auracaster/hci_uart_iso_timesync
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Schedule Alternate Toggle pulse for SDU Sync Ref to Audio Out tests

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This commit is contained in:
Matthias Ringwald
2024-11-27 13:03:26 +01:00
parent 8ce9f72f4a
commit 9d475bda31
1 changed files with 8 additions and 10 deletions
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src/main.c
+8 -10
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@@ -503,7 +503,7 @@ static void sync_toggle_timer_isr_handler(nrf_timer_event_t event_type, void *p_
LOG_INF("SDU Sync Ref: %d", capture_time_us); LOG_INF("SDU Sync Ref: %d", capture_time_us);
break; break;
case ALTERNATE_TOGGLE_STATE_W4_AUDIO_OUT: case ALTERNATE_TOGGLE_STATE_W4_AUDIO_OUT:
alternate_toggle_state = ALTERNATE_TOGGLE_STATE_W4_AUDIO_OUT; alternate_toggle_state = ALTERNATE_TOGGLE_STATE_IDLE;
gpio_pin_set_dt(&alternate_toggle_pin, 0); gpio_pin_set_dt(&alternate_toggle_pin, 0);
LOG_INF("Audio Out: %d", capture_time_us); LOG_INF("Audio Out: %d", capture_time_us);
break; break;
@@ -522,7 +522,7 @@ static void setup_sdu_sync_to_audio_out_timer(uint32_t delay_us) {
current_time_us = nrf_timer_cc_get(NRF_TIMER2, NRF_TIMER_CC_CHANNEL1); current_time_us = nrf_timer_cc_get(NRF_TIMER2, NRF_TIMER_CC_CHANNEL1);
} }
uint32_t sdu_sync_ref_us = current_time_us + delay_us; uint32_t sdu_sync_ref_us = current_time_us + delay_us;
LOG_INF("TOGGLE TIMER now %u, sdu_sync_ref %u", current_time_us, sdu_sync_ref_us); LOG_INF("TOGGLE TIMER now %u, delta %u, sdu_sync_ref %u", current_time_us, delay_us, sdu_sync_ref_us);
nrfx_timer_compare(&sync_toggle_timer_instance, NRF_TIMER_CC_CHANNEL1, sdu_sync_ref_us, true); nrfx_timer_compare(&sync_toggle_timer_instance, NRF_TIMER_CC_CHANNEL1, sdu_sync_ref_us, true);
alternate_toggle_state = ALTERNATE_TOGGLE_STATE_W4_SDU_SYNC_REF; alternate_toggle_state = ALTERNATE_TOGGLE_STATE_W4_SDU_SYNC_REF;
} }
@@ -541,9 +541,6 @@ int main(void)
nrfx_timer_enable(&sync_toggle_timer_instance); nrfx_timer_enable(&sync_toggle_timer_instance);
alternate_toggle_state = ALTERNATE_TOGGLE_STATE_IDLE; alternate_toggle_state = ALTERNATE_TOGGLE_STATE_IDLE;
// simulate received packet
setup_sdu_sync_to_audio_out_timer(100000);
/* incoming events and data from the controller */ /* incoming events and data from the controller */
static K_FIFO_DEFINE(rx_queue); static K_FIFO_DEFINE(rx_queue);
int err; int err;
@@ -596,11 +593,6 @@ int main(void)
gpio_pin_configure_dt(&alternate_toggle_pin, GPIO_OUTPUT_INACTIVE); gpio_pin_configure_dt(&alternate_toggle_pin, GPIO_OUTPUT_INACTIVE);
#endif #endif
// try to toggle pin
while (1) {
gpio_pin_toggle_dt( &alternate_toggle_pin );
}
bt_hci_raw_cmd_ext_register(&cmd_list, 1); bt_hci_raw_cmd_ext_register(&cmd_list, 1);
#endif #endif
@@ -637,6 +629,12 @@ int main(void)
// get rx timestamp = sdu sync reference: Packet Type (1) | ISO Header (4) | Timestamp (if TS flag is set) // get rx timestamp = sdu sync reference: Packet Type (1) | ISO Header (4) | Timestamp (if TS flag is set)
uint32_t timestamp_sdu_sync_reference_us = little_endian_read_32(packet, 5); uint32_t timestamp_sdu_sync_reference_us = little_endian_read_32(packet, 5);
// schedule SDU Sync Ref to Audio Out Toggle
if (alternate_toggle_state == ALTERNATE_TOGGLE_STATE_IDLE) {
int32_t sdu_sync_ref_delta_us = (int32_t)(timestamp_sdu_sync_reference_us - timestamp_toggle_us);
setup_sdu_sync_to_audio_out_timer(sdu_sync_ref_delta_us);
}
// calculate time of toggle relative to sdu sync reference (usually negative as the packet is received before it should be played) // calculate time of toggle relative to sdu sync reference (usually negative as the packet is received before it should be played)
int32_t delta_us = (int32_t)(timestamp_toggle_us - timestamp_sdu_sync_reference_us); int32_t delta_us = (int32_t)(timestamp_toggle_us - timestamp_sdu_sync_reference_us);