d003db0404
* Oregon v2.1 decoder * Refactor FSM to switch * Refactor headers * Format strings * Unit tests of oregon2 * Cleanups * Add oregon2 raw data to random_test_raw.sub * Adjust count of packets detected on random test * Format sources Co-authored-by: あく <alleteam@gmail.com>
325 lines
12 KiB
C
325 lines
12 KiB
C
#include "oregon2.h"
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#include "../blocks/const.h"
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#include "../blocks/decoder.h"
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#include "../blocks/generic.h"
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#include "../blocks/math.h"
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#include <lib/toolbox/manchester_decoder.h>
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#include <lib/flipper_format/flipper_format_i.h>
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#include <m-string.h>
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#define TAG "SubGhzProtocolOregon2"
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static const SubGhzBlockConst oregon2_const = {
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.te_long = 1000,
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.te_short = 500,
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.te_delta = 200,
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.min_count_bit_for_found = 32,
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};
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#define OREGON2_PREAMBLE_BITS 19
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#define OREGON2_PREAMBLE_MASK ((1 << (OREGON2_PREAMBLE_BITS + 1)) - 1)
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#define OREGON2_SENSOR_ID(d) (((d) >> 16) & 0xFFFF)
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#define OREGON2_CHECKSUM_BITS 8
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// 15 ones + 0101 (inverted A)
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#define OREGON2_PREAMBLE 0b1111111111111110101
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// bit indicating the low battery
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#define OREGON2_FLAG_BAT_LOW 0x4
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struct SubGhzProtocolDecoderOregon2 {
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SubGhzProtocolDecoderBase base;
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SubGhzBlockDecoder decoder;
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SubGhzBlockGeneric generic;
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ManchesterState manchester_state;
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bool prev_bit;
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bool have_bit;
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uint8_t var_bits;
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uint32_t var_data;
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};
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typedef struct SubGhzProtocolDecoderOregon2 SubGhzProtocolDecoderOregon2;
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typedef enum {
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Oregon2DecoderStepReset = 0,
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Oregon2DecoderStepFoundPreamble,
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Oregon2DecoderStepVarData,
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} Oregon2DecoderStep;
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void* subghz_protocol_decoder_oregon2_alloc(SubGhzEnvironment* environment) {
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UNUSED(environment);
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SubGhzProtocolDecoderOregon2* instance = malloc(sizeof(SubGhzProtocolDecoderOregon2));
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instance->base.protocol = &subghz_protocol_oregon2;
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instance->generic.protocol_name = instance->base.protocol->name;
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return instance;
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}
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void subghz_protocol_decoder_oregon2_free(void* context) {
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furi_assert(context);
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SubGhzProtocolDecoderOregon2* instance = context;
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free(instance);
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}
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void subghz_protocol_decoder_oregon2_reset(void* context) {
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furi_assert(context);
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SubGhzProtocolDecoderOregon2* instance = context;
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instance->decoder.parser_step = Oregon2DecoderStepReset;
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instance->decoder.decode_data = 0UL;
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instance->decoder.decode_count_bit = 0;
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manchester_advance(
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instance->manchester_state, ManchesterEventReset, &instance->manchester_state, NULL);
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instance->have_bit = false;
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instance->var_data = 0;
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instance->var_bits = 0;
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}
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static ManchesterEvent level_and_duration_to_event(bool level, uint32_t duration) {
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bool is_long = false;
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if(DURATION_DIFF(duration, oregon2_const.te_long) < oregon2_const.te_delta) {
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is_long = true;
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} else if(DURATION_DIFF(duration, oregon2_const.te_short) < oregon2_const.te_delta) {
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is_long = false;
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} else {
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return ManchesterEventReset;
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}
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if(level)
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return is_long ? ManchesterEventLongHigh : ManchesterEventShortHigh;
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else
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return is_long ? ManchesterEventLongLow : ManchesterEventShortLow;
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}
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// From sensor id code return amount of bits in variable section
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static uint8_t oregon2_sensor_id_var_bits(uint16_t sensor_id) {
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if(sensor_id == 0xEC40) return 16;
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return 0;
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}
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void subghz_protocol_decoder_oregon2_feed(void* context, bool level, uint32_t duration) {
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furi_assert(context);
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SubGhzProtocolDecoderOregon2* instance = context;
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// oregon v2.1 signal is inverted
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ManchesterEvent event = level_and_duration_to_event(!level, duration);
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bool data;
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// low-level bit sequence decoding
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if(event == ManchesterEventReset) {
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instance->decoder.parser_step = Oregon2DecoderStepReset;
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instance->have_bit = false;
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instance->decoder.decode_data = 0UL;
