Andrew Johnson
96 lines
2.4 KiB
C
96 lines
2.4 KiB
C
/*************************************************************************\
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* Copyright (c) 2008 UChicago Argonne LLC, as Operator of Argonne
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* National Laboratory.
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* Copyright (c) 2002 The Regents of the University of California, as
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* Operator of Los Alamos National Laboratory.
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* SPDX-License-Identifier: EPICS
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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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/*
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* Original Authors: Bob Dalesio and Marty Kraimer
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* Date: 3/6/91
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "alarm.h"
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#include "dbDefs.h"
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#include "dbAccess.h"
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#include "epicsMath.h"
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#include "recGbl.h"
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#include "devSup.h"
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#include "aiRecord.h"
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#include "epicsExport.h"
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/* Create the dset for devAiSoft */
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static long init_record(dbCommon *pcommon);
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static long read_ai(aiRecord *prec);
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aidset devAiSoft = {
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{6, NULL, NULL, init_record, NULL},
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read_ai, NULL
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};
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epicsExportAddress(dset, devAiSoft);
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static long init_record(dbCommon *pcommon)
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{
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aiRecord *prec = (aiRecord *)pcommon;
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if (recGblInitConstantLink(&prec->inp, DBF_DOUBLE, &prec->val))
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prec->udf = FALSE;
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return 0;
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}
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struct aivt {
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double val;
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epicsTimeStamp *ptime;
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};
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static long readLocked(struct link *pinp, void *vvt)
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{
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struct aivt *pvt = (struct aivt *) vvt;
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long status = dbGetLink(pinp, DBR_DOUBLE, &pvt->val, 0, 0);
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if (!status && pvt->ptime)
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dbGetTimeStamp(pinp, pvt->ptime);
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return status;
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}
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static long read_ai(aiRecord *prec)
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{
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long status;
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struct aivt vt;
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if (dbLinkIsConstant(&prec->inp))
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return 2;
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vt.ptime = (dbLinkIsConstant(&prec->tsel) &&
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prec->tse == epicsTimeEventDeviceTime) ? &prec->time : NULL;
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status = dbLinkDoLocked(&prec->inp, readLocked, &vt);
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if (status == S_db_noLSET)
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status = readLocked(&prec->inp, &vt);
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if (!status) {
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/* Apply smoothing algorithm */
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if (prec->smoo != 0.0 && prec->dpvt && finite(prec->val))
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prec->val = vt.val * (1.0 - prec->smoo) + (prec->val * prec->smoo);
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else
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prec->val = vt.val;
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prec->udf = FALSE;
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prec->dpvt = &devAiSoft; /* Any non-zero value */
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return 2;
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}
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else
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prec->dpvt = NULL;
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return status;
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}
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