void transport_control_step(void)
{
uint64_t next_time;
uint64_t time_now = timer_get_timestamp() + global_time;
trickle_time_update(time_now);
uint32_t error_code = mesh_srv_get_next_processing_time(&next_time);
if (error_code != NRF_SUCCESS)
{
return;
}
if (next_time < time_now)
{
async_event_t async_evt;
async_evt.callback.generic = trickle_step_callback;
async_evt.type = EVENT_TYPE_GENERIC;
event_handler_push(&async_evt);
}
else
{
if (next_time < global_time + timeslot_get_end_time())
{
timer_abort(step_timer_index);
step_timer_index = timer_order_cb(next_time - global_time, trickle_step_callback);
}
}
}
/**
* @brief Async event dispatcher, works in APP LOW
*/
void QDEC_IRQHandler(void)
{
while (true)
{
bool got_evt = false;
got_evt |= event_fifo_pop(&g_async_evt_fifo);
if (timeslot_get_end_time() > 0) /* in timeslot */
{
got_evt |= event_fifo_pop(&g_async_evt_fifo_ts);
}
if (!got_evt)
{
break;
}
}
}
/**
* @brief Handle trickle timing events
*/
static void trickle_step_callback(void)
{
TICK_PIN(6);
/* check if timeslot is about to end */
if (timeslot_get_remaining_time() < RADIO_SAFETY_TIMING_US)
return;
uint64_t time_now = global_time + timer_get_timestamp();
trickle_time_update(time_now);
packet_t packet;
bool has_anything_to_send = false;
mesh_srv_packet_assemble(&packet, PACKET_DATA_MAX_LEN * PACKET_MAX_CHAIN_LEN,
&has_anything_to_send);
if (has_anything_to_send)
{
TICK_PIN(PIN_MESH_TX);
radio_disable();
uint8_t packet_and_addr_type = PACKET_TYPE_ADV_NONCONN |
((packet.sender.addr_type == BLE_GAP_ADDR_TYPE_PUBLIC)?
0 :
PACKET_ADDR_TYPE_MASK);
uint8_t* temp_data_ptr = &packet.data[0];
uint8_t* tx_data_ptr = &tx_data[0];
tx_data_ptr[PACKET_TYPE_POS] = packet_and_addr_type;
/* Code structured for packet chaining, although this is yet
to be implemented. */
do
{
uint8_t min_len = ((packet.length > PACKET_DATA_MAX_LEN)?
PACKET_DATA_MAX_LEN :
packet.length);
tx_data_ptr[PACKET_PADDING_POS] = 0;
tx_data_ptr[PACKET_LENGTH_POS] = (min_len + PACKET_ADDR_LEN);
tx_data_ptr[PACKET_TYPE_POS] = packet_and_addr_type;
memcpy(&tx_data_ptr[PACKET_ADDR_POS], packet.sender.addr, PACKET_ADDR_LEN);
memcpy(&tx_data_ptr[PACKET_DATA_POS], &temp_data_ptr[0], min_len);
radio_event_t tx_event;
tx_event.access_address = 0;
rbc_mesh_channel_get(&tx_event.channel);
tx_event.event_type = RADIO_EVENT_TYPE_TX;
tx_event.packet_ptr = &tx_data_ptr[0];
tx_event.start_time = 0;
tx_event.callback.tx = NULL;
radio_order(&tx_event);
TICK_PIN(0);
} while (0);
order_search(); /* search for the rest of the timeslot */
}
/* order next processing */
uint64_t next_time;
uint64_t end_time = timeslot_get_end_time();
uint32_t error_code = mesh_srv_get_next_processing_time(&next_time);
if (error_code == NRF_SUCCESS && next_time < global_time + end_time)
{
timer_abort(step_timer_index);
step_timer_index = timer_order_cb(next_time - global_time, trickle_step_callback);
}
}