Source code for spynnaker.pyNN.models.neuron.structural_plasticity.synaptogenesis.partner_selection.last_neuron_selection

# Copyright (c) 2017 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 .abstract_partner_selection import AbstractPartnerSelection


class LastNeuronSelection(AbstractPartnerSelection):
    """
    Partner selection that picks a random source neuron from the neurons
    that spiked in the last timestep.
    """

    __slots__ = ["__spike_buffer_size"]

    def __init__(self, spike_buffer_size=64):
        """
        :param spike_buffer_size: The size of the buffer for holding spikes
        """
        self.__spike_buffer_size = spike_buffer_size

    @property
    @overrides(AbstractPartnerSelection.vertex_executable_suffix)
    def vertex_executable_suffix(self):
        return "_last_neuron"


[docs]
    @overrides(AbstractPartnerSelection.get_parameters_sdram_usage_in_bytes)
    def get_parameters_sdram_usage_in_bytes(self):
        return 4



[docs]
    @overrides(AbstractPartnerSelection.write_parameters)
    def write_parameters(self, spec):
        spec.write_value(self.__spike_buffer_size)



[docs]
    @overrides(AbstractPartnerSelection.get_parameter_names)
    def get_parameter_names(self):
        return ["spike_buffer_size"]