2009 lines
78 KiB
C++
2009 lines
78 KiB
C++
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#define RADIOLIB_STATIC_ONLY 1
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#include "RadioLibWrappers.h"
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#include "RadioInterruptEvents.h"
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#include <new>
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#if defined(ESP32_PLATFORM)
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#include <esp_heap_caps.h>
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#elif defined(NRF52_PLATFORM)
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#include <utility/debug.h>
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#elif defined(STM32_PLATFORM)
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#include <sys/types.h>
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extern "C" caddr_t _sbrk(int increment);
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#endif
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#define STATE_IDLE 0
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#define STATE_RX 1
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#define STATE_TX_WAIT 3
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#define STATE_TX_DONE 4
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// Bounded noise-floor calibration in continuous RX, including RXPS refreshes.
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// Requests are coalesced so retries cannot repeatedly force continuous RX.
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#define NF_CALIB_INTERVAL_MS 2000UL // continuous-RX refresh / forced-window cooldown
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// A quiet block needs about 3.2 s of continuous RX. Do not reopen one after
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// only 2 s of duty cycling: routine maintenance would defeat RX power saving.
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#define NF_RXPS_REFRESH_INTERVAL_MS (60UL * 1000UL)
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#define NF_CALIB_TIMEOUT_MS NoiseFloorEstimator::WINDOW_TIMEOUT_MS
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#define NF_CONTINUOUS_TIMEOUT_MS NoiseFloorEstimator::WINDOW_TIMEOUT_MS
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#define NF_CALIB_SETTLE_MS RadioLibWrapper::NoiseFloorSettleMillis
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// A profile normally visited for less than its RSSI settle time stays fast
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// during ordinary scanning. Refresh its floor with one bounded slow-visit
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// sample set every fifteen minutes instead.
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#define NF_FAST_PROFILE_REFRESH_INTERVAL_MS (15UL * 60UL * 1000UL)
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// RadioLib callbacks carry no context. The internal STM32WLx radio needs one
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// physical slot; other classes retain two, including external STM32 radios.
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// Dual-profile scanning uses one slot. ISR storage has static lifetime, so a
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// callback already in flight cannot access a destroyed/rebound wrapper.
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#define RADIO_INTERRUPT_INTERNAL_CustomSTM32WLx 1
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#define RADIO_INTERRUPT_INTERNAL_(radio) RADIO_INTERRUPT_INTERNAL_##radio
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#define RADIO_INTERRUPT_INTERNAL(radio) RADIO_INTERRUPT_INTERNAL_(radio)
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#if RADIO_INTERRUPT_INTERNAL(RADIO_CLASS)
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#define RADIO_INTERRUPT_SLOT_COUNT 1
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#else
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#define RADIO_INTERRUPT_SLOT_COUNT 2
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#endif
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#undef RADIO_INTERRUPT_INTERNAL
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#undef RADIO_INTERRUPT_INTERNAL_
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#undef RADIO_INTERRUPT_INTERNAL_CustomSTM32WLx
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static RadioInterruptEvents radio_interrupt_events[RADIO_INTERRUPT_SLOT_COUNT];
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static RadioLibWrapper* radio_interrupt_owners[RADIO_INTERRUPT_SLOT_COUNT] = {};
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// The Adafruit nRF52 core's micros() falls back to 1024 Hz RTOS ticks when
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// DWT is disabled. A sub-millisecond retune then appears to take exactly
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// 977 us (or 1953 us across two ticks), making the learned switch allowance
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// and scan dwell inaccurate. On nRF52, RTC2 provides a 32768 Hz profile clock
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// without changing micros() globally or holding the high-frequency clock on.
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// Keep it stopped in the ordinary single-profile mode.
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static void syncProfileClock(bool dual_profile) {
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#if defined(NRF52_PLATFORM)
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static bool active = false;
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if (active == dual_profile) return;
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if (dual_profile) {
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NRF_RTC2->TASKS_STOP = 1;
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NRF_RTC2->PRESCALER = 0;
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NRF_RTC2->TASKS_CLEAR = 1;
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NRF_RTC2->TASKS_START = 1;
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} else {
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NRF_RTC2->TASKS_STOP = 1;
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}
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active = dual_profile;
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#else
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(void) dual_profile;
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#endif
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}
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static uint32_t profileTimestamp(bool dual_profile) {
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syncProfileClock(dual_profile);
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#if defined(NRF52_PLATFORM)
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if (dual_profile) return NRF_RTC2->COUNTER;
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#endif
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return micros();
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}
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static uint32_t profileElapsedUs(uint32_t since, uint32_t now, bool dual_profile) {
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#if defined(NRF52_PLATFORM)
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if (!dual_profile) return now - since;
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// RTC2 is 24-bit and wraps every 512 seconds. Active scanning samples it
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// many times per second; a freshly configured profile gets a new visit stamp.
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const uint32_t ticks = (now - since) & 0x00ffffffUL;
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return static_cast<uint32_t>((uint64_t(ticks) * 15625 + 511) >> 9);
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#else
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(void) dual_profile;
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return now - since;
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#endif
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}
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static
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#if defined(ESP8266) || defined(ESP32)
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ICACHE_RAM_ATTR
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#endif
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void setFlag0() { radio_interrupt_events[0].record(); }
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#if RADIO_INTERRUPT_SLOT_COUNT > 1
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static
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#if defined(ESP8266) || defined(ESP32)
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ICACHE_RAM_ATTR
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#endif
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void setFlag1() { radio_interrupt_events[1].record(); }
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#endif
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bool RadioLibWrapper::registerInterruptAction() {
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_loop_event_pending = false;
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#if RADIO_INTERRUPT_SLOT_COUNT == 1
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// There is only one integrated radio. Ownership is still checked so a
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// second wrapper cannot steal its callback or consume its pending event.
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if (radio_interrupt_owners[0] != nullptr && radio_interrupt_owners[0] != this) {
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_interrupt_slot = 0xff;
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return false;
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}
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radio_interrupt_owners[0] = this;
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_interrupt_slot = 0;
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_radio->clearPacketReceivedAction();
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radio_interrupt_events[0].claim();
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_radio->setPacketReceivedAction(setFlag0);
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#else
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if (_interrupt_slot >= RADIO_INTERRUPT_SLOT_COUNT || radio_interrupt_owners[_interrupt_slot] != this) {
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_interrupt_slot = 0xff;
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for (uint8_t i = 0; i < RADIO_INTERRUPT_SLOT_COUNT; ++i) {
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if (radio_interrupt_owners[i] == nullptr) {
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radio_interrupt_owners[i] = this;
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_interrupt_slot = i;
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break;
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}
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}
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}
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if (_interrupt_slot >= RADIO_INTERRUPT_SLOT_COUNT) return false;
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_radio->clearPacketReceivedAction();
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radio_interrupt_events[_interrupt_slot].claim();
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_radio->setPacketReceivedAction(_interrupt_slot == 0 ? setFlag0 : setFlag1);
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#endif
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return true;
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}
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void RadioLibWrapper::unregisterInterruptAction() {
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#if RADIO_INTERRUPT_SLOT_COUNT == 1
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if (radio_interrupt_owners[0] == this) {
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_radio->clearPacketReceivedAction();
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radio_interrupt_owners[0] = nullptr;
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}
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#else
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if (_interrupt_slot < RADIO_INTERRUPT_SLOT_COUNT && radio_interrupt_owners[_interrupt_slot] == this) {
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_radio->clearPacketReceivedAction();
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radio_interrupt_owners[_interrupt_slot] = nullptr;
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}
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#endif
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_interrupt_slot = 0xff;
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}
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bool RadioLibWrapper::hasPendingRadioInterrupt() const {
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return _loop_event_pending || (_interrupt_slot < RADIO_INTERRUPT_SLOT_COUNT && radio_interrupt_events[_interrupt_slot].pending());
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}
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bool RadioLibWrapper::claimRadioInterrupt() {
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const bool startup = _loop_event_pending;
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_loop_event_pending = false;
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const bool interrupt = _interrupt_slot < RADIO_INTERRUPT_SLOT_COUNT && radio_interrupt_events[_interrupt_slot].claim();
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return startup || interrupt;
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}
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void RadioLibWrapper::begin() {
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syncProfileClock(_profiles.enabled());
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#ifdef USE_CC310_HW_CRYPTO
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// Initialize CryptoCell once from normal task context. The session helper
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// still initializes lazily if an earlier crypto operation runs first.
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(void) mesh::initializeCC310Crypto();
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#endif
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if (!registerInterruptAction()) {
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MESH_DEBUG_PRINTLN("RadioLibWrapper: no interrupt callback slot");
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return;
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}
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_radio->setPreambleLength(currentPreambleLength()); // longer preamble for lower SF improves reliability
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#if defined(LORA_FREQ) && defined(LORA_BW) && defined(LORA_SF)
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if (!_params_valid) {
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#ifdef LORA_CR
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const uint8_t initial_cr = LORA_CR;
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#else
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const uint8_t initial_cr = 5;
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#endif
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cacheParams(LORA_FREQ, LORA_BW, LORA_SF, initial_cr);
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_profiles.primary.freq = LORA_FREQ;
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_profiles.primary.bw = LORA_BW;
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_profiles.primary.sf = LORA_SF;
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_profiles.primary.cr = initial_cr;
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}
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#endif
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#ifdef LORA_TX_POWER
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if (!_dbm_valid) {
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_cur_dbm = LORA_TX_POWER;
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_dbm_valid = true;
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}
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#endif
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state = STATE_IDLE;
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if (_board->getStartupReason() == BD_STARTUP_RX_PACKET) { // received a LoRa packet (while in deep sleep)
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_loop_event_pending = true; // Main-owned wake event; ISR remains sole publisher
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}
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_noise_floor = 0;
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_noise_floor_centi_dbm = 0;
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_noise_floor_secondary_centi_dbm = 0;
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_noise_floor_valid = false;
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_noise_floor_secondary_valid = false;
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_threshold = 0;
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_cad_enabled = false;
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_rx_mode_checked_at = millis();
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_rx_mode_failures = 0;
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_last_rssi = 0;
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_last_snr = 0;
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_rx_hold_continuous = false;
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// start average out some samples
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_floor_estimator.reset(true);
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_secondary_floor_estimator.reset(true);
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_nf_calib_active = false;
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_nf_last_calib = 0;
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_nf_sample_from = 0;
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_nf_refresh_requested = true; // establish one baseline after startup
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// Arm the bounded sampling window only after the radio actually reaches RX.
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// Companion initialization can take longer than the window itself.
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_nf_calib_deadline = 0;
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}
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uint32_t RadioLibWrapper::getRngSeed() {
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return _radio->random(0x7FFFFFFF);
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}
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bool RadioLibWrapper::setTxPower(int8_t dbm) {
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// A CW power-meter sweep may re-key the carrier. During Morse that would
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// turn an inter-symbol gap into RF and corrupt the text, so keep the whole
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// message exclusive (including cleanup retries).
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if ((_morse_owned
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#if MESH_ENABLE_MORSE_RX
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|| _morse_rx_owned
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#endif
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) && _cw_active) return false;
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if (_cw_active) {
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if (_cw_stopping) return false;
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// Permit meter sweeps through the board's normal power/PA calibration.
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// SX127x's power setter enters standby, so re-key without resetting the
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// modem or extending the original CW deadline.
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if (applyCachedTxPower(dbm) != RADIOLIB_ERR_NONE) {
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stopCarrierWave();
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return false;
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}
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if (_radio->transmitDirect() != RADIOLIB_ERR_NONE) {
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stopCarrierWave();
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return false;
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}
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_cur_dbm = dbm;
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_dbm_valid = true;
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return true;
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}
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const uint8_t resume_rx = beginReconfigure();
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if (resume_rx > 1) return false;
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const int16_t status = applyCachedTxPower(dbm);
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if (status == RADIOLIB_ERR_NONE) {
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_cur_dbm = dbm;
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_dbm_valid = true;
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} else {
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MESH_DEBUG_PRINTLN("RadioLibWrapper: TX power %d rejected (%d)",
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(int)dbm, (int)status);
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}
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endReconfigure(resume_rx);
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return status == RADIOLIB_ERR_NONE;
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}
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uint8_t RadioLibWrapper::beginReconfigure() {
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if (_cw_active) return 2;
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const uint8_t base_state = state;
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// On SX126x/LR11xx duty-cycle RX, BUSY may remain asserted during the sleep
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// side of the cycle. Do not issue an IRQ/preamble query over SPI then; due
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// scheduled work will retry as soon as the next safe listen window opens.
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if (hasPendingRadioInterrupt() || base_state == STATE_TX_WAIT
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|| isChipBusy() || isReceivingPacket()) {
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return 2;
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}
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const bool resume_rx = base_state == STATE_RX;
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if (_rx_ps_armed) {
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stopReceiveDutyCycle();
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} else if (resume_rx) {
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_radio->standby();
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}
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// An RX completion during standby still owns its FIFO and old profile.
