def setup_pv(pvname, con_cb=None, mon_cb=None, signal=None, mon_cb_once=False):
"""
Initialize an EPICS PV using psp with proper callbacks.
:param pvname: EPICS PV name
:type pvname: str
:param con_cb: Connection callback. If left as None and provided with
signal, emit our value from signal as the callback.
:type con_cb: function(isconnected=None)
:param mon_cb: Monitor callback. If left as None and provided with signal,
emit our value from signal as the callback.
:type mon_cb: function(errors=None)
:param signal: Signal to emit our value on as the default callback when
con_cb or mon_cb are left as None. Check the base
:class:`PyDMConnection` class for available signals.
:type signal: pyqtSignal
:param mon_cb_once: True if we only want the monitor callback to run once.
:type mon_cb_once: bool
:rtype: Pv
"""
pv = Pv(pvname, use_numpy=True)
if signal is None:
default_mon_cb = lambda e: None
else:
default_mon_cb = generic_mon_cb(pv, signal)
pv.add_connection_callback(con_cb or generic_con_cb(pv))
pv.add_monitor_callback(mon_cb or default_mon_cb, once=mon_cb_once)
pv.connect(None)
return pv
def setup_pv(pvname, con_cb=None, mon_cb=None, rwaccess_cb=None, signal=None, mon_cb_once=False):
"""
Initialize an EPICS PV using psp with proper callbacks.
:param pvname: EPICS PV name
:type pvname: str
:param con_cb: Connection callback. If left as None and provided with
signal, emit our value from signal as the callback.
:type con_cb: function(isconnected=None)
:param mon_cb: Monitor callback. If left as None and provided with signal,
emit our value from signal as the callback.
:type mon_cb: function(errors=None)
:param rwaccess_cb: Read/write access state callback.
:type rwaccess_cb: function(access_state)
:param signal: Signal to emit our value on as the default callback when
con_cb or mon_cb are left as None. Check the base
:class:`PyDMConnection` class for available signals.
:type signal: Signal
:param mon_cb_once: True if we only want the monitor callback to run once.
:type mon_cb_once: bool
:rtype: Pv
"""
pv = Pv(pvname, use_numpy=True)
if signal is None:
default_mon_cb = lambda e: None
else:
default_mon_cb = generic_mon_cb(pv, signal)
pv.add_connection_callback(con_cb or generic_con_cb(pv))
pv.add_monitor_callback(mon_cb or default_mon_cb, once=mon_cb_once)
if rwaccess_cb:
pv.add_rwaccess_callback(rwaccess_cb)
pv.connect(None)
return pv
def dopv(self, name, gui, format):
pv = Pv(name, initialize=True)
if pv != None:
gui.setText("")
pv.gui = gui
pv.format = format
self.pvlist.append(pv)
pv.add_monitor_callback(lambda e: self.displayPV(pv, e))
try:
pv.wait_ready(0.5)
pv.monitor()
except:
pass
