you receive National Instruments software are

warranted not to fail to execute programming instructions, due to defects in

materials and workmanship, for a period of 90 days from date of shipment,

as evidenced by receipts or other documentation. National Instruments will,

at its option, repair or replace software media that do not execute

programming instructions if National Instruments receives notice of such

defects during the warranty period. National Instruments does not warrant

that the operation of the software shall be uninterrupted or error free.

A Return Material Authorization (RMA) number must be obtained from the

factory and clearly marked on the outside of the package before any

equipment will be accepted for warranty work. National Instruments will

pay the shipping costs of returning to the owner parts which are covered by

warranty.

National Instruments believes that the information in this manual is

accurate. The document has been carefully reviewed for technical

accuracy. In the event that technical or typographical errors exist, National

Instruments reserves the right to make changes to subsequent editions of

this document without prior notice to holders of this edition. The reader

should consult National Instruments if errors are suspected. In no event

shall National Instruments be liable for any damages arising out of or

related to this document or the information contained in it.

EXCEPT AS SPECIFIED HEREIN, NATIONAL INSTRUMENTS MAKES NO

WARRANTIES, EXPRESS OR IMPLIED, AND SPECIFICALLY DISCLAIMS

ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A

PARTICULAR PURPOSE. CUSTOMER'S RIGHT TO RECOVER DAMAGES

CAUSED BY FAULT OR NEGLIGENCE ON THE PART OF NATIONAL

INSTRUMENTS SHALL BE LIMITED TO THE AMOUNT THERETOFORE

PAID BY THE CUSTOMER. NATIONAL INSTRUMENTS WILL NOT BE

LIABLE FOR DAMAGES RESULTING FROM LOSS OF DATA, PROFITS,

USE OF PRODUCTS, OR INCIDENTAL OR CONSEQUENTIAL DAMAGES,

EVEN IF ADVISED OF THE POSSIBILITY THEREOF. This limitation of the

liability of National Instruments will apply regardless of the form of action,

whether in contract or tort, including negligence. Any action against

National Instruments must be brought within one year after the cause of

action accrues. National Instruments shall not be liable for any delay in

performance due to causes beyond its reasonable control. The warranty

provided herein does not cover damages, defects, malfunctions, or service

failures caused by owner's failure to follow the National Instruments

installation, operation, or maintenance instructions; owner's modification of

the product; owner's abuse, misuse, or negligent acts; and power failure or

surges, fire, flood, accident, actions of third parties, or other events outside

reasonable control.

Under the copyright laws, this publication may not be reproduced or

transmitted in any form, electronic or mechanical, including photocopying,

recording, storing in an information retrieval system, or translating, in

whole or in part, without the prior written consent of National Instruments

Corporation.

Trademarks

Product and company names listed are trademarks or trade names of their

respective companies.

WARNING REGARDING MEDICAL AND

CLINICAL USE OF NATIONAL

INSTRUMENTS PRODUCTS

National Instruments products are not designed with components and

testing intended to ensure a level of reliability suitable for use in treatment

and diagnosis of humans. Applications of National Instruments products

involving medical or clinical treatment can create a potential for accidental

injury caused by product failure, or by errors on the part of the user or

application designer. Any use or application of National Instruments

products for or involving medical or clinical treatment must be performed

by properly trained and qualified medical personnel, and all traditional

medical safeguards, equipment, and procedures that are appropriate in the

particular situation to prevent serious injury or death should always

continue to be used when National Instruments products are being used.

National Instruments products are NOT intended to be a substitute for any

form of established process, procedure, or equipment used to monitor or

safeguard human health and safety in medical or clinical treatment.

©National Instruments Corp. v GPIB-PC User Manual

Preface

Introduction to the GPIB

The GPIB is a link, or bus, or interface system, through which

interconnected electronic devices communicate.

History of the GPIB

The original GPIB was designed by Hewlett-Packard (where it is called

the HP-IB) to connect and control programmable instruments

manufactured by Hewlett-Packard. Because of its high data transfer

rates of from 250 kilobytes to 1 megabyte per second, the GPIB quickly

gained popularity in other applications such as intercomputer

communication and peripheral control. It was later accepted as the

industry standard IEEE-488. The versatility of the system prompted the

name General Purpose Interface Bus.