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instance->decoder.decode_count_bit = 0;
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}
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if(manchester_advance(instance->manchester_state, event, &instance->manchester_state, &data)) {
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if(instance->have_bit) {
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if(!instance->prev_bit && data) {
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subghz_protocol_blocks_add_bit(&instance->decoder, 1);
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} else if(instance->prev_bit && !data) {
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subghz_protocol_blocks_add_bit(&instance->decoder, 0);
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} else {
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subghz_protocol_decoder_oregon2_reset(context);
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}
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instance->have_bit = false;
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} else {
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instance->prev_bit = data;
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instance->have_bit = true;
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}
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}
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switch(instance->decoder.parser_step) {
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case Oregon2DecoderStepReset:
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// waiting for fixed oregon2 preamble
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if(instance->decoder.decode_count_bit >= OREGON2_PREAMBLE_BITS &&
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((instance->decoder.decode_data & OREGON2_PREAMBLE_MASK) == OREGON2_PREAMBLE)) {
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instance->decoder.parser_step = Oregon2DecoderStepFoundPreamble;
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instance->decoder.decode_count_bit = 0;
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instance->decoder.decode_data = 0UL;
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}
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break;
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case Oregon2DecoderStepFoundPreamble:
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// waiting for fixed oregon2 data
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if(instance->decoder.decode_count_bit == 32) {
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instance->generic.data = instance->decoder.decode_data;
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instance->generic.data_count_bit = instance->decoder.decode_count_bit;
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instance->decoder.decode_data = 0UL;
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instance->decoder.decode_count_bit = 0;
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// reverse nibbles in decoded data
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instance->generic.data = (instance->generic.data & 0x55555555) << 1 |
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(instance->generic.data & 0xAAAAAAAA) >> 1;
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instance->generic.data = (instance->generic.data & 0x33333333) << 2 |
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(instance->generic.data & 0xCCCCCCCC) >> 2;
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instance->var_bits =
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oregon2_sensor_id_var_bits(OREGON2_SENSOR_ID(instance->generic.data));
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if(!instance->var_bits) {
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// sensor is not supported, stop decoding, but showing the decoded fixed part
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instance->decoder.parser_step = Oregon2DecoderStepReset;
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if(instance->base.callback)
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instance->base.callback(&instance->base, instance->base.context);
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} else {
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instance->decoder.parser_step = Oregon2DecoderStepVarData;
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}
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}
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break;
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case Oregon2DecoderStepVarData:
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// waiting for variable (sensor-specific data)
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if(instance->decoder.decode_count_bit == instance->var_bits + OREGON2_CHECKSUM_BITS) {
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instance->var_data = instance->decoder.decode_data & 0xFFFFFFFF;
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// reverse nibbles in var data
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instance->var_data = (instance->var_data & 0x55555555) << 1 |
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(instance->var_data & 0xAAAAAAAA) >> 1;
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instance->var_data = (instance->var_data & 0x33333333) << 2 |
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(instance->var_data & 0xCCCCCCCC) >> 2;
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instance->decoder.parser_step = Oregon2DecoderStepReset;
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if(instance->base.callback)
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instance->base.callback(&instance->base, instance->base.context);
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}
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break;
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}
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}
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uint8_t subghz_protocol_decoder_oregon2_get_hash_data(void* context) {
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furi_assert(context);
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SubGhzProtocolDecoderOregon2* instance = context;
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return subghz_protocol_blocks_get_hash_data(
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&instance->decoder, (instance->decoder.decode_count_bit / 8) + 1);
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}
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bool subghz_protocol_decoder_oregon2_serialize(
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void* context,
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FlipperFormat* flipper_format,
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SubGhzPresetDefinition* preset) {
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furi_assert(context);
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SubGhzProtocolDecoderOregon2* instance = context;
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if(!subghz_block_generic_serialize(&instance->generic, flipper_format, preset)) return false;
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uint32_t temp = instance->var_bits;
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if(!flipper_format_write_uint32(flipper_format, "VarBits", &temp, 1)) {
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FURI_LOG_E(TAG, "Error adding VarBits");
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return false;
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}
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if(!flipper_format_write_hex(
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flipper_format,
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"VarData",
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(const uint8_t*)&instance->var_data,
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sizeof(instance->var_data))) {
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FURI_LOG_E(TAG, "Error adding VarData");
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return false;
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}
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return true;
