def __init__(self):
# a dictionary associating all physical attached Phidget channels
# to their availablility state:
# True: available for attach to a software channel
# False: occupied and connected to a software channel
# access to this dict is protected by the managersemaphore and
# should happen only via the methods addChannel and deleteChannel
self.attachedPhidgetChannels = {}
self.managersemaphore = QSemaphore(1)
self.manager = Manager()
self.manager.setOnAttachHandler(self.attachHandler)
self.manager.setOnDetachHandler(self.detachHandler)
self.manager.open()
class PhidgetManager():
def __init__(self):
# a dictionary associating all physical attached Phidget channels
# to their availablility state:
# True: available for attach to a software channel
# False: occupied and connected to a software channel
# access to this dict is protected by the managersemaphore and
# should happen only via the methods addChannel and deleteChannel
self.attachedPhidgetChannels = {}
self.managersemaphore = QSemaphore(1)
self.manager = Manager()
self.manager.setOnAttachHandler(self.attachHandler)
self.manager.setOnDetachHandler(self.detachHandler)
self.manager.open()
def close(self):
self.manager.close()
self.attachedPhidgetChannels.clear()
def attachHandler(self,_,attachedChannel):
try:
if attachedChannel.getParent().getDeviceClass() != DeviceClass.PHIDCLASS_HUB:
# we do not add the hub itself
self.addChannel(attachedChannel)
except:
pass
def detachHandler(self,_,attachedChannel):
try:
self.deleteChannel(attachedChannel)
except:
pass
def addChannel(self,channel):
try:
self.managersemaphore.acquire(1)
state = True
try:
# reserve all channels with the same hubport on the same hub
hub = channel.getHub()
hubport = channel.getHubPort()
hupportdevice = bool(channel.getIsHubPortDevice() == 0) # it is not a direct hubport channel
for k, _ in self.attachedPhidgetChannels.items():
try:
khub = k.getHub()
khubport = k.getHubPort()
if khub == hub and khubport == hubport:
if hupportdevice:
if k.getIsHubPortDevice() != 0:
self.attachedPhidgetChannels[k] = False
#else:
# other is also a VINT device. Do nothing
else:
if k.getIsHubPortDevice() == 0:
# there is a port registered with connected VINT device we deactivate this hubport channel
state = False
#else:
# do nothing
except:
pass
except:
pass
self.attachedPhidgetChannels[channel] = state
except Exception:
pass
finally:
if self.managersemaphore.available() < 1:
self.managersemaphore.release(1)
def deleteChannel(self,channel):
try:
self.managersemaphore.acquire(1)
# if channel is a VINT device, release all HUBport channels that were blocked by this VINT device
try:
hub = channel.getHub()
hubport = channel.getHubPort()
hupportdevice = bool(channel.getIsHubPortDevice() == 0) # it is not a direct hubport channel
if hupportdevice:
for k, _ in self.attachedPhidgetChannels.items():
if k != channel:
try:
khub = k.getHub()
khubport = k.getHubPort()
if khub == hub and khubport == hubport:
self.attachedPhidgetChannels[k] = True
except:
pass
except:
pass
self.attachedPhidgetChannels.pop(channel, None)
except Exception:
pass
finally:
if self.managersemaphore.available() < 1:
self.managersemaphore.release(1)
def getChannel(self,serial,port,channel,phidget_class_name,device_id,remote,remoteOnly):
try:
self.managersemaphore.acquire(1)
if device_id in [DeviceID.PHIDID_HUB0000]:
# we are looking for HUB ports
hub = 1
else:
hub = 0
for k, _ in self.attachedPhidgetChannels.items():
if k.getIsHubPortDevice() or k.getDeviceClass() == DeviceClass.PHIDCLASS_VINT:
kport = k.getHubPort()
else:
kport = None
if k.getDeviceSerialNumber() == serial and (port is None or kport == port) and \
(hub or (k.getDeviceID() == device_id)) and \
((remote and not remoteOnly) or (not remote and k.getIsLocal()) or (remote and remoteOnly and not k.getIsLocal())) and \
k.getChannelClassName() == phidget_class_name and \
k.getChannel() == channel:
return k
return None
except Exception:
return None
finally:
