def setup_server(self) -> None:
"""Configure and start server.
"""
# ignore interrupt in subprocess
signal.signal(signal.SIGINT, signal.SIG_IGN)
logger.info("Initializing CA server")
# initialize channel access server
self.ca_server = SimpleServer()
# create all process variables using the process variables stored in
# pvdb with the given prefix
pvdb, self._child_to_parent_map = build_pvdb(self._input_variables,
self._output_variables)
self.ca_server.createPV(self._prefix + ":", pvdb)
# set up driver for handing read and write requests to process variables
self.ca_driver = CADriver(server=self)
# start the server thread
self.server_thread = ServerThread(self.ca_server)
self.server_thread.start()
logger.info("CA server started")
def start_server(self):
"""
Allow the current server to begin processing
"""
if self.server is None:
self.make_server()
self.stop_server()
self.server_thread = ServerThread(self.server)
self.server_thread.start()
def start_server(self):
"""
Allow the current server to begin processing
"""
logger.debug('Restarting pcaspy server')
if self.server is None:
self.make_server()
self.stop_server()
self.server_thread = ServerThread(self.server)
logger.debug('Pressing start')
self.server_thread.start()
def startEpics(self):
self.server = SimpleServer()
self.server.createPV(prefix=self.pvs['prefix'], \
pvdb={self.pvs['pos_x'] : {'prec' : 3}, })
self.server.createPV(prefix=self.pvs['prefix'], \
pvdb={self.pvs['pos_y'] : {'prec' : 3}, })
self.drv = myDriver()
self.server_thread = ServerThread(self.server)
self.server_thread.start()
def main(args):
server = SimpleServer()
server.createPV(args.prefix, pvdb)
server_thread = ServerThread(server)
driver = Model()
def signal_handler(sig, frame):
print("Shut down server")
server_thread.stop()
signal.signal(signal.SIGINT, signal_handler)
server_thread.start()
class TestServer(object):
"""
Class to create temporary pvs to check in psp_plugin
"""
def __init__(self, pvbase, **pvdb):
self.pvbase = pvbase
self.pvdb = pvdb
self.kill_server()
def make_server(self):
"""
Create a new server and start it
"""
logger.debug('Create new server')
self.server = SimpleServer()
self.server.createPV(self.pvbase + ":", self.pvdb)
self.driver = TestDriver()
def kill_server(self):
"""
Remove the existing server (if it exists) and re-initialize
"""
logger.debug('Kill server')
self.stop_server()
self.server = None
self.driver = None
def start_server(self):
"""
Allow the current server to begin processing
"""
logger.debug('Restarting pcaspy server')
if self.server is None:
self.make_server()
self.stop_server()
self.server_thread = ServerThread(self.server)
logger.debug('Pressing start')
self.server_thread.start()
def stop_server(self):
"""
Pause server processing
"""
logger.debug('Stop old server, if exists')
try:
self.server_thread.stop()
except Exception:
pass
def pv_server(scope='function'):
prefix = 'Ts:'
pvdb = {
'pv1': {
'value': 0,
'hihi': 10,
'high': 5,
'low': -5,
'lolo': -10
},
'pv2': {},
'wf': {
'type': 'char',
'count': 300,
'value': 'some initial message. but it can become very long.'
