Inlined neuron implementation following standard component model. More...

#include "neuron_impl.h"
#include <neuron/models/neuron_model_lif_impl.h>
#include <neuron/synapse_types/synapse_types_exponential_impl.h>
#include <neuron/input_types/input_type_current.h>
#include <neuron/current_sources/current_source_impl.h>
#include <neuron/current_sources/current_source.h>
#include <debug.h>
#include <neuron/neuron_recording.h>

Data Structures
struct	packet_firing_data_t
	The definition of the threshold. More...

Enumerations
enum	send_type { SEND_TYPE_INT = 0 , SEND_TYPE_UINT , SEND_TYPE_ACCUM , SEND_TYPE_UACCUM , SEND_TYPE_FRACT , SEND_TYPE_UFRACT }
	What sort of message payload should we send? More...

enum	word_recording_indices { V_RECORDING_INDEX = 0 , GSYN_EXC_RECORDING_INDEX = 1 , GSYN_INH_RECORDING_INDEX = 2 , N_RECORDED_VARS = 3 }
	Indices for recording of words. More...

enum	bitfield_recording_indices { PACKET_RECORDING_BITFIELD = 0 , N_BITFIELD_VARS = 1 }
	Indices for recording of bitfields. More...

Functions
static bool	neuron_impl_initialise (uint32_t n_neurons)
	Initialise the particular implementation of the data.

static void	neuron_impl_add_inputs (index_t synapse_type_index, index_t neuron_index, input_t weights_this_timestep)
	Add inputs to the neuron.

static uint32_t	n_words_needed (size_t size)
	The number of words required to hold an object of given size.

static void	neuron_impl_load_neuron_parameters (address_t address, uint32_t next, uint32_t n_neurons, address_t save_initial_state)

static void	neuron_impl_do_timestep_update (uint32_t timer_count, uint32_t time, uint32_t n_neurons)
	Do the timestep update for the particular implementation.

static void	neuron_impl_store_neuron_parameters (address_t address, uint32_t next, uint32_t n_neurons)
	Stores neuron parameters back into SDRAM.

void	neuron_impl_print_inputs (uint32_t n_neurons)
	Print the inputs to the neurons.

void	neuron_impl_print_synapse_parameters (uint32_t n_neurons)
	Print the synapse parameters of the neurons.

const char *	neuron_impl_get_synapse_type_char (uint32_t synapse_type)
	Get the synapse type character for a synapse type.

Variables
static neuron_t *	neuron_array
	Array of neuron states.

static packet_firing_data_t *	packet_firing_array
	Threshold states array.

static synapse_types_t *	synapse_types_array
	The synapse shaping parameters.

static uint	n_steps_per_timestep
	The number of steps to run per timestep.

Detailed Description

Inlined neuron implementation following standard component model.

Definition in file neuron_impl_external_devices.h.

Data Structure Documentation

◆ packet_firing_data_t

struct packet_firing_data_t

The definition of the threshold.

Definition at line 48 of file neuron_impl_external_devices.h.

Data Fields
uint32_t	key	The key to send to update the value.
uint32_t	value_as_payload	A scaling factor (>0) if the value is to be sent as payload, False (0) if just the key
accum	min_value	The minimum allowed value to send as the payload. Values below are clipped to this value
accum	max_value	The maximum allowed value to send as the payload. Values above are clipped to this value
uint32_t	timesteps_between_sending	The time between sending the value.
uint32_t	time_until_next_send	The time until the next sending of the value (initially 0)
enum send_type	type	Send type.

Enumeration Type Documentation

◆ send_type

enum send_type

What sort of message payload should we send?

Enumerator
SEND_TYPE_INT	Message payload is an `int32_t`
SEND_TYPE_UINT	Message payload is an `uint32_t`
SEND_TYPE_ACCUM	Message payload is an `accum`
SEND_TYPE_UACCUM	Message payload is an `unsigned accum`
SEND_TYPE_FRACT	Message payload is a `fract`
SEND_TYPE_UFRACT	Message payload is an `unsigned fract`

Definition at line 25 of file neuron_impl_external_devices.h.

◆ word_recording_indices

enum word_recording_indices

Indices for recording of words.

Enumerator
V_RECORDING_INDEX	V (somatic potential) recording index.
GSYN_EXC_RECORDING_INDEX	Gsyn_exc (excitatory synaptic conductance/current) recording index.
GSYN_INH_RECORDING_INDEX	Gsyn_inh (excitatory synaptic conductance/current) recording index.
N_RECORDED_VARS	Number of recorded word-sized state variables.

Definition at line 69 of file neuron_impl_external_devices.h.

◆ bitfield_recording_indices

enum bitfield_recording_indices

Indices for recording of bitfields.

