matrix_generator_weight_changer.h File Reference

Weight-changer synaptic matrix implementation. More...

#include <stdbool.h>
#include <debug.h>
#include <delay_extension/delay_extension.h>
#include "matrix_generator_common.h"
#include <synapse_expander/generator_types.h>
#include <utils.h>

Go to the source code of this file.

Data Structures
struct	matrix_generator_weight_changer
struct	row_changer_plastic_t
	The layout of the initial plastic synapse part of the row. More...
struct	row_changer_fixed_t
	The layout of the fixed synapse region of the row; the fixed-fixed region is empty. More...
union	matrix_generator_weight_changer.__unnamed29__

Functions
static row_changer_plastic_t *	get_changer_row (uint32_t *synaptic_matrix, uint32_t max_row_n_words, uint32_t pre_index)
	Get a synaptic row for a given neuron.
static row_changer_fixed_t *	get_changer_fixed_row (row_changer_plastic_t *plastic_row)
	Get the fixed part of a row that comes after the plastic part.
static void	setup_changer_rows (uint32_t *matrix, uint32_t n_rows, uint32_t max_row_n_words, uint32_t row_offset)
	Set up the rows so that they are ready for writing to.
void *	matrix_generator_changer_initialize (void **region, void *synaptic_matrix)
	Initialise the Changer synaptic matrix generator.
void	matrix_generator_changer_free (void *generator)
	Free any data for the matrix generator.
static uint32_t	build_changer_word (uint32_t type, uint32_t post_index, uint32_t synapse_type_bits, uint32_t synapse_index_bits, int16_t weight)
static bool	matrix_generator_changer_write_synapse (void *generator, uint32_t pre_index, uint16_t post_index, accum weight, uint16_t delay, unsigned long accum weight_scale)

Detailed Description

Weight-changer synaptic matrix implementation.

Definition in file matrix_generator_weight_changer.h.

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Data Structure Documentation

matrix_generator_weight_changer

struct matrix_generator_weight_changer

Definition at line 29 of file matrix_generator_weight_changer.h.

Data Fields
union matrix_generator_weight_changer.__unnamed29__	__unnamed__
uint32_t	max_row_n_words
uint32_t	max_row_n_synapses
uint32_t	n_pre_neurons
uint32_t	synapse_type
uint32_t	synapse_type_bits
uint32_t	synapse_index_bits
uint32_t	row_offset

row_changer_plastic_t

struct row_changer_plastic_t

The layout of the initial plastic synapse part of the row.

Definition at line 46 of file matrix_generator_weight_changer.h.

Data Fields
uint32_t	plastic_plastic_size	the plastic-plastic size within the row
uint32_t	pre_spike: 31
uint32_t	is_update: 1

row_changer_fixed_t

struct row_changer_fixed_t

The layout of the fixed synapse region of the row; the fixed-fixed region is empty.

Definition at line 53 of file matrix_generator_weight_changer.h.

Data Fields
uint32_t	fixed_fixed_size	the fixed-fixed size within the fixed region
uint32_t	fixed_plastic_size	the fixed-plastic size within the fixed region
int32_t	fixed_plastic_data[]	the fixed-plastic data within the fixed region

matrix_generator_weight_changer.__unnamed29__

union matrix_generator_weight_changer.__unnamed29__

Definition at line 30 of file matrix_generator_weight_changer.h.

Data Fields
uint32_t *	synaptic_matrix	The address of the synaptic matrix (once initialised)
uint32_t	synaptic_matrix_offset	The offset of the synaptic matrix (as read from SDRAM)

Function Documentation

get_changer_row()

static row_changer_plastic_t * get_changer_row ( uint32_t *  synaptic_matrix, uint32_t  max_row_n_words, uint32_t  pre_index  )

static

Get a synaptic row for a given neuron.

Parameters

[in]	synaptic_matrix	the address of the synaptic matrix
[in]	max_row_n_words	the maximum number of words (excluding headers) in each row of the table
[in]	pre_index	the index of the pre-neuron relative to the start of the matrix

Returns

A pointer to the row of the matrix to write to

Definition at line 68 of file matrix_generator_weight_changer.h.

get_changer_fixed_row()

static row_changer_fixed_t * get_changer_fixed_row ( row_changer_plastic_t *  plastic_row )

static

Get the fixed part of a row that comes after the plastic part.

Parameters

[in]

plastic_row

A pointer to the row to find the fixed part of

Returns

A pointer to the fixed part of the matrix to write to

Definition at line 79 of file matrix_generator_weight_changer.h.

setup_changer_rows()

static void setup_changer_rows ( uint32_t *  matrix, uint32_t  n_rows, uint32_t  max_row_n_words, uint32_t  row_offset  )

static

Set up the rows so that they are ready for writing to.

Parameters

[in]	matrix	The base address of the matrix to set up
[in]	n_rows	The number of rows in the matrix
[in]	max_row_n_words	The maximum number of words used by a row

Definition at line 89 of file matrix_generator_weight_changer.h.

matrix_generator_changer_initialize()

void * matrix_generator_changer_initialize	(	void **	region,
		void *	synaptic_matrix
	)

Initialise the Changer synaptic matrix generator.

Parameters

[in,out]	region	Region to read parameters from. Should be updated to position just after parameters after calling.
[in]	synaptic_matrix	The base address of the synaptic matrix

Returns

A data item to be passed in to other functions later on

Definition at line 110 of file matrix_generator_weight_changer.h.

matrix_generator_changer_free()

void matrix_generator_changer_free

(

void *

generator

)

Free any data for the matrix generator.

Parameters

[in]

generator

The generator to free

Definition at line 134 of file matrix_generator_weight_changer.h.

build_changer_word()

static uint32_t build_changer_word ( uint32_t  type, uint32_t  post_index, uint32_t  synapse_type_bits, uint32_t  synapse_index_bits, int16_t  weight  )

static

Definition at line 138 of file matrix_generator_weight_changer.h.

matrix_generator_changer_write_synapse()

static bool matrix_generator_changer_write_synapse ( void *  generator, uint32_t  pre_index, uint16_t  post_index, accum  weight, uint16_t  delay, unsigned long accum  weight_scale  )

static

Definition at line 152 of file matrix_generator_weight_changer.h.