Source code for spinnman.messages.scp.impl.fixed_route_read
# 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 spinn_utilities.overrides import overrides
from spinn_machine import FixedRouteEntry
from spinnman.exceptions import SpinnmanUnexpectedResponseCodeException
from spinnman.messages.scp import SCPRequestHeader
from spinnman.messages.scp.abstract_messages import (
AbstractSCPRequest, AbstractSCPResponse)
from spinnman.messages.scp.enums import SCPCommand, SCPResult
from spinnman.messages.sdp import SDPHeader, SDPFlag
_ONE_WORD = struct.Struct("<I")
[docs]class FixedRouteRead(AbstractSCPRequest):
__slots__ = []
def __init__(self, x, y, app_id):
""" Sets a fixed route entry
:param x: The x-coordinate of the chip, between 0 and 255,\
this is not checked due to speed restrictions
:type x: int
:param y: The y-coordinate of the chip, between 0 and 255\
this is not checked due to speed restrictions
:type y: int
:param app_id: The ID of the application with which to associate the\
routes. If not specified, defaults to 0.
:type app_id: int
:raise spinnman.exceptions.SpinnmanInvalidParameterException:\
* If x is out of range
* If y is out of range
"""
super(FixedRouteRead, self).__init__(
SDPHeader(
flags=SDPFlag.REPLY_EXPECTED, destination_port=0,
destination_cpu=0, destination_chip_x=x,
destination_chip_y=y),
SCPRequestHeader(command=SCPCommand.CMD_RTR),
argument_1=(app_id << 8) | 3, argument_2=1 << 31)
[docs] @overrides(AbstractSCPRequest.get_scp_response)
def get_scp_response(self):
return _FixedRouteResponse()
class _FixedRouteResponse(AbstractSCPResponse):
"""
response for the fixed route read
"""
__slots__ = [
# the fixed route router entry
"_route"]
def __init__(self):
super(_FixedRouteResponse, self).__init__()
self._route = None
@overrides(AbstractSCPResponse.read_data_bytestring)
def read_data_bytestring(self, data, offset):
result = self.scp_response_header.result
if result != SCPResult.RC_OK:
raise SpinnmanUnexpectedResponseCodeException(
"Read Fixed Route entry", "CMD_RTR", result.name)
self._route = _ONE_WORD.unpack_from(data, offset)[0]
@property
def route(self):
processor_ids = list()
for processor_id in range(0, 26):
if self._route & (1 << (6 + processor_id)) != 0:
processor_ids.append(processor_id)
link_ids = list()
for link_id in range(0, 6):
if self._route & (1 << link_id) != 0:
link_ids.append(link_id)
return FixedRouteEntry(processor_ids, link_ids)