Source code for spynnaker.pyNN.models.neuron.threshold_types.threshold_type_static

# 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.
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from spinn_utilities.overrides import overrides
from data_specification.enums import DataType
from .abstract_threshold_type import AbstractThresholdType

V_THRESH = "v_thresh"

UNITS = {V_THRESH: "mV"}


[docs]class ThresholdTypeStatic(AbstractThresholdType): """ A threshold that is a static value. """ __slots__ = ["__v_thresh"] def __init__(self, v_thresh): """ :param v_thresh: :math:`V_{thresh}` :type v_thresh: float, iterable(float), ~pyNN.random.RandomDistribution or (mapping) function """ super().__init__([ DataType.S1615]) # v_thresh self.__v_thresh = v_thresh
[docs] @overrides(AbstractThresholdType.get_n_cpu_cycles) def get_n_cpu_cycles(self, n_neurons): # Just a comparison, but 2 just in case! return 2 * n_neurons
[docs] @overrides(AbstractThresholdType.add_parameters) def add_parameters(self, parameters): parameters[V_THRESH] = self.__v_thresh
[docs] @overrides(AbstractThresholdType.add_state_variables) def add_state_variables(self, state_variables): pass
[docs] @overrides(AbstractThresholdType.get_units) def get_units(self, variable): return UNITS[variable]
[docs] @overrides(AbstractThresholdType.has_variable) def has_variable(self, variable): return variable in UNITS
[docs] @overrides(AbstractThresholdType.get_values) def get_values(self, parameters, state_variables, vertex_slice, ts): # Add the rest of the data return [parameters[V_THRESH]]
[docs] @overrides(AbstractThresholdType.update_values) def update_values(self, values, parameters, state_variables): pass
@property def v_thresh(self): """ :math:`V_{thresh}` """ return self.__v_thresh