def checkName(name):
"""usage: checkName("xxx:m1.VAL")"""
if not cadict.has_key(name):
# Make a new entry in the PV-name dictionary
channel = CaChannel()
try:
channel.searchw(name)
except CaChannelException, status:
print "checkName: CaChannel exception, status=", status
raise CaChannelException, status
return
cadict[name] = [channel, 0] # [channel, callback_flag]
def checkName(name, timeout=None, retries=None):
"""
usage: checkName("xxx:m1.VAL", timeout=None, retries=None)
Intended for internal use by ca_util functions.
"""
global cadict, defaultTimeout, defaultRetries
if not name:
raise ca_utilException, EXCEPTION_NULL_NAME
return
if ((timeout == None) and (defaultTimeout != None)): timeout = defaultTimeout
if (timeout == "NONE"): timeout = None
if ((retries == None) and (defaultRetries != None)): retries = defaultRetries
if ((retries == None) or (retries == "NONE")): retries = 0
tries = 0
while (not cadict.has_key(name)) and (tries <= retries):
# Make a new entry in the PV-name dictionary
try:
channel = CaChannel.CaChannel()
if (timeout != None): channel.setTimeout(timeout)
channel.searchw(name)
cadict[name] = cadictEntry(channel)
except CaChannel.CaChannelException, status:
del channel
tries += 1
def reconnect(self):
try:
self.chan=CaChannel()
self.chan.search(self.pvName)
self.chan.pend_io()
if (self.chan.element_count()<1):
self.rPrint("No channels named "+self.pvName+" found, is the SoftIOC running?")
self.connected=(self.chan.state()==ca.ch_state.cs_conn)
self.chan.add_masked_array_event(ca.DBR_STRING,1,ca.DBE_ALARM | ca.DBE_VALUE,self.alarmHandler)
except CaChannelException, status:
print ca.message(status)
self.connected=0
def main():
try:
cawave = CaChannel()
cawave.searchw('cawave')
t = (0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19)
l = []
for i in range(0,500):
l.append(i)
#cawave.array_put(t)
#cawave.pend_io()
cawave.putw(l)
print(cawave.getw())
cawave.add_masked_array_event(None, None, ca.DBE_VALUE, getCallback, 0)
cawave.pend_event()
#cawave.clear_event()
except CaChannelException as status:
print(ca.message(status))
def testConnect(pv):
'''Tests if a CaChannel connection can be established to "pv"
@param pv:[string]
@return: True if can connect, otherwise False'''
result = False
if not IMPORTED_CACHANNEL:
return result
try:
#print 'testConnect:', type(pv), pv
chan = CaChannel.CaChannel()
chan.searchw(str(pv))
# val = chan.getw()
del chan
result = True
except (TypeError, CaChannel.CaChannelException), status:
# python3: (TypeError, CaChannel.CaChannelException) as status
#print 'testConnect:', status
pass
def connectw(self):
'''initiate the connection with EPICS, standard wait for the connection'''
if IMPORTED_CACHANNEL:
if len(self.pv) > 0:
self.chan = CaChannel.CaChannel()
self.chan.searchw(str(self.pv))
def connect(self):
'''initiate the connection with EPICS'''
if IMPORTED_CACHANNEL:
if len(self.pv) > 0:
self.chan = CaChannel.CaChannel()
self.chan.search(str(self.pv))
class RoboEpicsChannel:
def __init__(self,pvName,verbose=0):
self.MAXPUTS=10
self.pvName=pvName
self.status=0 # no error
self.severity=0
self.statusReady=0 # has a command been executed
self.waiting=0 # is the variable overbooked
self.putAttempts=0 # the number of times it has tried to put a variable
self.putSuccess=0 # if the last put command was successful