if self.managersemaphore.available() < 1:
self.managersemaphore.release(1)
def reserveSerialPort(self,serial,port,channel,phidget_class_name,device_id,remote=False,remoteOnly=False):
chnl = self.getChannel(serial,port,channel,phidget_class_name,device_id,remote,remoteOnly)
self.reserveChannel(chnl)
def releaseSerialPort(self,serial,port,channel,phidget_class_name,device_id,remote=False,remoteOnly=False):
chnl = self.getChannel(serial,port,channel,phidget_class_name,device_id,remote,remoteOnly)
self.releaseChannel(chnl)
# should be called from the attach handler that binds this hardware channel to a software channel
def reserveChannel(self,channel):
try:
self.managersemaphore.acquire(1)
if channel is not None and channel in self.attachedPhidgetChannels:
self.attachedPhidgetChannels[channel] = False
if channel.getIsHubPortDevice():
hub = channel.getHub()
port = channel.getHubPort()
# reserve also all other channels with that hub/port combination
for k, _ in self.attachedPhidgetChannels.items():
try:
if k.getHub() == hub and k.getHubPort() == port:
self.attachedPhidgetChannels[k] = False
except:
pass
#else:
# not a HUB port
except Exception:
pass
finally:
if self.managersemaphore.available() < 1:
self.managersemaphore.release(1)
# should be called from the detach handler that releases this hardware channel fron a software channel
def releaseChannel(self,channel):
try:
self.managersemaphore.acquire(1)
if channel is not None and channel in self.attachedPhidgetChannels:
self.attachedPhidgetChannels[channel] = True
if channel.getIsHubPortDevice():
hub = channel.getHub()
port = channel.getHubPort()
# enable also all other channels with that hub/port combination
for k, _ in self.attachedPhidgetChannels.items():
try:
if k.getHub() == hub and k.getHubPort() == port:
self.attachedPhidgetChannels[k] = True
except:
pass
except Exception:
pass
finally:
if self.managersemaphore.available() < 1:
self.managersemaphore.release(1)
# def print_list(self,items):
# for k,v in items:
# print(v,k.getDeviceSerialNumber(),k.getDeviceClass(),k.getDeviceClassName(),k.getDeviceName(),k.getDeviceSKU(),k.getChannelClassName(),k.getDeviceID(),k.getIsHubPortDevice(),"port: ",k.getHubPort(),"ch: ", k.getChannel(), "local: ", k.getIsLocal())
#
# def print_list2(self,items):
# for k in items:
# print(k.getDeviceSerialNumber(),k.getChannelClassName(),k.getDeviceID(),k.getIsHubPortDevice(),"port: ", k.getHubPort(),"ch: ",k.getChannel(), "local: ", k.getIsLocal())
# returns the first matching Phidget channel and reserves it
def getFirstMatchingPhidget(self,phidget_class_name,device_id,channel=None,remote=False,remoteOnly=False):
try:
self.managersemaphore.acquire(1)
if device_id in [
DeviceID.PHIDID_HUB0000,
DeviceID.PHIDID_DIGITALINPUT_PORT,
DeviceID.PHIDID_DIGITALOUTPUT_PORT,
DeviceID.PHIDID_VOLTAGEINPUT_PORT,
DeviceID.PHIDID_VOLTAGERATIOINPUT_PORT]:
# we are looking for HUB ports
hub = 1
else:
hub = 0
# self.print_list(self.attachedPhidgetChannels.items())
# get list of all matching phidget channels
matching_channels = [k for k, v in self.attachedPhidgetChannels.items() if v and \
(hub or (k.getDeviceID() == device_id)) and \
((remote and not remoteOnly) or (not remote and k.getIsLocal()) or (remote and remoteOnly and not k.getIsLocal())) and \
k.getChannelClassName() == phidget_class_name and \
(channel is None or (not hub and channel == k.getChannel()) or (hub and k.getIsHubPortDevice() and k.getHubPort() == channel))]
# self.print_list2(matching_channels)
# sort by serial number (local first)
matching_channels.sort(key=lambda x:x.getDeviceSerialNumber())
# return smallest / first item
if len(matching_channels) > 0:
p = matching_channels[0]
if p.getIsHubPortDevice() or p.getDeviceClass() == DeviceClass.PHIDCLASS_VINT:
port = p.getHubPort()
else:
port = None
return p.getDeviceSerialNumber(), port
else:
return None, None
except Exception:
return None, None
finally:
if self.managersemaphore.available() < 1:
self.managersemaphore.release(1)