National Instruments GPIB-SCSI-A Manuel utilisateur

GPIB-SCSI-A

User Manual

SCSI-to-IEEE 488 Controller

July 1994 Edition

Part Number 320427-01

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-SCSI-A 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 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

NI-488® is a trademark of National Instruments Corporation.

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.

FCC/DOC Radio Frequency

Interference Compliance

This equipment generates and uses radio frequency energy and, if not

installed and used in strict accordance with the instructions in this manual,

may cause interference to radio and television reception. This equipment

has been tested and found to comply with the following two regulatory

agencies:

Federal Communications Commission

This device complies with Part 15 of the Federal Communications

Commission (FCC) Rules for a Class A digital device. Operation is subject

to the following two conditions:

1. This device may not cause harmful interference in commercial

environments.

2. This device must accept any interference received, including

interference that may cause undesired operation.

Canadian Department of Communications

This device complies with the limits for radio noise emissions from digital

apparatus set out in the Radio Interference Regulations of the Canadian

Department of Communications (DOC).

Le présent appareil numérique n’émet pas de bruits radioélectriques

dépassant les limites applicables aux appareils numériques de classe A

prescrites dans le règlement sur le brouillage radioélectrique édicté par le

ministère des communications du Canada.

Instructions to Users

These regulations are designed to provide reasonable protection against

harmful interference from the equipment to radio reception in commercial

areas. Operation of this equipment in a residential area is likely to cause

harmful interference, in which case the user will be required to correct the

interference at his own expense.

There is no guarantee that interference will not occur in a particular

installation. However, the chances of interference are much less if the

equipment is installed and used according to this instruction manual.

If the equipment does cause interference to radio or television reception,

which can be determined by turning the equipment on and off, one or more

of the following suggestions may reduce or eliminate the problem.

• Operate the equipment and the receiver on different branches of your

AC electrical system.

• Move the equipment away from the receiver with which it is interfering.

• Reorient or relocate the receiver’s antenna.

• Be sure that the equipment is plugged into a grounded outlet and that

the grounding has not been defeated with a cheater plug.

Notice to user: Changes or modifications not expressly approved by

National Instruments could void the user’s authority to

operate the equipment under the FCC Rules.

If necessary, consult National Instruments or an experienced radio/television

technician for additional suggestions. The following booklet prepared by

the FCC may also be helpful: How to Identify and Resolve Radio-TV

Interference Problems. This booklet is available from the U.S. Government

Printing Office, Washington, DC 20402, Stock Number 004-000-00345-4.

Contents

About This Manual ..........................................................................xvii

Organization of This Manual......................................................xvii

Conventions Used in This Manual.............................................xix

Related Documentation ..............................................................xix

Customer Communication..........................................................xix

Chapter 1

Description of the GPIB-SCSI-A................................................1-1

What You Need to Get Started...................................................1-2

Optional Equipment....................................................................1-3

Inspection ...................................................................................1-4

GPIB-SCSI-A Specifications .....................................................1-4

The GPIB-SCSI-A Front Panel ..................................................1-7

The GPIB-SCSI-A Rear Panel ...................................................1-8

The SCSI Port.............................................................................1-9

The GPIB Port ............................................................................1-10

Choosing Between S Mode and G Mode...................................1-10

Chapter 2

Installation and Configuration of the GPIB-SCSI-A.........2-1

Installation ..................................................................................2-1

Step 1. Verify the Voltage Requirement....................2-1

Step 2. Configure the Operating Characteristics .......2-2

Configuration Switch Settings for SW1 ........2-2

Configuration Switch Settings for SW2

in S Mode.......................................................2-5

Configuration Switch Settings for SW2

in G Mode......................................................2-7

SCSI Terminating Resistors...........................2-8

Step 3. Connect the Cables ........................................2-10

Step 4. Switch On Your GPIB-SCSI-A and

Power on Your System ..................................2-11

Chapter 3

Technical Information ....................................................................3-1

Assumption of Previous Knowledge..........................................3-1

Buffering Methods......................................................................3-1

Contents

GPIB-SCSI-A User Manual viii © National Instruments Corp.

S Mode Operation.......................................................................3-2

Configuration Switches at SW2...................................3-3

Switch 7.........................................................3-3

Switch 6.........................................................3-4

Switch 5.........................................................3-4

Switch 4.........................................................3-5

Switches 1 Through 3 ....................................3-5

G Mode Operation......................................................................3-6

Configuration Switches at SW2...................................3-6

Switch 7.........................................................3-6

Switch 6.........................................................3-7

Switch 5.........................................................3-8

Switch 4.........................................................3-9

Switches 1 Through 3 ....................................3-9

Chapter 4

Programming in S Mode................................................................4-1

Programming Messages..............................................................4-1

Programming Message Format ....................................4-1

Function Names and Opcodes....................................................4-2

GPIB Address...............................................................4-2

Status Information ......................................................................4-3

GPIB Read and Write Termination Method (END and EOS) ...4-3

The SCSI Message System and the GPIB-SCSI-A in S Mode ..4-4

S Mode Error Indication.............................................................4-4

