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8163A/B, 8164A/B & 8166A/B Mainframes Programming Guide
6
VISA Programming Examples
How to Set up a Fixed Laser Source
This example sets up a fixed laser source.
Install a Laser Source in Slot 2, before executing this example.
#include <stdio.h>
#include <stdlib.h>
#include <visa.h>
/* function prototypes for this examples */
/* function for simple error handling explained in example 1
*/
void checkError(ViSession session, ViStatus err_status );
void main (void)
{
ViStatus errStatus; /* returned error code from
visa call */
ViSession defaultRM; /* default visa resource
manager variable*/
ViSession vi; /* current session handle */
ViChar c; /* used in the keyboard wait
loop */
ViReal32 wavelength; /* wavelength of the laser
source */
/* initialize the visa library (see example 1) */
errStatus = viOpenDefaultRM (&defaultRM);
if(errStatus < VI_SUCCESS)
{
printf("Failed to open VISA Resource manager\n");
exit(errStatus);
}
/* Open session to GPIB device at address 20;*/
errStatus = viOpen (defaultRM, "GPIB::20::INSTR",
VI_NULL,VI_NULL,&vi);
if(errStatus < VI_SUCCESS)
{
printf("Failed to open instrument\n");
exit(errStatus);
}
