Experimental Physics and
Industrial Control System

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<== Date ==>		<== Thread ==>

Subject:	Two EVR in one VME
From:	Di Wang via Tech-talk <[email protected]>
To:	[email protected]
Date:	Tue, 19 Feb 2019 16:11:40 +0900

Hi everyone,

I have some problems when listening to two EVR in one VME. I want to read EVR event respectively and storage them in two waveform record. So I used the method which described in this link
https://epics.anl.gov/tech-talk/2008/msg00241.php

Basically, my records is like this:

record(longout,         "$(P):event$(EvtNum)"){
        field(DESC,     "Event $(EvtNum)")
        field(SCAN,     "I/O Intr")
        field(TSE,      "-2")
        field(DTYP,     "EVR Event")
        field(VAL,      "$(EvtNum)")
        field(OUT,      "@OBJ=$(OBJ),Code=$(EvtNum)")
        field(FLNK,     "$(P):SvEvt$(EvtNum)")
}

record(longout,         "$(P):SvEvt$(EvtNum)") {
        field(SCAN,     "Passive")
        field(VAL,      "$(EvtNum)")
        field(OMSL,     "closed_loop")
        field(DOL,      "$(P):event$(EvtNum)")
        field(OUT,      "$(P):EventCode PP")
}

record(longin,          "$(P):EventCode"){
        field(DESC,     "EPICS Event Code Received")
        field(SCAN,     "Passive")
        field(VAL,      "0")
        field(FLNK,     "$(P):Event-Wf")
}

"$(P):Event-Wf" is the target waveform record which I rewrite the device support to storage numbers of event and its INP field points to "$(P):EventCode". When I only use one EVR, the program goes good, the records in IOC is kind of like this:
test:evr1:event1
test:evr1:SvEvt1
test:evr1:event2
test:evr1:SvEvt2
......(many other event numbers)
test:evr1:EventCode
test:evr1:Event-Wf

But when I test two EVR, both test:evr1:Event-Wf and test:evr2:Event-Wf will receive the same event twice. For example, in test:evr1:Event-Wf, the event number is like this: event "38" is received twice and event "19" is not supposed to received by evr1. But when I monitored the value of test:evr1:EventCode and test:evr2:EventCode, their value is correct and received the event sequence which they should received. It is very weird.
I do not know if there is some wrong with my waveform device support but since EventCode record can separate different EVR why Event-Wf record receives two EVR's event?
...38 36 37 2 1 35 32 33 184 181 180 19 15 38 36 37 2 1 35 32 33 184 181 180...

EPICS base version is 3.15.5, IOC is compiled in Linux and run on VxWorks, mrfioc2-2.2.0, EVRs are EVR-230-RF
mrmEvrSetupVME("tstevr1", 3, 0x08000000, 5, 0xc0)
mrmEvrSetupVME("tstevr2", 5, 0x08040000, 7, 0xc1)

Sorry for my terrible typesetting.
-----
Di Wang <[email protected]>
High Energy Accelerator Research Organization (KEK), Japan

Replies:: Re: Two EVR in one VME Michael Davidsaver via Tech-talk

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ANJ, 19 Feb 2019

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System