269 lines
8.9 KiB
C
269 lines
8.9 KiB
C
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#include <furi.h>
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#include <toolbox/protocols/protocol.h>
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#include <lfrfid/tools/bit_lib.h>
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#include "lfrfid_protocols.h"
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// Example: 4944544B 351FBE4B
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// 01001001 01000100 01010100 01001011 00110101 00011111 10111110 01001011
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// 4 9 4 4 5 4 4 B 3 5 1 F B E 4 B
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// 0100 1001 0100 0100 0101 0100 0100 1011 0011 0101 0001 1111 1011 1110 0100 1011
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#define IDTECK_PREAMBLE_BIT_SIZE (32)
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#define IDTECK_PREAMBLE_DATA_SIZE (8)
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#define IDTECK_ENCODED_BIT_SIZE (64)
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#define IDTECK_ENCODED_DATA_SIZE (((IDTECK_ENCODED_BIT_SIZE) / 8) + IDTECK_PREAMBLE_DATA_SIZE)
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#define IDTECK_ENCODED_DATA_LAST ((IDTECK_ENCODED_BIT_SIZE) / 8)
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#define IDTECK_DECODED_BIT_SIZE (64)
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#define IDTECK_DECODED_DATA_SIZE (8)
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#define IDTECK_US_PER_BIT (255)
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#define IDTECK_ENCODER_PULSES_PER_BIT (16)
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typedef struct {
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uint8_t data_index;
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uint8_t bit_clock_index;
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bool last_bit;
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bool current_polarity;
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bool pulse_phase;
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} ProtocolIdteckEncoder;
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typedef struct {
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uint8_t encoded_data[IDTECK_ENCODED_DATA_SIZE];
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uint8_t negative_encoded_data[IDTECK_ENCODED_DATA_SIZE];
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uint8_t corrupted_encoded_data[IDTECK_ENCODED_DATA_SIZE];
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uint8_t corrupted_negative_encoded_data[IDTECK_ENCODED_DATA_SIZE];
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uint8_t data[IDTECK_DECODED_DATA_SIZE];
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ProtocolIdteckEncoder encoder;
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} ProtocolIdteck;
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ProtocolIdteck* protocol_idteck_alloc(void) {
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ProtocolIdteck* protocol = malloc(sizeof(ProtocolIdteck));
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return protocol;
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};
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void protocol_idteck_free(ProtocolIdteck* protocol) {
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free(protocol);
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};
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uint8_t* protocol_idteck_get_data(ProtocolIdteck* protocol) {
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return protocol->data;
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};
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void protocol_idteck_decoder_start(ProtocolIdteck* protocol) {
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memset(protocol->encoded_data, 0, IDTECK_ENCODED_DATA_SIZE);
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memset(protocol->negative_encoded_data, 0, IDTECK_ENCODED_DATA_SIZE);
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memset(protocol->corrupted_encoded_data, 0, IDTECK_ENCODED_DATA_SIZE);
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memset(protocol->corrupted_negative_encoded_data, 0, IDTECK_ENCODED_DATA_SIZE);
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};
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static bool protocol_idteck_check_preamble(uint8_t* data, size_t bit_index) {
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// Preamble 01001001 01000100 01010100 01001011
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if(*(uint32_t*)&data[bit_index / 8] != 0b01001011010101000100010001001001) return false;
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return true;
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}
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static bool protocol_idteck_can_be_decoded(uint8_t* data) {
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if(!protocol_idteck_check_preamble(data, 0)) return false;
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return true;
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}
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static bool protocol_idteck_decoder_feed_internal(bool polarity, uint32_t time, uint8_t* data) {
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time += (IDTECK_US_PER_BIT / 2);
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size_t bit_count = (time / IDTECK_US_PER_BIT);
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bool result = false;
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if(bit_count < IDTECK_ENCODED_BIT_SIZE) {
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for(size_t i = 0; i < bit_count; i++) {
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bit_lib_push_bit(data, IDTECK_ENCODED_DATA_SIZE, polarity);
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if(protocol_idteck_can_be_decoded(data)) {
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result = true;
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break;
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}
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}
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}
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return result;
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}
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static void protocol_idteck_decoder_save(uint8_t* data_to, const uint8_t* data_from) {
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bit_lib_copy_bits(data_to, 0, 64, data_from, 0);
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}
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bool protocol_idteck_decoder_feed(ProtocolIdteck* protocol, bool level, uint32_t duration) {
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bool result = false;
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if(duration > (IDTECK_US_PER_BIT / 2)) {
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if(protocol_idteck_decoder_feed_internal(level, duration, protocol->encoded_data)) {
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protocol_idteck_decoder_save(protocol->data, protocol->encoded_data);
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FURI_LOG_D("Idteck", "Positive");
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result = true;
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return result;
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}
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if(protocol_idteck_decoder_feed_internal(
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!level, duration, protocol->negative_encoded_data)) {
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protocol_idteck_decoder_save(protocol->data, protocol->negative_encoded_data);
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FURI_LOG_D("Idteck", "Negative");
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result = true;
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return result;
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}
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}
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if(duration > (IDTECK_US_PER_BIT / 4)) {
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// Try to decode wrong phase synced data
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if(level) {
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duration += 120;
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} else {
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if(duration > 120) {
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duration -= 120;
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}
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}
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if(protocol_idteck_decoder_feed_internal(
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level, duration, protocol->corrupted_encoded_data)) {
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protocol_idteck_decoder_save(protocol->data, protocol->corrupted_encoded_data);
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FURI_LOG_D("Idteck", "Positive Corrupted");
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result = true;
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return result;
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}
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if(protocol_idteck_decoder_feed_internal(
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!level, duration, protocol->corrupted_negative_encoded_data)) {
