def __init__(self, device): """ Initializes the ITC class. It depends on an visa device Arguments: device -- (visa.instrument) a GPIB instrument is required """ self.__lcr = device self.__lcr.term_chars = '\r' # needed for error free communication gpib.config(self.__lcr.device, gpib.IbcEOSchar, ord('\r')) # use REOS und XEOS gpib.config(self.__lcr.device, gpib.IbcEOSrd, 0x800 | 0x400) # Setup the device to work as needed for the following functions self.clear() # Clears the GPIB Bus to prevent problems in communication. self.__lcr.write("FORM ASCII") # Set data output format to ASCii self.__lcr.write("TRIG:SOUR BUS") # Set trigger to listen only on gpib-bus self.__lcr.write("INIT:CONT ON") # Set the system to continuously wait for the next trigger # Load a list of allowed frequency vaules for the device self.__frequency_list = np.loadtxt('HP4284A_LCRMeter_frequency_table.par') # Set a list of all possible meaurement settings self.__measurement_ident_list = ['CPD', 'CPQ', 'CPG', 'CPRP', 'CSD', 'CSQ', 'CSRS','LPQ', 'LPD', 'LPG', 'LPRP', 'LSD','LSQ', 'LSRS', 'RX', 'ZTD', 'ZTR', 'GB', 'YTD', 'YTR'] # Set variables important for the state of the instrument self.high_power_mode = False self.__num_averages = 1 # Has to be preset, because the number averages and the integration time use one LCR-command self.__integration_time = 'MED'
def __init__(self, device): """ Initializes the ILM class. It depends on an visa device Arguments: device -- (visa.instrument) a GPIB instrument is required """ self.ilm = device self.ilm.term_chars = '\r' gpib.config(self.ilm.device, gpib.IbcEOSchar, ord('\r')) # use REOS und XEOS gpib.config(self.ilm.device, gpib.IbcEOSrd, 0x800 | 0x400)
def __init__(self, device): """ Initializes the ITC class. It depends on an visa device Arguments: device -- (visa.instrument) a GPIB instrument is required """ self.itc = device self.itc.term_chars = '\r' # needed for error free communication gpib.config(self.itc.device, gpib.IbcEOSchar, ord('\r')) # use REOS und XEOS gpib.config(self.itc.device, gpib.IbcEOSrd, 0x800 | 0x400)
def __init__(self, address: int = 25): assert (1 <= address <= 32), 'address out of range' self._device_handler = gpib.dev(0, address) gpib.config(self._device_handler, gpib.IbaEOSrd, 1) gpib.config(self._device_handler, gpib.IbaEOSchar, 13)
def initialise_device(handle): # set up device to assert SRQ/RQS gpib.write(handle, "*CLS") # Clear status registers gpib.write(handle, "*SRE 32") # Assert SRQ on Event return def show_devid(handle): # Show device ID print query(handle, "*IDN?") return print gpib.version() # Show package version ud = gpib.dev(board, device) # Open the device gpib.config(board, gpib.IbcAUTOPOLL, 1) # Enable automatic serial polling gpib.config(ud, gpib.IbcTMO, gpib.T30s) # Set timeout to 30 seconds show_devid(ud) initialise_device(ud) gpib.write(handle, "*TST;*OPC") # Selftest and request OPC event # Wait for Timeout or Request Service on device sta = gpib.wait(ud, gpib.TIMO | gpib.RQS) if (sta & gpib.TIMO) != 0: print "Timed out" else: print "Device asserted RQS" stb = gpib.serial_poll(ud) # Read status byte print "stb = %#x" % (stb) if (stb & gpib.IbStbESB) != 0: # Check for Event Status bit esr = int(query(ud, "ESR?")) # Read Event Status Register if (esr & 1) != 0: # Check for operation completed
response = gpib.read(handle,numbytes) response = response.rstrip("\r\n") return response def initialise_device(handle): # set up device to assert SRQ/RQS gpib.write(handle,"*CLS") # Clear status registers gpib.write(handle,"*SRE 32") # Assert SRQ on OPC return def show_devid(handle): # Show device ID print query(handle,"*IDN?") return print gpib.version() # Show package version ud = gpib.dev(board,device) # Open the device gpib.config(board,gpib.IbcTMO, gpib.T30s) # Set timeout to 30 seconds show_devid(ud); initialise_device(ud); gpib.write(handle,"*TST;*OPC") # Initiate selftest and request OPC # Wait for Timeout or Service Request on board sta = gpib.wait(board, gpib.TIMO | gpib.SRQI) if (sta & gpib.TIMO) != 0: print "Timed out" else: print "SRQ asserted " # For each device which might pull SRQ stb = gpib.serial_poll(ud) # Read status byte print "stb = %#x"%(stb) if (stb & gpib.IbStbRQS) != 0: # Check for RQS bit print "Device asserted RQS" if (stb & gpib.IbStbESB) != 0: # Check for Event Status bit
def config(self, option, value): self.res = gpib.config(self.id, option, value) return self.res
def config(self, option, value): self.res = gpib.config(self.id, option, value) return self.res