153 lines
3.6 KiB
C
153 lines
3.6 KiB
C
/* devAiTestAsyn.c */
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/* share/src/dev $Id$ */
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/* devAiTestAsyn.c - Device Support Routines for testing asynchronous processing*/
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/*
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* Original Author: Bob Dalesio
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* Current Author: Marty Kraimer
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* Date: 6-1-90
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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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* Modification Log:
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* -----------------
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* ...
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*/
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#include <vxWorks.h>
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#include <types.h>
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#include <stdioLib.h>
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#include <wdLib.h>
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#include <alarm.h>
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#include <callback.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 devAiTestAsyn */
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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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}devAiTestAsyn={
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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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/* control block for callback*/
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struct callback {
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void (*callback)();
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int priority;
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struct dbCommon *prec;
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WDOG_ID wd_id;
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};
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void callbackRequest();
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static void myCallback(pcallback)
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struct callback *pcallback;
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{
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struct aiRecord *pai=(struct aiRecord *)(pcallback->prec);
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struct rset *prset=(struct rset *)(pai->rset);
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dbScanLock(pai);
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(*prset->process)(pai->pdba);
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dbScanUnlock(pai);
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}
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static long init_record(pai)
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struct aiRecord *pai;
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{
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char message[100];
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struct callback *pcallback;
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/* ai.inp must be a CONSTANT*/
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switch (pai->inp.type) {
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case (CONSTANT) :
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pcallback = (struct callback *)(calloc(1,sizeof(struct callback)));
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pai->dpvt = (caddr_t)pcallback;
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pcallback->callback = myCallback;
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pcallback->priority = priorityLow;
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pcallback->prec = (struct dbCommon *)pai;
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pcallback->wd_id = wdCreate();
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pai->val = pai->inp.value.value;
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pai->udf = FALSE;
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break;
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default :
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strcpy(message,pai->name);
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strcat(message,": devAiTestAsyn (init_record) Illegal INP field");
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errMessage(S_db_badField,message);
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return(S_db_badField);
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}
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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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char message[100];
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long status,options,nRequest;
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struct callback *pcallback=(struct callback *)(pai->dpvt);
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int wait_time;
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/* ai.inp must be a CONSTANT*/
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switch (pai->inp.type) {
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case (CONSTANT) :
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if(pai->pact) {
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printf("%s Completed\n",pai->name);
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return(2); /* don`t convert*/
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} else {
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wait_time = (int)(pai->disv * vxTicksPerSecond);
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if(wait_time<=0) return(0);
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printf("%s Starting asynchronous processing\n",pai->name);
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wdStart(pcallback->wd_id,wait_time,callbackRequest,(int)pcallback);
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return(1);
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}
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default :
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if(recGblSetSevr(pai,SOFT_ALARM,VALID_ALARM)){
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if(pai->stat!=SOFT_ALARM) {
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strcpy(message,pai->name);
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strcat(message,": devAiTestAsyn (read_ai) Illegal INP field");
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errMessage(S_db_badField,message);
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}
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}
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}
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return(0);
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}
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