landev.c

HP GPIB的VB和C语言库文件,参考范例.

/* landev.c 
   This example program sends a scan list to a switch and while
   looping closes channels and takes measurements. */
#include <sicl.h>
#include <stdio.h>

main()
{
  INST dvm;
  INST sw;

  double res;
  int i;

  /* Print message and terminate on error */
  ionerror (I_ERROR_EXIT);

  /* Open the multimeter and switch sessions */
  dvm = iopen ("lan[instserv]:hpib,9,3");
  sw = iopen ("lan[instserv]:hpib,9,14");
  itimeout (dvm, 10000);
  itimeout (sw, 10000);

  /*Set up trigger*/
  iprintf (sw, "TRIG:SOUR BUS\n");

  /*Set up scan list*/
  iprintf (sw,"SCAN (@100:103)\n");
  iprintf (sw,"INIT\n");

  for (i=1;i<=4;i++)
  {
    /* Take a measurement */
    iprintf (dvm,"MEAS:VOLT:DC?\n");

    /* Read the results */
    iscanf (dvm,"%lf", &res);

    /* Print the results */
    printf ("Result is %f\n",res);
  
    /*Trigger to close channel*/
    iprintf (sw, "TRIG\n");
  }
  /* Close the multimeter and switch sessions */
  iclose (dvm);
  iclose (sw);

/* For WIN16 programs, call _siclcleanup before exiting to release
   resources allocated by SICL for this application.  This call
   is a no-op for WIN32 programs. */
  _siclcleanup();

  return 0;
}