def fetch(filename, nevents, nsequence):
'''
Fetch and save waveform traces from the oscilloscope.
'''
scope = LeCroyScope(config.ip, timeout=config.timeout)
scope.clear()
scope.set_sequence_mode(nsequence)
channels = scope.get_channels()
# print(channels)
settings = scope.get_settings()
# print(settings)
if b'ON' in settings['SEQUENCE']:
sequence_count = int(settings['SEQUENCE'].split(',')[1])
else:
sequence_count = 1
if nsequence != sequence_count:
print('Could not configure sequence mode properly')
if sequence_count != 1:
print('Using sequence mode with %i traces per aquisition' %
sequence_count)
current_dim = {}
for channel in channels:
wave_desc = scope.get_wavedesc(channel)
current_dim[channel] = wave_desc['wave_array_count'] // sequence_count
try:
i = 0
while i < nevents:
print('\rfetching event: %i' % i)
sys.stdout.flush()
try:
scope.trigger()
for channel in channels:
wave_desc, wave_array = scope.get_waveform(channel)
print("wave_array = ", wave_array)
num_samples = wave_desc[
'wave_array_count'] // sequence_count
if current_dim[channel] < num_samples:
current_dim[channel] = num_samples
traces = wave_array.reshape(
sequence_count, wave_array.size // sequence_count)
#necessary because h5py does not like indexing and this is the fastest (and man is it slow) way
scratch = numpy.zeros((current_dim[channel], ),
dtype=wave_array.dtype)
except (socket.error, struct.error) as e:
print('\n' + str(e))
scope.clear()
continue
i += sequence_count
except KeyboardInterrupt:
print('\rUser interrupted fetch early')
finally:
print('\r')
scope.clear()
return i
def fetch(filename, nevents, nsequence):
'''
Fetch and save waveform traces from the oscilloscope.
'''
scope = LeCroyScope(config.ip, timeout=config.timeout)
scope.clear()
scope.set_sequence_mode(nsequence)
channels = scope.get_channels()
settings = scope.get_settings()
if 'ON' in settings['SEQUENCE']:
sequence_count = int(settings['SEQUENCE'].split(',')[1])
else:
sequence_count = 1
if nsequence != sequence_count:
print 'Could not configure sequence mode properly'
if sequence_count != 1:
print 'Using sequence mode with %i traces per aquisition' % sequence_count
f = h5py.File(filename, 'w')
for command, setting in settings.items():
f.attrs[command] = setting
current_dim = {}
for channel in channels:
wave_desc = scope.get_wavedesc(channel)
current_dim[channel] = wave_desc['wave_array_count'] // sequence_count
f.create_dataset("c%i_samples" % channel,
(nevents, current_dim[channel]),
dtype=wave_desc['dtype'],
compression='gzip',
maxshape=(nevents, None))
for key, value in wave_desc.items():
try:
f["c%i_samples" % channel].attrs[key] = value
except ValueError:
pass
f.create_dataset("c%i_vert_offset" % channel, (nevents, ), dtype='f8')
f.create_dataset("c%i_vert_scale" % channel, (nevents, ), dtype='f8')
f.create_dataset("c%i_horiz_offset" % channel, (nevents, ), dtype='f8')
f.create_dataset("c%i_horiz_scale" % channel, (nevents, ), dtype='f8')
f.create_dataset("c%i_num_samples" % channel, (nevents, ), dtype='f8')
try:
i = 0
while i < nevents:
print '\rfetching event: %i' % i,
sys.stdout.flush()
try:
scope.trigger()
for channel in channels:
wave_desc, wave_array = scope.get_waveform(channel)
num_samples = wave_desc[
'wave_array_count'] // sequence_count
if current_dim[channel] < num_samples:
current_dim[channel] = num_samples
f['c%i_samples' % channel].resize(
current_dim[channel], 1)
traces = wave_array.reshape(
sequence_count, wave_array.size // sequence_count)
#necessary because h5py does not like indexing and this is the fastest (and man is it slow) way
scratch = numpy.zeros((current_dim[channel], ),
dtype=wave_array.dtype)
for n in xrange(0, sequence_count):
scratch[0:num_samples] = traces[
n] #'fast' copy to right size
f['c%i_samples' %
channel][i + n] = scratch #'fast' add to dataset
f['c%i_num_samples' % channel][i + n] = num_samples
f['c%i_vert_offset' %
channel][i + n] = wave_desc['vertical_offset']
f['c%i_vert_scale' %
channel][i + n] = wave_desc['vertical_gain']
f['c%i_horiz_offset' %
channel][i + n] = -wave_desc['horiz_offset']
f['c%i_horiz_scale' %
channel][i + n] = wave_desc['horiz_interval']
except (socket.error, struct.error) as e:
print '\n' + str(e)
scope.clear()
continue
i += sequence_count
except KeyboardInterrupt:
print '\rUser interrupted fetch early'
finally:
print '\r',
f.close()
scope.clear()
return i
def fetch(filename, nevents, nsequence):
'''
Fetch and save waveform traces from the oscilloscope.