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// Defer reconfiguration until recvRaw consumes it, rather than rearming and
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// clearing that completion as part of endReconfigure().
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if (hasPendingRadioInterrupt()) return 2;
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state = STATE_IDLE;
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return resume_rx;
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}
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void RadioLibWrapper::endReconfigure(bool resume_rx) {
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if (resume_rx) startRecv();
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}
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bool RadioLibWrapper::restoreAfterDeepInit() {
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if (!radioDeepInit()) return false;
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_rx_ps_armed = false;
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state = STATE_IDLE;
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if (!registerInterruptAction()) return false;
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bool restored;
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if (_params_valid) {
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restored = applyParams(_cur_freq, _cur_bw, _cur_sf, _cur_cr);
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} else {
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restored = _radio->setPreambleLength(currentPreambleLength())
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== RADIOLIB_ERR_NONE;
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}
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#if MESH_ENABLE_MESHTEXT_CHAT
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restored = restored && applyProtocol(_physical_protocol);
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#endif
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if (_dbm_valid) {
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restored = applyCachedTxPower(_cur_dbm) == RADIOLIB_ERR_NONE && restored;
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}
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if (_rx_boosted_gain_valid) {
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restored = applyRxBoostedGainMode(_cur_rx_boosted_gain) && restored;
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}
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recalibrateNoiseFloor();
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return restored;
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}
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mesh::RadioParamApplyResult RadioLibWrapper::trySetParams(float freq, float bw, uint8_t sf, uint8_t cr,
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const uint32_t* rx_ps_timings) {
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if (rx_ps_timings != NULL && !supportsRxPowerSaving()) {
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return mesh::RadioParamApplyResult::FAILED;
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}
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uint8_t resume_rx = beginReconfigure();
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if (resume_rx > 1) return mesh::RadioParamApplyResult::BUSY;
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const bool had_previous_params = _params_valid;
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const float previous_freq = _cur_freq;
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const float previous_bw = _cur_bw;
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const uint8_t previous_sf = _cur_sf;
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const uint8_t previous_cr = _cur_cr;
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const uint16_t previous_preamble = _physical_preamble;
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#if MESH_ENABLE_MESHTEXT_CHAT
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const auto previous_protocol = _physical_protocol;
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#endif
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const uint8_t previous_profile = _active_profile;
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const uint32_t previous_generation = _profile_generation;
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const bool previous_refresh = _profile_refresh_required;
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const bool previous_rxps = _rx_ps_enabled;
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const bool previous_saved_rxps = _profile_saved_rxps;
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const bool previous_fallback = _rx_ps_continuous_fallback;
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const uint32_t previous_rx_us = _rx_ps_rx_us, previous_sleep_us = _rx_ps_sleep_us;
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mesh::RadioProfileParams requested = _profiles.primary;
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requested.freq = freq; requested.bw = bw; requested.sf = sf; requested.cr = cr;
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const auto previous_primary = _profiles.primary;
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_profiles.primary = requested;
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_physical_preamble = profilePreamble(0);
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bool success = applyParams(freq, bw, sf, cr);
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#if MESH_ENABLE_MESHTEXT_CHAT
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success = success && applyProtocol(requested.protocol);
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if (success) _physical_protocol = requested.protocol;
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#endif
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if (success) {
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cacheParams(freq, bw, sf, cr);
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_active_profile = 0;
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if (rx_ps_timings != NULL) {
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if (_profile_rxps_suspended) _profile_saved_rxps = true;
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else _rx_ps_enabled = true;
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_rx_ps_rx_us = rx_ps_timings[0];
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_rx_ps_sleep_us = rx_ps_timings[1];
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_rx_ps_continuous_fallback = rxPowerSavingUsesContinuousFallback(
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_rx_ps_rx_us, _rx_ps_sleep_us);
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}
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endReconfigure(resume_rx);
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success = !resume_rx || isInRecvMode();
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}
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if (success) {
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_profiles.primary = previous_primary;
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_profiles.setPrimary(requested, _profiles.primary_temporary);
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_profile_generation = _profiles.generation[0];
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_profile_refresh_required = false;
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} else {
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// RX resume is part of a primary command just as it is for scan hops.
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// Restore the active physical profile and power policy before recovery;
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// neither a saved command nor a temporary lease may commit a deaf radio.
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_profiles.primary = previous_primary;
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cacheParams(previous_freq, previous_bw, previous_sf, previous_cr);
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_params_valid = had_previous_params;
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_active_profile = previous_profile;
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_profile_generation = previous_generation;
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_profile_refresh_required = previous_refresh;
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_physical_preamble = previous_preamble;
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#if MESH_ENABLE_MESHTEXT_CHAT
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_physical_protocol = previous_protocol;
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#endif
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_rx_ps_enabled = previous_rxps;
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_profile_saved_rxps = previous_saved_rxps;
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_rx_ps_continuous_fallback = previous_fallback;
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_rx_ps_rx_us = previous_rx_us;
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_rx_ps_sleep_us = previous_sleep_us;
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bool restored = had_previous_params
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&& _radio->standby() == RADIOLIB_ERR_NONE
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&& applyParams(previous_freq, previous_bw, previous_sf, previous_cr);
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#if MESH_ENABLE_MESHTEXT_CHAT
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restored = restored && applyProtocol(previous_protocol);
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#endif
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if (!restored) restored = restoreAfterDeepInit();
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if (restored) endReconfigure(resume_rx);
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if (!restored || (resume_rx && !isInRecvMode())) _profile_refresh_required = true;
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if (!restored) {
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MESH_DEBUG_PRINTLN("RadioLibWrapper: failed to restore radio parameters after apply failure");
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}
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}
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_profile_visit_stamp = profileTimestamp(_profiles.enabled());
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return success ? mesh::RadioParamApplyResult::APPLIED : mesh::RadioParamApplyResult::FAILED;
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}
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bool RadioLibWrapper::validateProfile(const mesh::RadioProfileParams& p) const {
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if (!mesh::RadioProfiles::valid(p)) return false;
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if (p.protocol == mesh::RadioProfileProtocol::Meshtext && !supportsMeshtext()) return false;
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#if defined(USE_SX1276)
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return p.freq >= 137 && p.freq <= 1020 && p.sf >= 7 && p.bw <= 500;
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#elif defined(USE_SX1272)
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return p.freq >= 860 && p.freq <= 1020 && p.sf >= 7 && p.bw >= 125 && p.bw <= 500;
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#elif defined(USE_LLCC68)
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return p.freq >= 150 && p.freq <= 960
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&& ((p.bw == 125 && p.sf <= 9) || (p.bw == 250 && p.sf <= 10)
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|| (p.bw == 500 && p.sf <= 11));
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#elif defined(USE_LR2021)
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return (p.freq <= 1090 || p.freq >= 1900) && p.bw >= 31.25 && p.bw <= 1000;
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#elif defined(USE_LR1110)
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return p.freq <= 960 && p.bw >= 62.5 && p.bw <= 500;
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#elif defined(USE_SX1268)
|
|
return p.freq >= 410 && p.freq <= 810 && p.bw <= 500;
|
|
#else
|
|
return p.freq <= 960 && p.bw <= 500;
|
|
#endif
|
|
}
|
|
|
|
mesh::RadioParamApplyResult RadioLibWrapper::tuneProfile(uint8_t profile) {
|
|
if (_cw_active) return mesh::RadioParamApplyResult::BUSY;
|
|
if (profile > 1 || (profile == 1 && !_profiles.enabled())) return mesh::RadioParamApplyResult::FAILED;
|
|
const auto& p = _profiles.params(profile);
|
|
const uint16_t preamble = profilePreamble(profile);
|
|
if (!_profile_refresh_required && _active_profile == profile && _profile_generation == _profiles.generation[profile]
|
|
&& _physical_preamble == preamble) return mesh::RadioParamApplyResult::APPLIED;
|
|
if (!validateProfile(p)) return mesh::RadioParamApplyResult::FAILED;
|
|
const bool dual_profile = _profiles.enabled();
|
|
const uint32_t started = profileTimestamp(dual_profile);
|
|
beginProfileRetune(isInRecvMode() && !_rx_ps_armed && !_rx_ps_enabled);
|
|
const uint8_t resume = beginReconfigure();
|
|
if (resume > 1) {
|
|
endProfileRetune(true); // guard deferred before changing hardware
|
|
return mesh::RadioParamApplyResult::BUSY;
|
|
}
|
|
const float old_freq = _cur_freq, old_bw = _cur_bw;
|
|
const uint8_t old_sf = _cur_sf, old_cr = _cur_cr, old_profile = _active_profile;
|
|
const uint32_t old_generation = _profile_generation;
|
|
const bool old_refresh = _profile_refresh_required;
|
|
const bool old_params_valid = _params_valid;
|
|
const uint16_t old_preamble = _physical_preamble;
|
|
#if MESH_ENABLE_MESHTEXT_CHAT
|
|
const auto old_protocol = _physical_protocol;
|
|
#endif
|
|
_physical_preamble = preamble;
|
|
bool applied = applyParams(p.freq, p.bw, p.sf, p.cr);
|
|
#if MESH_ENABLE_MESHTEXT_CHAT
|
|
// Changing only the protocol still changes the sync word. Conversely a
|
|
// failed write must not publish the new generation or cached wire format.
|
|
if (applied && (_physical_protocol != p.protocol || _profile_refresh_required)) {
|
|
applied = applyProtocol(p.protocol);
|
|
}
|
|
if (applied) _physical_protocol = p.protocol;
|
|
#endif
|
|
if (applied) {
|
|
cacheParams(p.freq, p.bw, p.sf, p.cr);
|
|
_active_profile = profile;
|
|
_profile_generation = _profiles.generation[profile];
|
|
_profile_refresh_required = false;
|
|
endReconfigure(resume);
|
|
applied = !resume || isInRecvMode();
|
|
}
|
|
endProfileRetune(applied);
|
|
if (applied) {
|
|
++_profiles.switches;
|
|
} else {
|
|
++_profiles.switch_failures;
|
|
// RX restart is part of the transaction, not merely a best-effort tail.
|
|
// Revoke any fast-RX capability and restore both the physical tuple and
|
|
// published profile on an apply or receive-resume failure.
|
|
cacheParams(old_freq, old_bw, old_sf, old_cr);
|
|
_params_valid = old_params_valid;
|
|
_active_profile = old_profile;
|
|
_profile_generation = old_generation;
|
|
_profile_refresh_required = old_refresh;
|
|
_physical_preamble = old_preamble;
|
|
#if MESH_ENABLE_MESHTEXT_CHAT
|
|
_physical_protocol = old_protocol;
|
|
#endif
|
|
bool restored = old_params_valid && _radio->standby() == RADIOLIB_ERR_NONE
|
|
&& applyParams(old_freq, old_bw, old_sf, old_cr);
|
|
#if MESH_ENABLE_MESHTEXT_CHAT
|
|
restored = restored && applyProtocol(old_protocol);
|
|
#endif
|
|
if (!restored) restored = restoreAfterDeepInit();
|
|
if (restored) endReconfigure(resume);
|
|
if (!restored || (resume && !isInRecvMode())) _profile_refresh_required = true;
|
|
}
|
|
_profile_visit_stamp = profileTimestamp(dual_profile);
|
|
// A profile retune re-enters RX on a different tuple. Do not read its
|
|
// instantaneous RSSI until the chip family's settle interval has elapsed.
|
|
if (applied && _nf_refresh_requested) {
|
|
_nf_sample_from = millis() + NF_CALIB_SETTLE_MS;
|
|
}
|
|
const uint32_t elapsed = profileElapsedUs(started, _profile_visit_stamp, dual_profile);
|
|
if (elapsed > _profiles.longest_switch_us) _profiles.longest_switch_us = elapsed;
|
|
// Require four good RX-to-RX hops in each direction before using the budget,
|
|
// then continue raising the observed maximum as later good hops run.
|
|
// Deferred and rolled-back operations are not samples.
