d76ba20652
* Add support for Pyramid tags * Also add additional checks for AWID decoder to avoid missdetection * lfrfid worker: reset GPIO_LOAD pin * lfrfid: protocol viking, format * lfrfid: protocol pyramid, format * lfrfid: protocol paradox, format * lfrfid: protocol jablotron, format * lfrfid: protocol em4100, format * lfrfid: increase reading time by 0.5s since protocol viking takes longer to read Co-authored-by: SG <who.just.the.doctor@gmail.com>
292 lines
8.8 KiB
C
292 lines
8.8 KiB
C
#include <furi.h>
|
|
#include <toolbox/protocols/protocol.h>
|
|
#include <toolbox/manchester_decoder.h>
|
|
#include "lfrfid_protocols.h"
|
|
|
|
typedef uint64_t EM4100DecodedData;
|
|
|
|
#define EM_HEADER_POS (55)
|
|
#define EM_HEADER_MASK (0x1FFLLU << EM_HEADER_POS)
|
|
|
|
#define EM_FIRST_ROW_POS (50)
|
|
|
|
#define EM_ROW_COUNT (10)
|
|
#define EM_COLUMN_COUNT (4)
|
|
#define EM_BITS_PER_ROW_COUNT (EM_COLUMN_COUNT + 1)
|
|
|
|
#define EM_COLUMN_POS (4)
|
|
#define EM_STOP_POS (0)
|
|
#define EM_STOP_MASK (0x1LLU << EM_STOP_POS)
|
|
|
|
#define EM_HEADER_AND_STOP_MASK (EM_HEADER_MASK | EM_STOP_MASK)
|
|
#define EM_HEADER_AND_STOP_DATA (EM_HEADER_MASK)
|
|
|
|
#define EM4100_DECODED_DATA_SIZE (5)
|
|
#define EM4100_ENCODED_DATA_SIZE (sizeof(EM4100DecodedData))
|
|
|
|
#define EM4100_CLOCK_PER_BIT (64)
|
|
|
|
#define EM_READ_SHORT_TIME (256)
|
|
#define EM_READ_LONG_TIME (512)
|
|
#define EM_READ_JITTER_TIME (100)
|
|
|
|
#define EM_READ_SHORT_TIME_LOW (EM_READ_SHORT_TIME - EM_READ_JITTER_TIME)
|
|
#define EM_READ_SHORT_TIME_HIGH (EM_READ_SHORT_TIME + EM_READ_JITTER_TIME)
|
|
#define EM_READ_LONG_TIME_LOW (EM_READ_LONG_TIME - EM_READ_JITTER_TIME)
|
|
#define EM_READ_LONG_TIME_HIGH (EM_READ_LONG_TIME + EM_READ_JITTER_TIME)
|
|
|
|
typedef struct {
|
|
uint8_t data[EM4100_DECODED_DATA_SIZE];
|
|
|
|
EM4100DecodedData encoded_data;
|
|
uint8_t encoded_data_index;
|
|
bool encoded_polarity;
|
|
|
|
ManchesterState decoder_manchester_state;
|
|
} ProtocolEM4100;
|
|
|
|
ProtocolEM4100* protocol_em4100_alloc(void) {
|
|
ProtocolEM4100* proto = malloc(sizeof(ProtocolEM4100));
|
|
return (void*)proto;
|
|
};
|
|
|
|
void protocol_em4100_free(ProtocolEM4100* proto) {
|
|
free(proto);
|
|
};
|
|
|
|
uint8_t* protocol_em4100_get_data(ProtocolEM4100* proto) {
|
|
return proto->data;
|
|
};
|
|
|
|
static void em4100_decode(
|
|
const uint8_t* encoded_data,
|
|
const uint8_t encoded_data_size,
|
|
uint8_t* decoded_data,
|
|
const uint8_t decoded_data_size) {
|
|
furi_check(decoded_data_size >= EM4100_DECODED_DATA_SIZE);
|
|
furi_check(encoded_data_size >= EM4100_ENCODED_DATA_SIZE);
|
|
|
|
uint8_t decoded_data_index = 0;
|
|
EM4100DecodedData card_data = *((EM4100DecodedData*)(encoded_data));
|
|
|
|
// clean result
|
|
memset(decoded_data, 0, decoded_data_size);
|
|
|
|
// header
|
|
for(uint8_t i = 0; i < 9; i++) {
|
|
card_data = card_data << 1;
|
|
}
|
|
|
|
// nibbles
|
|
uint8_t value = 0;
|
|
for(uint8_t r = 0; r < EM_ROW_COUNT; r++) {
|
|
