mirror of
https://github.com/DarkFlippers/unleashed-firmware
synced 2024-12-26 20:53:07 +00:00
365 lines
13 KiB
C
365 lines
13 KiB
C
#include "oregon3.h"
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#include <lib/subghz/blocks/const.h>
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#include <lib/subghz/blocks/decoder.h>
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#include <lib/subghz/blocks/encoder.h>
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#include <lib/subghz/blocks/math.h>
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#include "ws_generic.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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#define TAG "WSProtocolOregon3"
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static const SubGhzBlockConst ws_oregon3_const = {
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.te_long = 1100,
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.te_short = 500,
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.te_delta = 300,
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.min_count_bit_for_found = 32,
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};
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#define OREGON3_PREAMBLE_BITS 28
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#define OREGON3_PREAMBLE_MASK 0b1111111111111111111111111111
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// 24 ones + 0101 (inverted A)
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#define OREGON3_PREAMBLE 0b1111111111111111111111110101
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// Fixed part contains:
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// - Sensor type: 16 bits
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// - Channel: 4 bits
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// - ID (changes when batteries are changed): 8 bits
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// - Battery status: 4 bits
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#define OREGON3_FIXED_PART_BITS (16 + 4 + 8 + 4)
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#define OREGON3_SENSOR_ID(d) (((d) >> 16) & 0xFFFF)
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#define OREGON3_CHECKSUM_BITS 8
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// bit indicating the low battery
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#define OREGON3_FLAG_BAT_LOW 0x4
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/// Documentation for Oregon Scientific protocols can be found here:
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/// https://www.osengr.org/Articles/OS-RF-Protocols-IV.pdf
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// Sensors ID
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#define ID_THGR221 0xf824
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struct WSProtocolDecoderOregon3 {
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SubGhzProtocolDecoderBase base;
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SubGhzBlockDecoder decoder;
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WSBlockGeneric generic;
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ManchesterState manchester_state;
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bool prev_bit;
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uint8_t var_bits;
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uint64_t var_data;
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};
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typedef struct WSProtocolDecoderOregon3 WSProtocolDecoderOregon3;
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typedef enum {
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Oregon3DecoderStepReset = 0,
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Oregon3DecoderStepFoundPreamble,
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Oregon3DecoderStepVarData,
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} Oregon3DecoderStep;
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void* ws_protocol_decoder_oregon3_alloc(SubGhzEnvironment* environment) {
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UNUSED(environment);
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WSProtocolDecoderOregon3* instance = malloc(sizeof(WSProtocolDecoderOregon3));
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instance->base.protocol = &ws_protocol_oregon3;
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instance->generic.protocol_name = instance->base.protocol->name;
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instance->generic.humidity = WS_NO_HUMIDITY;
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instance->generic.temp = WS_NO_TEMPERATURE;
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instance->generic.btn = WS_NO_BTN;
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instance->generic.channel = WS_NO_CHANNEL;
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instance->generic.battery_low = WS_NO_BATT;
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instance->generic.id = WS_NO_ID;
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instance->prev_bit = false;
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return instance;
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}
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void ws_protocol_decoder_oregon3_free(void* context) {
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furi_assert(context);
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WSProtocolDecoderOregon3* instance = context;
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free(instance);
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}
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void ws_protocol_decoder_oregon3_reset(void* context) {
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furi_assert(context);
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WSProtocolDecoderOregon3* instance = context;
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instance->decoder.parser_step = Oregon3DecoderStepReset;
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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->prev_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, ws_oregon3_const.te_long) < ws_oregon3_const.te_delta) {
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is_long = true;
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} else if(DURATION_DIFF(duration, ws_oregon3_const.te_short) < ws_oregon3_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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// https://temofeev.ru/info/articles/o-dekodirovanii-protokola-pogodnykh-datchikov-oregon-scientific
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static uint8_t oregon3_sensor_id_var_bits(uint16_t sensor_id) {
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switch(sensor_id) {
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case ID_THGR221:
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// nibbles: temp + hum + '0'
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return (4 + 2 + 1) * 4;
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default:
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FURI_LOG_D(TAG, "Unsupported sensor id 0x%x", sensor_id);
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return 0;