|
|
if (applied && resume && old_profile != profile) {
|
|
_profiles.sampleSwitch(old_profile, profile, elapsed);
|
|
}
|
|
return applied ? mesh::RadioParamApplyResult::APPLIED : mesh::RadioParamApplyResult::FAILED;
|
|
}
|
|
|
|
mesh::RadioParamApplyResult RadioLibWrapper::prepareTransmitProfile(uint8_t profile) {
|
|
return prepareTransmitProfile(profile, false);
|
|
}
|
|
|
|
mesh::RadioParamApplyResult RadioLibWrapper::prepareTransmitProfile(uint8_t profile, bool reply_rx_override) {
|
|
if (!_profiles.canTransmit(profile, reply_rx_override)) return mesh::RadioParamApplyResult::FAILED;
|
|
if (_profiles.enabled() && (isChipBusy() || isPacketPendingOrReceiving())) {
|
|
return mesh::RadioParamApplyResult::BUSY;
|
|
}
|
|
return tuneProfile(profile);
|
|
}
|
|
|
|
mesh::RadioParamApplyResult RadioLibWrapper::tryRestoreCodingRate(uint8_t cr) {
|
|
const uint8_t resume_rx = beginReconfigure();
|
|
if (resume_rx > 1) return mesh::RadioParamApplyResult::BUSY;
|
|
bool applied = setCodingRate(cr);
|
|
endReconfigure(resume_rx);
|
|
applied = applied && (!resume_rx || isInRecvMode());
|
|
if (!applied) _profile_refresh_required = true;
|
|
return applied ? mesh::RadioParamApplyResult::APPLIED : mesh::RadioParamApplyResult::FAILED;
|
|
}
|
|
|
|
void RadioLibWrapper::serviceProfileScan() {
|
|
syncProfileClock(_profiles.enabled());
|
|
if (_cw_active) return;
|
|
if (!_params_valid || (_profile_retry_at && (int32_t)(millis() - _profile_retry_at) < 0)) return;
|
|
_profile_retry_at = 0;
|
|
if (_profiles.enabled() && !_profile_rxps_suspended) {
|
|
const uint8_t resume = beginReconfigure();
|
|
if (resume > 1) return;
|
|
_profile_saved_rxps = _rx_ps_enabled;
|
|
_rx_ps_enabled = false;
|
|
_profile_rxps_suspended = true;
|
|
_nf_calib_active = false;
|
|
// Each profile owns a floor. Start fresh, independent baselines so RSSI
|
|
// values from two frequencies are never blended into one estimate.
|
|
_noise_floor_valid = false;
|
|
_noise_floor_secondary_valid = false;
|
|
_nf_refresh_requested = true;
|
|
_nf_last_calib = 0;
|
|
_nf_calib_deadline = 0;
|
|
_floor_estimator.reset(true);
|
|
_secondary_floor_estimator.reset(true);
|
|
_profile_refresh_required = true; // refresh side detectors even if the tuple is unchanged
|
|
setProfileStandbyWarm(true);
|
|
endReconfigure(resume);
|
|
}
|
|
if (_profiles.enabled() && !_profiles.switchTestReady()) {
|
|
// A bounded startup self-test uses the real RX-to-RX retune path for the
|
|
// active pair. Keep the 128-symbol provisional preamble until four good
|
|
// samples in each direction are available. A packet, TX, or BUSY radio
|
|
// defers the remaining hops without counting an invalid measurement.
|
|
for (uint8_t hops = 0; hops < 2 * mesh::RadioProfiles::SwitchTestSamplesPerDirection;
|
|
++hops) {
|
|
if (_profiles.switchTestReady()) break;
|
|
const uint8_t from = _active_profile;
|
|
const uint8_t samples = _profiles.switch_test_samples[from];
|
|
const auto test_result = tuneProfile(from ^ 1);
|
|
if (test_result == mesh::RadioParamApplyResult::FAILED) {
|
|
_profile_retry_at = millis() + 1000;
|
|
tuneProfile(0);
|
|
return;
|
|
}
|
|
if (test_result != mesh::RadioParamApplyResult::APPLIED
|
|
|| (samples < mesh::RadioProfiles::SwitchTestSamplesPerDirection
|
|
&& _profiles.switch_test_samples[from] == samples)) return;
|
|
}
|
|
if (!_profiles.switchTestReady()) return;
|
|
}
|
|
uint8_t target = _active_profile;
|
|
const bool restart_scan = _profiles.enabled()
|
|
&& (_profile_scan_generation[0] != _profiles.generation[0]
|
|
|| _profile_scan_generation[1] != _profiles.generation[1]);
|
|
if (restart_scan) {
|
|
// A profile changed while scanning. Discard both partial baselines before
|
|
// the first visit on the replacement tuples.
|
|
_noise_floor_valid = false;
|
|
_noise_floor_secondary_valid = false;
|
|
_nf_refresh_requested = true;
|
|
_nf_last_calib = 0;
|
|
_nf_calib_deadline = 0;
|
|
_floor_estimator.reset(true);
|
|
_secondary_floor_estimator.reset(true);
|
|
}
|
|
if (!_profiles.enabled()) target = 0;
|
|
else if (restart_scan) target = _profiles.slowerProfile();
|
|
else {
|
|
uint32_t visit_us = _profiles.listenUs(
|
|
_active_profile, profilePreamble(_profiles.slowerProfile()));
|
|
// A normal visit can be shorter than the RSSI settle interval on some
|
|
// chips. Hold only a visit that is actually due to contribute its next
|
|
// 50ms-spaced sample; very fast profiles otherwise retain their ordinary
|
|
// scan cadence throughout calibration.
|
|
const NoiseFloorEstimator& estimator = profileFloorEstimator(_active_profile);
|
|
if (_nf_refresh_requested && estimator.ready(static_cast<uint32_t>(millis()))
|
|
&& visit_us < NF_CALIB_SETTLE_MS * 1000UL) {
|
|
visit_us = NF_CALIB_SETTLE_MS * 1000UL;
|
|
}
|
|
if (profileElapsedUs(_profile_visit_stamp, profileTimestamp(true), true) >= visit_us) target ^= 1;
|
|
}
|
|
const auto result = tuneProfile(target);
|
|
if (restart_scan && result == mesh::RadioParamApplyResult::APPLIED) {
|
|
_profile_scan_generation[0] = _profiles.generation[0];
|
|
_profile_scan_generation[1] = _profiles.generation[1];
|
|
_profile_visit_stamp = profileTimestamp(true);
|
|
}
|
|
if (result == mesh::RadioParamApplyResult::FAILED) {
|
|
// Retry a rejected or failing profile at a bounded rate; retain primary RX.
|
|
_profile_retry_at = millis() + 1000;
|
|
tuneProfile(0);
|
|
}
|
|
if (!_profiles.enabled() && _profile_rxps_suspended && _active_profile == 0
|
|
&& result == mesh::RadioParamApplyResult::APPLIED) {
|
|
const uint8_t resume = beginReconfigure();
|
|
if (resume > 1) return;
|
|
_rx_ps_enabled = _profile_saved_rxps;
|
|
_profile_rxps_suspended = false;
|
|
_profile_refresh_required = true;
|
|
setProfileStandbyWarm(false);
|
|
recalibrateNoiseFloor();
|
|
endReconfigure(resume);
|
|
}
|
|
}
|
|
|
|
uint32_t RadioLibWrapper::getProfileAirtime(uint8_t profile, int len, uint8_t cr) {
|
|
if (!_profiles.enabled() && profile == 0 && cr == 0) return getEstAirtimeFor(len);
|
|
const auto& p = _profiles.params(profile);
|
|
const double symbol = mesh::RadioProfiles::symbolUs(p);
|
|
if (symbol <= 0 || len < 0) return 0;
|
|
if (cr < 5 || cr > 8) cr = p.cr;
|
|
const int de = symbol >= 16000 ? 1 : 0;
|
|
const double coded = ceil((8.0 * len - 4 * p.sf + (p.sf <= 6 ? 20 : 28) + 16)
|
|
/ (4 * (p.sf - 2 * de)));
|
|
const double payload_symbols = 8 + (coded > 0 ? coded * cr : 0);
|
|
const double suffix = p.sf <= 6 ? 6.25 : 4.25;
|
|
return (uint32_t)ceil((profilePreamble(profile) + suffix + payload_symbols) * symbol / 1000.0);
|
|
}
|
|
|
|
bool RadioLibWrapper::setParams(float freq, float bw, uint8_t sf, uint8_t cr,
|
|
const uint32_t* rx_ps_timings) {
|
|
return trySetParams(freq, bw, sf, cr, rx_ps_timings) == mesh::RadioParamApplyResult::APPLIED;
|
|
}
|
|
|
|
mesh::RadioParamApplyResult RadioLibWrapper::trySetPrimaryParams(const mesh::RadioProfileParams& p,
|
|
bool temporary, const uint32_t* timings) {
|
|
auto preview = _profiles;
|
|
preview.setPrimary(p, temporary);
|
|
if (!validateProfile(p) || !preview.automaticPreambleFits()) return mesh::RadioParamApplyResult::FAILED;
|
|
const auto previous = _profiles.primary;
|
|
const bool was_temp = _profiles.primary_temporary;
|
|
const uint32_t generation = _profiles.generation[0];
|
|
_profiles.primary.preamble = p.preamble;
|
|
_profiles.primary.protocol = p.protocol;
|
|
_profiles.primary_temporary = temporary;
|
|
const auto result = trySetParams(p.freq, p.bw, p.sf, p.cr, timings);
|
|
if (result != mesh::RadioParamApplyResult::APPLIED) {
|
|
_profiles.primary = previous;
|
|
_profiles.primary_temporary = was_temp;
|
|
_profiles.generation[0] = generation;
|
|
} else {
|
|
const bool changed = previous != p || was_temp != temporary;
|
|
_profiles.generation[0] = generation + changed;
|
|
// Preamble and lease flags are staged before trySetParams(), so its
|
|
// setPrimary() cannot detect a change limited to those fields.
|
|
if (changed) _profiles.resetSwitchTest();
|
|
_profile_generation = _profiles.generation[0];
|
|
}
|
|
return result;
|
|
}
|
|
|
|
bool RadioLibWrapper::setRxBoostedGainMode(bool enabled) {
|
|
uint8_t resume_rx = beginReconfigure();
|
|
if (resume_rx > 1) return false;
|
|
|
|
const bool gain_changed = !_rx_boosted_gain_valid || _cur_rx_boosted_gain != enabled;
|
|
bool success = applyRxBoostedGainMode(enabled);
|
|
if (success) {
|
|
_cur_rx_boosted_gain = enabled;
|
|
_rx_boosted_gain_valid = true;
|
|
if (gain_changed) recalibrateNoiseFloor();
|
|
}
|
|
|
|
endReconfigure(resume_rx);
|
|
return success;
|
|
}
|
|
|
|
void RadioLibWrapper::idle() {
|
|
if (_cw_active) return;
|
|
_radio->standby();
|
|
_rx_hold_continuous = false;
|
|
state = STATE_IDLE; // need another startReceive()
|
|
}
|
|
|
|
bool RadioLibWrapper::setTrackerSleep(bool sleeping) {
|
|
if (_cw_active || (state & 0x0f) == STATE_TX_WAIT) return false;
|
|
if (sleeping && isPacketPendingOrReceiving()) return false;
|
|
if (_radio->standby() != RADIOLIB_ERR_NONE) return false;
|
|
_rx_ps_armed = false;
|
|
_rx_hold_continuous = false;
|
|
state = STATE_IDLE;
|
|
// PhysicalLayer's no-argument sleep retains configuration on SX126x and
|
|
// LR11x0. The board's powerOff() intentionally uses cold sleep on some
|
|
// radios and must not be used for a scheduled tracker wake.
|
|
return !sleeping || _radio->sleep() == RADIOLIB_ERR_NONE;
|
|
}
|
|
|
|
void RadioLibWrapper::triggerNoiseFloorCalibrate(int threshold) {
|
|
_threshold = threshold;
|
|
// The Dispatcher calls this every two seconds. Repeatedly recalibrating a
|
|
// dual-profile scanner would repeatedly lengthen its visits. Once both
|
|
// baselines are valid, retain them until a real RF-path change—except for a
|
|
// fast profile: it receives one new bounded 7 ms-visit sample set every
|
|
// fifteen minutes. Profiles already visiting for at least 7 ms need no
|
|
// artificial slowdown after their normal baseline.
|
|
if (_profiles.enabled() && _noise_floor_valid && _noise_floor_secondary_valid) {
|
|
const uint16_t preamble = profilePreamble(_profiles.slowerProfile());
|
|
const bool fast_profile = _profiles.listenUs(0, preamble) < NF_CALIB_SETTLE_MS * 1000UL
|
|
|| _profiles.listenUs(1, preamble) < NF_CALIB_SETTLE_MS * 1000UL;
|
|
if (fast_profile && _nf_last_calib != 0
|
|
&& (uint32_t)(millis() - _nf_last_calib) >= NF_FAST_PROFILE_REFRESH_INTERVAL_MS) {
|
|
requestNoiseFloorRefresh();
|
|
}
|
|
return;
|
|
}
|
|
if (_rx_ps_enabled && !_rx_ps_continuous_fallback) {
|
|
requestPeriodicNoiseFloorRefresh();
|
|
} else {
|
|
// RX is already continuous. Keep the original maintenance-tick behavior;
|
|
// only passive retry probes apply the existing two-second age check.
