unleashed-firmware/lib/subghz/protocols/subghz_protocol_came.c

#include "subghz_protocol_came.h"
#include "subghz_protocol_common.h"

/*
 * Help
 * https://phreakerclub.com/447
 *
 */

struct SubGhzProtocolCame {
    SubGhzProtocolCommon common;
};

typedef enum {
    CameDecoderStepReset = 0,
    CameDecoderStepFoundStartBit,
    CameDecoderStepSaveDuration,
    CameDecoderStepCheckDuration,
} CameDecoderStep;

SubGhzProtocolCame* subghz_protocol_came_alloc() {
    SubGhzProtocolCame* instance = furi_alloc(sizeof(SubGhzProtocolCame));

    instance->common.name = "CAME";
    instance->common.code_min_count_bit_for_found = 12;
    instance->common.te_short = 320;
    instance->common.te_long = 640;
    instance->common.te_delta = 150;
    instance->common.type_protocol = SubGhzProtocolCommonTypeStatic;
    instance->common.to_string = (SubGhzProtocolCommonToStr)subghz_protocol_came_to_str;
    instance->common.to_save_string =
        (SubGhzProtocolCommonGetStrSave)subghz_protocol_came_to_save_str;
    instance->common.to_load_protocol_from_file =
        (SubGhzProtocolCommonLoadFromFile)subghz_protocol_came_to_load_protocol_from_file;
    instance->common.to_load_protocol =
        (SubGhzProtocolCommonLoadFromRAW)subghz_decoder_came_to_load_protocol;
    instance->common.get_upload_protocol =
        (SubGhzProtocolCommonEncoderGetUpLoad)subghz_protocol_came_send_key;

    return instance;
}

void subghz_protocol_came_free(SubGhzProtocolCame* instance) {
    furi_assert(instance);
    free(instance);
}

bool subghz_protocol_came_send_key(
    SubGhzProtocolCame* instance,
    SubGhzProtocolCommonEncoder* encoder) {
    furi_assert(instance);
    furi_assert(encoder);
    size_t index = 0;
    encoder->size_upload = (instance->common.code_last_count_bit * 2) + 2;
    if(encoder->size_upload > SUBGHZ_ENCODER_UPLOAD_MAX_SIZE) return false;
    //Send header
    encoder->upload[index++] =
        level_duration_make(false, (uint32_t)instance->common.te_short * 36);
    //Send start bit
    encoder->upload[index++] = level_duration_make(true, (uint32_t)instance->common.te_short);
    //Send key data
    for(uint8_t i = instance->common.code_last_count_bit; i > 0; i--) {
        if(bit_read(instance->common.code_last_found, i - 1)) {
            //send bit 1
            encoder->upload[index++] =
                level_duration_make(false, (uint32_t)instance->common.te_long);
            encoder->upload[index++] =
                level_duration_make(true, (uint32_t)instance->common.te_short);
        } else {
            //send bit 0
            encoder->upload[index++] =
                level_duration_make(false, (uint32_t)instance->common.te_short);
            encoder->upload[index++] =
                level_duration_make(true, (uint32_t)instance->common.te_long);
        }
    }
    return true;
}

void subghz_protocol_came_reset(SubGhzProtocolCame* instance) {
    instance->common.parser_step = CameDecoderStepReset;
}

void subghz_protocol_came_parse(SubGhzProtocolCame* instance, bool level, uint32_t duration) {
    switch(instance->common.parser_step) {
    case CameDecoderStepReset:
        if((!level) && (DURATION_DIFF(duration, instance->common.te_short * 51) <
                        instance->common.te_delta * 51)) { //Need protocol 36 te_short
            //Found header CAME
            instance->common.parser_step = CameDecoderStepFoundStartBit;
        } else {
            instance->common.parser_step = CameDecoderStepReset;
        }
        break;
    case CameDecoderStepFoundStartBit:
        if(!level) {
            break;
        } else if(DURATION_DIFF(duration, instance->common.te_short) < instance->common.te_delta) {
            //Found start bit CAME
            instance->common.parser_step = CameDecoderStepSaveDuration;
            instance->common.code_found = 0;
            instance->common.code_count_bit = 0;
        } else {
            instance->common.parser_step = CameDecoderStepReset;
        }
        break;
    case CameDecoderStepSaveDuration:
        if(!level) { //save interval
            if(duration >= (instance->common.te_short * 4)) {
                instance->common.parser_step = CameDecoderStepFoundStartBit;
                if(instance->common.code_count_bit >=
                   instance->common.code_min_count_bit_for_found) {
                    instance->common.serial = 0x0;
                    instance->common.btn = 0x0;

