Source code for spinnman.processes.read_memory_process

# 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 functools
from spinnman.messages.scp.impl import ReadLink, ReadMemory
from .abstract_multi_connection_process import AbstractMultiConnectionProcess
from spinnman.constants import UDP_MESSAGE_MAX_SIZE


[docs]class ReadMemoryProcess(AbstractMultiConnectionProcess): """ A process for reading memory on a SpiNNaker chip. """ __slots__ = [ "_view"] def __init__(self, connection_selector): """ :param connection_selector: :type connection_selector: AbstractMultiConnectionProcessConnectionSelector """ super().__init__(connection_selector) self._view = None def __handle_response(self, offset, response): self._view[offset:offset + response.length] = response.data[ response.offset:response.offset + response.length]
[docs] def read_memory(self, x, y, p, base_address, length): """ :param int x: :param int y: :param int p: :param int base_address: :param int length: :rtype: bytearray """ return self._read_memory( base_address, length, functools.partial(ReadMemory, x=x, y=y, cpu=p))
def _read_memory(self, base_address, length, packet_class): data = bytearray(length) self._view = memoryview(data) n_bytes = length offset = 0 while n_bytes > 0: bytes_to_get = min((n_bytes, UDP_MESSAGE_MAX_SIZE)) self._send_request( packet_class( base_address=base_address + offset, size=bytes_to_get), functools.partial(self.__handle_response, offset)) n_bytes -= bytes_to_get offset += bytes_to_get self._finish() self.check_for_error() return data