|
|
requestNoiseFloorRefresh();
|
|
}
|
|
}
|
|
|
|
void RadioLibWrapper::recalibrateNoiseFloor() {
|
|
// A gain or tuning change starts a new baseline. Keep the published value
|
|
// available while discarding the old samples and rise-hold history.
|
|
_noise_floor_valid = false;
|
|
_noise_floor_secondary_valid = false;
|
|
_nf_refresh_requested = true;
|
|
_nf_last_calib = 0;
|
|
_floor_estimator.reset(true);
|
|
_secondary_floor_estimator.reset(true);
|
|
|
|
const unsigned long now = millis();
|
|
_nf_sample_from = now + NF_CALIB_SETTLE_MS;
|
|
if (_nf_calib_active) {
|
|
// Keep an already-open continuous-RX calibration window active, but restart
|
|
// its sample and timeout bounds around the newly selected gain path.
|
|
_nf_calib_deadline = now + NF_CALIB_TIMEOUT_MS;
|
|
} else {
|
|
// Continuous RX starts its deadline in loop(); RX power saving opens a
|
|
// bounded continuous-RX window in noiseFloorCalibCheck().
|
|
_nf_calib_deadline = 0;
|
|
}
|
|
}
|
|
|
|
void RadioLibWrapper::requestPeriodicNoiseFloorRefresh() {
|
|
const uint32_t interval = _rx_ps_enabled && !_rx_ps_continuous_fallback
|
|
? NF_RXPS_REFRESH_INTERVAL_MS : NF_CALIB_INTERVAL_MS;
|
|
// Startup must not wait for a maintenance tick. Subsequent attempts, even
|
|
// failed ones, need a real rest interval. Forced RF-path/AGC recalibration
|
|
// bypasses this routine policy and retains its existing prompt behavior.
|
|
if (_profiles.enabled() || (!_noise_floor_valid && _nf_last_calib == 0)
|
|
|| static_cast<uint32_t>(millis() - _nf_last_calib) >= interval) {
|
|
requestNoiseFloorRefresh();
|
|
}
|
|
}
|
|
|
|
void RadioLibWrapper::requestNoiseFloorRefresh() {
|
|
if (_nf_refresh_requested) return;
|
|
_nf_refresh_requested = true;
|
|
_floor_estimator.reset();
|
|
_secondary_floor_estimator.reset();
|
|
_nf_calib_deadline = 0; // starts when continuous RX is actually available
|
|
}
|
|
|
|
void RadioLibWrapper::doResetAGC() {
|
|
_radio->sleep(); // warm sleep to reset analog frontend
|
|
}
|
|
|
|
void RadioLibWrapper::resetAGC() {
|
|
if (_cw_active) return;
|
|
// make sure we're not mid-receiving and mid-sending of packet!
|
|
if (isPacketPendingOrReceiving() || (state == STATE_TX_WAIT)) return;
|
|
|
|
doResetAGC();
|
|
state = STATE_IDLE; // trigger a startReceive()
|
|
if (_rx_boosted_gain_valid) applyRxBoostedGainMode(_cur_rx_boosted_gain);
|
|
|
|
// AGC reset discards stale samples, but the established floor remains usable
|
|
// for LBT while the next spaced block is collected. Gain/tuning changes use
|
|
// recalibrateNoiseFloor() directly to seed a fresh baseline.
|
|
const bool previous_valid = _noise_floor_valid;
|
|
const bool previous_secondary_valid = _noise_floor_secondary_valid;
|
|
recalibrateNoiseFloor();
|
|
_noise_floor_valid = previous_valid;
|
|
_noise_floor_secondary_valid = previous_secondary_valid;
|
|
}
|
|
|
|
bool RadioLibWrapper::recoverRadio(bool hard) {
|
|
if (_cw_active) return false;
|
|
const uint8_t base_state = state;
|
|
if (hasPendingRadioInterrupt() || base_state == STATE_TX_WAIT) return false;
|
|
|
|
#ifdef RADIO_LIVENESS_SOFT_ONLY
|
|
// STM32WL integrates the radio into the MCU and has no independent reset.
|
|
// Keep its useful recovery path without linking unreachable deep-reset and
|
|
// escalation machinery into flash-constrained builds.
|
|
(void)hard;
|
|
if (isReceivingPacket()) return false;
|
|
n_wd_soft++;
|
|
MESH_DEBUG_PRINTLN("RadioLibWrapper: liveness watchdog: soft AGC/RX re-arm");
|
|
resetAGC();
|
|
return true;
|
|
#else
|
|
const bool busy = isChipBusy();
|
|
if (!busy && isReceivingPacket()) return false;
|
|
|
|
if (hard) {
|
|
n_wd_hard++;
|
|
if (supportsRadioDeepInit()) {
|
|
MESH_DEBUG_PRINTLN("RadioLibWrapper: liveness watchdog: hard radio reset");
|
|
return restoreAfterDeepInit();
|
|
}
|
|
// LR11xx and integrated radios do not all expose a safe board-level reset
|
|
// here. Fall back to their proven AGC/RX re-arm instead of reporting a
|
|
// successful no-op. A stuck BUSY pin still reports failure and is retried.
|
|
if (busy) return false;
|
|
MESH_DEBUG_PRINTLN("RadioLibWrapper: hard reset unavailable; using RX re-arm");
|
|
resetAGC();
|
|
return true;
|
|
}
|
|
|
|
// Never issue a warm-sleep/standby command while BUSY is stuck high. The
|
|
// hard stage can still escape that condition through the hardware reset pin.
|
|
if (busy) return false;
|
|
n_wd_soft++;
|
|
MESH_DEBUG_PRINTLN("RadioLibWrapper: liveness watchdog: soft AGC/RX re-arm");
|
|
resetAGC();
|
|
return true;
|
|
#endif
|
|
}
|
|
|
|
void RadioLibWrapper::rxPsWatchdogCheck() {
|
|
// don't interfere mid-transmit or with a completed-but-unread packet
|
|
// (a pending DIO1 event is itself proof the radio is alive; recvRaw() will
|
|
// re-arm and re-base the watchdog)
|
|
if (hasPendingRadioInterrupt() || state == STATE_TX_WAIT) {
|
|
_wd_observe_until = 0;
|
|
return;
|
|
}
|
|
|
|
unsigned long now = millis();
|
|
bool tripped = false;
|
|
|
|
if (_rx_ps_armed && state == STATE_RX && _wd_stuck_thresh > 0) {
|
|
bool busy = isChipBusy();
|
|
if (busy != _wd_last_busy) {
|
|
// the sleep/listen wave is present -> radio healthy
|
|
_wd_last_busy = busy;
|
|
_wd_last_transition = now;
|
|
_wd_stage = 0;
|
|
_wd_strikes = 0;
|
|
_wd_observe_until = 0;
|
|
} else if (_wd_observe_until != 0) {
|
|
// active observation window in progress (MCU kept awake via
|
|
// isWatchdogObserving()); a healthy chip must toggle BUSY within it
|
|
if ((long)(now - _wd_observe_until) >= 0) {
|
|
_wd_observe_until = 0;
|
|
if (!busy && isReceivingPacket()) {
|
|
// BUSY held low by an ongoing reception (extended RX) - alive
|
|
_wd_last_transition = now;
|
|
_wd_strikes = 0;
|
|
} else if (++_wd_strikes >= 2) {
|
|
_wd_strikes = 0;
|
|
tripped = true;
|
|
} else {
|
|
_wd_last_transition = now; // full threshold before the next window
|
|
}
|
|
}
|
|
} else if (now - _wd_last_transition > _wd_stuck_thresh) {
|
|
// no proof of life for too long: actively watch one full cycle
|
|
_wd_observe_until = now + _wd_observe_ms;
|
|
if (_wd_observe_until == 0) _wd_observe_until = 1; // 0 means "off"
|
|
}
|
|
} else {
|
|
_wd_observe_until = 0;
|
|
}
|
|
if (_startrx_fails >= 3) tripped = true; // can't even re-arm receive mode
|
|
|
|
if (!tripped) return;
|
|
|
|
_wd_last_transition = now; // grace period before the next escalation
|
|
_startrx_fails = 0;
|
|
_wd_observe_until = 0;
|
|
|
|
if (_wd_stage == 0) {
|
|
_wd_stage = 1;
|
|
n_wd_soft++;
|
|
MESH_DEBUG_PRINTLN("RadioLibWrapper: watchdog: RX duty-cycle stuck, soft re-arm");
|
|
state = STATE_IDLE; // next recvRaw() re-arms receive mode
|
|
} else {
|
|
_wd_stage = 2;
|
|
n_wd_hard++;
|
|
MESH_DEBUG_PRINTLN("RadioLibWrapper: watchdog: still stuck, hard radio reset");
|
|
restoreAfterDeepInit();
|
|
state = STATE_IDLE; // re-arm (rx powersaving settings are kept in members)
|
|
}
|
|
}
|
|
|
|
// On-demand noise-floor calibration, active only with RX duty-cycle powersaving:
|
|
// a duty-cycled receiver can't be sampled reliably (the frontend is off in the
|
|
// sleep windows and settling right after each wake), so a requested refresh
|
|
// drops receive mode to plain continuous RX, collects a fresh sample batch,
|
|
// and re-arms the duty cycle. Requests are rate-limited and coalesced.
|
|
void RadioLibWrapper::requestRestartRecv() {
|
|
// An RX interrupt can arrive between the caller's idle check and this state
|
|
// transition. Preserve that flag so the completed packet is still consumed.
|
|
if (state != STATE_TX_WAIT) state = STATE_IDLE;
|
|
}
|
|
|
|
bool RadioLibWrapper::isPacketPendingOrReceiving() {
|
|
return hasPendingRadioInterrupt() || isReceivingPacket();
|
|
}
|
|
|
|
void RadioLibWrapper::noiseFloorCalibCheck(unsigned long now) {
|
|
if (_nf_calib_active) {
|
|
if (!_rx_ps_enabled
|
|
|| ((long)(now - _nf_calib_deadline) >= 0
|
|
&& !_floor_estimator.complete())) {
|
|
// powersaving turned off mid-window, or the batch couldn't complete
|
|
// (busy channel) - keep the previous floor
|
|
endNoiseFloorCalib(now);
|
|
} else if (_rx_ps_armed && !isPacketPendingOrReceiving()) {
|
|
// A packet can delay the transition from RXPS to continuous RX. Retry
|
|
// once the radio is idle without discarding a pending interrupt.
|
|
requestRestartRecv();
|
|
}
|
|
} else if (_nf_refresh_requested && _rx_ps_enabled && _rx_ps_armed && state == STATE_RX
|
|
&& ((!_noise_floor_valid && _nf_last_calib == 0)
|
|
|| now - _nf_last_calib >= NF_CALIB_INTERVAL_MS)
|
|
&& !isPacketPendingOrReceiving()) {
|
|
// never interrupt an ongoing reception to calibrate (a TX in flight is
|
|
// already excluded by state == STATE_RX); retries next loop iteration
|
|
_nf_calib_active = true;
|
|
_nf_calib_deadline = now + NF_CALIB_TIMEOUT_MS;
|
|
_nf_sample_from = now + NF_CALIB_SETTLE_MS;
|
|
_floor_estimator.reset();
|
|
if (!isPacketPendingOrReceiving()) {
|
|
requestRestartRecv(); // startReceiveMode() selects continuous RX
|
|
}
|
|
}
|
|
}
|
|
|
|
void RadioLibWrapper::endNoiseFloorCalib(unsigned long now) {
|
|
_nf_calib_active = false;
|
|
_nf_refresh_requested = false;
|
|
_nf_last_calib = now;
|
|
_nf_calib_deadline = 0;
|
|
// force a receive re-arm back into duty-cycle mode, but don't clobber a
|
|
// completed-but-unread packet or an in-flight TX (recvRaw()/onSendFinished()
|
|
// will re-arm right after those anyway; same guard style as setRxPowerSaving)
|
|
if (state != STATE_TX_WAIT
|
|
&& !isPacketPendingOrReceiving()) {
|
|
requestRestartRecv();
|
|
}
|
|
}
|
|
|
|
void RadioLibWrapper::checkReceiveMode(uint32_t now) {
|
|
// Duty-cycle standby/sleep is expected. Never wake it for a status probe,
|
|
// touch an in-flight TX, or discard a completed/pending receive interrupt.
|
|
if (state != STATE_RX || _rx_ps_armed || isChipBusy()
|
|
|| uint32_t(now - _rx_mode_checked_at) < 10000UL) return;
|
|
_rx_mode_checked_at = now;
|
|
if (isPacketPendingOrReceiving()) return;
|
|
const int8_t mode = readReceiveMode();
|
|
if (isPacketPendingOrReceiving()) return;
|
|
if (mode < 0) return; // an SPI error is not evidence of a particular mode
|
|
if (mode == 1) {
|
|
_rx_mode_failures = 0;
|
|
return;
|
|
}
|
|
if (_rx_mode_failures < 3) ++_rx_mode_failures;
|
|
if (_rx_mode_failures < 2) return;
|
|
|
|
// Confirmed silent loss of RX (including a late RTC event after CAD).
