Allow weight change. More...

#include "post_events_with_weight_change.h"
#include <neuron/synapses.h>
#include <neuron/plasticity/synapse_dynamics.h>
#include <stddef.h>

Data Structures
struct	limits

struct	change_params

struct	updatable_synapse_t

struct	synapse_row_plastic_data_t
	The format of the plastic data region of a synaptic row. More...

struct	fixed_stdp_synapse

Functions
bool	synapse_dynamics_initialise (address_t address, uint32_t n_neurons, uint32_t n_synapse_types, uint32_t *ring_buffer_to_input_buffer_left_shifts)
	Initialise the synapse dynamics.

void	synapse_dynamics_process_post_synaptic_event (uint32_t time, index_t neuron_index)
	Inform the synapses that the neuron fired.

static fixed_stdp_synapse	synapse_dynamics_stdp_get_fixed (uint32_t control_word, uint32_t time, uint32_t colour_delay)

static void	synapse_dynamics_stdp_update_ring_buffers (weight_t *ring_buffers, fixed_stdp_synapse s, int32_t weight)

static updatable_synapse_t	process_plastic_synapse (uint32_t pre_spike, uint32_t control_word, weight_t ring_buffers, uint32_t time, uint32_t colour_delay, updatable_synapse_t synapse, uint32_t changed)

static int16_t	change_sign (weight_t weight)

static void	process_weight_update (synapse_row_plastic_data_t plastic_region_address, synapse_row_fixed_part_t fixed_region)

bool	synapse_dynamics_process_plastic_synapses (synapse_row_plastic_data_t plastic_region_address, synapse_row_fixed_part_t fixed_region, weight_t ring_buffers, uint32_t time, uint32_t colour_delay, bool write_back)
	Process the dynamics of the synapses.

input_t	synapse_dynamics_get_intrinsic_bias (uint32_t time, index_t neuron_index)

uint32_t	synapse_dynamics_get_plastic_pre_synaptic_events (void)
	Get the counters for plastic pre synaptic events based on (if the model was compiled with SYNAPSE_BENCHMARK parameter) or returns 0.

uint32_t	synapse_dynamics_get_plastic_saturation_count (void)
	Get the number of ring buffer saturation events due to adding plastic weights.

Variables
static post_event_history_t *	post_event_history
	The history data of post-events.

static uint32_t	num_plastic_pre_synaptic_events = 0
	Count of pre-synaptic events relevant to plastic processing.

static uint32_t	plastic_saturation_count = 0
	Count of times that the plastic math became saturated.

static change_params *	params
	Parameters.

Detailed Description

Allow weight change.

Definition in file synapse_dynamics_external_weight_change.c.

Data Structure Documentation

◆ limits

struct limits

Definition at line 24 of file synapse_dynamics_external_weight_change.c.

Data Fields
weight_t	min
weight_t	max

◆ change_params

struct change_params

Definition at line 29 of file synapse_dynamics_external_weight_change.c.

Data Fields
uint32_t	n_limits
limits	weight_limits[]

◆ updatable_synapse_t

struct updatable_synapse_t

Definition at line 34 of file synapse_dynamics_external_weight_change.c.

Data Fields
weight_t	weight

◆ synapse_row_plastic_data_t

struct synapse_row_plastic_data_t

The format of the plastic data region of a synaptic row.

Definition at line 45 of file synapse_dynamics_stdp_izhikevich_neuromodulation.c.

Data Fields
union synapse_row_plastic_data_t.__unnamed10__	__unnamed__
pre_event_history_t	history	The pre-event history.
plastic_synapse_t	synapses[]	The per-synapse information.
uint32_t	pre_spike: 31
uint32_t	is_update: 1
updatable_synapse_t	synapses[]

◆ fixed_stdp_synapse

struct fixed_stdp_synapse

Definition at line 85 of file synapse_dynamics_stdp_common.h.

Data Fields
uint32_t	delay_dendritic
uint32_t	delay_axonal
uint32_t	type
uint32_t	index
uint32_t	type_index
uint32_t	ring_buffer_index
uint32_t	delay

Function Documentation

◆ synapse_dynamics_initialise()

bool synapse_dynamics_initialise	(	address_t	address,
		uint32_t	n_neurons,
		uint32_t	n_synapse_types,
		uint32_t *	ring_buffer_to_input_buffer_left_shifts
	)

Initialise the synapse dynamics.

Parameters

[in]	address	Where the configuration data is
[in]	n_neurons	Number of neurons
[in]	n_synapse_types	Number of synapse types
[in]	ring_buffer_to_input_buffer_left_shifts	How to interpret the values from the ring buffers

Returns: Whether the initialisation succeeded.

Definition at line 65 of file synapse_dynamics_external_weight_change.c.

◆ synapse_dynamics_process_post_synaptic_event()

void synapse_dynamics_process_post_synaptic_event	(	uint32_t	time,
		index_t	neuron_index
	)

Inform the synapses that the neuron fired.

Parameters

[in]	time	The current simulation time
[in]	neuron_index	Which neuron are we processing

Definition at line 93 of file synapse_dynamics_external_weight_change.c.

◆ synapse_dynamics_stdp_get_fixed()

static fixed_stdp_synapse synapse_dynamics_stdp_get_fixed	(	uint32_t	control_word,
		uint32_t	time,
		uint32_t	colour_delay
	)

inlinestatic

Definition at line 98 of file synapse_dynamics_external_weight_change.c.

◆ synapse_dynamics_stdp_update_ring_buffers()

static void synapse_dynamics_stdp_update_ring_buffers	(	weight_t *	ring_buffers,
		fixed_stdp_synapse	s,
		int32_t	weight
	)

inlinestatic

Definition at line 120 of file synapse_dynamics_external_weight_change.c.

◆ process_plastic_synapse()

static updatable_synapse_t process_plastic_synapse	(	uint32_t	pre_spike,
		uint32_t	control_word,
		weight_t *	ring_buffers,
		uint32_t	time,
		uint32_t	colour_delay,
		updatable_synapse_t	synapse,
		uint32_t *	changed
	)

inlinestatic

Definition at line 134 of file synapse_dynamics_external_weight_change.c.

◆ change_sign()

static int16_t change_sign ( weight_t weight )

inlinestatic

Definition at line 185 of file synapse_dynamics_external_weight_change.c.

◆ process_weight_update()

static void process_weight_update	(	synapse_row_plastic_data_t *	plastic_region_address,
		synapse_row_fixed_part_t *	fixed_region
	)

inlinestatic

Definition at line 194 of file synapse_dynamics_external_weight_change.c.

◆ synapse_dynamics_process_plastic_synapses()

bool synapse_dynamics_process_plastic_synapses	(	synapse_row_plastic_data_t *	plastic_region_data,
		synapse_row_fixed_part_t *	fixed_region,
		weight_t *	ring_buffers,
		uint32_t	time,
		uint32_t	colour_delay,
		bool *	write_back
	)

Process the dynamics of the synapses.

Parameters

[in,out]	plastic_region_data	Where the plastic data is
[in]	fixed_region	Where the fixed data is
[in,out]	ring_buffers	The ring buffers
[in]	time	The current simulation time
[out]	Whether	to write back anything