National Instruments expanded the use of the GPIB among users of

computers manufactured by companies other than Hewlett-Packard.

National Instruments specialized both in high performance, high-speed

hardware interfaces, and in comprehensive, full-function software that

helps users bridge the gap between their knowledge of instruments and

computer peripherals and of the GPIB itself.

The GPIB-PC Family

The GPIB-PC family consists of GPIB interface hardware products,

software, documentation, and other items for several types of personal

computers.

What Your Package Should Contain

Unless you have a special application, your GPIB-PC package consists

of the following:

• A GPIB-PC interface board for your personal computer. Each

board has a model name such as GPIB-PCIIA. This manual uses

GPIB-PC to refer generally to all models of the GPIB-PC

interface board.

Preface

GPIB-PC User Manual vi ©National Instruments Corp.

•AGetting Started with your GPIB-PC pamphlet. The pamphlet

contains the directions with a minimum of explanations for

installing your hardware and software in your GPIB system.

• A GPIB-PC distribution diskette. The distribution diskette is part

of the GPIB-PC package. It contains the DOS handler, BASICA

and QuickBASIC language interfaces, and other programs.

•AGPIB-PC User Manual. The manual contains descriptions of

the GPIB-PC handler functions, BASICA, and QuickBASIC

language interfaces to the handler.

•AProgrammer Reference Guide for BASIC.

• A supplement to Section Two of the manual describing your

particular interface board and how to install it in your personal

computer.

For a language other than BASICA and QuickBASIC, you also need:

• An additional GPIB-PC distribution diskette containing the

software for that language.

• A supplement to Section Four describing the GPIB functions in

the syntax and semantics of that language.

• A Programmer Reference Guide for that language.

Who Are Our Users?

Most of our users have experience in technological fields and with

computers.

How to Get Started

If you already have experience with the GPIB, you may wish to turn

directly to the Getting Started with your GPIB-PC pamphlet that was

shipped with your hardware. It contains directions, with a minimum of

explanations, for installing your hardware and software in your GPIB

system.

If you are less experienced or want more information than the pamphlet

provides, read this GPIB-PC User Manual. It explains in detail all of the

information you will need for the proper operation of the GPIB-PC.

Preface

©National Instruments Corp. vii GPIB-PC User Manual

About the Manual

This manual is written specifically for a GPIB-PC which is to be

installed in an IBM Personal Computer or compatible PC which is

operating under PC-DOS or MS-DOS and programmed using BASICA

and QuickBASIC. With appropriate supplements to the manual, other

GPIB-PC interfaces can be installed in other computers, using other

programming languages.

Organization of the Manual

Section One - Operation of the GPIB describes the operation of the

GPIB.

Section Two - Installation and Configuration describes the installation of

the software and the configuration program IBCONF. A supplement

contains instructions for installing your particular board into your

computer.

Section Three - GPIB-PC Functions — Introduction introduces you to the

functions used by your GPIB-PC. The features are divided into groups

as a means of helping you understand the uses of the functions.

Section Four - GPIB-PC Functions — Overview introduces you to

programming information common to all languages.

Section Four A - Function Reference — Language Interface(s) pertains to

BASICA and QuickBASIC. The descriptions are listed alphabetically

for easy reference.

Section Five - IBIC introduces you to IBIC, the interactive control

program that allows you to control and communicate with the GPIB

through functions you enter at your keyboard. IBIC is designed to help

you learn how to use the GPIB-PC functions to program your devices.

Section Six - Applications Monitor introduces you to the applications

monitor, a resident program that is useful in debugging sequences of

GPIB calls from within your application.

Appendix A - Multiline Interface Messages is a listing of Multiline

Interface Command Messages.

Appendix B - Common Errors and Their Solutions singles out the most

common errors users have encountered and some probable solutions.

Preface

GPIB-PC User Manual viii ©National Instruments Corp.

Appendix C - Differences Between Software Revisions points out

differences between revisions of the GPIB-PC handler.

Appendix D - Using your Printer with the GPIB-PC gives some quick

steps to connect your GPIB-PC with your printer.

Appendix E - Application Notes is an application note about computer-

to-computer transfers.

