Source code for spinnman.messages.scp.impl.write_memory
# 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.
from spinn_utilities.overrides import overrides
from spinn_utilities.typing.coords import XYP
from spinnman.constants import address_length_dtype
from spinnman.messages.scp import SCPRequestHeader
from spinnman.messages.scp.abstract_messages import AbstractSCPRequest
from spinnman.messages.scp.enums import SCPCommand
from spinnman.messages.sdp import SDPFlag, SDPHeader
from .check_ok_response import CheckOKResponse
class WriteMemory(AbstractSCPRequest[CheckOKResponse]):
"""
A request to write memory on a chip.
"""
__slots__ = "_data_to_write",
def __init__(self, coordinates: XYP, base_address: int, data: bytes):
"""
:param tuple(int,int,int) coordinates:
The coordinates of the chip, X and Y between 0 and 255, and P
between 0 and 17 (normally 0 when writing to SDRAM; may be other
values when writing to ITCM or DTCM);
these are not checked due to speed restrictions
:param int base_address: The base_address to start writing to
the base address is not checked to see if its not valid
:param data: between 1 and 256 bytes of data to write;
this is not checked due to speed restrictions
:type data: bytearray or bytes
"""
size = len(data)
x, y, cpu = coordinates
super().__init__(
SDPHeader(
flags=SDPFlag.REPLY_EXPECTED, destination_port=0,
destination_cpu=cpu, destination_chip_x=x,
destination_chip_y=y),
SCPRequestHeader(command=SCPCommand.CMD_WRITE),
argument_1=base_address, argument_2=size,
argument_3=address_length_dtype[
(base_address % 4), (size % 4)].value,
data=None)
self._data_to_write = data
@property
def bytestring(self) -> bytes:
return super().bytestring + bytes(self._data_to_write)
[docs]
@overrides(AbstractSCPRequest.get_scp_response)
def get_scp_response(self) -> CheckOKResponse:
return CheckOKResponse("write to memory", "CMD_WRITE")