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© National Instruments Corp. 2-1 NI-488.2 User Manual for Windows
Chapter 2
Application Examples
This chapter contains nine sample applications designed to illustrate specific GPIB
concepts and techniques that can help you write your own applications. The description
of each example includes the programmer's task, a program flowchart, and numbered
steps which correspond to the numbered blocks on the flowchart.
Use this chapter along with your NI-488.2 software, which includes the C and Visual
Basic source code for each of the nine examples. The programs are listed in order of
increasing complexity. If you are new to GPIB programming, you might want to study
the contents and concepts of the first sample, simple.c, before moving on to more
complex examples.
The following example programs are included with your NI-488.2 software:
• simple.c is the source code file for Example 1. It illustrates how you can establish
communication between a host computer and a GPIB device.
• clr_trg.c is the source code file for Example 2. It illustrates how you can clear
and trigger GPIB devices.
• asynch.c is the source code file for Example 3. It illustrates how you can perform
non-GPIB tasks while data is being transferred over the GPIB.
• eos.c is the source code file for Example 4. It illustrates the concept of the end-of-
string (EOS) character.
• rqs.c is the source code file for Example 5. It illustrates how you can communicate
with GPIB devices that use the GPIB SRQ line to request service. This sample is
written using NI-488 functions.
• easy4882.c is the source code file for Example 6. It is an introduction to NI-488.2
routines.
• rqs4882.c is the source code file for Example 7. It uses NI-488.2 routines to
communicate with GPIB devices that use the GPIB SRQ line to request service.
• ppoll.c is the source code file for Example 8. It uses NI-488.2 routines to conduct
parallel polls.
• non_cic.c is the source code file for Example 9. It illustrates how you can use the
NI-488.2 driver in a non-Controller application.