def __init__(self):
self.value = 0
self.flag = False
self.severity = Severity.INVALID_ALARM
self.alarm = Alarm.UDF_ALARM
self.udf = True
self.mask = 0
self.time = cas.epicsTimeStamp()
def setParamValue(self, reason, value):
"""set PV value and request update
:param str reason:
:param value: new value
"""
# check whether update is needed
same = self.pvDB[reason].value == value
if (type(same) == bool and not same) or (hasattr(same, 'all') and not same.all()):
# make a copy of mutable objects, list, numpy.ndarray
if isinstance(value, list):
value = value[:]
elif str(type(value)) == "<type 'numpy.ndarray'>":
value = value.copy()
self.pvDB[reason].value = value
self.pvDB[reason].flag = True
self.pvDB[reason].mask = (cas.DBE_VALUE | cas.DBE_LOG)
self.pvDB[reason].time = cas.epicsTimeStamp()
def setParam(self, reason, value):
"""set PV value and request update
:param str reason: PV base name
:param value: PV new value
Store the PV's new value if it is indeed different from the old.
For list and numpy array, a copy will be made.
This new value will be pushed to registered client the next time when :meth:`updatePVs` is called.
The timestamp will be updated to the current time anyway.
Alarm and severity status are updated as well. For numeric type, the alarm/severity is determined as the
following:
======================== ============ ============
value alarm severity
======================== ============ ============
value < *lolo* LOLO_ALARM MAJOR_ALARM
*lolo* < value < *low* LOW_ALARM MINOR_ALARM
*low* < value < *high* NO_ALARM NO_ALARM
*high* < value < *hihi* HIGH_ALARM MINOR_ALARM
value > *hihi* HIHI_ALARM MAJOR_ALARM
======================== ============ ============
For enumerate type, the alarm severity is defined by field *states*. And if severity is other than NO_ALARM,
the alarm status is STATE_ALARM.
"""
# check whether update is needed
same = self.pvDB[reason].value == value
if (type(same) == bool and not same) or (hasattr(same, 'all') and not same.all()):
# make a copy of mutable objects, list, numpy.ndarray
if isinstance(value, list):
value = value[:]
elif str(type(value)) == "<type 'numpy.ndarray'>":
value = value.copy()
self.pvDB[reason].value = value
self.pvDB[reason].flag = True
self.pvDB[reason].time = cas.epicsTimeStamp()
alarm, severity = self._checkAlarm(reason, value)
if alarm is not None: self.pvDB[reason].alarm = alarm
if severity is not None: self.pvDB[reason].severity = severity
logging.getLogger('pcaspy.Driver.setParam')\
.debug('%s: %s', reason, self.pvDB[reason])
def __init__(self):
self.value = 0
self.flag = False
self.severity = Severity.INVALID_ALARM
self.alarm = Alarm.UDF_ALARM
self.time = cas.epicsTimeStamp()
