class TemperatureController(QObject):
"""Class to communicate with the Scientific Instruments SI 9650 temperature controller / sensor via GPIB"""
def __init__(self, addr="GPIB::15", parent=None):
super(TemperatureController, self).__init__(parent)
self.tempController = VisaConnection(addr)
@pyqtSlot()
def getTemperature(self):
#return float(self.tempController.read("T")[1:])
attempt = 1
try:
response = self._readSafe("T")
except Exception as e:
pass
temperature = float(response[1:])
self.emit(SIGNAL("tempDataReady"), temperature)
return temperature
@pyqtSlot()
def getSetTemperature(self):
#return float(self.tempController.read("S")[1:])
response = self._readSafe("S")
self.emit(SIGNAL("setTempDataReady"), float(response[1:]))
def setTemperature(self, temperature):
self.tempController.write("S" + "{:3.1f}".format(temperature))
def _readSafe(self, cmd):
""" read command cmd a number of times until the expected response is returned """
attempt = 1
while attempt < REMEASURE_ATTEMPTS:
response = self.tempController.readQuery(cmd)
if response[0] == cmd:
break
else:
attempt += 1
if attempt < REMEASURE_ATTEMPTS:
return response
else:
raise ReadError, "Error reading cmd " + cmd + " from temperature controller"
class TemperatureController(QObject):
"""Class to communicate with the Scientific Instruments SI 9650 temperature controller / sensor via GPIB"""
def __init__(self,addr="GPIB::15",parent=None):
super(TemperatureController, self).__init__(parent)
self.tempController=VisaConnection(addr)
@pyqtSlot()
def getTemperature(self):
#return float(self.tempController.read("T")[1:])
attempt=1
try:
response=self._readSafe("T")
except Exception as e:
pass
temperature=float(response[1:])
self.emit(SIGNAL("tempDataReady"),temperature)
return temperature
@pyqtSlot()
def getSetTemperature(self):
#return float(self.tempController.read("S")[1:])
response=self._readSafe("S")
self.emit(SIGNAL("setTempDataReady"),float(response[1:]))
def setTemperature(self,temperature):
self.tempController.write("S"+"{:3.1f}".format(temperature))
def _readSafe(self,cmd):
""" read command cmd a number of times until the expected response is returned """
attempt=1
while attempt < REMEASURE_ATTEMPTS:
response=self.tempController.readQuery(cmd)
if response[0]==cmd:
break
else:
attempt+=1
if attempt < REMEASURE_ATTEMPTS:
return response
else:
raise ReadError, "Error reading cmd " + cmd + " from temperature controller"
def __init__(self, addr="GPIB::15", parent=None):
super(TemperatureController, self).__init__(parent)
self.tempController = VisaConnection(addr)
def __init__(self,addr="GPIB::15",parent=None):
super(TemperatureController, self).__init__(parent)
self.tempController=VisaConnection(addr)