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}
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}
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static void ws_oregon3_decode_const_data(WSBlockGeneric* ws_block) {
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ws_block->id = OREGON3_SENSOR_ID(ws_block->data);
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ws_block->channel = (ws_block->data >> 12) & 0xF;
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ws_block->battery_low = (ws_block->data & OREGON3_FLAG_BAT_LOW) ? 1 : 0;
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}
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static uint16_t ws_oregon3_bcd_decode_short(uint32_t data) {
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return (data & 0xF) * 10 + ((data >> 4) & 0xF);
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}
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static float ws_oregon3_decode_temp(uint32_t data) {
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int32_t temp_val;
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temp_val = ws_oregon3_bcd_decode_short(data >> 4);
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temp_val *= 10;
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temp_val += (data >> 12) & 0xF;
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if(data & 0xF) temp_val = -temp_val;
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return (float)temp_val / 10.0;
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}
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static void ws_oregon3_decode_var_data(WSBlockGeneric* ws_b, uint16_t sensor_id, uint32_t data) {
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switch(sensor_id) {
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case ID_THGR221:
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default:
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ws_b->humidity = ws_oregon3_bcd_decode_short(data >> 4);
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ws_b->temp = ws_oregon3_decode_temp(data >> 12);
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break;
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}
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}
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void ws_protocol_decoder_oregon3_feed(void* context, bool level, uint32_t duration) {
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furi_assert(context);
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WSProtocolDecoderOregon3* instance = context;
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// Oregon v3.0 protocol is inverted
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ManchesterEvent event = level_and_duration_to_event(!level, duration);
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// low-level bit sequence decoding
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if(event == ManchesterEventReset) {
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instance->decoder.parser_step = Oregon3DecoderStepReset;
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instance->prev_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(
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instance->manchester_state, event, &instance->manchester_state, &instance->prev_bit)) {
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subghz_protocol_blocks_add_bit(&instance->decoder, instance->prev_bit);
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}
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switch(instance->decoder.parser_step) {
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case Oregon3DecoderStepReset:
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// waiting for fixed oregon3 preamble
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if(instance->decoder.decode_count_bit >= OREGON3_PREAMBLE_BITS &&
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((instance->decoder.decode_data & OREGON3_PREAMBLE_MASK) == OREGON3_PREAMBLE)) {
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instance->decoder.parser_step = Oregon3DecoderStepFoundPreamble;
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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 Oregon3DecoderStepFoundPreamble:
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// waiting for fixed oregon3 data
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if(instance->decoder.decode_count_bit == OREGON3_FIXED_PART_BITS) {
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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 as oregon v3.0 is LSB first
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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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ws_oregon3_decode_const_data(&instance->generic);
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instance->var_bits =
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oregon3_sensor_id_var_bits(OREGON3_SENSOR_ID(instance->generic.data));
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if(!instance->var_bits) {
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// sensor is not supported, stop decoding
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instance->decoder.parser_step = Oregon3DecoderStepReset;
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} else {
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instance->decoder.parser_step = Oregon3DecoderStepVarData;
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}
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}
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break;
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case Oregon3DecoderStepVarData:
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// waiting for variable (sensor-specific data)
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if(instance->decoder.decode_count_bit == instance->var_bits + OREGON3_CHECKSUM_BITS) {
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instance->var_data = instance->decoder.decode_data & 0xFFFFFFFFFFFFFFFF;
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// reverse nibbles in var data
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instance->var_data = (instance->var_data & 0x5555555555555555) << 1 |
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(instance->var_data & 0xAAAAAAAAAAAAAAAA) >> 1;
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instance->var_data = (instance->var_data & 0x3333333333333333) << 2 |
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(instance->var_data & 0xCCCCCCCCCCCCCCCC) >> 2;
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ws_oregon3_decode_var_data(
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&instance->generic,
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OREGON3_SENSOR_ID(instance->generic.data),
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instance->var_data >> OREGON3_CHECKSUM_BITS);
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instance->decoder.parser_step = Oregon3DecoderStepReset;
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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 ws_protocol_decoder_oregon3_get_hash_data(void* context) {
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furi_assert(context);
