129 lines
3.1 KiB
C
129 lines
3.1 KiB
C
/* @(#)devAiSymb.c 1.1 6/4/93
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* Device Support for VxWorks Global Symbol Analog Input Records
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*
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*
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* Author: Carl Lionberger
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* Date: 060893
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*
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* Experimental Physics and Industrial Control System (EPICS)
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*
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* Copyright 1991, the Regents of the University of California,
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* and the University of Chicago Board of Governors.
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*
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* This software was produced under U.S. Government contracts:
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* (W-7405-ENG-36) at the Los Alamos National Laboratory,
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* and (W-31-109-ENG-38) at Argonne National Laboratory.
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*
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* Initial development by:
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* The Controls and Automation Group (AT-8)
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* Ground Test Accelerator
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* Accelerator Technology Division
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* Los Alamos National Laboratory
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*
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* Co-developed with
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* The Controls and Computing Group
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* Accelerator Systems Division
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* Advanced Photon Source
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* Argonne National Laboratory
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*
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* The Control Systems Group
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* Systems Engineering Department
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* Lawrence Berkeley Laboratory
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*
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* NOTES:
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* Derived from soft record device support.
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* Modification Log:
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* -----------------
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*/
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#include <vxWorks.h>
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#include <sysSymTbl.h>
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#include <types.h>
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#include <stdioLib.h>
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#include <string.h>
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#include <alarm.h>
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#include <cvtTable.h>
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#include <dbDefs.h>
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#include <dbAccess.h>
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#include <recSup.h>
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#include <devSup.h>
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#include <link.h>
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#include <aiRecord.h>
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/* Create the dset for devAiSymb */
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long init_record();
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long read_ai();
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struct {
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long number;
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DEVSUPFUN report;
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DEVSUPFUN init;
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DEVSUPFUN init_record;
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DEVSUPFUN get_ioint_info;
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DEVSUPFUN read_ai;
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DEVSUPFUN special_linconv;
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}devAiSymb={
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6,
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NULL,
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NULL,
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init_record,
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NULL,
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read_ai,
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NULL};
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double testd = 5.5;
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static long init_record(pai)
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/*
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Looks for record name in global symbol table. Strips off any
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prefix separated by a ":" before the lookup, to allow same variable
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name in multiple ioc's. Strips off suffixes separated by ";", to
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allow multiple references to same variable in an ioc.
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*/
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struct aiRecord *pai;
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{
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char *nptr, pname[29];
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SYM_TYPE stype;
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/* variable names from c have a prepended underscore */
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strcpy(pname,"_"); /* in case it is unprefixed */
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strcat(pname, pai->name);
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nptr = strrchr(pname, ';'); /* find any suffix and */
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if (nptr)
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*nptr = '\0'; /* terminate it. */
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nptr = strchr(pname, ':'); /* find any prefix and */
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if (nptr) /* bypass it */
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*nptr = '_'; /* overwrite : with _ */
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else
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nptr = pname;
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if (symFindByName(sysSymTbl, nptr, (char **)&pai->dpvt, &stype))
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{
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recGblRecordError(S_db_badField,(void *)pai,
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"devAiSymb (init_record) Illegal NAME field");
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return(S_db_badField);
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}
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pai->linr=0; /* prevent any conversions */
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return(0);
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}
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static long read_ai(pai)
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struct aiRecord *pai;
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{
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long status;
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if (pai->dpvt)
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{
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pai->val = *(double *)(pai->dpvt);
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status = 0;
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}
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else
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status = 1;
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if(RTN_SUCCESS(status)) pai->udf=FALSE;
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return(2); /*don't convert*/
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}
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