323 lines
8.5 KiB
C
323 lines
8.5 KiB
C
/*************************************************************************\
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* Copyright (c) 2002 Southeastern Universities Research Association, as
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* Operator of Thomas Jefferson National Accelerator Facility.
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* EPICS BASE is distributed subject to a Software License Agreement found
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* in file LICENSE that is included with this distribution.
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\*************************************************************************/
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/* recAai.c */
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/* recAai.c - Record Support Routines for Array Analog In records */
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/*
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* Original Author: Dave Barker
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*
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* C E B A F
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*
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* Continuous Electron Beam Accelerator Facility
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* Newport News, Virginia, USA.
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*
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* Copyright SURA CEBAF 1993.
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*
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* Current Author: Dirk Zimoch <dirk.zimoch@psi.ch>
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* Date: 27-MAY-2010
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*/
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#include <stddef.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <string.h>
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#include "dbDefs.h"
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#include "epicsPrint.h"
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#include "epicsString.h"
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#include "alarm.h"
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#include "dbAccess.h"
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#include "dbEvent.h"
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#include "dbFldTypes.h"
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#include "dbScan.h"
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#include "devSup.h"
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#include "errMdef.h"
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#include "recSup.h"
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#include "recGbl.h"
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#include "cantProceed.h"
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#include "menuYesNo.h"
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#define GEN_SIZE_OFFSET
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#include "aaiRecord.h"
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#undef GEN_SIZE_OFFSET
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#include "epicsExport.h"
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/* Create RSET - Record Support Entry Table*/
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#define report NULL
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#define initialize NULL
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static long init_record(aaiRecord *, int);
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static long process(aaiRecord *);
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#define special NULL
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#define get_value NULL
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static long cvt_dbaddr(DBADDR *);
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static long get_array_info(DBADDR *, long *, long *);
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static long put_array_info(DBADDR *, long);
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static long get_units(DBADDR *, char *);
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static long get_precision(DBADDR *, long *);
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#define get_enum_str NULL
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#define get_enum_strs NULL
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#define put_enum_str NULL
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static long get_graphic_double(DBADDR *, struct dbr_grDouble *);
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static long get_control_double(DBADDR *, struct dbr_ctrlDouble *);
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#define get_alarm_double NULL
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rset aaiRSET={
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RSETNUMBER,
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report,
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initialize,
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init_record,
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process,
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special,
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get_value,
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cvt_dbaddr,
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get_array_info,
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put_array_info,
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get_units,
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get_precision,
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get_enum_str,
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get_enum_strs,
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put_enum_str,
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get_graphic_double,
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get_control_double,
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get_alarm_double
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};
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epicsExportAddress(rset,aaiRSET);
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struct aaidset { /* aai dset */
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long number;
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DEVSUPFUN dev_report;
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DEVSUPFUN init;
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DEVSUPFUN init_record; /*returns: (-1,0)=>(failure,success)*/
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DEVSUPFUN get_ioint_info;
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DEVSUPFUN read_aai; /*returns: (-1,0)=>(failure,success)*/
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};
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static void monitor(aaiRecord *);
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static long readValue(aaiRecord *);
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static long init_record(aaiRecord *prec, int pass)
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{
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long status;
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struct aaidset *pdset = (struct aaidset *)(prec->dset);
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/* must have dset defined */
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if (!pdset) {
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recGblRecordError(S_dev_noDSET, prec, "aai: init_record");
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return S_dev_noDSET;
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}
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if (pass == 0) {
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if (prec->nelm <= 0)
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prec->nelm = 1;
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if (prec->ftvl > DBF_ENUM)
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prec->ftvl = DBF_UCHAR;
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if (prec->nelm == 1) {
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prec->nord = 1;
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} else {
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prec->nord = 0;
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}
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/* we must call pdset->init_record in pass 0
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because it may set prec->bptr which must
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not change after links are established before pass 1
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*/
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if (pdset->init_record) {
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/* init_record may set the bptr to point to the data */
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if ((status = pdset->init_record(prec)))
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return status;
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}
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if (!prec->bptr) {
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/* device support did not allocate memory so we must do it */
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prec->bptr = callocMustSucceed(prec->nelm, dbValueSize(prec->ftvl),
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"aai: buffer calloc failed");
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}
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return 0;
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}
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/* SIML must be a CONSTANT or a PV_LINK or a DB_LINK */
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if (prec->siml.type == CONSTANT) {
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recGblInitConstantLink(&prec->siml,DBF_USHORT,&prec->simm);
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}
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/* must have read_aai function defined */
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if (pdset->number < 5 || pdset->read_aai == NULL) {
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recGblRecordError(S_dev_missingSup, prec, "aai: init_record");
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return S_dev_missingSup;
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}
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return 0;
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}