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WSProtocolDecoderOregon3* 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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SubGhzProtocolStatus ws_protocol_decoder_oregon3_serialize(
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void* context,
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FlipperFormat* flipper_format,
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SubGhzRadioPreset* preset) {
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furi_assert(context);
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WSProtocolDecoderOregon3* instance = context;
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SubGhzProtocolStatus ret = SubGhzProtocolStatusError;
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ret = ws_block_generic_serialize(&instance->generic, flipper_format, preset);
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if(ret != SubGhzProtocolStatusOk) return ret;
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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 SubGhzProtocolStatusErrorParserOthers;
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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 SubGhzProtocolStatusErrorParserOthers;
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}
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return ret;
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}
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SubGhzProtocolStatus
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ws_protocol_decoder_oregon3_deserialize(void* context, FlipperFormat* flipper_format) {
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furi_assert(context);
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WSProtocolDecoderOregon3* instance = context;
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uint32_t temp_data;
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SubGhzProtocolStatus ret = SubGhzProtocolStatusError;
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do {
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ret = ws_block_generic_deserialize(&instance->generic, flipper_format);
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if(ret != SubGhzProtocolStatusOk) {
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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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ret = SubGhzProtocolStatusErrorParserOthers;
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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))) { //-V1051
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FURI_LOG_E(TAG, "Missing VarData");
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ret = SubGhzProtocolStatusErrorParserOthers;
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break;
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}
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if(instance->generic.data_count_bit != ws_oregon3_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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ret = SubGhzProtocolStatusErrorValueBitCount;
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break;
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}
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} while(false);
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return ret;
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}
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static void oregon3_append_check_sum(uint32_t fix_data, uint64_t var_data, FuriString* 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 >>= 4;
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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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furi_string_cat_printf(output, "Sum ok: 0x%hhX", ref_sum);
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else
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furi_string_cat_printf(output, "Sum err: 0x%hhX vs 0x%hhX", ref_sum, sum);
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}
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void ws_protocol_decoder_oregon3_get_string(void* context, FuriString* output) {
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furi_assert(context);
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WSProtocolDecoderOregon3* instance = context;
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furi_string_cat_printf(
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output,
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"%s\r\n"
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"ID: 0x%04lX, ch: %d, bat: %d, rc: 0x%02lX\r\n",
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instance->generic.protocol_name,
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instance->generic.id,
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instance->generic.channel,
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instance->generic.battery_low,
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(uint32_t)(instance->generic.data >> 4) & 0xFF);
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if(instance->var_bits > 0) {
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furi_string_cat_printf(
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output,
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"Temp:%d.%d C Hum:%d%%",
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(int16_t)instance->generic.temp,
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abs(
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((int16_t)(instance->generic.temp * 10) -
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(((int16_t)instance->generic.temp) * 10))),
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instance->generic.humidity);
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oregon3_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 ws_protocol_oregon3_decoder = {
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.alloc = ws_protocol_decoder_oregon3_alloc,
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.free = ws_protocol_decoder_oregon3_free,
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.feed = ws_protocol_decoder_oregon3_feed,
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.reset = ws_protocol_decoder_oregon3_reset,
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.get_hash_data = ws_protocol_decoder_oregon3_get_hash_data,
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.serialize = ws_protocol_decoder_oregon3_serialize,
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.deserialize = ws_protocol_decoder_oregon3_deserialize,
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.get_string = ws_protocol_decoder_oregon3_get_string,
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};
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const SubGhzProtocol ws_protocol_oregon3 = {
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.name = WS_PROTOCOL_OREGON3_NAME,
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.type = SubGhzProtocolWeatherStation,
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.flag = SubGhzProtocolFlag_433 | SubGhzProtocolFlag_AM | SubGhzProtocolFlag_Decodable,
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.decoder = &ws_protocol_oregon3_decoder,
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};
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