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National Instruments NI-488.2 - User Manual
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NI-488.2
™
NI-488.2 User Manual
for Windows
NI-488.2 User Manual for Windows
June 1999
Edition
Part Number 321819D-
01
2
Table of Contents
Main Page
Default Chapter
3
Important Information
3
Table of Contents
4
About this Manual
10
Using the NI-488.2 Documentation
10
Accessing the NI-488.2 Online Help
10
Conventions
11
Related Documentation
11
Appendix E
12
Appendix F
12
Figure 1-1. Linear and Star System Configuration
12
Controlling more than One Interface
13
Configuration Requirements
13
Figure 1-2. Example of Multiboard System Configuration
13
Figure
15
Chapter 1 Introduction
12
Setting up and Configuring Your System
12
Chapter 2 Measurement & Automation Explorer
15
Overview
15
Starting Measurement & Automation Explorer
16
Getting Started with NI-488.2
16
Figure 2-1. Measurement & Automation Explorer
16
Figure 2-2. Viewing Documentation on Your CD
17
Troubleshoot NI-488.2 Problems
18
Add a New GPIB Interface
18
Figure 2-3. NI-488.2 Troubleshooting Wizard
18
Delete a GPIB Interface
19
Scan for GPIB Instruments
19
Instruments Not Found
20
Instruments Enumeration Failed
20
Communicate with Your Instrument
20
Basic Communication (Query/Write/Read)
20
Advanced Communication
21
Figure 2-4. NI-488.2 Communicator
21
View NI-488.2 Software Version
22
Monitor, Record, and Display NI-488.2 Calls
22
View or Change GPIB Interface Settings
23
Windows 98/95
23
Figure 2-5. NI-488.2 Calls Recorded by ni Spy
23
Windows 2000/NT
24
Figure 2-6. Properties Dialog Box in Windows 98/95
24
View GPIB Instrument Information
25
Table
25
Figure 2-7. GPIB Configuration Utility in Windows NT
25
Change GPIB Device Templates
26
Windows 98/95
26
Measurement & Automation Explorer Instrument Information
26
Windows 2000/NT
27
Enable/Disable NI-488.2 DOS Support
27
Windows 98/95
27
Windows 2000/NT
28
Access Additional Help and Resources
28
NI-488.2 Online Help
28
National Instruments GPIB Web Site
29
View or Change GPIB-ENET Network Settings (Windows 98/95 Only)
29
Assign IP Address
29
Configure Advanced IP Settings
29
Update GPIB-ENET Firmware
30
Chapter 3 Developing Your NI-488.2 Application
31
Simple Instrument Control
31
Interactive Instrument Control
32
Figure 3-1. NI-488.2 Communicator
32
Choosing Your Programming Methodology
33
Choosing a Method to Access the NI-488.2 Driver
33
Direct Entry Access
33
NI-488.2 Language Interfaces
33
Choosing How to Use the NI-488.2 API
34
Communicating with a Single GPIB Device
34
Using Multiple Interfaces And/Or Multiple Devices
35
Checking Status with Global Variables
35
Status Word (Ibsta)
35
Table 3-1. Status Word Layout
36
Error Variable (Iberr)
37
Count Variables (Ibcnt and Ibcntl)
37
Using Interactive Control to Communicate with Devices
37
Programming Models
38
Applications that Communicate with a Single GPIB Device
38
General Program Steps and Examples
38
Items to Include
38
Applications that Use Multiple Interfaces or Communicate with Multiple GPIB Devices
40
General Program Steps and Examples
40
Items to Include
40
Language-Specific Programming Instructions
42
Microsoft Visual C/C++ (Version 2.0 or Later)
42
Borland C/C++ (Version 4.0 or Later)
42
Visual Basic (Version 4.0 or Later)
43
Direct Entry with C
43
Gpib-32.Dll Exports
43
Directly Accessing the Gpib-32.Dll Exports
44
Running Existing NI-488.2 Applications
47
Running Existing Win32 and Win16 NI-488.2 Applications
47
Running Existing DOS NI-488.2 Applications under Windows 98/95
47
Running Existing DOS NI-488.2 Applications under Windows 2000/NT
48
Chapter 4 Debugging Your Application
49
NI Spy
49
Global Status Variables
50
Figure 4-1. NI-488.2 Calls Recorded by ni Spy
50
Existing Applications
51
NI-488.2 Error Codes
51
Configuration Errors
51
Timing Errors
52
Communication Errors
53
Repeat Addressing
53
Termination Method
53
Other Errors
53
Chapter 5 NI Spy Utility
54
Overview
54
Starting ni Spy
54
Using the ni Spy Online Help
55
Locating Errors with ni Spy
55
Viewing Properties for Recorded Calls
55
Figure 5-1. NI-488.2 Calls Recorded by ni Spy
55
Exiting ni Spy
56
Performance Considerations
56
Chapter 6 Interactive Control Utility
57
Overview
57
Getting Started with Interactive Control
57
Figure 6-1. Instrument Address in Measurement & Automation Explorer
58
Interactive Control Syntax
60
Number Syntax
60
String Syntax
60
Address Syntax
61
Interactive Control Commands
61
Table 6-1. Syntax for Device-Level Traditional NI-488.2 Calls in
61
Interactive Control
63
Table 6-3. Syntax for Multi-Device NI-488.2 Calls in Interactive Control
64
Table 6-4. Auxiliary Functions in Interactive Control
65
Status Word
66
Error Information
66
Count Information
67
Chapter 7 NI-488.2 Programming Techniques
68
Termination of Data Transfers
68
High-Speed Data Transfers (HS488)
69
Enabling HS488
69
System Configuration Effects on HS488
70
Waiting for GPIB Conditions
71
Asynchronous Event Notification in Win32 NI-488.2 Applications
71
Calling the Ibnotify Function
71
Ibnotify Programming Example
72
Writing Multithreaded Win32 NI-488.2 Applications
76
Device-Level Calls and Bus Management
78
Talker/Listener Applications
78
Serial Polling
79
Service Requests from IEEE 488 Devices
79
Service Requests from IEEE 488.2 Devices
79
Automatic Serial Polling
80
Stuck SRQ State
80
Autopolling and Interrupts
81
SRQ and Serial Polling with Device-Level Traditional NI-488.2 Calls
81
SRQ and Serial Polling with Multi-Device NI-488.2 Calls
82
Example 1: Using Findrqs
83
Example 2: Using Allspoll
83
Parallel Polling
84
Implementing a Parallel Poll
84
Parallel Polling with Traditional NI-488.2 Calls
84
Parallel Polling with Multi-Device NI-488.2 Calls
86
GPIB Basics
87
Talkers, Listeners, and Controllers
87
Data Lines
88
Figure A-1. GPIB Address Bits
88
GPIB Addressing
88
Table A-1. GPIB Handshake Lines
89
Table A-2. GPIB Interface Management Lines
89
Table B-1. Status Word Layout
90
Error Codes and Solutions
95
Table C-1. GPIB Error Codes
95
Table D-1. Device Manager Status Codes
106
Enabling Interrupts
107
Common Questions
108
Interactive Control
110
Technical Support Resources
115
Worldwide Support
116
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National Instruments NI-488.2 Specifications
General
Brand
National Instruments
Model
NI-488.2
Category
Controller
Language
English
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