def startup_dyio(self, use_lock=True) : if use_lock : self.dyio_lock.acquire() try : self.dyio = DyIO(SerialConnection(self.serial)) self.dyio.connect() self.channels = [None] * 24 self.setup = False finally : if use_lock : self.dyio_lock.release()
class IOD(SocketServer.TCPServer) :
def __init__(self, serial, port) :
self.serial = serial
self.port = port
self.dyio_lock = threading.Lock()
self.startup_dyio()
SocketServer.TCPServer.__init__(self, ('0.0.0.0', self.port), IODHandler)
def startup_dyio(self, use_lock=True) :
if use_lock :
self.dyio_lock.acquire()
try :
self.dyio = DyIO(SerialConnection(self.serial))
self.dyio.connect()
self.channels = [None] * 24
self.setup = False
finally :
if use_lock :
self.dyio_lock.release()
def shutdown_dyio(self, use_lock=True) :
if use_lock :
self.dyio_lock.acquire()
try :
# TODO determine what subset of these calls is really required
self.dyio.removeAllDyIOEventListeners()
self.dyio.stopHeartBeat()
self.dyio.disconnect()
finally :
if use_lock :
self.dyio_lock.release()
def op_reset(self) :
self.dyio_lock.acquire()
try :
try :
self.shutdown_dyio(use_lock=False)
except :
pass
self.startup_dyio(use_lock=False)
return {iod_proto.SLOT_STATUS : iod_proto.STATUS_OK}
finally :
self.dyio_lock.release()
def op_setup(self, arg) :
self.dyio_lock.acquire()
try :
setup = set()
for channel, channeltype in arg :
if channel in setup :
return {iod_proto.SLOT_STATUS : iod_proto.STATUS_FAIL}
if self.channels[channel] is not None :
continue
if channeltype == iod_proto.CHANNELTYPE_DIGITAL :
self.channels[channel] = DigitalInputChannel(self.dyio.getChannel(channel))
elif channeltype == iod_proto.CHANNELTYPE_ANALOG :
self.channels[channel] = AnalogInputChannel(self.dyio.getChannel(channel))
elif channeltype == iod_proto.CHANNELTYPE_DIGITALOUT :
self.channels[channel] = DigitalOutputChannel(self.dyio.getChannel(channel))
self.setup = True
return {iod_proto.SLOT_STATUS : iod_proto.STATUS_OK}
finally :
self.dyio_lock.release()
def op_set(self, arg) :
self.dyio_lock.acquire()
try :
if not self.setup :
return {iod_proto.SLOT_STATUS : iod_proto.STATUS_FAIL}
for channel, value in arg :
if not isinstance(self.channels[channel], DigitalOutputChannel) :
return {iod_proto.SLOT_STATUS : iod_proto.STATUS_FAIL}
for channel, value in arg :
value = bool(value)
self.channels[channel].setHigh(value)
return {iod_proto.SLOT_STATUS : iod_proto.STATUS_OK}
finally :
self.dyio_lock.release()
def op_sample(self, arg) :
self.dyio_lock.acquire()
try :
if not self.setup :
return {iod_proto.SLOT_STATUS : iod_proto.STATUS_FAIL}
for channelid in arg :
if isinstance(self.channels[channelid], DigitalInputChannel) :
continue
if isinstance(self.channels[channelid], AnalogInputChannel) :
continue
return {iod_proto.SLOT_STATUS : iod_proto.STATUS_FAIL}
samples = []
for channelid in arg :
if isinstance(self.channels[channelid], DigitalInputChannel) :
v = not self.channels[channelid].isHigh()
if isinstance(self.channels[channelid], AnalogInputChannel) :
v = self.channels[channelid].getVoltage()
samples.append((channelid, v))
return {iod_proto.SLOT_STATUS : iod_proto.STATUS_OK, iod_proto.SLOT_DATA : samples}
finally :
self.dyio_lock.release()