|
|
// Reuse the existing recovery path: it preserves tuning, TX power and gain.
|
|
// A healthy status observation, rather than an accepted re-arm command,
|
|
// clears the streak. A failed soft recovery can therefore reach hard reset.
|
|
_floor_estimator.reset(true);
|
|
MESH_DEBUG_PRINTLN("RadioLibWrapper: chip left RX, %s recovery",
|
|
_rx_mode_failures < 3 ? "soft" : "hard");
|
|
recoverRadio(_rx_mode_failures >= 3);
|
|
}
|
|
|
|
uint32_t RadioLibWrapper::carrierWaveRemainingMillis() const {
|
|
if (!_cw_active || _cw_stopping) return 0;
|
|
if (_morse_owned) return morseTxRemainingMillis();
|
|
#if MESH_ENABLE_MORSE_RX
|
|
if (_morse_rx_owned) return morseRxRemainingMillis();
|
|
#endif
|
|
const int32_t remaining = static_cast<int32_t>(_cw_until - millis());
|
|
return remaining > 0 ? static_cast<uint32_t>(remaining) : 0;
|
|
}
|
|
|
|
mesh::RadioParamApplyResult RadioLibWrapper::setCarrierWave(uint8_t profile, uint32_t duration_ms) {
|
|
using Result = mesh::RadioParamApplyResult;
|
|
// The shared emergency stop also covers chips exposing Morse without the
|
|
// older profile-CW CLI capability.
|
|
if (!duration_ms && (_morse_owned
|
|
#if MESH_ENABLE_MORSE_RX
|
|
|| _morse_rx_owned
|
|
#endif
|
|
)) return stopCarrierWave() ? Result::APPLIED : Result::FAILED;
|
|
if (!supportsCarrierWave()) return Result::FAILED;
|
|
if (!duration_ms) return !_cw_active || stopCarrierWave() ? Result::APPLIED : Result::FAILED;
|
|
if (profile > 1 || duration_ms > CarrierWaveMaxMillis || !_params_valid
|
|
|| !_profiles.canTransmit(profile)) return Result::FAILED;
|
|
if (_cw_active) {
|
|
if (_morse_owned
|
|
#if MESH_ENABLE_MORSE_RX
|
|
|| _morse_rx_owned
|
|
#endif
|
|
|| _cw_stopping || profile != _cw_profile
|
|
|| _cw_generation != _profiles.generation[profile]) return Result::BUSY;
|
|
_cw_until = static_cast<uint32_t>(millis()) + duration_ms;
|
|
return Result::APPLIED;
|
|
}
|
|
|
|
// Own an idle radio before changing profiles or keying the external FEM.
|
|
// This also performs the SX1262 duty-cycle RTC cleanup used by packet TX.
|
|
const uint8_t resume = beginReconfigure();
|
|
if (resume > 1) return Result::BUSY;
|
|
_cw_restore_profile = _active_profile;
|
|
if (_radio->standby() != RADIOLIB_ERR_NONE
|
|
|| _radio->clearIrqFlags(UINT32_MAX) != RADIOLIB_ERR_NONE
|
|
|| tuneProfile(profile) != Result::APPLIED) {
|
|
startRecv();
|
|
return Result::FAILED;
|
|
}
|
|
_radio->clearPacketReceivedAction();
|
|
state = STATE_IDLE;
|
|
_rx_ps_armed = false;
|
|
_rx_hold_continuous = false;
|
|
_nf_calib_active = false;
|
|
_wd_observe_until = 0;
|
|
_cw_profile = profile;
|
|
_cw_generation = _profiles.generation[profile];
|
|
_morse_owned = false;
|
|
_cw_active = true;
|
|
_cw_stopping = false;
|
|
_board->setRadioTestActive(true); // service the deadline even without USB
|
|
_board->onBeforeTransmit();
|
|
_cw_board_tx = true;
|
|
if (enterCarrierWave() != RADIOLIB_ERR_NONE) {
|
|
stopCarrierWave(); // a failed SPI result does not prove TX stayed off
|
|
return Result::FAILED;
|
|
}
|
|
_cw_until = static_cast<uint32_t>(millis()) + duration_ms;
|
|
return Result::APPLIED;
|
|
}
|
|
|
|
bool RadioLibWrapper::supportsMorseTx() const {
|
|
return supportsCarrierWave();
|
|
}
|
|
|
|
mesh::MorseTxResult RadioLibWrapper::startMorseTx(float frequency_mhz,
|
|
uint8_t wpm, const char* text) {
|
|
using Result = mesh::MorseTxResult;
|
|
if (!supportsMorseTx()) return Result::Unsupported;
|
|
if (_cw_active) return Result::Busy;
|
|
const Result valid_text = mesh::MorseTx::validate(text, wpm);
|
|
if (valid_text != Result::Started) return valid_text;
|
|
if (!_params_valid || !isfinite(frequency_mhz)) return Result::InvalidFrequency;
|
|
// Only the carrier frequency matters here: existing LoRa SF/BW/protocol
|
|
// constraints must not accidentally limit an unmodulated transmission.
|
|
if (!validateMorseFrequency(frequency_mhz)) return Result::InvalidFrequency;
|
|
for (uint8_t profile = 0; profile < 2; ++profile) {
|
|
const auto& p = _profiles.params(profile);
|
|
if (mesh::morseFrequencyOverlaps(frequency_mhz, p.freq, p.bw)) return Result::Overlap;
|
|
}
|
|
const uint8_t resume = beginReconfigure();
|
|
if (resume > 1) return Result::Busy;
|
|
_cw_restore_profile = _active_profile;
|
|
if (_radio->standby() != RADIOLIB_ERR_NONE
|
|
|| _radio->clearIrqFlags(UINT32_MAX) != RADIOLIB_ERR_NONE) {
|
|
endReconfigure(resume);
|
|
return Result::Failed;
|
|
}
|
|
|
|
// Publish ownership before the first hardware mutation; even a failed SPI
|
|
// command can have reached the chip, requiring a confirmed stop/restore.
|
|
_radio->clearPacketReceivedAction();
|
|
_cw_active = _morse_owned = true;
|
|
_cw_stopping = false;
|
|
_cw_profile = _active_profile;
|
|
_morse_generation[0] = _profiles.generation[0];
|
|
_morse_generation[1] = _profiles.generation[1];
|
|
_morse_frequency = frequency_mhz;
|
|
_morse_wpm = wpm;
|
|
_rx_ps_armed = false;
|
|
_rx_hold_continuous = false;
|
|
_nf_calib_active = false;
|
|
_wd_observe_until = 0;
|
|
state = STATE_IDLE;
|
|
_board->setRadioTestActive(true);
|
|
if (prepareMorseCarrier(frequency_mhz) != RADIOLIB_ERR_NONE) {
|
|
stopCarrierWave();
|
|
return Result::Failed;
|
|
}
|
|
_board->onBeforeTransmit();
|
|
_cw_board_tx = true;
|
|
if (enterMorseCarrier() != RADIOLIB_ERR_NONE) {
|
|
stopCarrierWave();
|
|
return Result::Failed;
|
|
}
|
|
// Start timing when the hardware command has finished, not before the
|
|
// one-time oscillator/modem setup. Validation above guarantees success.
|
|
_morse.start(text, wpm, static_cast<uint32_t>(millis()));
|
|
return Result::Started;
|
|
}
|
|
|
|
mesh::MorseTxResult RadioLibWrapper::stopMorseTx() {
|
|
if (!supportsMorseTx()) return mesh::MorseTxResult::Unsupported;
|
|
if (!_morse_owned) return mesh::MorseTxResult::Stopped;
|
|
return stopCarrierWave() ? mesh::MorseTxResult::Stopped : mesh::MorseTxResult::Failed;
|
|
}
|
|
|
|
bool RadioLibWrapper::serviceMorseTx() {
|
|
if (!_morse_owned || !_cw_active) return false;
|
|
const uint32_t now = millis();
|
|
if (_cw_stopping) {
|
|
if (static_cast<int32_t>(now - _cw_retry_at) >= 0) stopCarrierWave();
|
|
return true;
|
|
}
|
|
if (_morse_generation[0] != _profiles.generation[0]
|
|
|| _morse_generation[1] != _profiles.generation[1]) {
|
|
stopCarrierWave();
|
|
return true;
|
|
}
|
|
// The public profile model is also used by board-specific integrations.
|
|
// Fail closed if one changes a tuple directly without bumping generation.
|
|
for (uint8_t profile = 0; profile < 2; ++profile) {
|
|
const auto& p = _profiles.params(profile);
|
|
if (mesh::morseFrequencyOverlaps(_morse_frequency, p.freq, p.bw)) {
|
|
stopCarrierWave();
|
|
return true;
|
|
}
|
|
}
|
|
const auto edge = _morse.advance(now);
|
|
if (edge == mesh::MorseTx::Edge::Complete || edge == mesh::MorseTx::Edge::Expired) {
|
|
stopCarrierWave();
|
|
} else if (edge == mesh::MorseTx::Edge::KeyUp) {
|
|
const int16_t status = leaveMorseCarrier();
|
|
if (_cw_board_tx) { _board->onAfterTransmit(); _cw_board_tx = false; }
|
|
if (status != RADIOLIB_ERR_NONE) stopCarrierWave();
|
|
else _morse.edgeApplied(static_cast<uint32_t>(millis()));
|
|
} else if (edge == mesh::MorseTx::Edge::KeyDown) {
|
|
_board->onBeforeTransmit();
|
|
_cw_board_tx = true;
|
|
if (enterMorseCarrier() != RADIOLIB_ERR_NONE) stopCarrierWave();
|
|
else _morse.edgeApplied(static_cast<uint32_t>(millis()));
|
|
}
|
|
return true;
|
|
}
|
|
|
|
#if MESH_ENABLE_MORSE_RX
|
|
bool RadioLibWrapper::canAllocateMorseReceiver() const {
|
|
// This is a real, opt-in runtime reservation, never hidden in the static
|
|
// RAM baseline or silently borrowed from an independently running OTA.
|
|
size_t allocation = _morse_rx ? 0U : sizeof(mesh::MorseRx);
|
|
#if defined(ESP32_PLATFORM)
|
|
size_t largest_allocation = allocation;
|
|
#endif
|
|
#if defined(MESH_MORSE_HIL) && MESH_MORSE_HIL
|
|
if (!_morse_trace) {
|
|
allocation += sizeof(mesh::MorseRssiTrace);
|
|
#if defined(ESP32_PLATFORM)
|
|
if (sizeof(mesh::MorseRssiTrace) > largest_allocation)
|
|
largest_allocation = sizeof(mesh::MorseRssiTrace);
|
|
#endif
|
|
}
|
|
#endif
|
|
// A retained transcript/trace is reused in place after preparation succeeds.
|
|
// Require only allocations still missing, while keeping the same reserve.
|
|
const size_t required = allocation + 4096U;
|
|
#if defined(ESP32_PLATFORM)
|
|
return ESP.getFreeHeap() >= required
|
|
&& (!largest_allocation
|
|
|| heap_caps_get_largest_free_block(MALLOC_CAP_8BIT) >= largest_allocation);
|
|
#elif defined(NRF52_PLATFORM)
|
|
const int available = dbgHeapFree();
|
|
return available > 0 && static_cast<size_t>(available) >= required;
|
|
#elif defined(RP2040_PLATFORM)
|
|
const int available = rp2040.getFreeHeap();
|
|
return available > 0 && static_cast<size_t>(available) >= required;
|
|
#elif defined(STM32_PLATFORM)
|
|
uint8_t stack_marker;
|
|
const caddr_t heap_end = _sbrk(0);
|
|
if (heap_end == (caddr_t)-1) return false;
|
|
const uintptr_t stack_address = reinterpret_cast<uintptr_t>(&stack_marker);
|
|
const uintptr_t heap_address = reinterpret_cast<uintptr_t>(heap_end);
|
|
return stack_address > heap_address && stack_address - heap_address >= required;
|
|
#else
|
|
return false; // an unmeasured allocator must not consume the safety reserve
|
|
#endif
|
|
}
|
|
|
|
mesh::MorseRxResult RadioLibWrapper::startMorseRx(float frequency_mhz,
|
|
uint8_t wpm, uint32_t duration_ms) {
|
|
using Result = mesh::MorseRxResult;
|
|
if (!supportsMorseRx()) return Result::Unsupported;
|
|
if (_cw_active) return Result::Busy;
|
|
const Result valid = mesh::MorseRx::validate(wpm, duration_ms);
|
|
if (valid != Result::Started) return valid;
|
|
if (!_params_valid || !isfinite(frequency_mhz) || !validateMorseFrequency(frequency_mhz))
|
|
return Result::InvalidFrequency;
|
|
// Passive reception cannot interfere with either packet profile. Listening
|
|
// on its centre is useful; only a transmitting Morse carrier needs spacing.