self.verbose=verbose # if epics should print everything out for alarms and all
self.CurrentText=""
if ((self.pvName.upper().find("ROBO")<0) & DebugMode):
self.rPrint("Variable "+pvName+" affects beamline and will not be altered")
self.reconnect()
def rPrint(self,cString):
self.CurrentText=self.pvName+": "+cString
print self.CurrentText
def binaryClick(self): #specific method for dealing with the binary variables that return T/F based on success in robot
putOK=self.rPutVal(5)
robotOK=self.getVal()
if (robotOK==5):
time.sleep(.12)
robotOK=self.getVal()
return (putOK & robotOK)
def getVal(self):
try:
val=self.chan.getw()
except:
try: #try one time to reconnect
self.rPrint("Variable "+self.pvName+" appears to be disconnected, attempting reconnect")
self.reconnect()
val=self.chan.getw()
self.statusReady=0
except:
self.connected=0
val=""
self.rPrint("Variable "+self.pvName+" cannot be read after 1 reconnect attempt")
return val
def putVal(self,val): #direct putval without any retry features
try:
if (self.waiting):
time.sleep(2) # give 2 seconds rest while the system is queued
if ((self.pvName.upper().find("ROBO")<0) & DebugMode):
self.rPrint("Debug Mode Enabled, thus not altered")
else:
self.chan.putw(val)
self.statusReady=0
time.sleep(0.12)
# sleep 120 ms to wait for alarm callback
if (self.statusReady==0):
self.alarmUpdate()
return self.putSuccess
except:
self.connected=0
return 0
def rPutVal(self,val): # the safe put function that ensures the robot accepts the command, the CAChannel package makes this trickier than needed
self.putSuccess=0
self.putAttempts=0
while ((self.putSuccess<>1) & (self.putAttempts<self.MAXPUTS)):
self.putVal(val)
if (self.putSuccess==0):
self.rPrint("Ensure Robot is on and in correct Position! Attempt "+self.putAttempts.__str__()+" of "+self.MAXPUTS.__str__())
tempPA=self.putAttempts
self.reconnect()
time.sleep(5)
self.putAttempts=tempPA
if (self.putSuccess):
if (self.verbose):
print self.pvName+" was successfully put"
return 1
else:
self.rPrint("Put was not successful")
return 0
def statusText(self):
return self.pvName+" is currently "+ca.alarmStatusString(self.status)
def alarmHandler(self,epics_args,user_args):
# a function to handle the alarm feedback from epics telling the user what has happened
# the primary purpose is to not allow channels to get overbooked CALC and to know if a variable has been set or nto
self.status=epics_args["pv_status"]
self.severity=epics_args["pv_severity"]
self.alarmUpdate()
def alarmUpdate(self):
self.statusReady=1
if ((self.status<>ca.AlarmStatus.NO_ALARM) & (self.status<>ca.AlarmStatus.CALC_ALARM)):
self.putSuccess=0
self.putAttempts+=1
if (self.verbose):
print self.statusText()
print "Variable "+self.pvName+" not successfully written after "+str(self.putAttempts)+" try"
print "Alarm Severity : "+ca.alarmSeverityString(self.severity)
else:
self.putSuccess=1
self.putAttempts=0
if (self.status==ca.AlarmStatus.CALC_ALARM):
self.waiting=1
if (self.verbose):
print "Variable "+self.pvName+" is currently queued!"
if ((self.waiting==1) & (self.status==ca.AlarmStatus.NO_ALARM)):
self.waiting=0
if (self.verbose):
print "Queue Cleared!"
def reconnect(self):
try:
self.chan=CaChannel()
self.chan.search(self.pvName)
self.chan.pend_io()
if (self.chan.element_count()<1):
self.rPrint("No channels named "+self.pvName+" found, is the SoftIOC running?")