}
}
server = SimpleServer()
server.createPV(prefix, pvdb)
driver = ioDriver()
server_thread = ServerThread(server)
server_thread.start()
yield server_thread
# After tests have completed or faileds
server_thread.stop()
class PVManager(object):
def __init__(self, prefix):
self.prefix = prefix
self.thread = None
self.server = CAServer()
self.driver = None
@property
def pvs(self):
return self.server.pvs
def remove_pv(self, pvname):
return self.server._remove_pv(pvname)
def add_pv(self, pvname, write_callback=None, **kwargs):
kwargs['port'] = CADriver.port
pv = self.server._create_pv(self.prefix, pvname, kwargs)
if self.driver is None:
self.driver = CADriver(self, self.server.pvs)
else:
self.driver.check_pvs()
if write_callback is not None:
assert(hasattr(write_callback, '__call__'))
pv._write_callbacks.add(write_callback)
pv.driver = self.driver
return pv
def run(self):
if self.thread is None or not self.thread.is_alive():
self.thread = ServerThread(self.server)
self.thread.setDaemon(True)
self.thread.start()
def stop(self, join=True):
if self.thread is not None:
self.thread.stop()
if join:
self.thread.join()
print('CAS thread finished')
class Frame_Thread(QThread):
frame_signal = pyqtSignal(np.ndarray)
distrs_signal = pyqtSignal(np.ndarray, np.ndarray)
params_signal = pyqtSignal(np.ndarray, np.ndarray, np.ndarray, np.ndarray)
def __init__(self):
super(QThread, self).__init__()
super(QThread, self).__init__()
self.isRunning = False
self.device_manager = gx.DeviceManager()
self.camera = None
self.exposure = None
self.img_shape = [None, None]
self.img_ranges = [None, None, None, None]
self.calibr = [None, None]
self.isProfile = False
self.isCalcParams = False
self.configfile = 'config.ini'
self.config = configparser.ConfigParser()
self.lastFrame = None
self.exposure_changed = False
self.pvs = {'prefix' : None, 'pos_x' : None, 'pos_y' : None}
self.server = None
self.drv = None
self.server_thread = None
self.isAvg = False
self.avgFrames = 1
self.avgDelay = 0
def __del__(self):
pass
def camerasList(self):
dev_num, dev_info_list = self.device_manager.update_device_list()
return dev_info_list if dev_num > 0 else None
def setCamera(self, index):
self.camera = self.device_manager.open_device_by_index(index+1)
self.exposure = self.camera.ExposureTime.get()
self.img_shape = [self.camera.Width.get(), self.camera.Height.get()]
self.camera.Gain.set(0)
self.camera.TriggerMode.set(gx.GxSwitchEntry.OFF)
def setExposure(self, value):
self.exposure = value
self.exposure_changed = True
def setConfig(self):
self.config.read(self.configfile)
if len(self.config.sections()) > 0:
frame = np.array(list(self.config['FRAME'].values()), dtype='int32')
shape = [self.img_shape[0]-10, self.img_shape[0], \
self.img_shape[1]-10, self.img_shape[1]]
self.img_ranges = np.maximum([0,10,0,10], np.minimum(frame, shape))
self.calibr[0] = float(self.config['CALIBR_cm_per_px']['x'])
self.calibr[1] = float(self.config['CALIBR_cm_per_px']['y'])
self.pvs = dict(self.config['PV_NAMES'])
def saveConfig(self):
self.config['FRAME'] = {'min_x' : str(self.img_ranges[0]), \
'max_x' : str(self.img_ranges[1]), \
'min_y' : str(self.img_ranges[2]), \
'max_y' : str(self.img_ranges[3]) }
with open(self.configfile, 'w') as configfile:
self.config.write(configfile)
def startEpics(self):
self.server = SimpleServer()
self.server.createPV(prefix=self.pvs['prefix'], \
pvdb={self.pvs['pos_x'] : {'prec' : 3}, })
self.server.createPV(prefix=self.pvs['prefix'], \
pvdb={self.pvs['pos_y'] : {'prec' : 3}, })
self.drv = myDriver()
self.server_thread = ServerThread(self.server)
self.server_thread.start()
def stopEpics(self):
if self.server_thread is not None:
self.server_thread.stop()
self.drv = None
def run(self):
self.isRunning = True
self.camera.stream_on()
#print(f'camera: {self.camera}')
while self.isRunning:
if self.exposure_changed == True:
self.camera.ExposureTime.set(self.exposure)
self.exposure_changed = False
img = self.camera.data_stream[0].get_image()
if img == None:
continue
self.lastFrame = img.get_numpy_array()
self.frame_signal.emit(self.lastFrame)
if self.isProfile or self.isCalcParams:
proc = self.lastFrame[self.img_ranges[2]:self.img_ranges[3],\
self.img_ranges[0]:self.img_ranges[1]]
x, y = np.sum(proc, axis=0), np.sum(proc, axis=1)
if self.isProfile:
self.distrs_signal.emit(x, y)
if self.isCalcParams:
optx = fit(x)
opty = fit(y)
self.params_signal.emit(x, y, optx, opty)
if self.drv is not None:
self.drv.update(self.pvs['pos_x'], 10*self.calibr[0]*optx[1])
self.drv.update(self.pvs['pos_y'], 10*self.calibr[1]*opty[1])
self.camera.stream_off()
def stop(self):
self.isRunning = False
maxi = maxigauge(arguments.serial)
maxi.loadSensors()
_logger.info("I got %d sensors in the controller." % maxi._NumSensors)
prefixs = []
pvsGauge = {}
pvsRelay = {}
for j in range(len(maxi.sensors)):
prefixs.append("PG%d" % j)
pvsGauge.update(ioc.pvsPG(prefixs[-1]))
for j in range(len(maxi.relay)):
prefixs.append("RL%d" % j)
pvsRelay.update(ioc.pvsRELAY(prefixs[-1]))
server = SimpleServer()
server.createPV(prefix=arguments.ioc_prefix, pvdb=pvsGauge)
server.createPV(prefix=arguments.ioc_prefix, pvdb=pvsRelay)
driver = ioc.maxigauge_ioc(maxi, prefixs)
server_thread = ServerThread(server)
server_thread.start()
if __name__ == "__main__":
while not (input("Press 'q' to quit: ") == 'q'):
pass
_logger.info("User requested ioc termination. Exiting.")