|
|
if (!canAllocateMorseReceiver()) return Result::Failed;
|
|
mesh::MorseRx* receiver = _morse_rx;
|
|
const bool allocated = receiver == nullptr;
|
|
if (allocated) receiver = new (std::nothrow) mesh::MorseRx;
|
|
if (!receiver) return Result::Failed;
|
|
#if defined(MESH_MORSE_HIL) && MESH_MORSE_HIL
|
|
mesh::MorseRssiTrace* trace = _morse_trace;
|
|
const bool trace_allocated = trace == nullptr;
|
|
if (trace_allocated) trace = new (std::nothrow) mesh::MorseRssiTrace;
|
|
if (!trace) { if (allocated) delete receiver; return Result::Failed; }
|
|
#endif
|
|
// Allocation/admission occurs before any hardware change. Keep a previous
|
|
// transcript untouched until the replacement receiver is proven running.
|
|
const uint8_t resume = beginReconfigure();
|
|
if (resume > 1) {
|
|
if (allocated) delete receiver;
|
|
#if defined(MESH_MORSE_HIL) && MESH_MORSE_HIL
|
|
if (trace_allocated) delete trace;
|
|
#endif
|
|
return Result::Busy;
|
|
}
|
|
_cw_restore_profile = _active_profile;
|
|
if (_radio->standby() != RADIOLIB_ERR_NONE
|
|
|| _radio->clearIrqFlags(UINT32_MAX) != RADIOLIB_ERR_NONE) {
|
|
if (allocated) delete receiver;
|
|
#if defined(MESH_MORSE_HIL) && MESH_MORSE_HIL
|
|
if (trace_allocated) delete trace;
|
|
#endif
|
|
endReconfigure(resume);
|
|
return Result::Failed;
|
|
}
|
|
_radio->clearPacketReceivedAction();
|
|
_cw_active = _morse_rx_owned = true;
|
|
_morse_owned = _cw_stopping = false;
|
|
_cw_profile = _active_profile;
|
|
_morse_generation[0] = _profiles.generation[0];
|
|
_morse_generation[1] = _profiles.generation[1];
|
|
_rx_ps_armed = _rx_hold_continuous = _nf_calib_active = false;
|
|
_wd_observe_until = 0;
|
|
_morse_rx_read_errors = 0;
|
|
state = STATE_IDLE;
|
|
_board->setRadioTestActive(true);
|
|
if (prepareMorseReceiver(frequency_mhz) != RADIOLIB_ERR_NONE
|
|
|| (_rx_boosted_gain_valid && !applyRxBoostedGainMode(_cur_rx_boosted_gain))
|
|
|| startMorseReceiver() != RADIOLIB_ERR_NONE) {
|
|
if (allocated) delete receiver;
|
|
#if defined(MESH_MORSE_HIL) && MESH_MORSE_HIL
|
|
if (trace_allocated) delete trace;
|
|
#endif
|
|
stopCarrierWave();
|
|
return Result::Failed;
|
|
}
|
|
const float initial_rssi = readMorseRssi();
|
|
if (!isfinite(initial_rssi) || initial_rssi < -180.0f || initial_rssi > 20.0f) {
|
|
if (allocated) delete receiver;
|
|
#if defined(MESH_MORSE_HIL) && MESH_MORSE_HIL
|
|
if (trace_allocated) delete trace;
|
|
#endif
|
|
stopCarrierWave();
|
|
return Result::Failed;
|
|
}
|
|
const uint32_t now = millis();
|
|
#if defined(MESH_MORSE_HIL) && MESH_MORSE_HIL
|
|
receiver->setTrace(trace);
|
|
_morse_trace = trace;
|
|
#endif
|
|
receiver->start(wpm, duration_ms, now);
|
|
receiver->sample(initial_rssi, now);
|
|
_morse_rx = receiver;
|
|
_morse_rx_frequency = frequency_mhz;
|
|
_morse_rx_next_sample = now + mesh::MorseRx::SampleIntervalMillis;
|
|
++_morse_capture_generation;
|
|
return Result::Started;
|
|
}
|
|
|
|
mesh::MorseRxResult RadioLibWrapper::stopMorseRx() {
|
|
if (!supportsMorseRx()) return mesh::MorseRxResult::Unsupported;
|
|
if (!_morse_rx_owned) return mesh::MorseRxResult::Stopped;
|
|
return stopCarrierWave() ? mesh::MorseRxResult::Stopped : mesh::MorseRxResult::Failed;
|
|
}
|
|
|
|
size_t RadioLibWrapper::readMorseCapture(size_t offset, char* out, size_t capacity) const {
|
|
if (_morse_rx) return _morse_rx->read(offset, out, capacity);
|
|
if (out && capacity) out[0] = 0;
|
|
return 0;
|
|
}
|
|
|
|
void RadioLibWrapper::clearMorseCapture() {
|
|
if (isMorseRxActive()) return;
|
|
delete _morse_rx;
|
|
_morse_rx = nullptr;
|
|
#if defined(MESH_MORSE_HIL) && MESH_MORSE_HIL
|
|
delete _morse_trace;
|
|
_morse_trace = nullptr;
|
|
#endif
|
|
++_morse_capture_generation;
|
|
}
|
|
#endif
|
|
|
|
bool RadioLibWrapper::serviceMorseRx() {
|
|
#if !MESH_ENABLE_MORSE_RX
|
|
return false;
|
|
#else
|
|
if (!_morse_rx_owned || !_cw_active) return false;
|
|
const uint32_t now = millis();
|
|
if (_cw_stopping) {
|
|
if (static_cast<int32_t>(now - _cw_retry_at) >= 0) stopCarrierWave();
|
|
return true;
|
|
}
|
|
if (!_morse_rx || !_morse_rx->service(now)
|
|
|| _morse_generation[0] != _profiles.generation[0]
|
|
|| _morse_generation[1] != _profiles.generation[1]) {
|
|
stopCarrierWave();
|
|
return true;
|
|
}
|
|
if (static_cast<int32_t>(now - _morse_rx_next_sample) >= 0) {
|
|
const float rssi = readMorseRssi();
|
|
const uint32_t sampled_at = millis();
|
|
_morse_rx_next_sample = sampled_at + mesh::MorseRx::SampleIntervalMillis;
|
|
if (!isfinite(rssi) || rssi < -180.0f || rssi > 20.0f) {
|
|
if (++_morse_rx_read_errors >= 8) stopCarrierWave();
|
|
} else {
|
|
_morse_rx_read_errors = 0;
|
|
_morse_rx->sample(rssi, sampled_at);
|
|
if (!_morse_rx->active()) stopCarrierWave();
|
|
}
|
|
}
|
|
return true;
|
|
#endif
|
|
}
|
|
|
|
bool RadioLibWrapper::stopCarrierWave() {
|
|
_morse.stop();
|
|
#if MESH_ENABLE_MORSE_RX
|
|
if (_morse_rx_owned && _morse_rx) _morse_rx->stop(static_cast<uint32_t>(millis()));
|
|
#endif
|
|
_cw_stopping = true;
|
|
// Deassert external TX even if SPI fails. SX127x must also rebuild its LoRa
|
|
// modem after FSK direct mode before normal packet work can resume.
|
|
const int16_t status = _radio->finishTransmit();
|
|
// Some RadioLib finishTransmit() implementations return after a failed IRQ
|
|
// clear, before their standby command. Always attempt the RF-off command.
|
|
const int16_t standby_status = _radio->standby();
|
|
if (_cw_board_tx) { _board->onAfterTransmit(); _cw_board_tx = false; }
|
|
bool restored;
|
|
#if MESH_ENABLE_MORSE_RX
|
|
if (_morse_rx_fsk_mode) {
|
|
// applyParams only changes a LoRa tuple; it cannot rebuild a modem switched
|
|
// to GFSK. This includes failed partial preparation and cleanup retries.
|
|
restored = restoreAfterDeepInit();
|
|
if (restored) _morse_rx_fsk_mode = false;
|
|
} else {
|
|
#else
|
|
{
|
|
#endif
|
|
restored = status == RADIOLIB_ERR_NONE || standby_status == RADIOLIB_ERR_NONE
|
|
? restoreCarrierWaveModem() : restoreAfterDeepInit();
|
|
}
|
|
if (!restored) {
|
|
_cw_retry_at = static_cast<uint32_t>(millis()) + 100;
|
|
return false; // hold normal work until stopping the carrier is confirmed
|
|
}
|
|
if (!registerInterruptAction()) {
|
|
_cw_retry_at = static_cast<uint32_t>(millis()) + 100;
|
|
return false;
|
|
}
|
|
_cw_active = false;
|
|
_cw_stopping = false;
|
|
_rx_ps_armed = false;
|
|
state = STATE_IDLE;
|
|
_profile_refresh_required = true;
|
|
const uint8_t restore = _profiles.enabled() ? _cw_restore_profile : 0;
|
|
const bool tuned = tuneProfile(restore) == mesh::RadioParamApplyResult::APPLIED;
|
|
recalibrateNoiseFloor();
|
|
startRecv();
|
|
if (!isInRecvMode() && restoreAfterDeepInit()) startRecv();
|
|
if (!tuned || !isInRecvMode()) {
|
|
// A stopped carrier is not sufficient to hand ownership back if the
|
|
// configured packet modem/profile could not be restored. Keep the guard
|
|
// and watchdog wake veto until the bounded retry repairs reception.
|
|
_cw_active = _cw_stopping = true;
|
|
_cw_retry_at = static_cast<uint32_t>(millis()) + 100;
|
|
return false;
|
|
}
|
|
_morse_owned = false;
|
|
#if MESH_ENABLE_MORSE_RX
|
|
_morse_rx_owned = false;
|
|
#endif
|
|
_board->setRadioTestActive(false);
|
|
return true;
|
|
}
|
|
|
|
bool RadioLibWrapper::serviceCarrierWave() {
|
|
#if MESH_ENABLE_MORSE_RX
|
|
if (serviceMorseRx()) return true;
|
|
#endif
|
|
if (serviceMorseTx()) return true;
|
|
if (_cw_active) {
|
|
const uint32_t now = millis();
|
|
if ((_cw_stopping && static_cast<int32_t>(now - _cw_retry_at) >= 0)
|
|
|| (!_cw_stopping && (static_cast<int32_t>(now - _cw_until) >= 0
|
|
|| !_profiles.canTransmit(_cw_profile)
|
|
|| _cw_generation != _profiles.generation[_cw_profile]))) {
|
|
if (!stopCarrierWave()) MESH_DEBUG_PRINTLN("CW: stop/RX recovery failed");
|
|
}
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void RadioLibWrapper::loop() {
|
|
syncProfileClock(_profiles.enabled());
|
|
if (serviceCarrierWave()) return;
|
|
if (_profiles.enabled()) {
|
|
const unsigned long now = millis();
|
|
checkReceiveMode(static_cast<uint32_t>(now));
|
|
|
|
const bool restart_scan = _profile_scan_generation[0] != _profiles.generation[0]
|
|
|| _profile_scan_generation[1] != _profiles.generation[1];
|
|
if (!_profile_rxps_suspended || restart_scan) {
|
|
// Entering scan mode or changing a profile retunes before sampling. A
|
|
// sample from the previous physical tuple would be misleading.
|
|
serviceProfileScan();
|
|
return;
|
|
}
|
|
|
|
if (_nf_refresh_requested && _nf_calib_deadline == 0 && state == STATE_RX) {
|
|
_nf_calib_deadline = now + NF_CONTINUOUS_TIMEOUT_MS;
|
|
}
|
|
if (_nf_refresh_requested && _floor_estimator.complete()
|
|
&& _secondary_floor_estimator.complete()) {
|
|
if (_floor_estimator.publish(_noise_floor_centi_dbm, _noise_floor_valid)) {
|
|
_noise_floor_valid = true;
|
|
_noise_floor = (_noise_floor_centi_dbm - 50) / 100;
|
|
}
|
|
if (_secondary_floor_estimator.publish(_noise_floor_secondary_centi_dbm,
|
|
_noise_floor_secondary_valid)) {
|
|
_noise_floor_secondary_valid = true;
|
|
}
|
|
_nf_refresh_requested = false;
|
|
_nf_last_calib = now;
|
|
_nf_calib_deadline = 0;
|
|
MESH_DEBUG_PRINTLN("RadioLibWrapper: profile noise floors = %d, %d",
|
|
(int)_noise_floor,
|
|
(int)((_noise_floor_secondary_centi_dbm - 50) / 100));
|
|
} else if (_nf_refresh_requested && _nf_calib_deadline != 0
|
|
&& (long)(now - _nf_calib_deadline) >= 0) {
|
|
// Busy profile visits must not pin dual-profile scanning indefinitely.