'''
scope = LeCroyScope(config.ip, timeout=config.timeout)
scope.clear()
scope.set_sequence_mode(nsequence)
channels = scope.get_channels()
settings = scope.get_settings()
if 'ON' in settings['SEQUENCE']:
sequence_count = int(settings['SEQUENCE'].split(',')[1])
else:
sequence_count = 1
if nsequence != sequence_count:
print 'Could not configure sequence mode properly'
if sequence_count != 1:
print 'Using sequence mode with %i traces per aquisition' % sequence_count
f = h5py.File(filename, 'w')
for command, setting in settings.items():
f.attrs[command] = setting
current_dim = {}
for channel in channels:
wave_desc = scope.get_wavedesc(channel)
current_dim[channel] = wave_desc['wave_array_count']//sequence_count
f.create_dataset("c%i_samples"%channel, (nevents,current_dim[channel]), dtype=wave_desc['dtype'], compression='gzip', maxshape=(nevents,None))
for key, value in wave_desc.items():
try:
f["c%i_samples"%channel].attrs[key] = value
except ValueError:
pass
f.create_dataset("c%i_vert_offset"%channel, (nevents,), dtype='f8')
f.create_dataset("c%i_vert_scale"%channel, (nevents,), dtype='f8')
f.create_dataset("c%i_horiz_offset"%channel, (nevents,), dtype='f8')
f.create_dataset("c%i_horiz_scale"%channel, (nevents,), dtype='f8')
f.create_dataset("c%i_num_samples"%channel, (nevents,), dtype='f8')
try:
i = 0
while i < nevents:
print '\rfetching event: %i' % i,
sys.stdout.flush()
try:
scope.trigger()
for channel in channels:
wave_desc,wave_array = scope.get_waveform(channel)
num_samples = wave_desc['wave_array_count']//sequence_count
if current_dim[channel] < num_samples:
current_dim[channel] = num_samples
f['c%i_samples'%channel].resize(current_dim[channel],1)
traces = wave_array.reshape(sequence_count, wave_array.size//sequence_count)
#necessary because h5py does not like indexing and this is the fastest (and man is it slow) way
scratch = numpy.zeros((current_dim[channel],),dtype=wave_array.dtype)
for n in xrange(0,sequence_count):
scratch[0:num_samples] = traces[n] #'fast' copy to right size
f['c%i_samples'%channel][i+n] = scratch #'fast' add to dataset
f['c%i_num_samples'%channel][i+n] = num_samples
f['c%i_vert_offset'%channel][i+n] = wave_desc['vertical_offset']
f['c%i_vert_scale'%channel][i+n] = wave_desc['vertical_gain']
f['c%i_horiz_offset'%channel][i+n] = -wave_desc['horiz_offset']
f['c%i_horiz_scale'%channel][i+n] = wave_desc['horiz_interval']
except (socket.error, struct.error) as e:
print '\n' + str(e)
scope.clear()
continue
i += sequence_count
except KeyboardInterrupt:
print '\rUser interrupted fetch early'
finally:
print '\r',
f.close()
scope.clear()
return i
