Source code for spinnman.messages.eieio.command_messages.host_data_read_ack
# Copyright (c) 2017-2019 The University of Manchester
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import struct
from .eieio_command_message import EIEIOCommandMessage
from .eieio_command_header import EIEIOCommandHeader
from spinnman.constants import EIEIO_COMMAND_IDS
_PATTERN_B = struct.Struct("<B")
[docs]class HostDataReadAck(EIEIOCommandMessage):
""" Packet sent by the host computer to the SpiNNaker system in the\
context of the buffering output technique to signal that the host has\
received a request to read data
"""
__slots__ = [
"_sequence_no"]
def __init__(self, sequence_no):
super(HostDataReadAck, self).__init__(EIEIOCommandHeader(
EIEIO_COMMAND_IDS.HOST_DATA_READ_ACK))
self._sequence_no = sequence_no
@property
def sequence_no(self):
return self._sequence_no
[docs] @staticmethod
def from_bytestring(command_header, data, offset): # @UnusedVariable
sequence_no = _PATTERN_B.unpack_from(data, offset)[0]
return HostDataReadAck(sequence_no)
@property
def bytestring(self):
byte_string = super(HostDataReadAck, self).bytestring
byte_string += _PATTERN_B.pack(self.sequence_no)
return byte_string