|
|
_nf_refresh_requested = false;
|
|
_nf_last_calib = now;
|
|
_nf_calib_deadline = 0;
|
|
_floor_estimator.reset();
|
|
_secondary_floor_estimator.reset();
|
|
} else {
|
|
NoiseFloorEstimator& estimator = profileFloorEstimator(_active_profile);
|
|
if (_nf_refresh_requested && state == STATE_RX
|
|
&& !estimator.complete() && !_rx_ps_armed
|
|
&& estimator.ready(static_cast<uint32_t>(now))
|
|
&& !(_nf_sample_from != 0 && (long)(now - _nf_sample_from) < 0)
|
|
&& !isChipBusy() && !isPacketPendingOrReceiving()) {
|
|
// Preserve samples across visits, but never let one profile's RSSI
|
|
// contaminate the other profile's independent noise-floor estimate.
|
|
_nf_sample_from = now + NoiseFloorEstimator::SAMPLE_INTERVAL_MS;
|
|
if (readReceiveMode() == 0) {
|
|
estimator.reset(true);
|
|
} else if (!isPacketPendingOrReceiving()) {
|
|
estimator.add(getCurrentRSSI(), static_cast<uint32_t>(now));
|
|
}
|
|
}
|
|
}
|
|
// Sample before deciding whether to hop. serviceProfileScan() extends a
|
|
// short visit only when the active profile still needs a safe sample.
|
|
serviceProfileScan();
|
|
return;
|
|
}
|
|
serviceProfileScan();
|
|
if (_rx_ps_enabled && !_rx_ps_continuous_fallback) {
|
|
rxPsWatchdogCheck();
|
|
}
|
|
unsigned long now = millis();
|
|
checkReceiveMode(static_cast<uint32_t>(now));
|
|
if (_nf_calib_active || _nf_refresh_requested) {
|
|
noiseFloorCalibCheck(now);
|
|
}
|
|
if (_nf_refresh_requested
|
|
&& (!_rx_ps_enabled || _rx_ps_continuous_fallback)
|
|
&& _nf_calib_deadline == 0
|
|
&& state == STATE_RX) {
|
|
// Measure the awake-time bound from actual continuous RX, not from begin()
|
|
// or a request made while the radio is idle, transmitting, or starting up.
|
|
_nf_calib_deadline = now + NF_CONTINUOUS_TIMEOUT_MS;
|
|
}
|
|
if (_nf_refresh_requested && _floor_estimator.complete()) {
|
|
if (_floor_estimator.publish(_noise_floor_centi_dbm, _noise_floor_valid)) {
|
|
_noise_floor_valid = true;
|
|
// Retain the whole-dB API/wire format and the fractional display value.
|
|
_noise_floor = (_noise_floor_centi_dbm - 50) / 100;
|
|
}
|
|
_nf_refresh_requested = false;
|
|
_nf_last_calib = now;
|
|
_nf_calib_deadline = 0;
|
|
|
|
MESH_DEBUG_PRINTLN("RadioLibWrapper: noise_floor = %d", (int)_noise_floor);
|
|
|
|
if (_nf_calib_active) {
|
|
endNoiseFloorCalib(now); // complete block, including a held rise - back to duty cycle
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (_nf_refresh_requested
|
|
&& (!_rx_ps_enabled || _rx_ps_continuous_fallback)
|
|
&& _nf_calib_deadline != 0
|
|
&& (long)(now - _nf_calib_deadline) >= 0) {
|
|
// A continuously busy channel can reject every candidate sample. Do not
|
|
// keep the MCU awake indefinitely; retain the previous floor and let the
|
|
// next scheduled calibration request retry an invalid startup baseline.
|
|
_nf_refresh_requested = false;
|
|
_nf_last_calib = now;
|
|
_nf_calib_deadline = 0;
|
|
_floor_estimator.reset();
|
|
}
|
|
|
|
if (_nf_refresh_requested && state == STATE_RX
|
|
&& !_floor_estimator.complete()) {
|
|
// Noise floor is only sampled outside RX duty-cycle mode: continuously in
|
|
// plain RX (powersaving off), or inside an on-demand calibration window
|
|
// (powersaving on). Skip the first moments after entering RX or changing
|
|
// gain while the frontend/AGC settles (unsettled GetRssiInst reads
|
|
// ~-127 dBm garbage).
|
|
if (!_rx_ps_armed
|
|
&& _floor_estimator.ready(static_cast<uint32_t>(now))
|
|
&& !(_nf_sample_from != 0 && (long)(now - _nf_sample_from) < 0)
|
|
&& !isChipBusy() && !isPacketPendingOrReceiving()) {
|
|
// Silent RX loss can leave software in STATE_RX while standby RSSI is
|
|
// meaningless. Reject that observation before it can lower the floor.
|
|
// Space rejected attempts too; an empty block must not hammer SPI.
|
|
_nf_sample_from = now + NoiseFloorEstimator::SAMPLE_INTERVAL_MS;
|
|
if (readReceiveMode() == 0) {
|
|
_floor_estimator.reset(true);
|
|
return;
|
|
}
|
|
// Admission is independent of the old floor, allowing upward recovery.
|
|
// A mode probe is unavailable on some radio families; keep their existing
|
|
// RSSI path. Preserve a packet IRQ arriving during the status transaction.
|
|
// The estimator enforces 50 ms spacing and rejects invalid radio readings.
|
|
if (!isPacketPendingOrReceiving()) {
|
|
_floor_estimator.add(getCurrentRSSI(), static_cast<uint32_t>(now));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void RadioLibWrapper::startRecv() {
|
|
if (_cw_active) return;
|
|
int err = startReceiveMode();
|
|
if (err == RADIOLIB_ERR_NONE) {
|
|
// A very short frame may complete while startReceiveMode() returns.
|
|
_profile_visit_stamp = profileTimestamp(_profiles.enabled());
|
|
// Retain that RX interrupt instead of overwriting it with software state.
|
|
state = STATE_RX;
|
|
// RSSI is unsettled after every RX entry, including CAD/TX completion.
|
|
// Keep the partial block, but wait for the frontend before its next sample.
|
|
_nf_sample_from = millis() + NF_CALIB_SETTLE_MS;
|
|
_startrx_fails = 0;
|
|
if (_rx_ps_armed) {
|
|
// (re)base the duty-cycle watchdog on the freshly armed cycle
|
|
_wd_last_busy = isChipBusy();
|
|
_wd_last_transition = millis();
|
|
// Longest legitimate silence on the BUSY pin: one full cycle, plus the
|
|
// extended RX after a (possibly false) preamble detect (2*rx + sleep),
|
|
// plus a worst-case packet airtime, plus margin for TCXO/transitions.
|
|
// Floored at 60s so a light-sleeping MCU (ESP32 wakes every ~30s) opens
|
|
// an observation window every couple of wakeups instead of on each one.
|
|
uint32_t rx_ms = _rx_ps_rx_us / 1000, sleep_ms = _rx_ps_sleep_us / 1000;
|
|
_wd_stuck_thresh = (rx_ms + sleep_ms) + 2 * (2 * rx_ms + sleep_ms)
|
|
+ getEstAirtimeFor(MAX_TRANS_UNIT) + 1000;
|
|
if (_wd_stuck_thresh < 60000) _wd_stuck_thresh = 60000;
|
|
// active observation window must cover one full duty cycle
|
|
_wd_observe_ms = rx_ms + sleep_ms + 50;
|
|
if (_wd_observe_ms > 1500) _wd_observe_ms = 1500;
|
|
}
|
|
} else {
|
|
if (_startrx_fails < 255) _startrx_fails++;
|
|
MESH_DEBUG_PRINTLN("RadioLibWrapper: error: startReceiveMode(%d)", err);
|
|
}
|
|
}
|
|
|
|
int RadioLibWrapper::startReceiveMode() {
|
|
return _radio->startReceive();
|
|
}
|
|
|
|
void RadioLibWrapper::stopReceiveDutyCycle() {
|
|
// The duty-cycle sequencer only stops on RxDone or an explicit standby;
|
|
// issuing other mode commands while it runs leads to undefined behaviour.
|
|
_radio->standby();
|
|
_rx_ps_armed = false;
|
|
}
|
|
|
|
bool RadioLibWrapper::isPacketReady() {
|
|
// In duty-cycle RX the DIO1 interrupt also fires for RX timeout (false
|
|
// preamble detect) and header errors. GetRxBufferStatus still reports the
|
|
// *previous* packet's length then, so reading the buffer would re-deliver
|
|
// stale bytes as a ghost packet. Only read when the radio reports RxDone.
|
|
// An unsupported probe retains the legacy event-only behavior.
|
|
const int16_t ready = _radio->checkIrq(RADIOLIB_IRQ_RX_DONE);
|
|
if (ready <= 0 && ready != RADIOLIB_ERR_UNSUPPORTED) {
|
|
// DIO can remain high after a transient SPI error, so no second edge will
|
|
// wake us. Retry the probe without treating the error as a valid packet.
|
|
_loop_event_pending = ++_irq_probe_failures < 3;
|
|
if (!_loop_event_pending) _irq_probe_failures = 0;
|
|
return false;
|
|
}
|
|
_irq_probe_failures = 0;
|
|
return ready > 0 || ready == RADIOLIB_ERR_UNSUPPORTED;
|
|
}
|
|
|
|
bool RadioLibWrapper::isInRecvMode() const {
|
|
return state == STATE_RX;
|
|
}
|
|
|
|
// RX PowerSaving
|
|
bool RadioLibWrapper::setRxPowerSaving(bool enabled, uint32_t rx_us, uint32_t sleep_us) {
|
|
if (_cw_active) return false;
|
|
if (_profile_rxps_suspended) {
|
|
_profile_saved_rxps = enabled;
|
|
_rx_ps_rx_us = rx_us;
|
|
_rx_ps_sleep_us = sleep_us;
|
|
return !enabled || supportsRxPowerSaving();
|
|
}
|
|
if (enabled && !supportsRxPowerSaving()) {
|
|
return false;
|
|
}
|
|
|
|
uint8_t resume_rx = beginReconfigure();
|
|
if (resume_rx > 1) return false;
|
|
|
|
_rx_ps_enabled = enabled;
|
|
_rx_ps_rx_us = rx_us;
|
|
_rx_ps_sleep_us = sleep_us;
|
|
_rx_ps_continuous_fallback = enabled
|
|
&& rxPowerSavingUsesContinuousFallback(rx_us, sleep_us);
|
|
endReconfigure(resume_rx);
|
|
return true;
|
|
}
|
|
|
|
int RadioLibWrapper::recvRaw(uint8_t* bytes, int sz) {
|
|
if (_cw_active) return 0;
|
|
int len = 0;
|
|
#if defined(USE_LR2021)
|
|
bool receiver_stopped = false;
|
|
#endif
|
|
if (claimRadioInterrupt()) {
|
|
last_radio_interrupt_millis = millis(); // ISR fired -> radio hardware is alive
|
|
if (isPacketReady()) {
|
|
#if defined(USE_LR2021)
|
|
// The LR2021 base reader clears FIFO/IRQs while otherwise staying in
|
|
// continuous RX. Freeze reception before taking length/status/FIFO
|
|
// snapshots so a new packet cannot be cleared halfway through the read.
|
|
if (_radio->standby() != RADIOLIB_ERR_NONE) {
|
|
n_recv_errors++;
|
|
state = STATE_IDLE;
|
|
return 0;
|
|
}
|
|
receiver_stopped = true;
|
|
#endif
|
|
if (_rx_ps_armed) {
|
|
// RxDone stops the active receive window, but the duty-cycle RTC can
|
|
// still be running. Stop it before reading and re-arming another mode.
|
|
stopReceiveDutyCycle();
|
|
}
|
|
len = _radio->getPacketLength();
|
|
if (len > 0) {
|
|
if (len > sz) { len = sz; }
|
|
// Cache packet status before readData() and before any new receive is
|
|
// started. Both operations may replace the radio's packet metadata.
|
|
_last_snr = _radio->getSNR();
|
|
_last_rssi = _radio->getRSSI();
|
|
int err = _radio->readData(bytes, len);
|
|
if (err != RADIOLIB_ERR_NONE) {
|
|
MESH_DEBUG_PRINTLN("RadioLibWrapper: error: readData(%d)", err);
|
|
len = 0;
|
|
n_recv_errors++;
|
|
} else {
|
|
// Serial.print(" readData() -> "); Serial.println(len);
|
|
n_recv++;
|
|
last_recv_millis = millis();
|
|
}
|
|
}
|
|
}
|
|
// Retry a transient IRQ-status probe before rearming/clearing hardware.
