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85 lines
2.5 KiB
C++
85 lines
2.5 KiB
C++
#ifndef LORASA_SCAN_H
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#define LORASA_SCAN_H
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#include <config.h>
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#include <cstdint>
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#include <event_types.h>
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#include <stdlib.h>
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#ifdef PRINT_DEBUG
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#define LOG(args...) Serial.printf(args...)
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#define LOG_IF(cond, args...) \
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if (cond) \
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LOG(args...)
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#elif !defined(LOG)
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#define LOG(args...)
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#define LOG_IF(cond, args...)
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#endif
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// Output Pixel Formula
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// 1 = rssi / 4, 2 = (rssi / 2) - 22 or 20
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constexpr int RSSI_OUTPUT_FORMULA = 2;
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// based on the formula for RSSI_OUTPUT_FORMULA == 2
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// -2 * (22 + RADIOLIB_SX126X_SPECTRAL_SCAN_RES_SIZE) < rssi =< -44
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// practice may require a better pair of thresholds
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constexpr float HI_RSSI_THRESHOLD = -44.0;
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constexpr float LO_RSSI_THRESHOLD = HI_RSSI_THRESHOLD - 66;
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// number of samples for RSSI method
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#ifndef SAMPLES_RSSI
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#define SAMPLES_RSSI 13 // 21 //
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#endif
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#ifdef USING_SX1280PA
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#define SAMPLES_RSSI 20
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#endif
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struct Scan
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{
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uint64_t epoch;
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float current_frequency;
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uint64_t fr_begin;
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uint64_t fr_end;
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uint64_t drone_detection_level;
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bool sound_on;
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bool led_flag;
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uint64_t detection_count;
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bool animated;
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float trigger_level;
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bool comms_initialized;
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Listener **eventListeners[(size_t)EventType::_MAX_EVENT_TYPE + 1];
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size_t listener_count[(size_t)EventType::_MAX_EVENT_TYPE + 1];
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Scan()
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: epoch(0), current_frequency(0), fr_begin(0), fr_end(0),
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drone_detection_level(0), sound_on(false), led_flag(false), detection_count(0),
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animated(false), trigger_level(0),
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listener_count{
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0,
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},
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comms_initialized(false) {};
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// rssiMethod gets the data similar to the scan method,
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// but uses getRSSI directly.
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uint16_t rssiMethod(float (*getRSSI)(void *), void *param, size_t samples,
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uint16_t *result, size_t res_size);
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// detect method analyses result, and produces filtered_result, marking
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// those values that represent a detection event.
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// It returns index that represents strongest signal at which a detection event
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// occurred.
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Event detect(uint16_t *result, bool *filtered_result, size_t result_size,
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int samples);
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size_t addEventListener(EventType t, Listener &l);
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size_t addEventListener(EventType t, void cb(void *, Event &), void *arg);
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void fireEvent(Event &e);
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};
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// Remove reading without neighbors
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#define FILTER_SPECTRUM_RESULTS true
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#endif
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