Source code for spinnman.messages.scp.impl.router_alloc
from spinnman.messages.scp import SCPRequestHeader
from spinnman.messages.scp.abstract_messages \
import AbstractSCPRequest, AbstractSCPResponse
from spinnman.messages.scp.enums \
import AllocFree, SCPCommand, SCPResult
from spinnman.messages.sdp import SDPFlag, SDPHeader
from spinnman.exceptions import SpinnmanUnexpectedResponseCodeException
import struct
[docs]class RouterAlloc(AbstractSCPRequest):
""" An SCP Request to allocate space for routing entries
"""
def __init__(self, x, y, app_id, n_entries):
"""
:param x: The x-coordinate of the chip to allocate on, between 0 and\
255
:type x: int
:param y: The y-coordinate of the chip to allocate on, between 0 and\
255
:type y: int
:param app_id: The id of the application, between 0 and 255
:type app_id: int
:param n_entries: The number of entries to allocate
:type n_entries: int
"""
super(RouterAlloc, 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_ALLOC),
argument_1=(
(app_id << 8) |
AllocFree.ALLOC_ROUTING.value), # @UndefinedVariable
argument_2=n_entries)
[docs] def get_scp_response(self):
return _SCPRouterAllocResponse()
class _SCPRouterAllocResponse(AbstractSCPResponse):
""" An SCP response to a request to allocate router entries
"""
def __init__(self):
"""
"""
super(_SCPRouterAllocResponse, self).__init__()
self._base_address = None
def read_data_bytestring(self, data, offset):
""" See\
:py:meth:`spinnman.messages.scp.abstract_scp_response.AbstractSCPResponse.read_data_bytestring`
"""
result = self.scp_response_header.result
if result != SCPResult.RC_OK:
raise SpinnmanUnexpectedResponseCodeException(
"Router Allocation", "CMD_ALLOC", result.name)
self._base_address = struct.unpack_from("<I", data, offset)[0]
@property
def base_address(self):
""" The base address allocated, or 0 if none
:rtype: int
"""
return self._base_address