Source code for spinnman.messages.eieio.create_eieio_command
# 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.
from spinnman.messages.eieio.command_messages import (
PaddingRequest, EventStopRequest, StopRequests, StartRequests,
SpinnakerRequestBuffers, HostSendSequencedData, SpinnakerRequestReadData,
HostDataRead, EIEIOCommandHeader, EIEIOCommandMessage,
NotificationProtocolDatabaseLocation)
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 bytes data: data received from the network as a bytestring
:param int offset: offset at which the parsing operation should start
:return: an object which inherits from EIEIOCommandMessage which contains
parsed data received from the network
:rtype: EIEIOCommandMessage
"""
command_header = EIEIOCommandHeader.from_bytestring(data, offset)
command_number = command_header.command
if command_number == EIEIO_COMMAND_IDS.DATABASE.value:
return NotificationProtocolDatabaseLocation.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)