Agilent Technologies 34420A, User Manual

Page: 233 / 294

C / HP-IB Example 1
This example demonstrates the general sequence of programming and
the use of the MEASure? command to set and obtain a 4-wire Ohms
measurement.
/***************************************************************************
This program configures the meter for a 4-wire ohms measurement on
Channel 1 using the MEAS command.
***************************************************************************/
#include <stdio.h> /* Used for printf() */
#include <stdlib.h> /* Used for atoi() */
#include <string.h> /* Used for strlen() */
#include <cfunc.h> /* Header file from GPIB Command Library */
#define ADDR 722L /* Set GPIB address for meter */
/* Function Prototypes */
void rst_clear(void);
void meter_meas(void);
void check_error(char *func_name);
/**************************************************************************/
void main(void) /* Start of main() */
{
rst_clear(); /* Reset the instrument and clear error queue */
meter_meas(); /* Set up meter for measurement */
}
/**************************************************************************/
void rst_clear(void)
{
/* Reset the meter, clear the error queue, and wait for commands to
complete. A "1" is sent to the output buffer from the *OPC? command
when *RST and *CLS are completed. */
float value;
IOOUTPUTS(ADDR, "*RST;*CLS;*OPC?", 15);
IOENTER(ADDR, &value);
}
6
Chapter 6 Application Programs
C Language Programs
233
GPIB