def refreshDevices(self):
"""Refresh the list of known devices on this bus.
Currently supported are GPIB devices and GPIB over USB.
"""
try:
addresses = visa.get_instruments_list()
additions = set(addresses) - set(self.devices.keys())
deletions = set(self.devices.keys()) - set(addresses)
for addr in additions:
try:
if addr.startswith('GPIB'):
instName = addr
elif addr.startswith('USB'):
instName = addr + '::INSTR'
else:
continue
instr = visa.instrument(instName, timeout=1.0)
self.devices[addr] = instr
self.sendDeviceMessage('GPIB Device Connect', addr)
except Exception, e:
print 'Failed to add ' + addr + ':' + str(e)
for addr in deletions:
del self.devices[addr]
self.sendDeviceMessage('GPIB Device Disconnect', addr)
def refreshDevices(self):
"""Refresh the list of known devices on this bus.
Currently supported are GPIB devices and GPIB over USB.
"""
try:
addresses = visa.get_instruments_list()
additions = set(addresses) - set(self.devices.keys())
deletions = set(self.devices.keys()) - set(addresses)
for addr in additions:
try:
if addr.startswith('GPIB'):
instName = addr
elif addr.startswith('USB'):
instName = addr + '::INSTR'
else:
continue
instr = visa.instrument(instName, timeout=1.0)
instr.clear()
self.devices[addr] = instr
self.sendDeviceMessage('GPIB Device Connect', addr)
except Exception, e:
print 'Failed to add ' + addr + ':' + str(e)
for addr in deletions:
del self.devices[addr]
self.sendDeviceMessage('GPIB Device Disconnect', addr)
def FindUSBDevices() :
vendors = {'Tektronix' : '0x0699', 'Rigol' : '0x1AB1'}
devices = {'0x0699' : {'0x0366' : 'TDS1012B', '0x0346' : 'AFG3021B', '0x0368' : 'TDS2014B', '0x0367' : 'TDS2012B'}, '0x1AB1' : {'0x0588' : 'DG1022'}}
a = v.get_instruments_list()
# Sort the devices by vendor
vendor_devices = {}
for b in a :
if b.find('USB') > -1 :
bb = s.split(b, '::')
for key in vendors :
if vendors[key] == bb[1] :
if len(bb) > 3 :
sn = ' SN: ' + bb[3]
#print sn, key, vendors[key]
vendor_devices[devices[vendors[key]][bb[2]] + '-' + bb[3]] = v.instrument(b)
else :
vendor_devices[devices[vendors[key]][bb[2]]] = v.instrument(b)
return vendor_devices # This is a dictionary with device-sn keys.
def visaHandle(self, forceReload=False):
"""
Return the VISA handle for this instrument.
If the VISA connection was lost, it reopens the VISA handle.
"""
if forceReload or self._handle is None:
try:
if self._handle is not None:
try:
self._handle.close()
except:
pass
self._handle = None
except:
pass
self._handle = visa.instrument(self._visaAddress)
return self._handle
def test ( self, outfile, s_port, multimeter ):
#Configuracion de puerto serie para leer valores del LVDT
self.ser = serial.Serial( port = s_port,
baudrate = 9600,
parity = serial.PARITY_NONE,
stopbits = 1,
bytesize = 8,
timeout = 2 )
#Configuracion de Multimetro Agilent 33410A paqra leer termocupla
self.multimeter = visa.instrument( multimeter )
self.multimeter.write( '*CLS' )
time.sleep( 0.1 )
self.multimeter.write( 'CONF:VOLT:DC AUTO,MAX' )
time.sleep( 0.5 )
self.multimeter.write( 'INIT' )
time.sleep( 0.5 )
#Otras configuraciones
self.time_stamp = 0
self.savedata = False
self.outfile = outfile
self.start()
def __init__(self, station_info):
eqpt = []
self.stnInst_info = {}
self.station_info = station_info
