Chapter 2 107
Programming Examples
RS-232 Programming Examples
50 ! PROGRAM DESCRIPTION: This program verifies that the RS-232 connections and
60 ! interface are functional.
70 !
80 ! Connect the UNIX workstation to the signal generator using an RS-232 cable
90 !
100 !
110 ! Run Agilent BASIC, type in the following commands and then RUN the program
120 !
130 !
140 !******************************************************************************
150 !
160 INTEGER Num
170 CONTROL 9,0;1 ! Resets the RS-232 interface
180 CONTROL 9,3;9600 ! Sets the baud rate to match the sig gen
190 STATUS 9,4;Stat ! Reads the value of register 4
200 Num=BINAND(Stat,7) ! Gets the AND value
210 CONTROL 9,4;Num ! Sets parity to NONE
220 OUTPUT 9;"*RST" ! Outputs reset to the sig gen
230 END ! End the program
Interface Check Using VISA and C
This program uses VISA library functions to communicate with the signal generator. The program verifies
that the RS-232 connections and interface are functional. In this example the COM2 port is used. The serial
port is referred to in the VISA library as ‘ASRL1’ or ‘ASRL2’ depending on the computer serial port you
are using. Launch Microsoft Visual C++, add the required files, and enter the following code into the .cpp
source file.
The following program example is available on the PSG Documentation CD-ROM as rs232ex1.cpp.
//****************************************************************************************
// PROGRAM NAME: rs232ex1.cpp
//
// PROGRAM DESCRIPTION: This code example uses the RS-232 serial interface to
// control the signal generator.
//
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