self.connected=(self.chan.state()==ca.ch_state.cs_conn)
self.chan.add_masked_array_event(ca.DBR_STRING,1,ca.DBE_ALARM | ca.DBE_VALUE,self.alarmHandler)
except CaChannelException, status:
print ca.message(status)
self.connected=0
class RealRoboEpicsChannel:
def __init__(self,pvName,verbose=0,asString=0,vcCallback=None):
self.MAXPUTS=10
self.pvName=pvName
self.asString=asString
self.curValue=0
self.lastPoll=0
self.status=0 # no error
self.severity=0
self.statusReady=0 # has a command been executed
self.waiting=0 # is the variable overbooked
self.putAttempts=0 # the number of times it has tried to put a variable
self.putSuccess=0 # if the last put command was successful
self.verbose=verbose # if epics should print everything out for alarms and all
self.CurrentText=""
self.vcCallback=vcCallback # the callback should the value change feed with (chname,newVal,oldVal)
if ((self.pvName.upper().find("ROBO")<0) & DebugMode):
self.rPrint("Variable "+pvName+" affects beamline and will not be altered")
self.reconnect()
def rPrint(self,cString):
self.CurrentText=self.pvName+": "+cString
print self.CurrentText
def binaryClick(self): #specific method for dealing with the binary variables that return T/F based on success in robot
putOK=self.rPutVal(5)
robotOK=self.getVal()
if (robotOK==5):
time.sleep(.12)
robotOK=self.getVal()
if (ReadOnly):
putOK=1
robotOK=1
return (putOK & robotOK)
def getVal(self):
try:
cTime=time.time()
if (cTime-self.lastPoll)>0.2: # prevent double polling
val=self.chgetw()
self.curValue=val
self.lastPoll=cTime
else:
val=self.curValue
except:
try: #try one time to reconnect
self.rPrint("Variable "+self.pvName+" appears to be disconnected, attempting reconnect")
self.reconnect()
val=self.chgetw()
self.statusReady=0
except:
self.connected=0
val=""
self.rPrint("Variable "+self.pvName+" cannot be read after 1 reconnect attempt")
return val
def chgetw(self):
if self.asString==1:
return str(self.chan.getw(ca.DBF_STRING))
else:
return self.chan.getw()
def putVal(self,iVal): #direct putval without any retry features
self.lastPoll=0
# crop string when it is too long
val=iVal
if type(iVal)==type(''):
if len(iVal)>40:
val=iVal[0:39]
print 'String was cropped :'+str(val)
try:
if (self.waiting):
time.sleep(2) # give 2 seconds rest while the system is queued
if ((self.pvName.upper().find("ROBO")<0) & DebugMode):
self.rPrint("Debug Mode Enabled, thus not altered")
else:
if not ReadOnly:
self.curValue=val # default assumption is the value will be loaded
self.chan.putw(val)
self.statusReady=0
time.sleep(0.12)
# sleep 120 ms to wait for alarm callback
if (self.statusReady==0):
self.alarmUpdate()
return self.putSuccess
except:
self.connected=0
return 0
def rPutVal(self,val): # the safe put function that ensures the robot accepts the command, the CAChannel package makes this trickier than needed
self.putSuccess=0
self.putAttempts=0
self.lastPoll=0
while ((self.putSuccess<>1) & (self.putAttempts<self.MAXPUTS)):
self.putVal(val)
if (self.putSuccess==0):
self.rPrint("Ensure Robot is on and in correct Position! Attempt "+self.putAttempts.__str__()+" of "+self.MAXPUTS.__str__())
tempPA=self.putAttempts
self.reconnect()
time.sleep(5)
self.putAttempts=tempPA
if (self.putSuccess):
if (self.verbose):
print self.pvName+" was successfully put"
return 1
else:
self.rPrint("Put was not successful")
return 0
def statusText(self):
return self.pvName+" is currently "+ca.alarmStatusString(self.status)
def vcHandler(self,epics_args,user_args):
# A function to handle value change callbacks
newValue=epics_args['pv_value']
self.lastPoll=time.time()
if newValue!=self.curValue:
# It is different from what we set it to, ick
self.curValue=newValue
self.vcCallback.__call__(self.pvName,newValue,self.curValue)
def alarmHandler(self,epics_args,user_args):
# a function to handle the alarm feedback from epics telling the user what has happened
# the primary purpose is to not allow channels to get overbooked CALC and to know if a variable has been set or nto
self.status=epics_args["pv_status"]
self.severity=epics_args["pv_severity"]
self.alarmUpdate()
def alarmUpdate(self):
self.statusReady=1
if ((self.status<>ca.AlarmStatus.NO_ALARM) & (self.status<>ca.AlarmStatus.CALC_ALARM)):
self.putSuccess=0
self.putAttempts+=1
if (self.verbose):
print self.statusText()
if not (self.pvName.upper()=='ARIDI-PCT:CURRENT'):
print "Variable "+self.pvName+" not successfully written after "+str(self.putAttempts)+" try"
print "Alarm Severity : "+ca.alarmSeverityString(self.severity)
else:
self.putSuccess=1
self.putAttempts=0
if (self.status==ca.AlarmStatus.CALC_ALARM):
self.waiting=1
if (self.verbose):
print "Variable "+self.pvName+" is currently queued!"
