154 N9310A User’s Guide
6 Subsystem Command Reference
Example 1 - Checking USB Connection
Usually, using “*IDN?” verifies the data transferring
between the controller PC and the instrument.
****************************************************
#include "visa.h"
#include <studio.h>
#define BufferSize 128
static Vistatus status;
static ViSession defaultRM;
static ViSession inst_N9310A;
static ViUInt32 rcount;
static unsigned char buffer[BufferSize];
int main(void)
{
/* Connect N9310A and read its “IDN”. */
status = viOpen (defaultRM,
“USB0::2391::8216::0115000001::0::INSTR”,
VI_NULL, VI_NULL, &inst_N9310A);
if (STATUS != VI_SUCCESS);
return -1; //failed to connect N9310A
/* Read “IDN” from N9310A” */
status = viWrite (inst_N9310A, “*RST\n”,
StringLength(“*RST\n), &rcount);
status = viWrite (inst_N9310A, “*IDN?\n”,
StringLength(“*IDN?\n”), &rcount);
status = viRead (inst_N9310A, buffer,
BufferSize, &rcount);
/* Close connection to N9310A. */
status = viClose (inst_N9310A);
status = viClose (defaultRM); return 1;
}
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