Synapse formation using a distance-dependent rule. More...

#include "formation.h"

Data Structures
struct	formation_params_t
	Configuration of synapse formation rule. More...

Macros
#define	MAX_SHORT 65535
	Largest value in a `uint16_t`

Functions
static int	my_abs (int a)
	abs function

static bool	synaptogenesis_formation_rule (current_state_t current_state, const formation_params_t params, uint32_t time, synaptic_row_t row)
	Formation rule for synaptogenesis; picks what neuron in the current population will have a synapse added, and then performs the addition.

Detailed Description

Synapse formation using a distance-dependent rule.

Definition in file formation_distance_dependent_impl.h.

Data Structure Documentation

◆ formation_params

struct formation_params

Configuration of synapse formation rule.

Describes the size of grid containing the neurons (the total number of neurons probably ought to be equal to or just a bit under grid_x × grid_y), and two tables of distance-dependent connection probabilities. The FF table describes ??? connection probabilities, and the LAT table describes lateral connection probabilities. Both are keyed by the square of the inter-neuron distance.

Note that both pre- and post-neurons are assumed to be on the same size of grid, and the inter-layer distance is assumed to be constant (so it can be accounted for in the construction of the tables).

Definition at line 39 of file formation_distance_dependent_impl.h.

Data Fields
uint32_t	grid_x	Size of grid containing neurons, X-dimension.
uint32_t	grid_y	Size of grid containing neurons, Y-dimension.
unsigned long fract	grid_x_recip	Reciprocal of grid_x.
unsigned long fract	grid_y_recip	Reciprocal of grid_y.
uint32_t	ff_prob_size	Size of FF probability table.
uint32_t	lat_prob_size	Size of LAT probability table.
uint16_t	prob_tables[]	Concatenated probability tables; first the FF table, then the LAT table.

Macro Definition Documentation

◆ MAX_SHORT

#define MAX_SHORT 65535

Largest value in a uint16_t

Definition at line 25 of file formation_distance_dependent_impl.h.

Function Documentation

◆ my_abs()

static int my_abs ( int a )

static

abs function

Parameters

[in] a value (must not be INT_MIN)

Returns: Absolute value of a

Definition at line 59 of file formation_distance_dependent_impl.h.

◆ synaptogenesis_formation_rule()

static bool synaptogenesis_formation_rule	(	current_state_t *	current_state,
		const formation_params_t *	params,
		uint32_t	time,
		synaptic_row_t	row
	)

inlinestatic

Formation rule for synaptogenesis; picks what neuron in the current population will have a synapse added, and then performs the addition.

Parameters

[in]	current_state	Pointer to current state
[in]	params	Pointer to rewiring data
[in]	time	Time of formation
[in]	row	The row to form within

Returns: if row was modified

Definition at line 71 of file formation_distance_dependent_impl.h.

Data Structures

Macros

Functions