if ((self.waiting==1) & (self.status==ca.AlarmStatus.NO_ALARM)):
self.waiting=0
if (self.verbose):
print "Queue Cleared!"
def reconnect(self):
try:
self.chan=CaChannel()
self.chan.search(self.pvName)
self.chan.pend_io()
if (self.chan.element_count()<1):
self.rPrint("No channels named "+self.pvName+" found, is the SoftIOC running?")
self.connected=(self.chan.state()==ca.ch_state.cs_conn)
self.chan.add_masked_array_event(ca.DBR_STRING,None,ca.DBE_ALARM,self.alarmHandler)
self.rebind(self.vcCallback)
except CaChannelException, status:
print ca.message(status)
self.connected=0
from CaChannel import * import time FastScan = 'X15U1:test:scan1' SlowScan = 'X15U1:test:scan2' ######this is should be changed SISPrefix = 'X15USIS:' FastMotor = 'X15U1:EH:MAN1:X' SlowMotor = 'X15U1:EH:MAN7:Z' xMAPPrefix = '15UdxpXMAP:' FileName = 'Scan11' ##### this is should be changed, the better way is the same as the file name of savedata FastSpeed = 1.0 SlowSpeed = 0.15 NumSlow=CaChannel() NumFast=CaChannel() xmapPixels=CaChannel() sisEraseStart=CaChannel() sisPixels=CaChannel() sisPreScale=CaChannel() xmapEraseStart=CaChannel() xmapState=CaChannel() FastScanBusy=CaChannel() netCDFSaveMode=CaChannel() netCDFNumCapture=CaChannel() netCDFEnable=CaChannel() netCDFCapture=CaChannel() netCDFFileName=CaChannel() netCDFFileNumber=CaChannel() Zmotor=CaChannel()
def main():
try:
chan = CaChannel()
print("search_and_connect")
chan.search_and_connect('catest', connectCb)
chan.flush_io()
for i in range(20):
chan.pend_event()
print("put_callback")
chan.array_put_callback(3.3, None, None, putCb)
chan.flush_io()
for i in range(20):
chan.pend_event()
print("get_callback")
chan.array_get_callback(None, None, getCb1)
chan.flush_io()
for i in range(20):
chan.pend_event()
print("get_callback with status")
chan.array_get_callback(ca.dbf_type_to_DBR_CTRL(chan.field_type()), None, getCb2)
chan.flush_io()
for i in range(20):
chan.pend_event()
except CaChannelException as status:
print(ca.message(status))
try:
cawave = CaChannel()
print("cawave: search_and_connect")
cawave.search_and_connect('cawave', connectCb)
cawave.flush_io()
for i in range(20):
cawave.pend_event()
print("cawave: array_put_callback")
l = [0,1,2,3,4,5,6,7,8,9]
cawave.array_put_callback(l, None, None, putCb)
cawave.flush_io()
for i in range(20):
cawave.pend_event()
print("cawave: array_get_callback")
cawave.array_get_callback(ca.dbf_type_to_DBR_CTRL(cawave.field_type()), None, getCb2)
cawave.flush_io()
for i in range(20):
cawave.pend_event()
except CaChannelException as status:
print(ca.message(status))
def main():
try:
cawave = CaChannel()
cawave.searchw('cawave')
t = (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
19)
l = []
for i in range(0, 500):
l.append(i)
#cawave.array_put(t)
#cawave.pend_io()
cawave.putw(l)
print(cawave.getw())
cawave.add_masked_array_event(None, None, ca.DBE_VALUE, getCallback, 0)
cawave.pend_event()
#cawave.clear_event()
except CaChannelException as status:
print(ca.message(status))
