STDP core implementation. More...

#include <static-assert.h>
#include <neuron/synapses.h>
#include "maths.h"
#include "post_events.h"
#include "weight_dependence/weight.h"
#include "timing_dependence/timing.h"
#include <debug.h>
#include <utils.h>
#include <neuron/plasticity/synapse_dynamics.h>
#include <stddef.h>

Data Structures
struct	pre_event_history_t
	The type of history data of pre-events. More...

struct	stdp_params
	The type of configuration parameters in SDRAM (written by host) More...

struct	fixed_stdp_synapse

Macros
#define	SYNAPSE_AXONAL_DELAY_BITS 3

#define	SYNAPSE_AXONAL_DELAY_MASK ((1 << SYNAPSE_AXONAL_DELAY_BITS) - 1)

Functions
static bool	synapse_dynamics_stdp_init (address_t address, stdp_params params, uint32_t n_synapse_types, uint32_t *ring_buffer_to_input_buffer_left_shifts)

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.

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 control_t	control_conversion (uint32_t id, uint32_t delay, uint32_t type)
	packing all of the information into the required plastic control word

uint32_t	synapse_dynamics_n_connections_in_row (synapse_row_fixed_part_t *fixed)
	Get the number of connections in the given row.

Variables
static stdp_params	params
	Configuration parameters.

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.

Detailed Description

STDP core implementation.

Definition in file synapse_dynamics_stdp_common.h.

Data Structure Documentation

◆ pre_event_history_t

struct pre_event_history_t

The type of history data of pre-events.

This data is stored in SDRAM in the plastic part of the synaptic matrix

Definition at line 72 of file synapse_dynamics_stdp_common.h.

Data Fields
uint32_t	prev_time	The event time.
pre_trace_t	prev_trace	The event trace.

◆ stdp_params

struct stdp_params

The type of configuration parameters in SDRAM (written by host)

Definition at line 80 of file synapse_dynamics_stdp_common.h.

Data Fields
uint32_t	backprop_delay	The back-propagation delay, in basic simulation timesteps.

◆ 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

Macro Definition Documentation

◆ SYNAPSE_AXONAL_DELAY_BITS

#define SYNAPSE_AXONAL_DELAY_BITS 3

Definition at line 60 of file synapse_dynamics_stdp_common.h.

◆ SYNAPSE_AXONAL_DELAY_MASK

#define SYNAPSE_AXONAL_DELAY_MASK ((1 << SYNAPSE_AXONAL_DELAY_BITS) - 1)

Definition at line 63 of file synapse_dynamics_stdp_common.h.

Function Documentation

◆ synapse_dynamics_stdp_init()

static bool synapse_dynamics_stdp_init	(	address_t *	address,
		stdp_params *	params,
		uint32_t	n_synapse_types,
		uint32_t *	ring_buffer_to_input_buffer_left_shifts
	)