Programming Examples 9
Agilent InfiniiVision 5000 Series Oscilloscopes Programmer's Reference 559
VISA Example in C
/*
* Agilent VISA Example in C
* ------------------------------------------------------------------
* This program illustrates most of the commonly-used programming
* features of your Agilent oscilloscope.
* This program is to be built as a WIN32 console application.
* Edit the RESOURCE line to specify the address of the
* applicable device.
*/
#include <stdio.h> /* For printf(). */
#include <visa.h> /* Agilent VISA routines. */
/* GPIB */
/* #define RESOURCE "GPIB0::7::INSTR" */
/* LAN */
/* #define RESOURCE "TCPIP0::a-mso6102-90541::inst0::INSTR" */
/* USB */
#define RESOURCE "USB0::2391::5970::30D3090541::0::INSTR"
#define WAVE_DATA_SIZE 5000
#define TIMEOUT 5000
#define SETUP_STR_SIZE 3000
#define IMG_SIZE 300000
/* Function prototypes */
void initialize(void); /* Initialize the oscilloscope. */
void extra(void); /* Miscellaneous commands not executed,
shown for reference purposes. */
void capture(void); /* Digitize data from oscilloscope. */
void analyze(void); /* Make some measurements. */
void get_waveform(void); /* Download waveform data from
oscilloscope. */
void save_waveform(void); /* Save waveform data to a file. */
void retrieve_waveform(void); /* Load waveform data from a file. */
/* Global variables */
ViSession defaultRM, vi; /* Device session ID. */
char buf[256]={0}; /*Buffer for IDN string. */
unsigned char waveform_data[WAVE_DATA_SIZE]; /* Array for waveform
data. */
double preamble[10]; /* Array for preamble. */
void main(void)
{
/* Open session. */
viOpenDefaultRM(&defaultRM);
viOpen(defaultRM, RESOURCE, VI_NULL,VI_NULL, &vi);
printf ("Oscilloscope session initialized!\n");