server_thread.stop()
sys.exit()
def main():
parser = ArgumentParser()
parser.add_argument("--ioc_prefix",
type=str,
help="Global prefix of the IOC.")
parser.add_argument("--pump_prefix",
type=str,
help="Prefix for pump shutter.")
parser.add_argument("--pump_port", type=int, help="GPIO port of pump.")
parser.add_argument("--probe_prefix",
type=str,
help="Prefix for probe shutter.")
parser.add_argument("--probe_port", type=int, help="GPIO port of probe.")
parser.add_argument("--valve_prefix",
type=str,
help="Prefix for pulse valve.")
parser.add_argument("--valve_port",
type=str,
help="Serial port of pulse valve.")
parser.add_argument("--notebook_prefix",
type=str,
help="Prefix for Notebook.")
parser.add_argument("--log_level",
type=str,
help="Logging level for the iocs")
arguments = parser.parse_args()
logging.basicConfig(stream=sys.stdout, level=arguments.log_level)
_logger = logging.getLogger(arguments.ioc_prefix[:-1])
pvdb = {}
pvdb.update(ioc_notebook.make_pvs(arguments.notebook_prefix))
pvdb.update(ioc_RaspiGPIO.make_pvs(arguments.pump_prefix))
pvdb.update(ioc_RaspiGPIO.make_pvs(arguments.probe_prefix))
pvdb.update(ioc_AttoTech.make_pvs(arguments.valve_prefix))
_logger.info("Starting ioc with prefix '%s'.", arguments.ioc_prefix)
server = SimpleServer()
server.createPV(prefix=arguments.ioc_prefix, pvdb=pvdb)
#Setting devices drivers
PumpShutter_driver = RaspiShutter(arguments.pump_port)
if not (PumpShutter_driver.ready):
_logger.ERROR("Error connecting to Pump shutter")
HHGShutter_driver = RaspiShutter(arguments.probe_port)
if not (HHGShutter_driver.ready):
_logger.ERROR("Error connecting to ProbeShutter")
valve_driver = AttoValve(arguments.valve_port)
if not (valve_driver.ready):
_logger.ERROR("Error connecting to AttoValve")
driver = ioc.ioc_raspi1()
valve_ioc = ioc_AttoTech.EpicsAttoTechDriver(valve_driver, driver,
arguments.valve_prefix)
pumpshutter_ioc = ioc_RaspiGPIO.EpicsRaspiShutterDriver(
PumpShutter_driver, driver, arguments.pump_prefix)
hhgshutter_ioc = ioc_RaspiGPIO.EpicsRaspiShutterDriver(
HHGShutter_driver, driver, arguments.probe_prefix)
notebook_ioc = ioc_notebook.NoteBookIoc(driver, arguments.notebook_prefix)
driver.add_ioc(valve_ioc)
driver.add_ioc(pumpshutter_ioc)
driver.add_ioc(hhgshutter_ioc)
driver.add_ioc(notebook_ioc)
server_thread = ServerThread(server)
server_thread.start()
while not (raw_input("Press 'q' to quit: ") == "q"):
pass
server_thread.stop()
_logger.info("User requested ioc termination. Exiting.")
