Source code for spinnman.messages.scp.abstract_messages.scp_request
# Copyright (c) 2014 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 spinn_utilities.abstract_base import AbstractBase, abstractmethod
_THREE_WORDS = struct.Struct("<III")
[docs]class AbstractSCPRequest(object, metaclass=AbstractBase):
"""
Represents an Abstract SCP Request.
"""
__slots__ = [
"_argument_1",
"_argument_2",
"_argument_3",
"_data",
"_scp_request_header",
"_sdp_header"]
DEFAULT_DEST_X_COORD = 255
DEFAULT_DEST_Y_COORD = 255
def __init__(self, sdp_header, scp_request_header, argument_1=None,
argument_2=None, argument_3=None, data=None):
"""
:param SDPHeader sdp_header: The SDP header of the request
:param SCPRequestHeader scp_request_header:
The SCP header of the request
:param int argument_1:
The first argument, or `None` if no first argument
:param int argument_2:
The second argument, or `None` if no second argument
:param int argument_3:
The third argument, or `None` if no third argument
:param data: The optional data, or `None` if no data
:type data: bytearray or bytes or None
"""
# pylint: disable=too-many-arguments
self._sdp_header = sdp_header
self._scp_request_header = scp_request_header
self._argument_1 = argument_1
self._argument_2 = argument_2
self._argument_3 = argument_3
self._data = data
@property
def sdp_header(self):
"""
The SDP header of the message.
:rtype: SDPHeader
"""
return self._sdp_header
@property
def scp_request_header(self):
"""
The SCP request header of the message.
:rtype: SCPRequestHeader
"""
return self._scp_request_header
@property
def argument_1(self):
"""
The first argument, or `None` if no first argument.
:rtype: int
"""
return self._argument_1
@property
def argument_2(self):
"""
The second argument, or `None` if no second argument.
:rtype: int
"""
return self._argument_2
@property
def argument_3(self):
"""
The third argument, or `None` if no third argument.
:rtype: int
"""
return self._argument_3
@property
def data(self):
"""
The data, or `None` if no data.
:rtype: bytearray
"""
return self._data
@property
def bytestring(self):
"""
The request as a bytestring.
:rtype: bytes
"""
data = (self._sdp_header.bytestring +
self._scp_request_header.bytestring)
data += _THREE_WORDS.pack(
0 if self._argument_1 is None else self._argument_1,
0 if self._argument_2 is None else self._argument_2,
0 if self._argument_3 is None else self._argument_3)
if self._data is not None:
data += bytes(self._data)
return data
def __repr__(self):
# Default is to return just the command, but can be overridden
return str(self._scp_request_header.command)
def __str__(self):
return self.__repr__()
[docs] @abstractmethod
def get_scp_response(self):
"""
Get an SCP response message to be used to process any response
received.
:return: An SCP response, or `None` if no response is required
:rtype: AbstractSCPResponse
"""