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* added Radio::loop() virtual function

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* RadioLibWrapper:  new isChannelActive() based on current RSSI being above noise_floor + THRESHOLD
This commit is contained in:
Scott Powell 2025-05-24 21:24:44 +10:00
parent 2f8d9cf96a
commit f2243b78ae
10 changed files with 60 additions and 9 deletions
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36
src/helpers/RadioLibWrappers.cpp
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@ -8,6 +8,12 @@
#define STATE_TX_DONE 4
#define STATE_INT_READY 16
#ifndef INTERFERENCE_THRESHOLD_DB
#define INTERFERENCE_THRESHOLD_DB 14
#endif
#define NUM_NOISE_FLOOR_SAMPLES 64
static volatile uint8_t state = STATE_IDLE;
// this function is called when a complete packet
@ -28,6 +34,12 @@ void RadioLibWrapper::begin() {
if (_board->getStartupReason() == BD_STARTUP_RX_PACKET) { // received a LoRa packet (while in deep sleep)
setFlag(); // LoRa packet is already received
}
_noise_floor = -140;
// start average out some samples
_num_floor_samples = 0;
_floor_sample_sum = 0;
}
void RadioLibWrapper::idle() {
@ -35,6 +47,20 @@ void RadioLibWrapper::idle() {
state = STATE_IDLE; // need another startReceive()
}
void RadioLibWrapper::loop() {
if (state == STATE_RX && _num_floor_samples < NUM_NOISE_FLOOR_SAMPLES) {
if (!isReceivingPacket()) {
_num_floor_samples++;
_floor_sample_sum += getCurrentRSSI();
}
} else if (_floor_sample_sum != 0) {
_noise_floor = _floor_sample_sum / NUM_NOISE_FLOOR_SAMPLES;
_floor_sample_sum = 0;
MESH_DEBUG_PRINTLN("RadioLibWrapper: noise_floor = %d", (int)_noise_floor);
}
}
void RadioLibWrapper::startRecv() {
int err = _radio->startReceive();
if (err == RADIOLIB_ERR_NONE) {
@ -109,15 +135,7 @@ void RadioLibWrapper::onSendFinished() {
}
bool RadioLibWrapper::isChannelActive() {
idle(); // put sx126x into standby
// do some basic CAD (blocks for ~12780 micros (on SF 10)!)
bool activity = _radio->scanChannel() == RADIOLIB_LORA_DETECTED;
if (activity) {
startRecv();
} else {
idle();
}
return activity;
return getCurrentRSSI() > _noise_floor + INTERFERENCE_THRESHOLD_DB;
}
float RadioLibWrapper::getLastRSSI() const {