393 lines
11 KiB
C
393 lines
11 KiB
C
/*************************************************************************\
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* Copyright (c) 2012 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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/* mbboDirectRecord.c - Record Support for mbboDirect records */
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/*
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* Original Author: Bob Dalesio
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* Date: 10-06-93
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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 "errlog.h"
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#include "alarm.h"
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#include "callback.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 "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 "special.h"
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#include "menuOmsl.h"
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#include "menuIvoa.h"
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#include "menuSimm.h"
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#define GEN_SIZE_OFFSET
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#include "mbboDirectRecord.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(struct dbCommon *, int);
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static long process(struct dbCommon *);
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static long special(DBADDR *, int);
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#define get_value NULL
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#define cvt_dbaddr NULL
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#define get_array_info NULL
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#define put_array_info NULL
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#define get_units NULL
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static long get_precision(const 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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#define get_graphic_double NULL
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#define get_control_double NULL
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#define get_alarm_double NULL
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rset mbboDirectRSET = {
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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, mbboDirectRSET);
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static void convert(mbboDirectRecord *);
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static void monitor(mbboDirectRecord *);
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static long writeValue(mbboDirectRecord *);
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#define NUM_BITS 32
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static
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void bitsFromVAL(mbboDirectRecord *prec)
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{
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unsigned i;
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for(i=0; i<NUM_BITS; i++)
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(&prec->b0)[i] = !!(prec->val&(1u<<i));
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}
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static long init_record(struct dbCommon *pcommon, int pass)
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{
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struct mbboDirectRecord *prec = (struct mbboDirectRecord *)pcommon;
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mbbodirectdset *pdset = (mbbodirectdset *) prec->dset;
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long status = 0;
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if (pass == 0) return 0;
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if (!pdset) {
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recGblRecordError(S_dev_noDSET, prec, "mbboDirect: init_record");
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return S_dev_noDSET;
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}
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if ((pdset->common.number < 5) || (pdset->write_mbbo == NULL)) {
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recGblRecordError(S_dev_missingSup, prec, "mbboDirect: init_record");
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return S_dev_missingSup;
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}
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recGblInitSimm(pcommon, &prec->sscn, &prec->oldsimm, &prec->simm, &prec->siml);
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if (recGblInitConstantLink(&prec->dol, DBF_ULONG, &prec->val))
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prec->udf = FALSE;
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/* Initialize MASK if the user set NOBT instead */
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if (prec->mask == 0 && prec->nobt <= 32)
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prec->mask = ((epicsUInt64) 1u << prec->nobt) - 1;
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if (pdset->common.init_record) {
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status = pdset->common.init_record(pcommon);
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if (status == 0) {
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/* Convert initial read-back */
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epicsUInt32 rval = prec->rval;
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if (prec->shft > 0)
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rval >>= prec->shft;
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prec->val = rval;
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prec->udf = FALSE;
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}
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else if (status == 2)
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status = 0;
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}
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if (!prec->udf)
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bitsFromVAL(prec);
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else {
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/* Did user set any of the B0-B1F fields? */
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epicsUInt8 *pBn = &prec->b0;
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epicsUInt32 val = 0, bit = 1;
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int i;
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for (i = 0; i < NUM_BITS; i++, bit <<= 1)
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if (*pBn++)
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val |= bit;
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if (val) { /* Yes! */
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prec->val = val;
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prec->udf = FALSE;
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}
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}
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prec->mlst = prec->val;
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prec->oraw = prec->rval;
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prec->orbv = prec->rbv;
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return status;
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}
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static long process(struct dbCommon *pcommon)
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{
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struct mbboDirectRecord *prec = (struct mbboDirectRecord *)pcommon;
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mbbodirectdset *pdset = (mbbodirectdset *)(prec->dset);
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long status = 0;
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int pact = prec->pact;
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if ((pdset == NULL) || (pdset->write_mbbo == NULL)) {
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prec->pact = TRUE;
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recGblRecordError(S_dev_missingSup, prec, "write_mbbo");
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return S_dev_missingSup;
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}
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if (!pact) {
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if (!dbLinkIsConstant(&prec->dol) &&
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prec->omsl == menuOmslclosed_loop) {
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epicsUInt32 val;
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if (dbGetLink(&prec->dol, DBR_ULONG, &val, 0, 0)) {
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recGblSetSevr(prec, LINK_ALARM, INVALID_ALARM);
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goto CONTINUE;
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}
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prec->val = val;
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}
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else if (prec->udf) {
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recGblSetSevrMsg(prec, UDF_ALARM, prec->udfs, "UDFS");
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goto CONTINUE;
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}
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prec->udf = FALSE;
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bitsFromVAL(prec);
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/* Convert VAL to RVAL */
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convert(prec);
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/* Update the timestamp before writing output values so it
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* will be up to date if any downstream records fetch it via TSEL */
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recGblGetTimeStampSimm(prec, prec->simm, NULL);
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}
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CONTINUE:
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if (prec->nsev < INVALID_ALARM)
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status = writeValue(prec);
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else {
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switch (prec->ivoa) {
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case menuIvoaSet_output_to_IVOV:
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if (!prec->pact) {
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prec->val = prec->ivov;
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convert(prec);
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}
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/* No break, fall through... */
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case menuIvoaContinue_normally:
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status = writeValue(prec);
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break;
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case menuIvoaDon_t_drive_outputs:
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break;
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default:
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status = -1;
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recGblRecordError(S_db_badField, prec,
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"mbboDirect: process Illegal IVOA field");
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}
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}
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/* Done if device support set PACT */
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if (!pact && prec->pact)
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return 0;
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prec->pact = TRUE;
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if ( pact ) {
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/* Update timestamp again for asynchronous devices */
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recGblGetTimeStampSimm(prec, prec->simm, NULL);
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}
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/* update bits to reflect any change made by dset */
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bitsFromVAL(prec);
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monitor(prec);
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/* Wrap up */
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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 special(DBADDR *paddr, int after)
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{
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mbboDirectRecord *prec = (mbboDirectRecord *) paddr->precord;
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int fieldIndex = dbGetFieldIndex(paddr);
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if (paddr->special == SPC_MOD && fieldIndex == mbboDirectRecordSIMM) {
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if (!after)
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recGblSaveSimm(prec->sscn, &prec->oldsimm, prec->simm);
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else
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recGblCheckSimm((dbCommon *)prec, &prec->sscn, prec->oldsimm, prec->simm);
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return 0;
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}
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if(after==0 && fieldIndex >= mbboDirectRecordB0 && fieldIndex <= mbboDirectRecordB1F) {
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if(prec->omsl == menuOmslclosed_loop) {
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/* To avoid confusion, reject changes to bit fields while in closed loop.
