void filter_update(uint ticks, uint arg1) {
use(arg1);
if (simulation_ticks != UINT32_MAX && ticks >= simulation_ticks) {
spin1_exit(0);
}
// Update the filters
input_filter_step(&g_input, true);
// Apply the transform to the input to get the output
for (uint j = 0; j < g_filter.size_out; j++) {
g_filter.output[j] = 0.0k;
for (uint k = 0; k < g_filter.size_in; k++) {
g_filter.output[j] += g_filter.transform[j*g_filter.size_in + k] *
g_filter.input[k];
}
}
// Increment the counter and transmit if necessary
delay_remaining--;
if(delay_remaining == 0) {
delay_remaining = g_filter.transmission_delay;
uint val = 0x0000;
for(uint d = 0; d < g_filter.size_out; d++) {
val = bitsk(g_filter.output[d]);
spin1_send_mc_packet(g_filter.keys[d], val, WITH_PAYLOAD);
spin1_delay_us(g_filter.interpacket_pause);
}
}
}
void sdp_tx_update(uint ticks, uint arg1) {
use(arg1);
if (simulation_ticks != UINT32_MAX && ticks >= simulation_ticks) {
spin1_exit(0);
}
// Update the filters
input_filter_step(&g_input, true);
// Increment the counter and transmit if necessary
delay_remaining--;
if(delay_remaining == 0) {
delay_remaining = g_sdp_tx.transmission_delay;
// Construct and transmit the SDP Message
sdp_msg_t message;
message.dest_addr = 0x0000; // (0, 0)
message.dest_port = 0xff;
message.srce_addr = sv->p2p_addr; // Sender P2P address
message.srce_port = spin1_get_id();
message.flags = 0x07; // No reply expected
message.tag = 1; // Send to IPtag 1
message.cmd_rc = 1;
spin1_memcpy(
message.data, g_sdp_tx.input, g_sdp_tx.n_dimensions * sizeof(value_t));
message.length = sizeof(sdp_hdr_t) + sizeof(cmd_hdr_t) +
g_sdp_tx.n_dimensions * sizeof(value_t);
spin1_send_sdp_msg(&message, 100);
}
}
void tick(uint ticks, uint arg1) {
use(arg1);
if (simulation_ticks != UINT32_MAX && ticks > simulation_ticks) {
// Transmit all packets assigned to be sent after the end of the simulation
transmit_packet_region(end_packets);
spin1_exit(0);
}
}
void hSDP(uint mailbox, uint port)
{
sdp_msg_t *msg = (sdp_msg_t *) mailbox;
#if(DEBUG_LEVEL>2)
io_printf(IO_STD, "[INFO] sdp on port-%d\n", port);
#endif
// use DEF_HOST_SDP_PORT for communication with the host via eth
if(port==DEF_HOST_SDP_PORT) {
switch(msg->cmd_rc) {
case HOST_REQ_PLL_INFO:
//spin1_schedule_callback(showPLLinfo, 1, 0, SCHEDULED_PRIORITY_VAL);
//io_printf(IO_STD, "[INFO] HOST_REQ_PLL_INFO..\n");
showPLLinfo(0, 0);
break;
case HOST_REQ_PROFILER_STREAM:
// then use seq to determine: 0 stop, 1 start
if(msg->seq==0) {
io_printf(IO_STD, "[INFO] Streaming off...\n");
streaming = FALSE;
}
else {
io_printf(IO_STD, "[INFO] Streaming on...\n");
streaming = TRUE;
}
break;
case HOST_SET_FREQ_VALUE:
{
// seq structure: byte-1 component, byte-0 frequency
PLL_PART comp = (PLL_PART)(msg->seq >> 8);
uint f = msg->seq & 0xFF;
#if(DEBUG_LEVEL>2)
io_printf(IO_STD, "[INFO] Request for comp-%d with f=%d\n", comp, f);
#endif
changeFreq(comp, f);
break;
}
case HOST_TELL_STOP:
spin1_exit(0);
}
}
// use DEF_INTERNAL_SDP_PORT for internal (inter-chip) communication
// such as with monitor core for SCP
else if(port==DEF_INTERNAL_SDP_PORT){
//! \brief Timer interrupt callback
//! \param[in] timer_count the number of times this call back has been
//! executed since start of simulation
//! \param[in] unused unused parameter kept for API consistency
//! \return None
void timer_callback(uint timer_count, uint unused) {
use(timer_count);
use(unused);
time++;
log_debug("Timer tick %u \n", time);
/* if a fixed number of simulation ticks that were specified at startup
then do reporting for finishing */
if (infinite_run != TRUE && time >= simulation_ticks) {
log_info("Simulation complete.\n");
// print statistics into logging region
synapses_print_pre_synaptic_events();
synapses_print_saturation_count();
spike_processing_print_buffer_overflows();
// Finalise any recordings that are in progress, writing back the final
