National Instruments GPIB-SBX User manual

GPIB-SBX

User Manual

January 1996 Edition

Part Number 320015-01

National Instruments Corporate Headquarters

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(512) 794-0100

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Limited Warranty

The GPIB-SBX 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.

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 Instrument 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 names listed are trademarks of their respective manufacturers. 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.

Preface

This manual contains information you need to install, configure, and use the GPIB-SBX

interface board. Included in this manual are descriptions of the interface registers, programming

considerations, diagnostic tests, and sample programs.

Organization of the GPIB-SBX User Manual

The GPIB-SBX User Manual is organized as follows:

• Chapter 1, Introduction, contains a brief description of the GPIB-SBX kit, a list of equipment

supplied, and a list of optional equipment.

• Chapter 2, General Description, contains the physical and electrical specifications for the

GPIB-SBX and describes the characteristics of key interface board components.

• Chapter 3, Configuration and Installation, describes the steps needed to configure and install

the GPIB-SBX hardware.

• Chapter 4, Register Descriptions, contains detailed descriptions of the interface registers as

well as summary tables for easy reference.

• Chapter 5, Programming Considerations, explains important considerations for persons

programming the GPIB-SBX.

• Chapter 6, Theory of Operation, contains a detailed technical discussion of the major

elements of the GPIB-SBX.

• Chapter 7, Diagnostic and Troubleshooting Test Procedures, contains test procedures for

determining if the GPIB-SBX is installed properly and operating correctly.

• Appendix A, Parts List and Schematic Diagram, includes a parts list and detailed schematic

diagram.

• Appendix B, Sample Programs, provides sample programs in 8080 and 8088 Assembly

language code for implementing the most commonly used GPIB functions. Line-by-line

comments provide an explanation of each function.

• Appendix C, Multiline Interface Messages, contains a listing of the multiline GPIB interface

messages.

• Appendix D, Mnemonics Key, contains an alphabetical listing of all mnemonics used in this

manual and indicates whether the mnemonic represents a bit, register, function, remote

message, local message, or a state.

• The Index contains an alphabetical list of key terms and topics used in this manual, including

the page where each one can be found.

Preface

GPIB-SBX User Manual vi © National Instruments Corporation

Terminology

The term set is used throughout this manual to mean writing a value of 1 to a memory element.

The term clear is used to mean writing a value of 0 to a memory element. The terms set to zero,

set false, preset, and reset are avoided in preference to the use of set and clear. Bit signatures are

written in upper case letters. An asterisk (*) after a bit signature indicates the signal is active

low. An asterisk is equivalent to an overbar. For example, if bit ATN*=0, the GPIB ATN signal

line is asserted. After the mnemonic of a register name is introduced and the name written out,

the mnemonic is used thereafter.

Where it is necessary to specify a particular bit of a register the bit position appears as a decimal

number in square brackets after the mnemonic (for example, ISR1[2] indicates the ERR bit of

Interrupt Status Register 1).

Uppercase mnemonics are used for control, status, data registers, register contents, and interface

functions, as well as GPIB remote messages, commands, and logic states as defined in the IEEE-

488 standard.

The term addressed means the interface has been configured to perform a function from the

GPIB side, while the term programmed means that it has been configured from the SBX bus

side. This distinction is important to make because many functions, such as making the interface

a Talker or Listener, can be activated from either side.

In logical expressions a minus sign (-) is used to indicate logical negation, an ampersand (&)

represents AND, and a plus sign (+) represents OR. In some cases, a plus sign is used to indicate

addition, such as I/O addresses for interface registers in Chapter 4.

All numbers are decimal unless specified otherwise. Register offsets are given in hexadecimal.

Abbreviations

The following abbreviations are used in the text of this manual.

≥greater than or equal to

< less than

A ampere

hex hexadecimal

in. inch

kbytes/sec 1,000 bytes per second

K 1,024 bytes of memory

m meter

µA microampere

µsec microsecond

mA milliampere

MHz megahertz

nsec nanosecond

V volt

VDC volts direct current

Preface

Related Documents

The following documents contains information that you may find helpful as you read this

manual:

•IEEE Standard Digital Interface for Programmable Instrumentation, ANSI/IEEE Standard

488.1-1987

•

PD7210 GPIB-IFC User's Manual, NEC Electronics USA, Inc., One Natick Executive

Park, Natick, MA 01760

•

PD7210 Intelligent GPIB Interface Controller, Engineering Data Sheet, NEC Electronics

USA, Inc., Microcomputer Division

•How to Interface a Microcomputer System to a GPIB, (& The NEC µPD7210 TLC), NEC

Electronics USA, Inc.