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* Not a 100% solution as confusion can still arise if dset overwrites VAL.
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*/
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return S_db_noMod;
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}
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} else if(after==1 && fieldIndex >= mbboDirectRecordB0 && fieldIndex <= mbboDirectRecordB1F) {
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/* Adjust VAL corresponding to the bit changed */
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epicsUInt8 *pBn = (epicsUInt8 *) paddr->pfield;
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epicsUInt32 bit = 1u << (pBn - &prec->b0);
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/* Because this is !(VAL and PP), dbPut() will always post a monitor on this B* field
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* after we return. We must keep track of this change separately from MLST to handle
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* situations where VAL and B* are changed prior to next monitor(). eg. by dset to
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* reflect bits actually written. This is the role of OBIT.
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*/
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if (*pBn) {
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prec->val |= bit;
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prec->obit |= bit;
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} else {
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prec->val &= ~bit;
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prec->obit &= ~bit;
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}
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prec->udf = FALSE;
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convert(prec);
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}
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return 0;
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}
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static long get_precision(const DBADDR *paddr,long *precision)
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{
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mbboDirectRecord *prec=(mbboDirectRecord *)paddr->precord;
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if(dbGetFieldIndex(paddr)==mbboDirectRecordVAL)
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*precision = prec->nobt;
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else
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recGblGetPrec(paddr,precision);
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return 0;
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}
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static void monitor(mbboDirectRecord *prec)
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{
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epicsUInt16 events = recGblResetAlarms(prec);
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if (prec->mlst != prec->val) {
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events |= DBE_VALUE | DBE_LOG;
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prec->mlst = prec->val;
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}
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if (events) {
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db_post_events(prec, &prec->val, events);
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}
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{
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unsigned i;
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epicsUInt32 bitsChanged = prec->obit ^ (epicsUInt32)prec->val;
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for(i=0; i<NUM_BITS; i++) {
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/* post bit when value or alarm severity changes */
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if((events&~(DBE_VALUE|DBE_LOG)) || (bitsChanged&(1u<<i))) {
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db_post_events(prec, (&prec->b0)+i, events | DBE_VALUE | DBE_LOG);
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}
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}
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prec->obit = prec->val;
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}
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events |= DBE_VALUE | DBE_LOG;
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if (prec->oraw != prec->rval) {
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db_post_events(prec, &prec->rval, events);
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prec->oraw = prec->rval;
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}
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if (prec->orbv != prec->rbv) {
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db_post_events(prec, &prec->rbv, events);
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prec->orbv = prec->rbv;
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}
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}
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static void convert(mbboDirectRecord *prec)
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{
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/* Convert VAL to RVAL */
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prec->rval = prec->val;
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if (prec->shft > 0)
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prec->rval <<= prec->shft;
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}
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static long writeValue(mbboDirectRecord *prec)
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{
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mbbodirectdset *pdset = (mbbodirectdset *) prec->dset;
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long status = 0;
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if (!prec->pact) {
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status = recGblGetSimm((dbCommon *)prec, &prec->sscn, &prec->oldsimm, &prec->simm, &prec->siml);
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if (status) return status;
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}
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switch (prec->simm) {
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case menuSimmNO:
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status = pdset->write_mbbo(prec);
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break;
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case menuSimmYES:
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case menuSimmRAW:
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recGblSetSevr(prec, SIMM_ALARM, prec->sims);
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if (prec->pact || (prec->sdly < 0.)) {
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if (prec->simm == menuSimmYES)
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status = dbPutLink(&prec->siol, DBR_LONG, &prec->val, 1);
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else /* prec->simm == menuSimmRAW */
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status = dbPutLink(&prec->siol, DBR_ULONG, &prec->rval, 1);
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prec->pact = FALSE;
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} else { /* !prec->pact && delay >= 0. */
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epicsCallback *pvt = prec->simpvt;
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if (!pvt) {
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pvt = calloc(1, sizeof(epicsCallback)); /* very lazy allocation of callback structure */
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prec->simpvt = pvt;
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}
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if (pvt) callbackRequestProcessCallbackDelayed(pvt, prec->prio, prec, prec->sdly);
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prec->pact = TRUE;
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}
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break;
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default:
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recGblSetSevr(prec, SOFT_ALARM, INVALID_ALARM);
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status = -1;
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}
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return status;
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}
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