formatio c

/*formatio.c

  This example program makes a multimeter measurement with a comma

  separated list passed with formatted I/O and prints the results.

  Note that you must change the device address. */

 

#include <visa.h>

#include <stdio.h>

 

void main () {

 

  ViSession defaultRM, vi;

  double res;

  double list [2] = {1,0.001};

 

  /* Open session to GPIB device at address 22 */

  viOpenDefaultRM (&defaultRM);

  viOpen (defaultRM, "GPIB0::22::INSTR", VI_NULL,VI_NULL, &vi);

 

  /* Initialize device */

  viPrintf (vi, "*RST\n");

 

  /* Set up device and send comma separated list */

  viPrintf (vi, "CALC:DBM:REF 50\n");

  viPrintf (vi, "MEAS:VOLT:AC? %,2f\n", list);

 

  /* Read results */

  viScanf (vi, "%lf", &res);

 

  /* Print results */

  printf ("Mesurement Results: %lf\n", res);

 

  /* Close session */

  viClose (vi);

  viClose (defaultRM);

}