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}
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bool subghz_protocol_decoder_oregon2_deserialize(void* context, FlipperFormat* flipper_format) {
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furi_assert(context);
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SubGhzProtocolDecoderOregon2* instance = context;
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bool ret = false;
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uint32_t temp_data;
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do {
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if(!subghz_block_generic_deserialize(&instance->generic, flipper_format)) {
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break;
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}
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if(!flipper_format_read_uint32(flipper_format, "VarBits", &temp_data, 1)) {
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FURI_LOG_E(TAG, "Missing VarLen");
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break;
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}
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instance->var_bits = (uint8_t)temp_data;
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if(!flipper_format_read_hex(
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flipper_format,
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"VarData",
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(uint8_t*)&instance->var_data,
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sizeof(instance->var_data))) {
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FURI_LOG_E(TAG, "Missing VarData");
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break;
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}
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if(instance->generic.data_count_bit != oregon2_const.min_count_bit_for_found) {
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FURI_LOG_E(TAG, "Wrong number of bits in key: %d", instance->generic.data_count_bit);
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break;
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}
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ret = true;
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} while(false);
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return ret;
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}
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// append string of the variable data
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static void
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oregon2_var_data_append_string(uint16_t sensor_id, uint32_t var_data, string_t output) {
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uint32_t val;
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if(sensor_id == 0xEC40) {
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val = ((var_data >> 4) & 0xF) * 10 + ((var_data >> 8) & 0xF);
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string_cat_printf(
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output,
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"Temp: %s%d.%d C\r\n",
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(var_data & 0xF) ? "-" : "+",
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val,
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(uint32_t)(var_data >> 12) & 0xF);
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}
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}
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static void oregon2_append_check_sum(uint32_t fix_data, uint32_t var_data, string_t output) {
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uint8_t sum = fix_data & 0xF;
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uint8_t ref_sum = var_data & 0xFF;
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var_data >>= 8;
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for(uint8_t i = 1; i < 8; i++) {
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fix_data >>= 4;
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var_data >>= 4;
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sum += (fix_data & 0xF) + (var_data & 0xF);
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}
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// swap calculated sum nibbles
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sum = (((sum >> 4) & 0xF) | (sum << 4)) & 0xFF;
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if(sum == ref_sum)
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string_cat_printf(output, "Sum ok: 0x%hhX", ref_sum);
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else
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string_cat_printf(output, "Sum err: 0x%hhX vs 0x%hhX", ref_sum, sum);
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}
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void subghz_protocol_decoder_oregon2_get_string(void* context, string_t output) {
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furi_assert(context);
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SubGhzProtocolDecoderOregon2* instance = context;
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uint16_t sensor_id = OREGON2_SENSOR_ID(instance->generic.data);
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string_cat_printf(
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output,
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"%s\r\n"
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"ID: 0x%04lX, ch: %d%s, rc: 0x%02lX\r\n",
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instance->generic.protocol_name,
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(uint32_t)sensor_id,
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(uint32_t)(instance->generic.data >> 12) & 0xF,
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((instance->generic.data & OREGON2_FLAG_BAT_LOW) ? ", low bat" : ""),
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(uint32_t)(instance->generic.data >> 4) & 0xFF);
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if(instance->var_bits > 0) {
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oregon2_var_data_append_string(
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sensor_id, instance->var_data >> OREGON2_CHECKSUM_BITS, output);
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oregon2_append_check_sum((uint32_t)instance->generic.data, instance->var_data, output);
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}
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}
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const SubGhzProtocolDecoder subghz_protocol_oregon2_decoder = {
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.alloc = subghz_protocol_decoder_oregon2_alloc,
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.free = subghz_protocol_decoder_oregon2_free,
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.feed = subghz_protocol_decoder_oregon2_feed,
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.reset = subghz_protocol_decoder_oregon2_reset,
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.get_hash_data = subghz_protocol_decoder_oregon2_get_hash_data,
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.serialize = subghz_protocol_decoder_oregon2_serialize,
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.deserialize = subghz_protocol_decoder_oregon2_deserialize,
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.get_string = subghz_protocol_decoder_oregon2_get_string,
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};
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const SubGhzProtocol subghz_protocol_oregon2 = {
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.name = SUBGHZ_PROTOCOL_OREGON2_NAME,
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.type = SubGhzProtocolTypeStatic,
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.flag = SubGhzProtocolFlag_433 | SubGhzProtocolFlag_AM | SubGhzProtocolFlag_Decodable |
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SubGhzProtocolFlag_Load | SubGhzProtocolFlag_Save,
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.decoder = &subghz_protocol_oregon2_decoder,
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};
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