The implementation of the Command Sender Multicast Source. More...

#include <common-typedefs.h>
#include <data_specification.h>
#include <debug.h>
#include <simulation.h>
#include <stdbool.h>

Data Structures
struct	command
	Command structure, describing a SpiNNaker multicast packet to be sent at some point. More...

struct	timed_command
	A command that happens at a particular simulation time. More...

struct	command_list
	A collection of commands to be sent in response to an event. More...

struct	timed_command_list
	A collection of commands to be sent at particular simulation times. More...

struct	cs_provenance_t
	custom provenance data More...

Enumerations
enum	callback_priorities { SDP = 0 , DMA = 1 , TIMER = 2 , SDP = 0 , DMA = 0 }
	values for the priority for each callback More...

enum	region_identifiers { SYSTEM_REGION = 0 , COMMANDS_WITH_ARBITRARY_TIMES , COMMANDS_AT_START_RESUME , COMMANDS_AT_STOP_PAUSE , PROVENANCE_REGION }
	region identifiers More...

enum	{ FIRST_TIME = 0 }
	time ID

Functions
static void	transmit_command (command *command_to_send)
	Immediately sends SpiNNaker multicast packets in response to a command. More...

static void	run_stop_pause_commands (void)
	Sends all the commands registered for sending on simulation stop or pause.

static void	run_start_resume_commands (void)
	Sends all the commands registered for sending on simulation start or resume.

static bool	read_scheduled_parameters (timed_command_list *sdram_timed_commands)
	Copy the list of commands to run at particular times into DTCM. More...

static bool	read_start_resume_commands (command_list *sdram_commands)
	Copy the list of commands to run on start or resume into DTCM. More...

static bool	read_pause_stop_commands (command_list *sdram_commands)
	Copy the list of commands to run on stop or pause into DTCM. More...

static void	timer_callback (uint unused0, uint unused1)
	The timer tick callback. Sends those commands that are due in the current simulation state and time. More...

static void	write_provenance (address_t address)
	Write our provenance data into the provenance region. More...

static bool	initialize (uint32_t *timer_period)
	Initialises the core. More...

void	c_main (void)
	Entry point.

Variables
static uint32_t	time
	The simulation timer.

static uint32_t	simulation_ticks
	The number of ticks to run for.

static uint32_t	infinite_run
	Whether the simulation is running "forever" (robotics mode).

static timed_command *	timed_commands
	The commands to send at particular times.

static command *	start_resume_commands
	The commands to run when a simulation starts or resumes after pause.

static command *	pause_stop_commands
	The commands to run when a simulation stops or pauses.

static uint32_t	n_timed_commands
	The number of timed commands.

static uint32_t	n_start_resume_commands
	The number of commands to send on start/resume.

static uint32_t	n_pause_stop_commands
	The number of commands to send on stop/pause.

static uint32_t	next_timed_command
	The index of the next timed command to run.

static bool	resume = true
	Whether we are in the state where the next run will be a start/resume.

static uint32_t	n_commands_sent
	The number of commands sent.

Detailed Description

The implementation of the Command Sender Multicast Source.

The purpose of this application is to inject SpiNNaker packets into the on-chip network at specified times. It is used (among other things) to implement the SpikeSourceArray model in sPyNNaker.

Definition in file command_sender_multicast_source.c.

Data Structure Documentation

◆ command

struct command

Command structure, describing a SpiNNaker multicast packet to be sent at some point.

Note that the delay actually comes after sending each mandated packet when repeats are requested rather than just between packets.

Definition at line 36 of file command_sender_multicast_source.c.

Data Fields
uint32_t	key	The key of the packet.
bool	has_payload	Whether to send a payload with the packet.
uint32_t	payload	The payload for the packet.
uint32_t	repeats	The number of times to repeat the packet. If zero, the packet is only sent once.
uint32_t	delay	The time (in microseconds) to delay between sending each repeat.

◆ timed_command

struct timed_command

A command that happens at a particular simulation time.

Definition at line 51 of file command_sender_multicast_source.c.

Data Fields
uint32_t	time	The simulation time to send a packet.
command	command	What to send.

◆ command_list

struct command_list

A collection of commands to be sent in response to an event.

This is used for SDRAM only.