PumpShutter_driver.close()
HHGShutter_driver.close()
valve_driver.close()
super(Display, self).__init__()
layout = QtGui.QHBoxLayout()
layout.addWidget(QtGui.QLabel('Value:'))
input = QtGui.QDoubleSpinBox()
layout.addWidget(input)
self.setLayout(layout)
self.connect(input, QtCore.SIGNAL('valueChanged(double)'), self.newValue)
self.drv = myDriver()
def newValue(self, value):
self.drv.write('RAND', value)
self.drv.updatePVs()
if __name__ == '__main__':
# create pcas server
server = SimpleServer()
server.createPV(prefix, pvdb)
# create qt gui
app = QtGui.QApplication(sys.argv)
win = Display()
win.show()
# create pcas server thread and shut down when app exits
server_thread = ServerThread(server)
QtCore.QObject.connect(app, QtCore.SIGNAL('lastWindowClosed()'), server_thread.stop)
# start pcas and gui event loop
server_thread.start()
app.exec_()
class CAServer(multiprocessing.Process):
"""
Process-based implementation of Channel Access server.
Attributes:
ca_server (SimpleServer): pcaspy SimpleServer instance
ca_driver (Driver): pcaspy Driver instance
server_thread (ServerThread): Thread for running the server
exit_event (multiprocessing.Event): Event indicating shutdown
"""
protocol = "ca"
def __init__(
self,
prefix: str,
input_variables: Dict[str, InputVariable],
output_variables: Dict[str, OutputVariable],
in_queue: multiprocessing.Queue,
out_queue: multiprocessing.Queue,
running_indicator: multiprocessing.Value,
*args,
**kwargs,
) -> None:
"""Initialize server process.
Args:
prefix (str): EPICS prefix for serving process variables
input_variables (Dict[str, InputVariable]): Dictionary mapping pvname to lume-model input variable.
output_variables (Dict[str, OutputVariable]):Dictionary mapping pvname to lume-model output variable.
in_queue (multiprocessing.Queue): Queue for tracking updates to input variables
out_queue (multiprocessing.Queue): Queue for tracking updates to output variables
"""
super().__init__(*args, **kwargs)
self.ca_server = None
self.ca_driver = None
self.server_thread = None
self.exit_event = multiprocessing.Event()
self._prefix = prefix
self._input_variables = input_variables
self._output_variables = output_variables
self._in_queue = in_queue
self._out_queue = out_queue
self._providers = {}
self._running_indicator = running_indicator
# cached pv values
self._cached_values = {}
def update_pv(self, pvname, value) -> None:
"""Adds update to input process variable to the input queue.
Args:
pvname (str): Name of process variable
value (Union[np.ndarray, float]): Value to set
"""
val = value
pvname = pvname.replace(f"{self._prefix}:", "")
self._cached_values.update({pvname: val})
# only update if not running
if not self._running_indicator.value:
self._in_queue.put({
"protocol": self.protocol,
"pvs": self._cached_values
})
self._cached_values = {}
def setup_server(self) -> None:
"""Configure and start server.
"""
# ignore interrupt in subprocess
signal.signal(signal.SIGINT, signal.SIG_IGN)
logger.info("Initializing CA server")
# initialize channel access server
self.ca_server = SimpleServer()
# create all process variables using the process variables stored in
# pvdb with the given prefix
pvdb, self._child_to_parent_map = build_pvdb(self._input_variables,
self._output_variables)
self.ca_server.createPV(self._prefix + ":", pvdb)
# set up driver for handing read and write requests to process variables
self.ca_driver = CADriver(server=self)
# start the server thread
self.server_thread = ServerThread(self.ca_server)
self.server_thread.start()
logger.info("CA server started")
def update_pvs(
self,
input_variables: List[InputVariable],
output_variables: List[OutputVariable],
):
"""Update process variables over Channel Access.
Args:
input_variables (List[InputVariable]): List of lume-epics output variables.
output_variables (List[OutputVariable]): List of lume-model output variables.
"""
variables = input_variables + output_variables
self.ca_driver.update_pvs(variables)
def run(self) -> None:
"""Start server process.
"""
self.setup_server()
while not self.exit_event.is_set():
try:
data = self._out_queue.get_nowait()
inputs = data.get("input_variables", [])
outputs = data.get("output_variables", [])
self.update_pvs(inputs, outputs)
except Empty:
time.sleep(0.01)
logger.debug("out queue empty")
self.server_thread.stop()
# self.server_thread.join()
logger.info("Channel access server stopped.")
def shutdown(self):
"""Safely shutdown the server process.
"""
self.exit_event.set()
def run(self):
if self.thread is None or not self.thread.is_alive():
self.thread = ServerThread(self.server)
self.thread.setDaemon(True)
self.thread.start()