for key in self.station_info.keys():
if key.startswith('eqpt'):
eqpt.append(key)
print "Eqpt List: %s" %eqpt
self.visaCred = self.station_info[key].split('_')
print "Visa Credentials %s" %self.visaCred
addr = "%s::%s" % (self.visaCred[1], self.visaCred[2])
self.instr = visa.instrument(addr)
if key.endswith('VOA') and self.visaCred[0] == 'JDSU':
self.instrInst = OpticalAttenuator_JDSU(self.instr, self.visaCred)
elif key.endswith('WLM') and self.visaCred[0] == 'HP86120C':
self.instrInst = WLMeter_HP86120C(self.instr)
elif key.endswith('OPM') and self.visaCred[0] == 'HP81635A':
self.instrInst = OpticalPowerMeter_HP81635A(self.instr, self.visaCred)
else:
pass
res = key + "_" + self.station_info[key]
self.stnInst_info[res] = self.instrInst
def test(self, outfile, AG34410A, AG34405A):
#Configuracion de Multimetro Agilent 33410A para leer termocupla
self.termo = visa.instrument(AG34405A)
self.lvdt = visa.Instrument(AG34410A)
self.termo.write('*RST')
self.lvdt.write('*RST')
time.sleep(5)
self.termo.write('CONF:VOLT:DC AUTO')
self.lvdt.write('CONF:VOLT:AC 10')
time.sleep(0.1)
self.lvdt.write('SENS:VOLT:AC:BAND 20')
time.sleep(0.5)
#Otras configuraciones
self.time_stamp = 0
self.savedata = False
self.outfile = outfile
self.errorfile = outfile + '_errorlog.txt'
self.start()
def __init__(self, name, address):
'''
Initializes the Oxford Instruments IPS 120 Magnet Power Supply.
Input:
name (string) : name of the instrument
address (string) : instrument address
number (int) : ISOBUS instrument number
Output:
None
'''
logging.debug(__name__ + ' : Initializing instrument')
Instrument.__init__(self, name, tags=['physical'])
self._address = address
self._visainstrument = visa.instrument(self._address,timeout=20)
self._values = {}
self._visainstrument.term_chars = '\r\n'
#Add parameters
#x,y,z -> enter setpoint
#coordinate system
#sweep mode: rate overall,time to setpoint, fast as possible
#to setpoint
#hold
#to zero
self.add_parameter('coordinatesys', type=types.StringType,
#READ:SYS:VRM:COO
flags=Instrument.FLAG_GETSET | Instrument.FLAG_GET_AFTER_SET,
format_map = {
'CART' : "Cartresian",
'CYL' : "Cyclindrical",
'SPH' : "Spherical",
})
# # channels with prefix
# self.add_parameter('magn', type=types.FloatType,
# flags=Instrument.FLAG_GETSET,
# channels=('X', 'Y', 'Z'))
self.add_parameter('vector', type=types.StringType,
#dependent on coordinate system
#get current magnet vector
#READ:SYS:VRM:VECT
flags=Instrument.FLAG_GETSET | Instrument.FLAG_GET_AFTER_SET,
channels=('X', 'Y', 'Z'))
self.add_parameter('target_vector', type=types.FloatType,
#READ:SYS:VRM:TVEC
flags=Instrument.FLAG_GETSET,
channels=('X', 'Y', 'Z'))
self.add_parameter('max_field_sweep', type=types.StringType,
#max field sweep
#[dBx/dt dBy/dt dBz/dt], tesla/minute
#READ:SYS:VRM:RFMX
flags=Instrument.FLAG_GET)
self.add_parameter('sweep_mode', type=types.StringType,
#READ:SYS:VRM:RVST:MODE
#return string+ asap | time | rate
flags=Instrument.FLAG_GET)
#magnet setpoints
#READ:SYS:VRM:VSET
#self.add_parameter('setpoint', type=types.FloatType,
# flags=Instrument.FLAG_GETSET | Instrument.FLAG_GET_AFTER_SET)
self.add_parameter('activity', type=types.StringType,
#READ:SYS:VRM:ACTN
flags=Instrument.FLAG_GETSET | Instrument.FLAG_GET_AFTER_SET,
format_map = {