Enumerator
PACKET_RECORDING_BITFIELD	Spike event recording index.
N_BITFIELD_VARS	Number of recorded bitfields.

Definition at line 81 of file neuron_impl_external_devices.h.

Function Documentation

◆ neuron_impl_initialise()

static bool neuron_impl_initialise ( uint32_t n_neurons )

static

Initialise the particular implementation of the data.

Parameters

[in] n_neurons The number of neurons

Returns: True if successful

Definition at line 144 of file neuron_impl_external_devices.h.

◆ neuron_impl_add_inputs()

static void neuron_impl_add_inputs	(	index_t	synapse_type_index,
		index_t	neuron_index,
		input_t	weights_this_timestep
	)

static

Add inputs to the neuron.

Parameters

[in]	synapse_type_index	the synapse type (e.g. exc. or inh.)
[in]	neuron_index	the index of the neuron
[in]	weights_this_timestep	weight inputs to be added

Definition at line 179 of file neuron_impl_external_devices.h.

◆ n_words_needed()

static uint32_t n_words_needed ( size_t size )

static

The number of words required to hold an object of given size.

Parameters

[in] size The size of object

Returns: Number of words needed to hold the object (not bytes!)

Definition at line 191 of file neuron_impl_external_devices.h.

◆ neuron_impl_load_neuron_parameters()

static void neuron_impl_load_neuron_parameters	(	address_t	address,
		uint32_t	next,
		uint32_t	n_neurons,
		address_t	save_initial_state
	)

static

Definition at line 196 of file neuron_impl_external_devices.h.

◆ neuron_impl_do_timestep_update()

static void neuron_impl_do_timestep_update	(	uint32_t	timer_count,
		uint32_t	time,
		uint32_t	n_neurons
	)

static

Do the timestep update for the particular implementation.

Parameters

[in]	timer_count	The timer count, used for TDMA packet spreading
[in]	time	The time step of the update
[in]	n_neurons	The number of neurons

Definition at line 257 of file neuron_impl_external_devices.h.

◆ neuron_impl_store_neuron_parameters()

static void neuron_impl_store_neuron_parameters	(	address_t	address,
		uint32_t	next,
		uint32_t	n_neurons
	)

static

Stores neuron parameters back into SDRAM.

Parameters

[out]	address	the address in SDRAM to start the store
[in]	next	Offset of next address in store
[in]	n_neurons	number of neurons

Definition at line 361 of file neuron_impl_external_devices.h.

◆ neuron_impl_print_inputs()

void neuron_impl_print_inputs ( uint32_t n_neurons )

Print the inputs to the neurons.

Parameters

[in] n_neurons The number of neurons

Definition at line 387 of file neuron_impl_external_devices.h.

◆ neuron_impl_print_synapse_parameters()

void neuron_impl_print_synapse_parameters ( uint32_t n_neurons )

Print the synapse parameters of the neurons.

Parameters

[in] n_neurons The number of neurons

Definition at line 417 of file neuron_impl_external_devices.h.

◆ neuron_impl_get_synapse_type_char()

const char * neuron_impl_get_synapse_type_char ( uint32_t synapse_type )

Get the synapse type character for a synapse type.

Parameters

[in] synapse_type The synapse type

Returns: The descriptor character (sometimes two characters)

Definition at line 427 of file neuron_impl_external_devices.h.

Variable Documentation

◆ neuron_array

neuron_t* neuron_array

static

Array of neuron states.

Definition at line 92 of file neuron_impl_external_devices.h.

◆ packet_firing_array

packet_firing_data_t* packet_firing_array

static

Threshold states array.

Definition at line 95 of file neuron_impl_external_devices.h.

◆ synapse_types_array

synapse_types_t* synapse_types_array

static

The synapse shaping parameters.

Definition at line 98 of file neuron_impl_external_devices.h.

◆ n_steps_per_timestep

uint n_steps_per_timestep

static

The number of steps to run per timestep.

Definition at line 101 of file neuron_impl_external_devices.h.

Data Structures

Enumerations

Functions

Variables

Detailed Description

Data Structure Documentation

◆ packet_firing_data_t

Enumeration Type Documentation

◆ send_type

◆ word_recording_indices

◆ bitfield_recording_indices

Function Documentation

◆ neuron_impl_initialise()

◆ neuron_impl_add_inputs()

◆ n_words_needed()

◆ neuron_impl_load_neuron_parameters()

◆ neuron_impl_do_timestep_update()

◆ neuron_impl_store_neuron_parameters()

◆ neuron_impl_print_inputs()

◆ neuron_impl_print_synapse_parameters()

◆ neuron_impl_get_synapse_type_char()

Variable Documentation

◆ neuron_array

◆ packet_firing_array

◆ synapse_types_array

◆ n_steps_per_timestep