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#include "subghz_frequency_analyzer_worker.h"
#include <lib/drivers/cc1101_regs.h>
#include <furi.h>
#include "../subghz_i.h"
static const uint8_t subghz_preset_ook_58khz[][2] = {
{CC1101_FIFOTHR, 0x47}, // The only important bit is ADC_RETENTION, FIFO Tx=33 Rx=32
{CC1101_MDMCFG4, 0xF5}, // Rx BW filter is 58.035714kHz
{CC1101_TEST2, 0x81}, // FIFOTHR ADC_RETENTION=1 matched value
{CC1101_TEST1, 0x35}, // FIFOTHR ADC_RETENTION=1 matched value
/* End */
{0, 0},
};
static const uint8_t subghz_preset_ook_650khz[][2] = {
{CC1101_FIFOTHR, 0x07}, // The only important bit is ADC_RETENTION
{CC1101_MDMCFG4, 0x17}, // Rx BW filter is 650.000kHz
{CC1101_TEST2, 0x88},
{CC1101_TEST1, 0x31},
/* End */
{0, 0},
};
struct SubGhzFrequencyAnalyzerWorker {
FuriThread* thread;
volatile bool worker_running;
uint8_t count_repet;
FrequencyRSSI frequency_rssi_buf;
float filVal;
SubGhzFrequencyAnalyzerWorkerPairCallback pair_callback;
void* context;
};
// running average with adaptive coefficient
static uint32_t subghz_frequency_analyzer_worker_expRunningAverageAdaptive(
SubGhzFrequencyAnalyzerWorker* instance,
uint32_t newVal) {
float k;
float newValFloat = newVal;
// the sharpness of the filter depends on the absolute value of the difference
if(abs(newValFloat - instance->filVal) > 500000)
k = 0.9;
else
k = 0.03;
instance->filVal += (newValFloat - instance->filVal) * k;
return (uint32_t)instance->filVal;
}
/** Worker thread
*
* @param context
* @return exit code
*/
static int32_t subghz_frequency_analyzer_worker_thread(void* context) {
SubGhzFrequencyAnalyzerWorker* instance = context;
FrequencyRSSI frequency_rssi = {.frequency = 0, .rssi = 0};
float rssi;
uint32_t frequency;
uint32_t frequency_start;
//Start CC1101
furi_hal_subghz_reset();
furi_hal_subghz_load_preset(FuriHalSubGhzPresetOok650Async);
furi_hal_subghz_set_frequency(433920000);
furi_hal_subghz_flush_rx();
furi_hal_subghz_rx();
while(instance->worker_running) {
osDelay(10);
frequency_rssi.rssi = -127.0f;
furi_hal_subghz_idle();
furi_hal_subghz_load_registers(subghz_preset_ook_650khz);
for(size_t i = 0; i < subghz_frequencies_count; i++) {
if(furi_hal_subghz_is_frequency_valid(subghz_frequencies[i])) {
furi_hal_subghz_idle();
frequency = furi_hal_subghz_set_frequency(subghz_frequencies[i]);
furi_hal_subghz_rx();
osDelay(3);
rssi = furi_hal_subghz_get_rssi();
if(frequency_rssi.rssi < rssi) {
frequency_rssi.rssi = rssi;
frequency_rssi.frequency = frequency;
}
}
}
if(frequency_rssi.rssi > -90.0) {
// -0.5 ... 433.92 ... +0.5
frequency_start = frequency_rssi.frequency - 250000;
//step 10KHz
frequency_rssi.rssi = -127.0;
furi_hal_subghz_idle();
furi_hal_subghz_load_registers(subghz_preset_ook_58khz);
for(uint32_t i = frequency_start; i < frequency_start + 500000; i += 10000) {
if(furi_hal_subghz_is_frequency_valid(i)) {
furi_hal_subghz_idle();
frequency = furi_hal_subghz_set_frequency(i);
furi_hal_subghz_rx();
osDelay(3);
rssi = furi_hal_subghz_get_rssi();
if(frequency_rssi.rssi < rssi) {
frequency_rssi.rssi = rssi;
frequency_rssi.frequency = frequency;
}
}
}
}
if(frequency_rssi.rssi > -90.0) {
instance->count_repet = 20;
if(instance->filVal) {
frequency_rssi.frequency =
subghz_frequency_analyzer_worker_expRunningAverageAdaptive(
instance, frequency_rssi.frequency);
}
if(instance->pair_callback)
instance->pair_callback(
instance->context, frequency_rssi.frequency, frequency_rssi.rssi);
} else {
if(instance->count_repet > 0) {
instance->count_repet--;
} else {
instance->filVal = 0;
if(instance->pair_callback) instance->pair_callback(instance->context, 0, 0);
}
}
}
//Stop CC1101
furi_hal_subghz_idle();
furi_hal_subghz_sleep();
return 0;
}
SubGhzFrequencyAnalyzerWorker* subghz_frequency_analyzer_worker_alloc() {
SubGhzFrequencyAnalyzerWorker* instance = malloc(sizeof(SubGhzFrequencyAnalyzerWorker));
instance->thread = furi_thread_alloc();
furi_thread_set_name(instance->thread, "SubghzFAWorker");
furi_thread_set_stack_size(instance->thread, 2048);
furi_thread_set_context(instance->thread, instance);
furi_thread_set_callback(instance->thread, subghz_frequency_analyzer_worker_thread);
return instance;
}
void subghz_frequency_analyzer_worker_free(SubGhzFrequencyAnalyzerWorker* instance) {
furi_assert(instance);
furi_thread_free(instance->thread);
free(instance);
}
void subghz_frequency_analyzer_worker_set_pair_callback(
SubGhzFrequencyAnalyzerWorker* instance,
SubGhzFrequencyAnalyzerWorkerPairCallback callback,
void* context) {
furi_assert(instance);
furi_assert(context);
instance->pair_callback = callback;
instance->context = context;
}
void subghz_frequency_analyzer_worker_start(SubGhzFrequencyAnalyzerWorker* instance) {
furi_assert(instance);
furi_assert(!instance->worker_running);
instance->worker_running = true;
furi_thread_start(instance->thread);
}
void subghz_frequency_analyzer_worker_stop(SubGhzFrequencyAnalyzerWorker* instance) {
furi_assert(instance);
furi_assert(instance->worker_running);
instance->worker_running = false;
furi_thread_join(instance->thread);
}
bool subghz_frequency_analyzer_worker_is_running(SubGhzFrequencyAnalyzerWorker* instance) {
furi_assert(instance);
return instance->worker_running;
}
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