'RTOS' : "Sweep to setpoint",
'RTOZ' : "Sweep to zero",
'HOLD' : "Hold",
'IDLE' : 'Idle',
'PERS' : 'Make persistent',
'NPERS': 'Make non-persistent',
'SAFE' : "Safe"})
# Add functions
self.add_function('get_all')
self.get_all()
from pyvisa import visa
from instruments.ThorlabsPM100_meta import *
from jds_ha9 import *
import numpy as np
from matplotlib import pyplot as plt
from time import sleep
#initiate the power meter
inst = visa.instrument('USB0::0x1313::0x8078::PM002229::INSTR',
term_chars='\n',
timeout=1)
pm = ThorlabsPM100Meta(inst)
#initiate the optical attenuator
att = JDSHA9('GPIB::5')
att.set_beam_block(False)
attenuation = np.linspace(5, 50, 20)
#the intial setting takes time
att.set_attenuation_db(attenuation[0])
sleep(1)
power = []
for attn in attenuation:
att.set_attenuation_db(attn)
sleep(0.5)
power.append(pm.read_value())
plt.plot(np.array(attenuation), 10 * np.log10(np.array(power) * 1000), 'o')
plt.xlabel('Attenuation (dB)')
plt.ylabel('Optical Power (dBm)')
plt.title('Attenuation vs. Power')
def __init__(self, name, address):
'''
Initializes the Oxford Instruments IPS 120 Magnet Power Supply.
Input:
name (string) : name of the instrument
address (string) : instrument address
number (int) : ISOBUS instrument number
Output:
None
'''
logging.debug(__name__ + ' : Initializing instrument')
Instrument.__init__(self, name, tags=['physical'])
self._address = address
self._visainstrument = visa.instrument(self._address,timeout=100)
self._values = {}
self._visainstrument.term_chars = '\r\n'
self._x = 0.
self._y = 0.
self._z = 0.
#Add parameters
#x,y,z -> enter setpoint
#coordinate system
#sweep mode: rate overall,time to setpoint, fast as possible
#to setpoint
#hold
#to zero
self.add_parameter('coordinatesys', type=types.StringType,
#READ:SYS:VRM:COO
flags=Instrument.FLAG_GETSET | Instrument.FLAG_GET_AFTER_SET,
format_map = {
'CYL' : "Cylindrical",
'CART' : "Cartesian",
'SPH' : "Spherical",
})
# # channels with prefix
# self.add_parameter('magn', type=types.FloatType,
# flags=Instrument.FLAG_GETSET,
# channels=('X', 'Y', 'Z'))
self.add_parameter('vector', type=types.StringType,
#dependent on coordinate system
#get current magnet vector
#READ:SYS:VRM:VECT
flags=Instrument.FLAG_GETSET | Instrument.FLAG_GET_AFTER_SET,
channels=('X', 'Y', 'Z'))
self.add_parameter('target_vector', type=types.FloatType,
#READ:SYS:VRM:TVEC
flags=Instrument.FLAG_GETSET,
channels=('X', 'Y', 'Z'))
self.add_parameter('max_field_sweep', type=types.StringType,
#max field sweep
#[dBx/dt dBy/dt dBz/dt], tesla/minute
#READ:SYS:VRM:RFMX
flags=Instrument.FLAG_GET)
self.add_parameter('sweep_mode', type=types.StringType,
#READ:SYS:VRM:RVST:MODE
#return string+ asap | time | rate
flags=Instrument.FLAG_GET)
#magnet setpoints
#READ:SYS:VRM:VSET
#self.add_parameter('setpoint', type=types.FloatType,
# flags=Instrument.FLAG_GETSET | Instrument.FLAG_GET_AFTER_SET)
self.add_parameter('activity', type=types.StringType,
#READ:SYS:VRM:ACTN
flags=Instrument.FLAG_GETSET | Instrument.FLAG_GET_AFTER_SET,
format_map = {
'RTOS' : "Sweep to setpoint",
'RTOZ' : "Sweep to zero",
'HOLD' : "Hold",
'IDLE' : 'Idle',
'PERS' : 'Make persistent',
'NPERS': 'Make non-persistent',
'SAFE' : "Safe"})
# Add functions
self.add_function('get_all')
self.get_all()
