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30 Using the HP E1459A Module
Power-on / Reset States
At power-on or reset (*RST) the HP E1459A is set to the following
conditions:
• Watchdog timer is off (disabled).
• Clock Source is Internal
• Input Debounce Time is 18.0 µS.
• DAV (Data Available) Event interrupts are disabled for all ports.
• Edge Event interrupts are disabled for all ports.
Also, refer to the
STATus:PRESet command in Chapter 3.
Example 1:
Reset, Self Test,
and Module ID
This first example resets the HP E1459A, performs the module self test, and
reads the module ID and description.
/* Self Test
This program resets the HP E1459A, performs a Self Test,
and reads the ID string
Created in Microsoft Visual C++ */
#include <visa.h>
#include <stdio.h>
#include <stdlib.h>
#define INSTR_ADDR "GPIB0::9::3::INSTR"
/* HP E1459A logical address */
int main()
{
ViStatus errStatus;
/* status from VISA call */
ViSession viRM;
/* Resource Mgr. session */
ViSession E1459;
/* session for HP E1459A */
char id_string [256] = {0};
/* ID string buffer */
char selftst_string[256] = {0};
/*
Open a default Resource Manager
*/
errStatus = viOpenDefaultRM (&viRM);
if (VI_SUCCESS > errStatus){
printf("ERROR: viOpen() returned 0x%x\n",errStatus);
return errStatus;}
/*
Open the Instrument Session
*/
errStatus = viOpen (viRM, INSTR_ADDR,VI_NULL,VI_NULL, &E1459);
if (VI_SUCCESS > errStatus){
printf("ERROR: viOpen() returned 0x%x\n",errStatus);
return errStatus;}
/*
Reset the E1459A
*/
errStatus = viPrintf (E1459, "*RST;*CLS\n");
if (VI_SUCCESS > errStatus){
printf("ERROR: viPrintf() returned 0x%x\n",errStatus);
return errStatus;}