def __init__(self):
self._dev = usb.core.find(idVendor=0x2457, idProduct=0x101E)
if self._dev is None:
raise _OOError('No OceanOptics USB2000+ spectrometer found!')
else:
print('*NOTE*: Currently the first device matching the '
'Vendor/Product id is used')
# This information comes from the OEM-Datasheet
# "http://www.oceanoptics.com/technical"
# "/engineering/OEM%20Data%20Sheet%20--%20USB2000+.pdf"
self._EP1_out = 0x01
self._EP1_in = 0x81
self._EP2_in = 0x82
self._EP6_in = 0x86
self._EP1_in_size = 64
self._EP2_in_size = 512
self._EP6_in_size = 512
# This part makes the initialization a little bit more robust
self._dev.set_configuration()
self._initialize()
#<robust>#
for i in range(10):
try:
self._usbcomm = self._query_status()['usb_speed']
break
except usb.core.USBError:
pass
else:
raise _OOError('Initialization USBCOM')
self.integration_time(1000) # sets self._it
for i in range(10):
try:
self._request_spectrum()
break
except:
pass
else:
raise _OOError('Initialization SPECTRUM')
#</robust>#
self._wl = self._get_wavelength_calibration()
self._nl = self._get_nonlinearity_calibration()
self._st = self._get_saturation_calibration()
self.Serial = self._get_serial()
def __init__(self):
self._dev = usb.core.find(idVendor=0x2457, idProduct=0x101E)
if self._dev is None:
raise _OOError('No OceanOptics USB2000+ spectrometer found!')
else:
print ('*NOTE*: Currently the first device matching the '
'Vendor/Product id is used')
# This information comes from the OEM-Datasheet
# "http://www.oceanoptics.com/technical"
# "/engineering/OEM%20Data%20Sheet%20--%20USB2000+.pdf"
self._EP1_out = 0x01
self._EP1_in = 0x81
self._EP2_in = 0x82
self._EP6_in = 0x86
self._EP1_in_size = 64
self._EP2_in_size = 512
self._EP6_in_size = 512
# This part makes the initialization a little bit more robust
self._dev.set_configuration()
self._initialize()
#<robust>#
for i in range(10):
try:
self._usbcomm = self._query_status()['usb_speed']
break
except usb.core.USBError: pass
else: raise _OOError('Initialization USBCOM')
self.integration_time(1000) # sets self._it
for i in range(10):
try:
self._request_spectrum()
break
except: pass
else: raise _OOError('Initialization SPECTRUM')
#</robust>#
self._wl = self._get_wavelength_calibration()
self._nl = self._get_nonlinearity_calibration()
self._st = self._get_saturation_calibration()
self.Serial = self._get_serial()
def _request_spectrum(self):
""" 0x09 request spectra """
# XXX: 100000 was an arbitary choice. Should probably be a little less than the USB timeout
self._dev.write(self._EP1_out, struct.pack('<B', 0x09))
time.sleep( max(self._it - 100000, 0) * 1e-6 )
if self._usbcomm == 0x80: #HIGHSPEED
ret = [self._dev.read(self._EP2_in, 512) for _ in range(8)]
else: # _usbcomm == 0x00 #FULLSPEED
ret = [self._dev.read(self._EP2_in, 64) for _ in range(66)]
ret = sum(ret[1:], ret[0])
spectrum = struct.unpack('<'+'h'*2048, ret)
sync = self._dev.read(self._EP2_in, 1)
if sync[0] != 0x69:
raise _OOError('request_spectrum: Wrong answer')
return spectrum
def _request_spectrum(self):
""" 0x09 request spectra """
# XXX: 100000 was an arbitary choice. Should probably be a little less than the USB timeout
self._dev.write(self._EP1_out, struct.pack('<B', 0x09))
time.sleep( max(self._it - 100000, 0) * 1e-6 )
if self._usbcomm == 0x80: #HIGHSPEED
ret = [self._dev.read(self._EP2_in, 512) for _ in range(8)]
else: # _usbcomm == 0x00 #FULLSPEED
ret = [self._dev.read(self._EP2_in, 64) for _ in range(64)]
ret = sum(ret[1:], ret[0])
spectrum = struct.unpack('<'+'h'*2048, ret)
sync = self._dev.read(self._EP2_in, 1)
if sync[0] != 0x69:
raise _OOError('request_spectrum: Wrong answer')
return spectrum
def _get_nonlinearity_calibration(self):
if int(self._query_information(14)) != 7:
# Don't care about this right now
raise _OOError('This spectrometer has less correction factors')
return [float(self._query_information(i)) for i in range(6,14)]
def _get_nonlinearity_calibration(self):
if int(self._query_information(14)) != 7:
# Don't care about this right now
raise _OOError('This spectrometer has less correction factors')
return [float(self._query_information(i)) for i in range(6,14)]
