Source code for spinnman.messages.eieio.command_messages.host_send_sequenced_data
# Copyright (c) 2015 The University of Manchester
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import struct
from .eieio_command_message import EIEIOCommandMessage
from .eieio_command_header import EIEIOCommandHeader
from spinnman.constants import EIEIO_COMMAND_IDS
from spinnman.messages.eieio.create_eieio_data import read_eieio_data_message
_PATTERN_BB = struct.Struct("<BB")
[docs]class HostSendSequencedData(EIEIOCommandMessage):
"""
Packet sent from the host to the SpiNNaker system in the context of
buffering input mechanism to identify packet which needs to be stored
in memory for future use.
"""
__slots__ = [
"_eieio_data_message",
"_region_id",
"_sequence_no"]
def __init__(self, region_id, sequence_no, eieio_data_message):
super().__init__(EIEIOCommandHeader(
EIEIO_COMMAND_IDS.HOST_SEND_SEQUENCED_DATA))
self._region_id = region_id
self._sequence_no = sequence_no
self._eieio_data_message = eieio_data_message
@property
def region_id(self):
return self._region_id
@property
def sequence_no(self):
return self._sequence_no
@property
def eieio_data_message(self):
return self._eieio_data_message
[docs] @staticmethod
def get_min_packet_length():
return 4
[docs] @staticmethod
def from_bytestring(command_header, data, offset): # @UnusedVariable
region_id, sequence_no = _PATTERN_BB.unpack_from(data, offset)
eieio_data_message = read_eieio_data_message(data, offset)
return HostSendSequencedData(
region_id, sequence_no, eieio_data_message)
@property
def bytestring(self):
return (super().bytestring +
_PATTERN_BB.pack(self._region_id, self._sequence_no) +
self._eieio_data_message.bytestring)