                    instance->common.code_last_found = instance->common.code_found;
                    instance->common.code_last_count_bit = instance->common.code_count_bit;

                    if(instance->common.callback)
                        instance->common.callback(
                            (SubGhzProtocolCommon*)instance, instance->common.context);
                }
                break;
            }
            instance->common.te_last = duration;
            instance->common.parser_step = CameDecoderStepCheckDuration;
        } else {
            instance->common.parser_step = CameDecoderStepReset;
        }
        break;
    case CameDecoderStepCheckDuration:
        if(level) {
            if((DURATION_DIFF(instance->common.te_last, instance->common.te_short) <
                instance->common.te_delta) &&
               (DURATION_DIFF(duration, instance->common.te_long) < instance->common.te_delta)) {
                subghz_protocol_common_add_bit(&instance->common, 0);
                instance->common.parser_step = CameDecoderStepSaveDuration;
            } else if(
                (DURATION_DIFF(instance->common.te_last, instance->common.te_long) <
                 instance->common.te_delta) &&
                (DURATION_DIFF(duration, instance->common.te_short) < instance->common.te_delta)) {
                subghz_protocol_common_add_bit(&instance->common, 1);
                instance->common.parser_step = CameDecoderStepSaveDuration;
            } else
                instance->common.parser_step = CameDecoderStepReset;
        } else {
            instance->common.parser_step = CameDecoderStepReset;
        }
        break;
    }
}

void subghz_protocol_came_to_str(SubGhzProtocolCame* instance, string_t output) {
    uint32_t code_found_lo = instance->common.code_last_found & 0x00000000ffffffff;

    uint64_t code_found_reverse = subghz_protocol_common_reverse_key(
        instance->common.code_last_found, instance->common.code_last_count_bit);

    uint32_t code_found_reverse_lo = code_found_reverse & 0x00000000ffffffff;

    string_cat_printf(
        output,
        "%s %dbit\r\n"
        "Key:0x%08lX\r\n"
        "Yek:0x%08lX\r\n",
        instance->common.name,
        instance->common.code_last_count_bit,
        code_found_lo,
        code_found_reverse_lo);
}

void subghz_protocol_came_to_save_str(SubGhzProtocolCame* instance, string_t output) {
    string_printf(
        output,
        "Protocol: %s\n"
        "Bit: %d\n"
        "Key: %08lX\n",
        instance->common.name,
        instance->common.code_last_count_bit,
        (uint32_t)(instance->common.code_last_found & 0x00000000ffffffff));
}

bool subghz_protocol_came_to_load_protocol_from_file(
    FileWorker* file_worker,
    SubGhzProtocolCame* instance) {
    bool loaded = false;
    string_t temp_str;
    string_init(temp_str);
    int res = 0;
    int data = 0;

    do {
        // Read and parse bit data from 2nd line
        if(!file_worker_read_until(file_worker, temp_str, '\n')) {
            break;
        }
        res = sscanf(string_get_cstr(temp_str), "Bit: %d\n", &data);
        if(res != 1) {
            break;
        }
        instance->common.code_last_count_bit = (uint8_t)data;

        // Read and parse key data from 3nd line
        if(!file_worker_read_until(file_worker, temp_str, '\n')) {
            break;
        }
        uint32_t temp_key = 0;
        res = sscanf(string_get_cstr(temp_str), "Key: %08lX\n", &temp_key);
        if(res != 1) {
            break;
        }
        instance->common.code_last_found = (uint64_t)temp_key;

        loaded = true;
    } while(0);

    string_clear(temp_str);

    return loaded;
}

void subghz_decoder_came_to_load_protocol(SubGhzProtocolCame* instance, void* context) {
    furi_assert(context);
    furi_assert(instance);
    SubGhzProtocolCommonLoad* data = context;
    instance->common.code_last_found = data->code_found;
    instance->common.code_last_count_bit = data->code_count_bit;
}