842 Keysight InfiniiVision DSOX1204A/G Oscilloscopes Programmer's Guide
36 Programming Examples
/*
* Keysight VISA Example in C
* ------------------------------------------------------------------
* This program illustrates a few commonly-used programming
* features of your Keysight oscilloscope.
*/
#include <stdio.h> /* For printf(). */
#include <string.h> /* For strcpy(), strcat(). */
#include <time.h> /* For clock(). */
#include <visa.h> /* Keysight VISA routines. */
#define VISA_ADDRESS "USB0::0x0957::0x17A6::US50210029::0::INSTR"
#define IEEEBLOCK_SPACE 5000000
/* Function prototypes */
void initialize(void); /* Initialize to known state. */
void capture(void); /* Capture the waveform. */
void analyze(void); /* Analyze the captured waveform. */
void do_command(char *command); /* Send command. */
int do_command_ieeeblock(char *command); /* Command w/IEEE block. */
void do_query_string(char *query); /* Query for string. */
void do_query_number(char *query); /* Query for number. */
void do_query_numbers(char *query); /* Query for numbers. */
int do_query_ieeeblock(char *query); /* Query for IEEE block. */
void check_instrument_errors(); /* Check for inst errors. */
void error_handler(); /* VISA error handler. */
/* Global variables */
ViSession defaultRM, vi; /* Device session ID. */
ViStatus err; /* VISA function return value. */
char str_result[256] = {0}; /* Result from do_query_string(). */
double num_result; /* Result from do_query_number(). */
unsigned char ieeeblock_data[IEEEBLOCK_SPACE]; /* Result from
do_query_ieeeblock(). */
double dbl_results[10]; /* Result from do_query_numbers(). */
/* Main Program
* --------------------------------------------------------------- */
void main(void)
{
/* Open the default resource manager session. */
err = viOpenDefaultRM(&defaultRM);
if (err != VI_SUCCESS) error_handler();
/* Open the session using the oscilloscope's VISA address. */
err = viOpen(defaultRM, VISA_ADDRESS, VI_NULL, VI_NULL, &vi);
if (err != VI_SUCCESS) error_handler();
/* Set the I/O timeout to fifteen seconds. */
err = viSetAttribute(vi, VI_ATTR_TMO_VALUE, 15000);
if (err != VI_SUCCESS) error_handler();
/* Initialize - start from a known state. */
initialize();
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