Definition at line 59 of file command_sender_multicast_source.c.

Data Fields
uint32_t	size	The number of commands to send.
command	commands[]	The commands to send.

◆ timed_command_list

struct timed_command_list

A collection of commands to be sent at particular simulation times.

This is used for SDRAM only.

Definition at line 67 of file command_sender_multicast_source.c.

Data Fields
uint32_t	size	The number of commands to send.
timed_command	commands[]	The commands to send, sorted in time order.

◆ cs_provenance_t

struct cs_provenance_t

custom provenance data

Definition at line 123 of file command_sender_multicast_source.c.

Data Fields
uint32_t	n_commands_sent	The number of commands sent.

Enumeration Type Documentation

◆ callback_priorities

enum callback_priorities

values for the priority for each callback

Enumerator
SDP	Responding to network traffic is highest priority.
DMA	Handling memory transfers is next highest.
TIMER	Responding to timers is lowest priority, and most common.

Definition at line 99 of file command_sender_multicast_source.c.

◆ region_identifiers

enum region_identifiers

region identifiers

Enumerator
SYSTEM_REGION	Where simulation system information is stored.
COMMANDS_WITH_ARBITRARY_TIMES	Where to read timed commands from. The region is formatted as a timed_command_list.
COMMANDS_AT_START_RESUME	Where to read start/resume commands from. The region is formatted as a command_list.
COMMANDS_AT_STOP_PAUSE	Where to read stop/pause commands from. The region is formatted as a command_list.
PROVENANCE_REGION	Where to record provenance data. (Format: cs_provenance_t)

Definition at line 106 of file command_sender_multicast_source.c.

Function Documentation

◆ transmit_command()

static void transmit_command ( command * command_to_send )

static

Immediately sends SpiNNaker multicast packets in response to a command.

Parameters

[in] command_to_send The command to send.

Definition at line 136 of file command_sender_multicast_source.c.

◆ read_scheduled_parameters()

static bool read_scheduled_parameters ( timed_command_list * sdram_timed_commands )

static

Copy the list of commands to run at particular times into DTCM.

Parameters

[in] sdram_timed_commands The memory region containing the description of what commands to send and when.

Returns: True if we succeeded, false if we failed (due to memory problems)

Definition at line 203 of file command_sender_multicast_source.c.

◆ read_start_resume_commands()

static bool read_start_resume_commands ( command_list * sdram_commands )

static

Copy the list of commands to run on start or resume into DTCM.

Parameters

[in] sdram_commands The memory region containing the description of what commands to send.

Returns: True if we succeeded, false if we failed (due to memory problems)

Definition at line 232 of file command_sender_multicast_source.c.

◆ read_pause_stop_commands()

static bool read_pause_stop_commands ( command_list * sdram_commands )

static

Copy the list of commands to run on stop or pause into DTCM.

Parameters

[in] sdram_commands The memory region containing the description of what commands to send.

Returns: True if we succeeded, false if we failed (due to memory problems)

Definition at line 257 of file command_sender_multicast_source.c.

◆ timer_callback()

static void timer_callback	(	uint	unused0,
		uint	unused1
	)

static

The timer tick callback. Sends those commands that are due in the current simulation state and time.

Parameters

unused0	unused
unused1	unused

Definition at line 284 of file command_sender_multicast_source.c.

◆ write_provenance()

static void write_provenance ( address_t address )

static

Write our provenance data into the provenance region.

Parameters

[in] address Where to write

Definition at line 318 of file command_sender_multicast_source.c.

◆ initialize()

static bool initialize ( uint32_t * timer_period )

static

Initialises the core.

Parameters

[out] timer_period The timer tick period.

Returns: True if initialisation succeeded.

Definition at line 326 of file command_sender_multicast_source.c.

Data Structures

Enumerations

Functions

Variables

Detailed Description

Data Structure Documentation

◆ command

◆ timed_command

◆ command_list

◆ timed_command_list

◆ cs_provenance_t

Enumeration Type Documentation

◆ callback_priorities

◆ region_identifiers

Function Documentation

◆ transmit_command()

◆ read_scheduled_parameters()

◆ read_start_resume_commands()

◆ read_pause_stop_commands()

◆ timer_callback()

◆ write_provenance()

◆ initialize()