Source code for spinnman.messages.scp.impl.write_fpga_register
# Copyright (c) 2015 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.overrides import overrides
from spinnman.messages.scp.abstract_messages import (
AbstractSCPRequest, BMPRequest, BMPOKResponse)
from spinnman.messages.scp import SCPRequestHeader
from spinnman.messages.scp.enums import SCPCommand
_ONE_WORD = struct.Struct("<I")
# pylint: disable=wrong-spelling-in-docstring
class WriteFPGARegister(BMPRequest[BMPOKResponse]):
"""
A request for writing a word to a FPGA (SPI) register.
See the SpI/O project's spinnaker_fpga design's `README`_ for a listing
of FPGA registers. The SpI/O project can be found on GitHub at:
https://github.com/SpiNNakerManchester/spio/
.. _README: https://github.com/SpiNNakerManchester/spio/\
blob/master/designs/spinnaker_fpgas/README.md#spi-interface
"""
__slots__ = ()
def __init__(self, fpga_num: int, address: int, value: int, board: int):
"""
:param int fpga_num: FPGA number (0, 1 or 2) to communicate with.
:param int address: Register address to read or write to
(will be rounded down to the nearest 32-bit word boundary).
:param int value: A 32-bit int value to write to the register
"""
super().__init__(
board,
SCPRequestHeader(command=SCPCommand.CMD_LINK_WRITE),
argument_1=address & (~0x3), argument_2=4, argument_3=fpga_num,
data=_ONE_WORD.pack(value))
[docs]
@overrides(AbstractSCPRequest.get_scp_response)
def get_scp_response(self) -> BMPOKResponse:
return BMPOKResponse(
"Send FPGA register write", SCPCommand.CMD_LINK_WRITE)