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protocol_idteck_decoder_save(
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protocol->data, protocol->corrupted_negative_encoded_data);
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FURI_LOG_D("Idteck", "Negative Corrupted");
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result = true;
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return result;
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}
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}
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return result;
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};
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bool protocol_idteck_encoder_start(ProtocolIdteck* protocol) {
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memset(protocol->encoded_data, 0, IDTECK_ENCODED_DATA_SIZE);
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*(uint32_t*)&protocol->encoded_data[0] = 0b01001011010101000100010001001001;
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bit_lib_copy_bits(protocol->encoded_data, 32, 32, protocol->data, 32);
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protocol->encoder.last_bit =
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bit_lib_get_bit(protocol->encoded_data, IDTECK_ENCODED_BIT_SIZE - 1);
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protocol->encoder.data_index = 0;
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protocol->encoder.current_polarity = true;
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protocol->encoder.pulse_phase = true;
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protocol->encoder.bit_clock_index = 0;
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return true;
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};
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LevelDuration protocol_idteck_encoder_yield(ProtocolIdteck* protocol) {
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LevelDuration level_duration;
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ProtocolIdteckEncoder* encoder = &protocol->encoder;
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if(encoder->pulse_phase) {
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level_duration = level_duration_make(encoder->current_polarity, 1);
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encoder->pulse_phase = false;
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} else {
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level_duration = level_duration_make(!encoder->current_polarity, 1);
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encoder->pulse_phase = true;
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encoder->bit_clock_index++;
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if(encoder->bit_clock_index >= IDTECK_ENCODER_PULSES_PER_BIT) {
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encoder->bit_clock_index = 0;
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bool current_bit = bit_lib_get_bit(protocol->encoded_data, encoder->data_index);
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if(current_bit != encoder->last_bit) {
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encoder->current_polarity = !encoder->current_polarity;
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}
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encoder->last_bit = current_bit;
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bit_lib_increment_index(encoder->data_index, IDTECK_ENCODED_BIT_SIZE);
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}
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}
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return level_duration;
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};
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// factory code
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static uint32_t get_fc(const uint8_t* data) {
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uint32_t fc = 0;
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fc = bit_lib_get_bits_32(data, 0, 32);
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return fc;
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}
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// card number
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static uint32_t get_card(const uint8_t* data) {
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uint32_t cn = 0;
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cn = bit_lib_get_bits_32(data, 32, 32);
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return cn;
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}
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void protocol_idteck_render_data_internal(ProtocolIdteck* protocol, FuriString* result, bool brief) {
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const uint32_t fc = get_fc(protocol->data);
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const uint32_t card = get_card(protocol->data);
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if(brief) {
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furi_string_printf(result, "FC: %08lX\r\nCard: %08lX", fc, card);
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} else {
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furi_string_printf(
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result,
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"FC: %08lX\r\n"
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"Card: %08lX\r\n",
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fc,
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card);
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}
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}
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void protocol_idteck_render_data(ProtocolIdteck* protocol, FuriString* result) {
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protocol_idteck_render_data_internal(protocol, result, false);
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}
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void protocol_idteck_render_brief_data(ProtocolIdteck* protocol, FuriString* result) {
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protocol_idteck_render_data_internal(protocol, result, true);
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}
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bool protocol_idteck_write_data(ProtocolIdteck* protocol, void* data) {
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LFRFIDWriteRequest* request = (LFRFIDWriteRequest*)data;
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bool result = false;
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protocol_idteck_encoder_start(protocol);
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if(request->write_type == LFRFIDWriteTypeT5577) {
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request->t5577.block[0] = LFRFID_T5577_BITRATE_RF_32 | LFRFID_T5577_MODULATION_PSK1 |
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(2 << LFRFID_T5577_MAXBLOCK_SHIFT);
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request->t5577.block[1] = bit_lib_get_bits_32(protocol->encoded_data, 0, 32);
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request->t5577.block[2] = bit_lib_get_bits_32(protocol->encoded_data, 32, 32);
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request->t5577.blocks_to_write = 3;
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result = true;
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}
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return result;
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};
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const ProtocolBase protocol_idteck = {
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.name = "Idteck",
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.manufacturer = "IDTECK",
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.data_size = IDTECK_DECODED_DATA_SIZE,
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.features = LFRFIDFeaturePSK,
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.validate_count = 6,
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.alloc = (ProtocolAlloc)protocol_idteck_alloc,
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.free = (ProtocolFree)protocol_idteck_free,
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.get_data = (ProtocolGetData)protocol_idteck_get_data,
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.decoder =
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{
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.start = (ProtocolDecoderStart)protocol_idteck_decoder_start,
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.feed = (ProtocolDecoderFeed)protocol_idteck_decoder_feed,
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},
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.encoder =
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{
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.start = (ProtocolEncoderStart)protocol_idteck_encoder_start,
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.yield = (ProtocolEncoderYield)protocol_idteck_encoder_yield,
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},
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.render_data = (ProtocolRenderData)protocol_idteck_render_data,
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.render_brief_data = (ProtocolRenderData)protocol_idteck_render_brief_data,
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.write_data = (ProtocolWriteData)protocol_idteck_write_data,
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};
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