Source code for spinnman.messages.eieio.data_messages.key_data_element
# 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.exceptions import SpinnmanInvalidParameterException
from spinnman.messages.eieio import EIEIOType
from .abstract_data_element import AbstractDataElement
_ONE_SHORT = struct.Struct("<H")
_ONE_WORD = struct.Struct("<I")
class KeyDataElement(AbstractDataElement):
"""
A data element that contains just a key.
"""
__slots__ = "_key",
def __init__(self, key: int):
self._key = key
@property
def key(self) -> int:
"""
The key value passed into the init.
:rtype: int
"""
return self._key
[docs]
@overrides(AbstractDataElement.get_bytestring)
def get_bytestring(self, eieio_type: EIEIOType) -> bytes:
if eieio_type.payload_bytes != 0:
raise SpinnmanInvalidParameterException(
"eieio_type", eieio_type,
"The type specifies a payload, but this element has no"
" payload")
if eieio_type == EIEIOType.KEY_16_BIT:
return _ONE_SHORT.pack(self._key)
elif eieio_type == EIEIOType.KEY_32_BIT:
return _ONE_WORD.pack(self._key)
else:
raise SpinnmanInvalidParameterException(
"eieio_type", eieio_type, "Unknown type")
def __str__(self):
return f"KeyDataElement:0x{self._key:x}"
def __repr__(self):
return self.__str__()