mirror of
https://github.com/eried/portapack-mayhem.git
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102 lines
3.9 KiB
C++
102 lines
3.9 KiB
C++
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#ifndef __FPROTO_KEELOQ_H__
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#define __FPROTO_KEELOQ_H__
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#include "subghzdbase.hpp"
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typedef enum : uint8_t {
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KeeloqDecoderStepReset = 0,
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KeeloqDecoderStepCheckPreambula,
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KeeloqDecoderStepSaveDuration,
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KeeloqDecoderStepCheckDuration,
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} KeeloqDecoderStep;
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class FProtoSubGhzDKeeLoq : public FProtoSubGhzDBase {
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public:
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FProtoSubGhzDKeeLoq() {
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sensorType = FPS_KEELOQ;
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te_short = 400;
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te_long = 800;
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te_delta = 140;
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min_count_bit_for_found = 64;
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}
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void feed(bool level, uint32_t duration) {
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switch (parser_step) {
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case KeeloqDecoderStepReset:
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if ((level) && DURATION_DIFF(duration, te_short) < te_delta) {
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parser_step = KeeloqDecoderStepCheckPreambula;
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header_count++;
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}
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break;
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case KeeloqDecoderStepCheckPreambula:
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if ((!level) && (DURATION_DIFF(duration, te_short) < te_delta)) {
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parser_step = KeeloqDecoderStepReset;
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break;
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}
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if ((header_count > 2) && (DURATION_DIFF(duration, te_short * 10) < te_delta * 10)) {
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// Found header
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parser_step = KeeloqDecoderStepSaveDuration;
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decode_data = 0;
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decode_count_bit = 0;
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} else {
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parser_step = KeeloqDecoderStepReset;
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header_count = 0;
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}
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break;
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case KeeloqDecoderStepSaveDuration:
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if (level) {
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te_last = duration;
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parser_step = KeeloqDecoderStepCheckDuration;
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}
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break;
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case KeeloqDecoderStepCheckDuration:
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if (!level) {
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if (duration >= ((uint32_t)te_short * 2 + te_delta)) {
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// Found end TX
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parser_step = KeeloqDecoderStepReset;
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if ((decode_count_bit >= min_count_bit_for_found) &&
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(decode_count_bit <= min_count_bit_for_found + 2)) {
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if (data != decode_data) {
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data = decode_data;
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data_count_bit = min_count_bit_for_found;
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if (callback) callback(this);
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}
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decode_data = 0;
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decode_count_bit = 0;
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header_count = 0;
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}
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break;
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} else if (
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(DURATION_DIFF(te_last, te_short) < te_delta) &&
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(DURATION_DIFF(duration, te_long) < te_delta * 2)) {
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if (decode_count_bit < min_count_bit_for_found) {
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subghz_protocol_blocks_add_bit(1);
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} else {
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decode_count_bit++;
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}
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parser_step = KeeloqDecoderStepSaveDuration;
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} else if (
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(DURATION_DIFF(te_last, te_long) < te_delta * 2) &&
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(DURATION_DIFF(duration, te_short) < te_delta)) {
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if (decode_count_bit < min_count_bit_for_found) {
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subghz_protocol_blocks_add_bit(0);
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} else {
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decode_count_bit++;
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}
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parser_step = KeeloqDecoderStepSaveDuration;
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} else {
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parser_step = KeeloqDecoderStepReset;
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header_count = 0;
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}
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} else {
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parser_step = KeeloqDecoderStepReset;
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header_count = 0;
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}
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break;
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}
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}
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};
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#endif
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