Appendix F - Customer Communication contains forms you can use to

request help from National Instruments or to comment on our products

and manuals.

The Glossary contains an alphabetical list and description of terms used

in this manual, including abbreviations, acronyms, metric prefixes,

mnemonics, and symbols.

The Index contains an alphabetical list of key terms and topics in this

manual, including the page where you can find each one.

Now, with your personal computer, your GPIB-PC, your manuals and

supplements, and these instructions, you are ready to get started with

your GPIB. We hope your experience will be a rewarding one.

Customer Support

National Instruments wants to receive your comments on our products

and manuals. We are interested in the applications you develop with

our products, and we want to help if you have problems with them. For

information on how to contact us, refer to Appendix F, Customer

Communication, at the end of this manual.

©National Instruments Corp. ix GPIB-PC User Manual

Contents

Section One - Operation of the GPIB................................................1-1

Types of Messages......................................................................................1-1

Talkers, Listeners, and Controllers.....................................................1-1

The Controller-In-Charge and System Controller.........................1-2

GPIB Signals and Lines...........................................................................1-3

Data Lines.....................................................................................1-3

Handshake Lines........................................................................1-3

NRFD (not ready for data)..................................1-3

NDAC (not data accepted).................................1-4

DAV (data valid).....................................................1-4

Interface Management Lines...............................................1-4

ATN (attention)........................................................1-4

IFC (interface clear)..............................................1-4

REN (remote enable)............................................1-4

SRQ (service request)...........................................1-5

EOI (end or identify)..............................................1-5

Physical and Electrical Characteristics............................................1-5

Configuration Requirements...................................................................1-9

Related Documents....................................................................................1-9

Section Two - Installation and Configuration............................2-1

Installing the Hardware.............................................................................2-1

The GPIB-PC Software Package.........................................................2-1

Additional Programs and Files............................................2-2

Installing the Software..............................................................................2-3

Step 1 - Preparation..................................................................2-3

Booting from a Floppy Disk...............................2-3

Booting from a Hard Disk....................................2-3

Step 2 - Run IBSTART...........................................................2-4

Step 3 - Run IBCONF (optional).......................................2-5

Step 4 - Reboot...........................................................................2-5

Step 5 - Test Software Installation....................................2-5

More About IBCONF.................................................................................2-6

Characteristics of the Instruments.....................................2-7

Characteristics of each GPIB-PC......................................2-7

Default Configurations..............................................................................2-8

Primary Default Characteristics.........................................2-8

Contents

GPIB-PC User Manual x ©National Instruments Corp.

Running IBCONF........................................................................................2-9

Upper and Lower Levels of IBCONF............................2-10

Upper Level - Device Map

for Board GPIBx....................................................2-10

Device Map Concepts and Terms................2-11

Lower Level - Device/Board

Characteristics.......................................................2-11

Device and Board Characteristics..................................2-12

Primary GPIB Address.......................................2-12

Secondary GPIB Address..................................2-12

Timeout Settings...................................................2-12

EOS Byte..................................................................2-14

EOS Modes..............................................................2-14

Set EOI with last byte of Write.....................2-14

GPIB-PC Model....................................................2-14

Board is System Controller

(Boards Only).........................................................2-14

Local Lockout on all Devices

(Boards Only).........................................................2-15

Disable Auto Serial Polling

(Boards Only).........................................................2-15

High-Speed Timing

(Boards Only).........................................................2-15

Interrupt Jumper Setting

(Boards Only).........................................................2-15

Base I/O Address (Boards Only)...................2-15

DMA Channel (Boards Only).........................2-16

Internal Clock Frequency

(Boards Only).........................................................2-16

Exiting IBCONF......................................................................2-16

Using Your GPIB-PC.............................................................................. 2-18

Section Three - GPIB-PC

Functions — Introduction............................................................................3-1

Introduction to the GPIB-PC Functions............................................3-1

High-Level Functions..............................................................3-1

Low-Level Functions...............................................................3-1

Calling Syntax............................................................................3-1

Group I..............................................................................................................3-2

IBRD (bd,buf,cnt).....................................................................3-2

IBWRT (bd,buf,cnt).................................................................3-2

IBFIND (bdname,bd)...............................................................3-3

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