Source code for spinnman.messages.eieio.create_eieio_command
# 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/>.
from spinnman.messages.eieio.command_messages import (
PaddingRequest, EventStopRequest, StopRequests, StartRequests,
SpinnakerRequestBuffers, HostSendSequencedData, SpinnakerRequestReadData,
HostDataRead, EIEIOCommandHeader, EIEIOCommandMessage,
DatabaseConfirmation)
from spinnman.constants import EIEIO_COMMAND_IDS
[docs]def read_eieio_command_message(data, offset):
""" Reads the content of an EIEIO command message and returns an object\
identifying the command which was contained in the packet, including\
any parameter, if required by the command
:param data: data received from the network as a bytestring
:type data: str
:param offset: offset at which the parsing operation should start
:type offset: int
:return: an object which inherits from EIEIOCommandMessage which contains\
parsed data received from the network
:rtype: \
:py:class:`spinnman.messages.eieio.command_messages.EIEIOCommandMessage`
"""
command_header = EIEIOCommandHeader.from_bytestring(data, offset)
command_number = command_header.command
if command_number == EIEIO_COMMAND_IDS.DATABASE_CONFIRMATION.value:
return DatabaseConfirmation.from_bytestring(
command_header, data, offset + 2)
# Fill in buffer area with padding
elif command_number == EIEIO_COMMAND_IDS.EVENT_PADDING.value:
return PaddingRequest()
# End of all buffers, stop execution
elif command_number == EIEIO_COMMAND_IDS.EVENT_STOP.value:
return EventStopRequest()
# Stop complaining that there is SDRAM free space for buffers
elif command_number == EIEIO_COMMAND_IDS.STOP_SENDING_REQUESTS.value:
return StopRequests()
# Start complaining that there is SDRAM free space for buffers
elif command_number == EIEIO_COMMAND_IDS.START_SENDING_REQUESTS.value:
return StartRequests()
# SpiNNaker requesting new buffers for spike source population
elif command_number == EIEIO_COMMAND_IDS.SPINNAKER_REQUEST_BUFFERS.value:
return SpinnakerRequestBuffers.from_bytestring(
command_header, data, offset + 2)
# Buffers being sent from host to SpiNNaker
elif command_number == EIEIO_COMMAND_IDS.HOST_SEND_SEQUENCED_DATA.value:
return HostSendSequencedData.from_bytestring(
command_header, data, offset + 2)
# Buffers available to be read from a buffered out vertex
elif command_number == EIEIO_COMMAND_IDS.SPINNAKER_REQUEST_READ_DATA.value:
return SpinnakerRequestReadData.from_bytestring(
command_header, data, offset + 2)
# Host confirming data being read form SpiNNaker memory
elif command_number == EIEIO_COMMAND_IDS.HOST_DATA_READ.value:
return HostDataRead.from_bytestring(
command_header, data, offset + 2)
return EIEIOCommandMessage(command_header, data, offset + 2)