306 lines
11 KiB
C
306 lines
11 KiB
C
#include "subghz_frequency_analyzer_worker.h"
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#include <lib/drivers/cc1101.h>
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#include <furi.h>
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#define TAG "SubghzFrequencyAnalyzerWorker"
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static const uint8_t subghz_preset_ook_58khz[][2] = {
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{CC1101_MDMCFG4, 0b11110111}, // Rx BW filter is 58.035714kHz
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/* End */
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{0, 0},
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};
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static const uint8_t subghz_preset_ook_650khz[][2] = {
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{CC1101_MDMCFG4, 0b00010111}, // Rx BW filter is 650.000kHz
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/* End */
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{0, 0},
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};
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struct SubGhzFrequencyAnalyzerWorker {
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FuriThread* thread;
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volatile bool worker_running;
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uint8_t sample_hold_counter;
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FrequencyRSSI frequency_rssi_buf;
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SubGhzSetting* setting;
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float filVal;
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SubGhzFrequencyAnalyzerWorkerPairCallback pair_callback;
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void* context;
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};
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static void subghz_frequency_analyzer_worker_load_registers(const uint8_t data[][2]) {
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furi_hal_spi_acquire(&furi_hal_spi_bus_handle_subghz);
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size_t i = 0;
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while(data[i][0]) {
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cc1101_write_reg(&furi_hal_spi_bus_handle_subghz, data[i][0], data[i][1]);
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i++;
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}
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furi_hal_spi_release(&furi_hal_spi_bus_handle_subghz);
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}
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// running average with adaptive coefficient
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static uint32_t subghz_frequency_analyzer_worker_expRunningAverageAdaptive(
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SubGhzFrequencyAnalyzerWorker* instance,
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uint32_t newVal) {
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float k;
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float newValFloat = newVal;
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// the sharpness of the filter depends on the absolute value of the difference
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if(fabs(newValFloat - instance->filVal) > 500000)
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k = 0.9;
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else
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k = 0.03;
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instance->filVal += (newValFloat - instance->filVal) * k;
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return (uint32_t)instance->filVal;
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}
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/** Worker thread
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*
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* @param context
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* @return exit code
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*/
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static int32_t subghz_frequency_analyzer_worker_thread(void* context) {
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SubGhzFrequencyAnalyzerWorker* instance = context;
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FrequencyRSSI frequency_rssi = {
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.frequency_coarse = 0, .rssi_coarse = 0, .frequency_fine = 0, .rssi_fine = 0};
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float rssi = 0;
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uint32_t frequency = 0;
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float rssi_temp = -127.0f;
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uint32_t frequency_temp = 0;
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CC1101Status status;
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//Start CC1101
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furi_hal_subghz_reset();
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furi_hal_spi_acquire(&furi_hal_spi_bus_handle_subghz);
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cc1101_flush_rx(&furi_hal_spi_bus_handle_subghz);
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cc1101_flush_tx(&furi_hal_spi_bus_handle_subghz);
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cc1101_write_reg(&furi_hal_spi_bus_handle_subghz, CC1101_IOCFG0, CC1101IocfgHW);
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cc1101_write_reg(&furi_hal_spi_bus_handle_subghz, CC1101_MDMCFG3,
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0b01111111); // symbol rate
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cc1101_write_reg(
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&furi_hal_spi_bus_handle_subghz,
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CC1101_AGCCTRL2,
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0b00000111); // 00 - DVGA all; 000 - MAX LNA+LNA2; 111 - MAGN_TARGET 42 dB
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cc1101_write_reg(
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&furi_hal_spi_bus_handle_subghz,
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CC1101_AGCCTRL1,
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0b00001000); // 0; 0 - LNA 2 gain is decreased to minimum before decreasing LNA gain; 00 - Relative carrier sense threshold disabled; 1000 - Absolute carrier sense threshold disabled
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cc1101_write_reg(
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&furi_hal_spi_bus_handle_subghz,
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CC1101_AGCCTRL0,
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0b00110000); // 00 - No hysteresis, medium asymmetric dead zone, medium gain ; 11 - 64 samples agc; 00 - Normal AGC, 00 - 4dB boundary
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furi_hal_spi_release(&furi_hal_spi_bus_handle_subghz);
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furi_hal_subghz_set_path(FuriHalSubGhzPathIsolate);