Disconnection/Reconnection......................................................4-5

Disconnection/Reconnection during Data Transfers ...4-5

Disconnection/Reconnection while Waiting for

GPIB Events.................................................................4-8

S Mode Default Settings.............................................................4-10

S Mode Functions.......................................................................4-11

GPIB Function Group ..................................................4-11

SCSI Function Group...................................................4-14

General Use Function Group .......................................4-14

Alphabetical List of S Mode Functions......................................4-15

Chapter 5

S Mode Functions .............................................................................5-1

Points to Remember ...................................................................5-1

Understanding the Examples......................................................5-2

S Mode Function Descriptions...................................................5-4

brd - Board Level Read Data ................................................5-5

bwrt - Board Level Write Data...............................................5-10

Contents

cac - Become Active Controller ...........................................5-15

caddr - Change the GPIB Address of the GPIB-SCSI-A.........5-17

clr - Clear Specified Device*...............................................5-20

cmd - Send GPIB Commands.................................................5-23

config - Read/Change GPIB-SCSI-A Configuration.................5-26

eos - Change/Disable GPIB EOS Termination Mode ..........5-30

eot - Enable/Disable END Message on GPIB Writes ..........5-34

gts - Go from Active Controller to Standby.........................5-36

id - Identify System ............................................................5-39

inq - Inquiry..........................................................................5-41

ist - Set or Clear Individual Status Bit.................................5-45

lines - Return the State of the Eight GPIB Control Lines.......5-47

ln - Check for the Presence of a Listening Device

on the Bus.....................................................................5-49

loc - Go to Local *................................................................5-51

onl - Place the GPIB-SCSI-A Online/Offline.......................5-54

pct - Pass Control .................................................................5-56

ppc - Parallel Poll Configure.................................................5-58

ppu - Parallel Poll Unconfigure.............................................5-62

rd - Read Data *..................................................................5-64

rpp - Request (Conduct) a Parallel Poll ................................5-70

rqsns - Request Sense...............................................................5-72

rsc - Request/Release System Control .................................5-76

rsp - Request (Conduct) a Serial Poll...................................5-79

rsv - Request Service/Set or Change Serial Poll

Status Byte ...................................................................5-82

sic - Send Interface Clear.....................................................5-84

sre - Set/Clear Remote Enable .............................................5-86

stat - Return GPIB-SCSI-A Status........................................5-89

tmo - Change or Disable Time Limit.....................................5-98

trg - Trigger Specified Device * ..........................................5-102

wait - Wait for Selected Event ...............................................5-105

wrt - Write Data *.................................................................5-110

Chapter 6

Programming in G Mode...............................................................6-1

Programming Messages..............................................................6-1

Programming Message Format ....................................6-1

Example of a Programming Message............6-1

How Messages are Processed.......................................6-3

Function Names..........................................................................6-3

Function Argument Delimiters...................................................6-3

Numerical Input and Output.........................................6-4

Contents

GPIB-SCSI-A User Manual x © National Instruments Corp.

Status and Error Information......................................................6-4

Communicating with the GPIB-SCSI-A and SCSI

Peripherals ..................................................................................6-5

Addressing Terminology..............................................6-5

The GPIB-SCSI-A and SCSI System as Listener.......................6-5

The GPIB-SCSI-A and SCSI System as Talker.........................6-7

GPIB Read and Write Termination (END and EOS).................6-8

SCSI Data Transmission.............................................................6-9

The SCSI Message System and the GPIB-SCSI-A....................6-9

Handling of SCSI Phases in G Mode.........................................6-9

Commands That Do Not Require a Data Phase...........6-10

Commands That Require a Data In Phase....................6-10

Commands That Require a Data Out Phase.................6-11

Disconnection/Reconnection .......................................6-11

G Mode Default Settings............................................................6-12

G Mode Functions ......................................................................6-12

SCSI Function Group...................................................6-13

SCSI Configuration Function Group ...........................6-17

GPIB Configuration Function Group...........................6-18

General Use Function Group .......................................6-18

List of G Mode Functions in Alphabetical Order.......................6-19

Operation of the GPIB-SCSI-A as a GPIB Device ....................6-23

Serial Poll.....................................................................6-24

SCSI Bits .......................................................6-24

DCR Bit.........................................................6-24

RDY Bit.........................................................6-25

ERR Bit..........................................................6-25

SRQ* Bit........................................................6-25

Parallel Poll ..................................................................6-26

Group Execute Trigger (GET).....................................6-26

Go To Local (GTL)......................................................6-26

Take Control (TCT) .....................................................6-26

Device Clear.................................................................6-26

Chapter 7

G Mode Functions.............................................................................7-1

Points to Remember ...................................................................7-1

Points to Remember in the Function Examples .........................7-2

G Mode Function Descriptions...................................................7-3

autotst - Enable/Disable Automatic Testing of SCSI Targets..7-4

blksz - Set Blocksize ..............................................................7-7

cmd - Build SCSI Command Descriptor Block and

Execute SCSI Command Phase..................................7-9

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