•Intel iSBX Bus Specification, (manual order number 142686-002) Intel Corporation, 3065

Bowers Ave., Santa Clara, CA 95051

•Designing iSBX Multimodule Boards, Stephen Grubb, OEM Microcomputer Systems

Applications, Intel Corporation

Customer Communication

We appreciate communicating with the people who use our products. To make it easy for you to

communicate with us, we provide a User Comment Form for documentation comments. Please

mail it to the address printed at the bottom of the form.

If you encounter any technical problems, you can use the following toll-free number between the

hours of 8:00 a.m. and 5:30 p.m. (central time) to reach the National Instruments applications

engineering department:

(512) 794-0100

(800) IEEE-488 (toll-free U.S. and Canada)

Contents

Chapter 1

Introduction .........................................................................................................................1-1

GPIB-SBX Interface Kit Description ...........................................................................1-1

What Your Kit Should Contain .....................................................................................1-2

Optional Equipment ......................................................................................................1-2

Chapter 2

General Description...........................................................................................................2-1

GPIB-SBX Specifications..............................................................................................2-1

Physical Specifications......................................................................................2-1

Electrical Specifications.....................................................................................2-1

SBX Interface Bus Signals.............................................................................................2-3

Control Lines......................................................................................................2-5

Command Lines (IORD*, IOWRT*).....................................................2-5

DMA Lines (MDRQT, MDACK*, TDMA)..........................................2-5

Initialize Line (MRESET)......................................................................2-5

Clock Line (MCLK)...............................................................................2-5

System Control Lines (MWAIT*, MPST*)...........................................2-5

Address and Chip Select Lines (MA2-MA0, MCS1*-MCS0*)........................2-5

Data Lines (MD7-MD0)....................................................................................2-6

Interrupt Line (MINTR1-MINTR0)...................................................................2-6

Power and Ground Lines (+5 V, +-12 V, GND)................................................2-6

Data Transfer Modes and Performance.........................................................................2-6

Description of the General Purpose Interface Bus (GPIB)............................................2-7

GPIB Operation..................................................................................................2-7

GPIB Signal Lines.............................................................................................2-8

GPIB Physical Characteristics...........................................................................2-9

GPIB-SBX Functional Description................................................................................2-10

Chapter 3

Configuration and Installation.......................................................................................3-1

Configuration.................................................................................................................3-1

Installation......................................................................................................................3-1

Cabling...........................................................................................................................3-3

Verification Testing.......................................................................................................3-4

Chapter 4

Register Descriptions.........................................................................................................4-1

Introduction....................................................................................................................4-1

Terminology...................................................................................................................4-1

Interface Registers..........................................................................................................4-2

Data In Register (DIR).......................................................................................4-5

Command/Data Out Register (CDOR)..............................................................4-6

Interrupt Status Register 1 (ISR1)......................................................................4-7

Interrupt Mask Register 1 (IMR1).....................................................................4-7

Contents

GPIB-SBX User Manual ix© National Instruments Corporation

Interrupt Status Register 2 (ISR2)......................................................................4-13

Interrupt Mask Register 2 (IMR2).....................................................................4-13

Serial Poll Status Register (SPSR).....................................................................4-17

Serial Poll Mode Register (SPMR)....................................................................4-17

Address Status Register (ADSR).......................................................................4-18

Address Mode Register (ADMR)......................................................................4-20

Command Pass Through Register (CPTR)........................................................4-23

Auxiliary Mode Register (AUXMR).................................................................4-24

Hidden Registers................................................................................................4-31

Internal Counter Register (ICR).............................................................4-31

Parallel Poll Register (PPR)...................................................................4-32

Auxiliary Register A (AUXRA)............................................................4-34

Auxiliary Register B (AUXRB).............................................................4-36