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while(instance->worker_running) {
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furi_delay_ms(10);
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float rssi_min = 26.0f;
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float rssi_avg = 0;
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size_t rssi_avg_samples = 0;
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frequency_rssi.rssi_coarse = -127.0f;
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frequency_rssi.rssi_fine = -127.0f;
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furi_hal_subghz_idle();
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subghz_frequency_analyzer_worker_load_registers(subghz_preset_ook_650khz);
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// First stage: coarse scan
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for(size_t i = 0; i < subghz_setting_get_frequency_count(instance->setting); i++) {
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if(furi_hal_subghz_is_frequency_valid(
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subghz_setting_get_frequency(instance->setting, i))) {
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furi_hal_spi_acquire(&furi_hal_spi_bus_handle_subghz);
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cc1101_switch_to_idle(&furi_hal_spi_bus_handle_subghz);
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frequency = cc1101_set_frequency(
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&furi_hal_spi_bus_handle_subghz,
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subghz_setting_get_frequency(instance->setting, i));
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cc1101_calibrate(&furi_hal_spi_bus_handle_subghz);
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do {
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status = cc1101_get_status(&furi_hal_spi_bus_handle_subghz);
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} while(status.STATE != CC1101StateIDLE);
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cc1101_switch_to_rx(&furi_hal_spi_bus_handle_subghz);
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furi_hal_spi_release(&furi_hal_spi_bus_handle_subghz);
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furi_delay_ms(2);
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rssi = furi_hal_subghz_get_rssi();
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rssi_avg += rssi;
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rssi_avg_samples++;
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if(rssi < rssi_min) rssi_min = rssi;
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if(frequency_rssi.rssi_coarse < rssi) {
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frequency_rssi.rssi_coarse = rssi;
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frequency_rssi.frequency_coarse = frequency;
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}
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}
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}
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FURI_LOG_T(
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TAG,
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"RSSI: avg %f, max %f at %lu, min %f",
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(double)(rssi_avg / rssi_avg_samples),
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(double)frequency_rssi.rssi_coarse,
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frequency_rssi.frequency_coarse,
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(double)rssi_min);
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// Second stage: fine scan
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if(frequency_rssi.rssi_coarse > SUBGHZ_FREQUENCY_ANALYZER_THRESHOLD) {
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furi_hal_subghz_idle();
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subghz_frequency_analyzer_worker_load_registers(subghz_preset_ook_58khz);
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//for example -0.3 ... 433.92 ... +0.3 step 20KHz
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for(uint32_t i = frequency_rssi.frequency_coarse - 300000;
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i < frequency_rssi.frequency_coarse + 300000;
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i += 20000) {
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if(furi_hal_subghz_is_frequency_valid(i)) {
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furi_hal_spi_acquire(&furi_hal_spi_bus_handle_subghz);
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cc1101_switch_to_idle(&furi_hal_spi_bus_handle_subghz);
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frequency = cc1101_set_frequency(&furi_hal_spi_bus_handle_subghz, i);
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cc1101_calibrate(&furi_hal_spi_bus_handle_subghz);
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do {
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status = cc1101_get_status(&furi_hal_spi_bus_handle_subghz);
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} while(status.STATE != CC1101StateIDLE);
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cc1101_switch_to_rx(&furi_hal_spi_bus_handle_subghz);
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furi_hal_spi_release(&furi_hal_spi_bus_handle_subghz);
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furi_delay_ms(2);
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rssi = furi_hal_subghz_get_rssi();
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FURI_LOG_T(TAG, "#:%lu:%f", frequency, (double)rssi);
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if(frequency_rssi.rssi_fine < rssi) {
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frequency_rssi.rssi_fine = rssi;
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frequency_rssi.frequency_fine = frequency;
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}
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}
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}
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}
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// Deliver results fine
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if(frequency_rssi.rssi_fine > SUBGHZ_FREQUENCY_ANALYZER_THRESHOLD) {
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FURI_LOG_D(
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TAG, "=:%lu:%f", frequency_rssi.frequency_fine, (double)frequency_rssi.rssi_fine);
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instance->sample_hold_counter = 20;
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rssi_temp = (rssi_temp + frequency_rssi.rssi_fine) / 2;
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frequency_temp = frequency_rssi.frequency_fine;
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if(instance->filVal) {
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frequency_rssi.frequency_fine =
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subghz_frequency_analyzer_worker_expRunningAverageAdaptive(
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instance, frequency_rssi.frequency_fine);
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}
