def data_packet():
p = Packet()
p.packet_type = Packet.DATA_PACKET
p.chipid = 123
p.channel = 7
p.timestamp = 123456
p.dataword = 120
p.fifo_half_flag = 1
p.assign_parity()
p.chip_key = Key('1-2-123')
p.direction = 1
return p
def test_to_file_v0_0_data_packet(tmpfile, data_packet):
to_file(tmpfile, [data_packet], version='0.0')
f = h5py.File(tmpfile, 'r')
assert len(f['raw_packet']) == 1
row = f['raw_packet'][0]
props = dtype_property_index_lookup['0.0']['raw_packet']
new_packet = Packet()
new_packet.chip_key = row[props['chip_key']]
new_packet.packet_type = row[props['type']]
new_packet.chipid = row[props['chipid']]
new_packet.parity_bit_value = row[props['parity']]
new_packet.channel = row[props['channel']]
new_packet.timestamp = row[props['timestamp']]
new_packet.dataword = row[props['adc_counts']]
new_packet.fifo_half_flag = row[props['fifo_half']]
new_packet.fifo_full_flag = row[props['fifo_full']]
assert new_packet == data_packet
def from_file(filename, version=None, start=None, end=None):
'''
Read the data from the given file into LArPix Packet objects.
:param filename: the name of the file to read
:param version: the format version. Specify this parameter to
enforce a version check. When a specific version such as
``'1.5'`` is specified, a ``RuntimeError`` will be raised if the
stored format version number is not an exact match. If a version
is prefixed with ``'~'`` such as ``'~1.5'``, a ``RuntimeError``
will be raised if the stored format version is *incompatible*
with the specified version. Compatible versions are those with
the same major version and at least the same minor version. E.g.
for ``'~1.5'``, versions between v1.5 and v2.0 are compatible.
If unspecified or ``None``, will use the stored format version.
:param start: the index of the first row to read
:param end: the index after the last row to read (same semantics as
Python ``range``)
:returns packet_dict: a dict with keys ``'packets'`` containing a
list of packet objects; and ``'created'``, ``'modified'``, and
``'version'``, containing the file metadata.
'''
with h5py.File(filename, 'r') as f:
file_version = f['_header'].attrs['version']
if version is None:
version = file_version
elif version[0] == '~':
file_major, _, file_minor = file_version.split('.')
version_major, _, version_minor = version.split('.')
version_major = version_major[1:]
if (file_major != version_major or file_minor < version_minor):
raise RuntimeError('Incompatible versions: existing: %s, '
'specified: %s' % (file_version, version))
else:
version = file_version
elif version == file_version:
pass
else:
raise RuntimeError('Incompatible versions: existing: %s, '
'specified: %s' % (file_version, version))
if version not in dtypes:
raise RuntimeError('Unknown version: %s' % version)
if version == '0.0':
dset_name = 'raw_packet'
else:
dset_name = 'packets'
message_dset_name = 'messages'
message_props = (
dtype_property_index_lookup[version][message_dset_name])
message_dset = f[message_dset_name]
props = dtype_property_index_lookup[version][dset_name]
packets = []
if start is None and end is None:
dset_iter = f[dset_name]
else:
dset_iter = f[dset_name][start:end]
for row in dset_iter:
if row[props['type']] == 4:
packets.append(TimestampPacket(row[props['timestamp']]))
continue
if row[props['type']] == 5:
index = row[props['counter']]
message_row = message_dset[index]
message = message_row[message_props['message']].decode()
timestamp = row[props['timestamp']]
packets.append(MessagePacket(message, timestamp))
continue
p = Packet()
p.chip_key = row[props['chip_key']]
p.packet_type = row[props['type']]
p.chipid = row[props['chipid']]
p.parity_bit_value = row[props['parity']]
if p.packet_type == Packet.DATA_PACKET:
p.channel = row[props['channel']]
p.timestamp = row[props['timestamp']]
p.dataword = row[props['adc_counts']]
p.fifo_half_flag = row[props['fifo_half']]
p.fifo_full_flag = row[props['fifo_full']]
elif p.packet_type == Packet.TEST_PACKET:
p.counter = row[props['counter']]
elif (p.packet_type == Packet.CONFIG_WRITE_PACKET
or p.packet_type == Packet.CONFIG_READ_PACKET):
p.register_address = row[props['register']]
p.register_data = row[props['value']]
if version != '0.0':
p.direction = row[props['direction']]
packets.append(p)
return {
'packets': packets,
'created': f['_header'].attrs['created'],
'modified': f['_header'].attrs['modified'],
'version': f['_header'].attrs['version'],
}