Experimental Physics and
Industrial Control System

"Szalata, Zenon M." <[email protected]> · Wed, 24 Oct 2007 20:26:20 -0700

I am learning to use stream device to implement a soft IOC to control an Agilent 33220A waveform generator, which is attached to an ICS 8065 Ethernet-GPIB controller.  I have a very simple program at this point.  It consists of two records: ai and ao and a very simple protocol file.  I am unable to use the @init{} command/handler.  Without the @init{} commented out the program works as it should.  But when I uncomment either of the two @init{} statements an error results. Here is the output:
------------------------------
zms@esaux1 $ ../../bin/linux-x86/atest st.cmd
#!../../bin/linux-x86/atest
< envPaths
epicsEnvSet(ARCH,"linux-x86")
epicsEnvSet(IOC,"iocagwfg")
epicsEnvSet(TOP,"/afs/slac.stanford.edu/g/esa/ilc/epics/iocTop/atest")
epicsEnvSet(ASYN,"/afs/slac/g/esa/ilc/epics/modules/asyn/4-9")
epicsEnvSet(STRM,"/afs/slac/g/esa/ilc/epics/modules/streamdevice-2-3")
epicsEnvSet(EPICS_BASE,"/afs/slac/g/esa/ilc/epics/base/R3-14-9-ilc1")
epicsEnvSet( "STREAM_PROTOCOL_PATH","../../atestApp/Db:.")
cd /afs/slac.stanford.edu/g/esa/ilc/epics/iocTop/atest
## Register all support components
dbLoadDatabase("dbd/atest.dbd",0,0)
atest_registerRecordDeviceDriver(pdbbase)
vxi11Configure( "L0","134.79.64.25",0,0.0,"gpib0",0,0)
dbLoadRecords("db/atest.db","P=AG:")
cd /afs/slac.stanford.edu/g/esa/ilc/epics/iocTop/atest/iocBoot/iocagwfg
iocInit()
Starting iocInit
############################################################################
## EPICS R3.14.9-lcls1 $R3-14-9$ $2007/02/05 16:31:45$
## EPICS Base built Oct  2 2007
############################################################################
2007/10/24 18:21:44.742 L0 port not connected
2007/10/24 18:21:45.307 AG:RFreq: asynError in write: L0 port is not connected

2007/10/24 18:21:45.308 AG:RFreq: @init handler failed
2007/10/24 18:21:45.308 AG:RFreq: Record initialization failed
2007/10/24 18:21:45.308 AG:WFreq: asynError in write: L0 port is not connected

2007/10/24 18:21:45.308 AG:WFreq: @init handler failed
2007/10/24 18:21:45.308 AG:WFreq: Record initialization failed
Bad init_rec return value  PV: AG:WFreq ao: init_record
iocInit: All initialization complete
epics> exit
---------------------------------
Here is my atest.db:

---------------------------------
record( ai,"$(P)RFreq"){
  field( DESC, "read frequency")
  field( DTYP, "stream")
  field( SCAN, "10 second")
  field( PREC, "2")
  field( EGU,  "Hz")
  field( INP,  "@atest.proto rFreq L0 8")
}
record( ao,"$(P)WFreq"){
  field( DESC, "write frequency")
  field( DTYP, "stream")
  field( SCAN, "Passive")
  field( PREC, "2")
  field( EGU,  "Hz")
  field( OUT,  "@atest.proto wFreq L0 8")
}
---------------------------------

And atest.proto, shown here with both @init statements commented out:

---------------------------------
# file: atest.proto

Terminator=LF;

#@init{ out " ";}

rFreq{
 out "FREQ?"; in "%f";
}
wFreq{
 out "FREQ %f";
# @init{ rFreq;}
}
-----------------------------------

Also here is atestApp/src/Makefile

-----------------------------------
TOP=../..

include $(TOP)/configure/CONFIG
#----------------------------------------
#  ADD MACRO DEFINITIONS AFTER THIS LINE
#=============================

#=============================
# build an ioc application

PROD_IOC = atest

DBD += atest.dbd
# atest.dbd will be made up from these files:
atest_DBD += base.dbd
atest_DBD += atestSup.dbd
atest_DBD += stream.dbd
atest_DBD += asyn.dbd
atest_DBD += drvVxi11.dbd

# <name>_registerRecordDeviceDriver.cpp will be created from <name>.dbd
atest_SRCS += atest_registerRecordDeviceDriver.cpp
atest_SRCS_DEFAULT += atestMain.cpp
atest_SRCS_vxWorks += -nil-

#The following adds support from base/src/vxWorks
atest_OBJS_vxWorks += $(EPICS_BASE_BIN)/vxComLibrary

#add a definition for each support application used by this application
atest_LIBS += asyn
atest_LIBS += stream
#atest_LIBS += genSub
#atest_LIBS += calc

atest_LIBS += $(EPICS_BASE_IOC_LIBS)

#----------------------------------------
include $(TOP)/configure/RULES
#----------------------------------------
#  ADD RULES AFTER THIS LINE
------------------------------------------

And contents of my atestSup.dbd:

------------------------------------------
registrar( drvAsynIPPortRegisterCommands)
------------------------------------------

When the @init statements are commented out, this is what I get:

-------------------------------------------
#!../../bin/linux-x86/atest
< envPaths
epicsEnvSet(ARCH,"linux-x86")
epicsEnvSet(IOC,"iocagwfg")
epicsEnvSet(TOP,"/afs/slac.stanford.edu/g/esa/ilc/epics/iocTop/atest")
epicsEnvSet(ASYN,"/afs/slac/g/esa/ilc/epics/modules/asyn/4-9")
epicsEnvSet(STRM,"/afs/slac/g/esa/ilc/epics/modules/streamdevice-2-3")
epicsEnvSet(EPICS_BASE,"/afs/slac/g/esa/ilc/epics/base/R3-14-9-ilc1")
epicsEnvSet( "STREAM_PROTOCOL_PATH","../../atestApp/Db:.")
cd /afs/slac.stanford.edu/g/esa/ilc/epics/iocTop/atest
## Register all support components
dbLoadDatabase("dbd/atest.dbd",0,0)
atest_registerRecordDeviceDriver(pdbbase)
vxi11Configure( "L0","134.79.64.25",0,0.0,"gpib0",0,0)
dbLoadRecords("db/atest.db","P=AG:")
cd /afs/slac.stanford.edu/g/esa/ilc/epics/iocTop/atest/iocBoot/iocagwfg
iocInit()
Starting iocInit
############################################################################
## EPICS R3.14.9-lcls1 $R3-14-9$ $2007/02/05 16:31:45$
## EPICS Base built Oct  2 2007
############################################################################
iocInit: All initialization complete
epics> dbl
AG:RFreq
AG:WFreq
epics>
-------------------------------------------
And I can examine the value read in a very simple edm screen.

Sorry for such a lengthy note.  Thanks for helping,
Zen

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System