National Instruments 320682C Chapter 5 RS-232 Library

Chapter 5RS-232 Library

This chapter describes the functions in the LabWindows/CVI RS-232 Library. The RS-232

Library Function Overview section contains general information about the RS-232 Library

functions and panels. The RS-232 Library Function Reference section contains an alphabetical

list of function descriptions.

In order to use the RS-232 Library on UNIX, your UNIX kernel must support asynchronous I/O

functions (for example, aioread and aiowrite). You can enable this by building your

UNIX kernel as Generic instead of Generic Small.

This section contains general information about the RS-232 Library functions and panels. The

RS-232 Library can also be used with a National Instruments RS-485 serial board.

The RS-232 Library function panels are grouped in a tree structure according to the types of

operations performed. The RS-232 Library function tree appears in Table 5-1.

The first- and second-level bold headings in the tree are the names of function classes and

subclasses. Function classes and subclasses are groups of related function panels. The third-

level headings in plain text are the names of individual function panels. Each RS-232 function

panel generates one or more RS-232 function calls. The names of functions are in bold italics to

the right of the function panel name.

Table 5-1. The RS-232 Library Function Tree

RS-232

Open/Close

Open COM and Configure OpenComConfig

Close COM CloseCom

Open COM—Current State OpenCom

Input/Output

Read Buffer ComRd

Read Terminated Buffer ComRdTerm

Read Byte ComRdByte

(continues)