|
|
if (_loop_event_pending) return 0;
|
|
#if defined(USE_LR2021)
|
|
// An early FIFO/SPI failure must not leave RX_DONE asserted. Standby also
|
|
// covers spurious events for which no packet was read. No new hardware RX
|
|
// event can arrive during this acknowledgement; rearm happens afterwards.
|
|
if ((!receiver_stopped && _radio->standby() != RADIOLIB_ERR_NONE)
|
|
|| static_cast<LR2021*>(_radio)->clearRxFifo() != RADIOLIB_ERR_NONE
|
|
|| _radio->clearIrqFlags(RADIOLIB_LR2021_IRQ_RX_DONE) != RADIOLIB_ERR_NONE) {
|
|
n_recv_errors++;
|
|
state = STATE_IDLE;
|
|
return 0;
|
|
}
|
|
#endif
|
|
state = STATE_IDLE; // need another startReceive()
|
|
}
|
|
|
|
if (len > 0 && _rx_ps_enabled && !_rx_ps_continuous_fallback) {
|
|
// Dispatcher still needs the just-cached RSSI/SNR. Keep the receiver in
|
|
// ordinary continuous mode until it has parsed and scored this packet,
|
|
// then onReceiveProcessed() restores the duty cycle.
|
|
_rx_hold_continuous = true;
|
|
int err = _radio->startReceive();
|
|
if (err == RADIOLIB_ERR_NONE) {
|
|
state = STATE_RX;
|
|
if (_nf_calib_active) {
|
|
_nf_sample_from = millis() + NF_CALIB_SETTLE_MS;
|
|
}
|
|
} else {
|
|
MESH_DEBUG_PRINTLN("RadioLibWrapper: error: startReceive after packet (%d)", err);
|
|
}
|
|
return len;
|
|
}
|
|
|
|
if (state != STATE_RX) {
|
|
startRecv();
|
|
}
|
|
return len;
|
|
}
|
|
|
|
void RadioLibWrapper::finishReceiveProcessing() {
|
|
if (!_rx_hold_continuous) return;
|
|
|
|
if (state == STATE_TX_WAIT) {
|
|
_rx_hold_continuous = false;
|
|
return;
|
|
}
|
|
// A second packet may have completed while Dispatcher handled the first.
|
|
// Leave continuous RX intact until recvRaw() consumes that pending packet.
|
|
if (hasPendingRadioInterrupt() || isReceivingPacket()) {
|
|
return;
|
|
}
|
|
|
|
_rx_hold_continuous = false;
|
|
if (!_rx_ps_enabled || _rx_ps_continuous_fallback || _nf_calib_active) return;
|
|
|
|
state = STATE_IDLE;
|
|
startRecv();
|
|
}
|
|
|
|
uint32_t RadioLibWrapper::getEstAirtimeFor(int len_bytes) {
|
|
const uint32_t airtime_us =
|
|
static_cast<uint32_t>(_radio->getTimeOnAir(len_bytes));
|
|
if (mesh::isEncodedRadioLibAirtimeError(airtime_us)) {
|
|
MESH_DEBUG_PRINTLN(
|
|
"RadioLibWrapper: invalid time-on-air estimate (0x%08lX)",
|
|
(unsigned long)airtime_us);
|
|
return 0;
|
|
}
|
|
return airtime_us / 1000;
|
|
}
|
|
|
|
bool RadioLibWrapper::startSendRaw(const uint8_t* bytes, int len) {
|
|
if (_cw_active || hasPendingRadioInterrupt()) return false;
|
|
_rx_hold_continuous = false;
|
|
if (_rx_ps_armed) {
|
|
// stop the duty-cycle sequencer before SetTx, otherwise its next RTC
|
|
// event can fire mid-transmission and abort the TX
|
|
stopReceiveDutyCycle();
|
|
}
|
|
_board->onBeforeTransmit();
|
|
if (hasPendingRadioInterrupt()) {
|
|
_board->onAfterTransmit();
|
|
return false;
|
|
}
|
|
_irq_probe_failures = 0;
|
|
int err = _radio->startTransmit((uint8_t *) bytes, len);
|
|
if (err == RADIOLIB_ERR_NONE) {
|
|
state = STATE_TX_WAIT;
|
|
return true;
|
|
}
|
|
MESH_DEBUG_PRINTLN("RadioLibWrapper: error: startTransmit(%d)", err);
|
|
idle(); // trigger another startRecv()
|
|
_board->onAfterTransmit();
|
|
if (err == RADIOLIB_ERR_SPI_CMD_TIMEOUT) {
|
|
// A stuck BUSY line cannot be repaired with another SPI command. Radios
|
|
// with a reset pin recover immediately; others use their safest fallback.
|
|
recoverRadio(true);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool RadioLibWrapper::isSendComplete() {
|
|
if (state == STATE_TX_WAIT && claimRadioInterrupt()) {
|
|
const int16_t done = _radio->checkIrq(RADIOLIB_IRQ_TX_DONE);
|
|
if (done <= 0 && done != RADIOLIB_ERR_UNSUPPORTED) {
|
|
// getIrqFlags() may hide a failed SPI read as zero. Once DIO fired,
|
|
// keep probing until TX_DONE is observed or Dispatcher expires this TX.
|
|
_loop_event_pending = true;
|
|
return false;
|
|
}
|
|
_irq_probe_failures = 0;
|
|
state = STATE_IDLE;
|
|
n_sent++;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void RadioLibWrapper::onSendFinished() {
|
|
_radio->finishTransmit();
|
|
// Receive has not been rearmed yet: these are completion/probe events for
|
|
// the retired TX. They must not block the Dispatcher's timeout recovery.
|
|
claimRadioInterrupt();
|
|
_irq_probe_failures = 0;
|
|
_board->onAfterTransmit();
|
|
state = STATE_IDLE;
|
|
}
|
|
|
|
int16_t RadioLibWrapper::performChannelScan() {
|
|
return performChannelScanWithTimeout(cadScanTimeoutMillis());
|
|
}
|
|
|
|
int16_t RadioLibWrapper::performChannelScanWithTimeout(unsigned long timeout_ms) {
|
|
// RadioLib's blocking scanChannel() waits forever if the radio never raises
|
|
// its CAD-done IRQ. Keep CAD bounded so a missing IRQ cannot starve the main
|
|
// loop until the MCU watchdog resets the node.
|
|
int16_t result = _radio->startChannelScan();
|
|
if (result != RADIOLIB_ERR_NONE) return result;
|
|
|
|
const unsigned long started = millis();
|
|
unsigned long last_watchdog_service = started;
|
|
while (millis() - started < timeout_ms) {
|
|
result = _radio->getChannelScanResult();
|
|
if (result != RADIOLIB_ERR_UNKNOWN) return result;
|
|
|
|
const unsigned long now = millis();
|
|
if (now - last_watchdog_service >= 1000UL) {
|
|
_board->serviceWatchdog();
|
|
last_watchdog_service = now;
|
|
}
|
|
yield();
|
|
}
|
|
|
|
MESH_DEBUG_PRINTLN("RadioLibWrapper: CAD scan timed out after %lu ms", timeout_ms);
|
|
return RADIOLIB_ERR_RX_TIMEOUT;
|
|
}
|
|
|
|
bool RadioLibWrapper::isChannelActive() {
|
|
if (_cw_active) return true;
|
|
if (isPacketPendingOrReceiving() || state == STATE_TX_WAIT) return true;
|
|
// int.thresh: RSSI-based interference detection (relative to noise floor).
|
|
// In RX duty-cycle mode only checked while the chip is in a listen window
|
|
// (during the sleep window the frontend is off and the read would stall).
|
|
if (_threshold != 0 && !_profiles.enabled() && !(_rx_ps_armed && isChipBusy())
|
|
&& getCurrentRSSI() > _noise_floor + _threshold) return true;
|
|
|
|
// cad: hardware channel activity detection
|
|
if (_cad_enabled) {
|
|
if (_rx_ps_armed) {
|
|
// CAD cannot safely run on top of an active duty-cycle sequencer: its
|
|
// pending RTC event can force standby in the middle of the scan.
|
|
stopReceiveDutyCycle();
|
|
}
|
|
int16_t result = performChannelScan();
|
|
// CAD also publishes an IRQ event. Consume it before restarting RX so recvRaw() doesn't
|
|
// try to read a non-existent packet and count a spurious recv error.
|
|
claimRadioInterrupt();
|
|
state = STATE_IDLE;
|
|
startRecv();
|
|
if (result != RADIOLIB_CHANNEL_FREE || state != STATE_RX
|
|
|| isPacketPendingOrReceiving()) {
|
|
_board->n_cad_busy++;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool RadioLibWrapper::isReceivingPassive(int interference_margin_db) {
|
|
if (_cw_active) return true;
|
|
// RX duty-cycle radios hold BUSY high while asleep. Do not attempt an SPI
|
|
// IRQ/RSSI read until the next listen window. Treat the unknown channel as
|
|
// busy so the retry is deferred instead of transmitting blind; Dispatcher
|
|
// retains its bounded busy timeout as a last-resort escape.
|
|
if (isChipBusy()) return true;
|
|
if (isPacketPendingOrReceiving()) return true;
|
|
// Four-symbol visits are too short for the settled single-channel noise
|
|
// calibration. Keep retries in RX and use the preamble/header IRQs here.
|
|
if (_profiles.enabled()) return false;
|
|
|
|
requestPeriodicNoiseFloorRefresh();
|
|
// Until the startup baseline is ready, defer rather than compare against the
|
|
// zero-initialized floor and transmit blind. Dispatcher retains its bounded
|
|
// busy timeout if sampling cannot complete.
|
|
if (!_noise_floor_valid) return true;
|
|
|
|
// Use a fixed margin for retries even when the normal interference threshold
|
|
// is disabled. This is passive (RSSI only): unlike CAD it does not restart RX
|
|
// and cannot erase the forwarding echo that would cancel the retry.
|
|
return interference_margin_db > 0
|
|
&& getCurrentRSSI() - _noise_floor >= interference_margin_db;
|
|
}
|
|
|
|
uint8_t RadioLibWrapper::getRadioState() const {
|
|
return state;
|
|
}
|
|
|
|
float RadioLibWrapper::getLastRSSI() const {
|
|
return _last_rssi;
|
|
}
|
|
float RadioLibWrapper::getLastSNR() const {
|
|
return _last_snr;
|
|
}
|
|
|
|
float RadioLibWrapper::packetScoreInt(float snr, int sf, int packet_len) {
|
|
if (sf < 7) return 0.0f;
|
|
|
|
// Semtech's approximate threshold drops 2.5 dB for each step from SF7.
|
|
const float snr_threshold = -7.5f - (sf - 7) * 2.5f;
|
|
if (snr < snr_threshold) return 0.0f;
|
|
|
|
const float success_rate = (snr - snr_threshold) * 0.1f;
|
|
const float collision_penalty = 1.0f - packet_len / 256.0f;
|
|
const float score = success_rate * collision_penalty;
|
|
return score < 1.0f ? score : 1.0f;
|
|
}
|
|
|
|
PacketMillis RadioLibWrapper::calcMaxPacketMillis(uint8_t sf, float bw, uint8_t cr, uint16_t preambleSymbols) {
|
|
// based on RadioLib's calculateTimeOnAir()
|
|
uint32_t tsym_us = ((uint32_t)10000 << sf) / (bw * 10);
|
|
uint32_t sfCoeff1_x4 = (sf == 5 || sf == 6) ? 25 : 17; // 6.25 : 4.25, semtech magic numbers to account for sync word + sfd
|
|
|
|
// preamble + syncword + sfd + header
|
|
uint64_t preamble_us = (((uint64_t)(preambleSymbols + 8) * 4 + sfCoeff1_x4) * tsym_us) / 4;
|
|
// Allow four extra preamble symbols before giving up on header detection.
|
|
// This is an RX guard only; keep it out of the payload airtime subtraction.
|
|
const uint64_t preamble_guard_us = preamble_us + 4ULL * tsym_us;
|
|
|
|
// airtime for max packet at current radio settings
|
|
uint32_t total_us = _radio->getTimeOnAir(MAX_TRANS_UNIT);
|
|
// airtime for payload only (no preamble, header or SOF)
|
|
const uint32_t fallback_total_us = 4000000UL;
|
|
uint32_t payload_us = total_us > preamble_us
|
|
? total_us - preamble_us
|
|
: (fallback_total_us > preamble_us ? fallback_total_us - preamble_us
|
|
: fallback_total_us);
|
|
// rescale payload_us for max possible CR
|
|
if (cr >= 5 && cr < 8) { payload_us = (payload_us * 8) / cr; }
|
|
|
|
return PacketMillis {static_cast<uint32_t>((preamble_guard_us + 999) / 1000),
|
|
(payload_us + 999) / 1000};
|
|
}
|