// amounts of samples recorded to SDRAM
if (recording_flags > 0) {
recording_finalise();
}
spin1_exit(0);
return;
}
// otherwise do synapse and neuron time step updates
synapses_do_timestep_update(time);
neuron_do_timestep_update(time);
// trigger buffering_out_mechanism
if (recording_flags > 0) {
recording_do_timestep_update(time);
}
}
// ------------------------------------------------------------------------
// process received packets (stop, FORWARD and BACKPROP types)
// ------------------------------------------------------------------------
void s_receivePacket (uint key, uint payload)
{
// check if stop packet
if ((key & SPINN_TYPE_MASK) == SPINN_STOP_KEY)
{
// stop packet received
#ifdef DEBUG
stp_recv++;
#endif
// STOP decision arrived
tick_stop = key & SPINN_STPD_MASK;
#ifdef DEBUG_VRB
io_printf (IO_BUF, "sc:%x\n", tick_stop);
#endif
// check if all threads done
if (sf_thrds_done == 0)
{
// if done initialise semaphore
sf_thrds_done = 1;
// and advance tick
spin1_schedule_callback (sf_advance_tick, NULL, NULL, SPINN_S_TICK_P);
}
else
{
// if not done report processing thread done
sf_thrds_done -= 1;
}
}
// check if network stop packet
else if ((key & SPINN_TYPE_MASK) == SPINN_STPN_KEY)
{
// network stop packet received
#ifdef DEBUG
stn_recv++;
#endif
//done
spin1_exit (SPINN_NO_ERROR);
return;
}
else
{
#ifdef DEBUG
pkt_recv++;
#endif
// check if space in packet queue,
uint new_tail = (s_pkt_queue.tail + 1) % SPINN_SUM_PQ_LEN;
if (new_tail == s_pkt_queue.head)
{
// if queue full exit and report failure
spin1_exit (SPINN_QUEUE_FULL);
}
else
{
// if not full queue packet,
s_pkt_queue.queue[s_pkt_queue.tail].key = key;
s_pkt_queue.queue[s_pkt_queue.tail].payload = payload;
s_pkt_queue.tail = new_tail;
// and schedule processing thread -- if not active already
if (!s_active)
{
s_active = TRUE;
spin1_schedule_callback (s_process, NULL, NULL, SPINN_S_PROCESS_P);
}
}
}
}
void terminate(uint arg0, uint arg1)
{
io_printf(IO_STD, "Received -%d packets!\n", pktCntr);
spin1_exit(0);
}
void timer_callback(uint unused0, uint unused1) {
use(unused0);
use(unused1);
time++;
log_debug("Timer tick %u", time);
// If a fixed number of simulation ticks are specified and these have passed
if (simulation_ticks != UINT32_MAX && time >= simulation_ticks) {
log_info("Simulation complete.\n");
spin1_exit(0);
}
// Loop through delay stages
for (uint32_t d = 0; d < num_delay_stages; d++) {
// If any neurons emit spikes after this delay stage
bit_field_t delay_stage_config = neuron_delay_stage_config[d];
if (nonempty_bit_field(delay_stage_config, neuron_bit_field_words)) {
// Get key mask for this delay stage and it's time slot
uint32_t delay_stage_delay = (d + 1) * DELAY_STAGE_LENGTH;
uint32_t delay_stage_time_slot =
((time - delay_stage_delay) & num_delay_slots_mask);
uint8_t *delay_stage_spike_counters =
spike_counters[delay_stage_time_slot];
log_debug("Checking time slot %u for delay stage %u",
delay_stage_time_slot, d);
// Loop through neurons
for (uint32_t n = 0; n < num_neurons; n++) {
// If this neuron emits a spike after this stage
if (bit_field_test(delay_stage_config, n)) {
// Calculate key all spikes coming from this neuron will be
// sent with
uint32_t spike_key = ((d * num_neurons) + n) | key;
#if LOG_LEVEL >= LOG_DEBUG
if (delay_stage_spike_counters[n] > 0) {
log_debug("Neuron %u sending %u spikes after delay"
"stage %u with key %x",
n, delay_stage_spike_counters[n], d,
spike_key);
}
#endif // DEBUG
// Loop through counted spikes and send
for (uint32_t s = 0; s < delay_stage_spike_counters[n];
s++) {
while (!spin1_send_mc_packet(spike_key, 0,
NO_PAYLOAD)) {
spin1_delay_us(1);
}
}
}
}
}
}
// Zero all counters in current time slot
uint32_t current_time_slot = time & num_delay_slots_mask;
uint8_t *current_time_slot_spike_counters =
spike_counters[current_time_slot];
memset(current_time_slot_spike_counters, 0, sizeof(uint8_t) * num_neurons);
}