Auxiliary Register E (AUXRE).............................................................4-38

Address Register 0 (ADR0)...............................................................................4-39

Address Register (ADR)....................................................................................4-40

Address Register 1 (ADR1)...............................................................................4-41

End Of String Register (EOSR).........................................................................4-43

Chapter 5

Programming Considerations........................................................................................5-1

Initialization...................................................................................................................5-1

The GPIB-SBX as GPIB Controller..............................................................................5-2

Becoming Controller-In-Charge (CIC) and Active Controller..........................5-2

Sending Remote Multiline Messages (Commands)...........................................5-3

Going from Active to Standby Controller..........................................................5-3

Going from Standby to Active Controller..........................................................5-4

Going from Active to Idle Controller................................................................5-4

The GPIB-SBX as GPIB Talker and Listener...............................................................5-5

Programmed Implementation of Talker and Listener........................................5-5

Addressed Implementation of Talker and Listener............................................5-5

Address Mode 1.....................................................................................5-5

Address Mode 2.....................................................................................5-5

Address Mode 3.....................................................................................5-6

Sending/Receiving Messages.........................................................................................5-7

Sending and Receiving Data (Programmed I/O Mode).....................................5-7

Sending and Receiving Data (DMA Mode).......................................................5-7

Sending END or EOS........................................................................................5-8

Terminating on END or EOS.............................................................................5-8

Serial Polls.....................................................................................................................5-8

Conducting Serial Polls......................................................................................5-8

Responding to a Serial Poll................................................................................5-8

Parallel Polls..................................................................................................................5-9

Conducting a Parallel Poll..................................................................................5-9

Responding to a Parallel Poll.............................................................................5-10

Interrupts........................................................................................................................5-11

Contents

GPIB-SBX User Manual x© National Instruments Corporation

Chapter 6

Theory of Operation..........................................................................................................6-1

SBX Bus Interface.........................................................................................................6-1

GPIB Talker/Listener/Controller (TLC)........................................................................6-2

GPIB Interface...............................................................................................................6-3

Chapter 7

Diagnostic and Troubleshooting Test Procedures..................................................7-1

Interpreting Test Procedures..........................................................................................7-1

GPIB-SBX Hardware Installation Tests........................................................................7-2

Appendix A

Parts Listand SchematicDiagram .............................................................................A-1

Appendix B

SamplePrograms................................................................................................................B-1

Appendix C

MultilineInterfaceMessages..........................................................................................C-1

Appendix D

MnemonicsKey...................................................................................................................D-1

Index..................................................................................................................................Index-1

Contents

GPIB-SBX User Manual xi© National Instruments Corporation

Figures

Figure1-1. GPIB-SBX Interface Board .............................................................................1-1

Figure2-1. GPIB-SBX with a Multibus Computer............................................................2-11

Figure2-2. GPIB-SBX in a Multiprocessor Application....................................................2-12

Figure2-3. GPIB-SBX Block Diagram..............................................................................2-13

Figure3-1. GPIB Cable Shield Grounding.........................................................................3-1

Figure3-2. GPIB-SBX Installed on Host Board.................................................................3-2

Figure3-3. GPIB Cable Connector.....................................................................................3-3

Figure3-4. GPIB-SBX Cable-to-Interface Board Connection...........................................3-4

Figure4-1. GPIB-SBX Interface Registers.........................................................................4-3

Figure4-2. Writing to the Hidden Registers.......................................................................4-4

Tables

Table2-1. Electrical Connections of the GPIB-SBX Interface.........................................2-1

Table2-2. Loading on Incoming SBX Signal Lines.........................................................2-2

Table2-3. Drive Capability of Output SBX Signal Lines.................................................2-2

Table2-4. GPIB-SBX Connector Pin Assignments..........................................................2-3

Table2-5. GPIB-SBX Internal Registers..........................................................................2-6

Table2-6. GPIB-SBX IEEE-488 Interface Capabilities...................................................2-14

Table4-1. Clues to Understanding Mnemonics................................................................4-1

Table4-2. Auxiliary Command Summary........................................................................4-25

Table4-3. Auxiliary Commands: Detail Description........................................................4-26

Table4-4. Examples for Configuring the PPR..................................................................4-33

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