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static long process(aaiRecord *prec)
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{
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struct aaidset *pdset = (struct aaidset *)(prec->dset);
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long status;
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unsigned char pact = prec->pact;
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if (pdset == NULL || pdset->read_aai == NULL) {
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prec->pact = TRUE;
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recGblRecordError(S_dev_missingSup, prec, "read_aai");
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return S_dev_missingSup;
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}
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status = readValue(prec); /* read the new value */
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if (!pact && prec->pact) return 0;
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prec->pact = TRUE;
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prec->udf = FALSE;
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recGblGetTimeStamp(prec);
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monitor(prec);
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/* process the forward scan link record */
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recGblFwdLink(prec);
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prec->pact = FALSE;
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return status;
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}
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static long cvt_dbaddr(DBADDR *paddr)
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{
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aaiRecord *prec = (aaiRecord *)paddr->precord;
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paddr->pfield = prec->bptr;
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paddr->no_elements = prec->nelm;
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paddr->field_type = prec->ftvl;
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paddr->field_size = dbValueSize(prec->ftvl);
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paddr->dbr_field_type = prec->ftvl;
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return 0;
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}
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static long get_array_info(DBADDR *paddr, long *no_elements, long *offset)
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{
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aaiRecord *prec = (aaiRecord *)paddr->precord;
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*no_elements = prec->nord;
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*offset = 0;
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return 0;
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}
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static long put_array_info(DBADDR *paddr, long nNew)
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{
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aaiRecord *prec = (aaiRecord *)paddr->precord;
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prec->nord = nNew;
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if (prec->nord > prec->nelm)
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prec->nord = prec->nelm;
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return 0;
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}
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static long get_units(DBADDR *paddr, char *units)
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{
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aaiRecord *prec = (aaiRecord *)paddr->precord;
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strncpy(units, prec->egu, DB_UNITS_SIZE);
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return 0;
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}
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static long get_precision(DBADDR *paddr, long *precision)
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{
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aaiRecord *prec = (aaiRecord *)paddr->precord;
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*precision = prec->prec;
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if (paddr->pfield == prec->bptr) return 0;
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recGblGetPrec(paddr, precision);
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return 0;
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}
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static long get_graphic_double(DBADDR *paddr, struct dbr_grDouble *pgd)
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{
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aaiRecord *prec = (aaiRecord *)paddr->precord;
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if (paddr->pfield == prec->bptr) {
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pgd->upper_disp_limit = prec->hopr;
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pgd->lower_disp_limit = prec->lopr;
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} else recGblGetGraphicDouble(paddr, pgd);
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return 0;
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}
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static long get_control_double(DBADDR *paddr, struct dbr_ctrlDouble *pcd)
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{
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aaiRecord *prec = (aaiRecord *)paddr->precord;
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if (paddr->pfield == prec->bptr) {
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pcd->upper_ctrl_limit = prec->hopr;
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pcd->lower_ctrl_limit = prec->lopr;
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} else recGblGetControlDouble(paddr, pcd);
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return 0;
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}
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static void monitor(aaiRecord *prec)
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{
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unsigned short monitor_mask;
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unsigned int hash = 0;
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monitor_mask = recGblResetAlarms(prec);
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if (prec->mpst == aaiPOST_Always)
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monitor_mask |= DBE_VALUE;
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if (prec->apst == aaiPOST_Always)
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monitor_mask |= DBE_LOG;
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/* Calculate hash if we are interested in OnChange events. */
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if ((prec->mpst == aaiPOST_OnChange) ||
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(prec->apst == aaiPOST_OnChange)) {
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hash = epicsMemHash(prec->bptr,
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prec->nord * dbValueSize(prec->ftvl), 0);
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/* Only post OnChange values if the hash is different. */
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if (hash != prec->hash) {
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if (prec->mpst == aaiPOST_OnChange)
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monitor_mask |= DBE_VALUE;
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if (prec->apst == aaiPOST_OnChange)
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monitor_mask |= DBE_LOG;
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/* Store hash for next process. */
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prec->hash = hash;
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/* Post HASH. */
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db_post_events(prec, &prec->hash, DBE_VALUE);
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}
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}
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if (monitor_mask)
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db_post_events(prec, prec->bptr, monitor_mask);
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}
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static long readValue(aaiRecord *prec)
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{
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long status;
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struct aaidset *pdset = (struct aaidset *)prec->dset;
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if (prec->pact == TRUE){
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status = pdset->read_aai(prec);
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return status;
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}
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status = dbGetLink(&prec->siml, DBR_ENUM, &prec->simm, 0, 0);
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if (status)
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return status;
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if (prec->simm == menuYesNoNO){
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return pdset->read_aai(prec);
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}
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if (prec->simm == menuYesNoYES){
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/* Device suport is responsible for buffer
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which might be read-only so we may not be
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allowed to call dbGetLink on it.
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Maybe also device support has an advanced
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simulation mode.
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Thus call device now.
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*/
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recGblSetSevr(prec, SIMM_ALARM, prec->sims);
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return pdset->read_aai(prec);
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}
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recGblSetSevr(prec, SOFT_ALARM, INVALID_ALARM);
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return -1;
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}
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