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// Deliver callback
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if(instance->pair_callback) {
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instance->pair_callback(
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instance->context, frequency_rssi.frequency_fine, rssi_temp, true);
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}
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} else if( // Deliver results coarse
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(frequency_rssi.rssi_coarse > SUBGHZ_FREQUENCY_ANALYZER_THRESHOLD) &&
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(instance->sample_hold_counter < 10)) {
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FURI_LOG_D(
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TAG,
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"~:%lu:%f",
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frequency_rssi.frequency_coarse,
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(double)frequency_rssi.rssi_coarse);
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instance->sample_hold_counter = 20;
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rssi_temp = (rssi_temp + frequency_rssi.rssi_coarse) / 2;
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frequency_temp = frequency_rssi.frequency_coarse;
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if(instance->filVal) {
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frequency_rssi.frequency_coarse =
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subghz_frequency_analyzer_worker_expRunningAverageAdaptive(
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instance, frequency_rssi.frequency_coarse);
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}
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// Deliver callback
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if(instance->pair_callback) {
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instance->pair_callback(
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instance->context, frequency_rssi.frequency_coarse, rssi_temp, true);
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}
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} else {
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if(instance->sample_hold_counter > 0) {
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instance->sample_hold_counter--;
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if(instance->sample_hold_counter == 15) {
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if(instance->pair_callback) {
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instance->pair_callback(
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instance->context, frequency_temp, rssi_temp, false);
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}
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}
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} else {
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instance->filVal = 0;
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rssi_temp = -127.0f;
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instance->pair_callback(instance->context, 0, 0, false);
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}
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}
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}
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//Stop CC1101
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furi_hal_subghz_idle();
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furi_hal_subghz_sleep();
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return 0;
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}
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SubGhzFrequencyAnalyzerWorker* subghz_frequency_analyzer_worker_alloc(void* context) {
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furi_assert(context);
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SubGhzFrequencyAnalyzerWorker* instance = malloc(sizeof(SubGhzFrequencyAnalyzerWorker));
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instance->thread = furi_thread_alloc_ex(
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"SubGhzFAWorker", 2048, subghz_frequency_analyzer_worker_thread, instance);
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SubGhz* subghz = context;
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instance->setting = subghz->setting;
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return instance;
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}
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void subghz_frequency_analyzer_worker_free(SubGhzFrequencyAnalyzerWorker* instance) {
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furi_assert(instance);
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furi_thread_free(instance->thread);
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free(instance);
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}
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void subghz_frequency_analyzer_worker_set_pair_callback(
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SubGhzFrequencyAnalyzerWorker* instance,
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SubGhzFrequencyAnalyzerWorkerPairCallback callback,
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void* context) {
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furi_assert(instance);
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furi_assert(context);
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instance->pair_callback = callback;
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instance->context = context;
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}
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void subghz_frequency_analyzer_worker_start(SubGhzFrequencyAnalyzerWorker* instance) {
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furi_assert(instance);
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furi_assert(!instance->worker_running);
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instance->worker_running = true;
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furi_thread_start(instance->thread);
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}
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void subghz_frequency_analyzer_worker_stop(SubGhzFrequencyAnalyzerWorker* instance) {
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furi_assert(instance);
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furi_assert(instance->worker_running);
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instance->worker_running = false;
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furi_thread_join(instance->thread);
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}
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bool subghz_frequency_analyzer_worker_is_running(SubGhzFrequencyAnalyzerWorker* instance) {
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furi_assert(instance);
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return instance->worker_running;
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}
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