uint8_t nibble = 0;
|
|
for(uint8_t i = 0; i < 5; i++) {
|
|
if(i < 4) nibble = (nibble << 1) | (card_data & (1LLU << 63) ? 1 : 0);
|
|
card_data = card_data << 1;
|
|
}
|
|
value = (value << 4) | nibble;
|
|
if(r % 2) {
|
|
decoded_data[decoded_data_index] |= value;
|
|
decoded_data_index++;
|
|
value = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
static bool em4100_can_be_decoded(const uint8_t* encoded_data, const uint8_t encoded_data_size) {
|
|
furi_check(encoded_data_size >= EM4100_ENCODED_DATA_SIZE);
|
|
const EM4100DecodedData* card_data = (EM4100DecodedData*)encoded_data;
|
|
|
|
// check header and stop bit
|
|
if((*card_data & EM_HEADER_AND_STOP_MASK) != EM_HEADER_AND_STOP_DATA) return false;
|
|
|
|
// check row parity
|
|
for(uint8_t i = 0; i < EM_ROW_COUNT; i++) {
|
|
uint8_t parity_sum = 0;
|
|
|
|
for(uint8_t j = 0; j < EM_BITS_PER_ROW_COUNT; j++) {
|
|
parity_sum += (*card_data >> (EM_FIRST_ROW_POS - i * EM_BITS_PER_ROW_COUNT + j)) & 1;
|
|
}
|
|
|
|
if((parity_sum % 2)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// check columns parity
|
|
for(uint8_t i = 0; i < EM_COLUMN_COUNT; i++) {
|
|
uint8_t parity_sum = 0;
|
|
|
|
for(uint8_t j = 0; j < EM_ROW_COUNT + 1; j++) {
|
|
parity_sum += (*card_data >> (EM_COLUMN_POS - i + j * EM_BITS_PER_ROW_COUNT)) & 1;
|
|
}
|
|
|
|
if((parity_sum % 2)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void protocol_em4100_decoder_start(ProtocolEM4100* proto) {
|
|
memset(proto->data, 0, EM4100_DECODED_DATA_SIZE);
|
|
proto->encoded_data = 0;
|
|
manchester_advance(
|
|
proto->decoder_manchester_state,
|
|
ManchesterEventReset,
|
|
&proto->decoder_manchester_state,
|
|
NULL);
|
|
};
|
|
|
|
bool protocol_em4100_decoder_feed(ProtocolEM4100* proto, bool level, uint32_t duration) {
|
|
bool result = false;
|
|
|
|
ManchesterEvent event = ManchesterEventReset;
|
|
|
|
if(duration > EM_READ_SHORT_TIME_LOW && duration < EM_READ_SHORT_TIME_HIGH) {
|
|
if(!level) {
|
|
event = ManchesterEventShortHigh;
|
|
} else {
|
|
event = ManchesterEventShortLow;
|
|
}
|
|
} else if(duration > EM_READ_LONG_TIME_LOW && duration < EM_READ_LONG_TIME_HIGH) {
|
|
if(!level) {
|
|
event = ManchesterEventLongHigh;
|
|
} else {
|
|
event = ManchesterEventLongLow;
|
|
}
|
|
}
|
|
|
|
if(event != ManchesterEventReset) {
|
|
bool data;
|
|
bool data_ok = manchester_advance(
|
|
proto->decoder_manchester_state, event, &proto->decoder_manchester_state, &data);
|
|
|
|
if(data_ok) {
|
|
proto->encoded_data = (proto->encoded_data << 1) | data;
|
|
|
|
if(em4100_can_be_decoded((uint8_t*)&proto->encoded_data, sizeof(EM4100DecodedData))) {
|
|
em4100_decode(
|
|
(uint8_t*)&proto->encoded_data,
|
|
sizeof(EM4100DecodedData),
|
|
proto->data,
|
|
EM4100_DECODED_DATA_SIZE);
|
|
result = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
return result;
|
|
};
|
|
|
|
static void em4100_write_nibble(bool low_nibble, uint8_t data, EM4100DecodedData* encoded_data) {
|
|
uint8_t parity_sum = 0;
|
|
uint8_t start = 0;
|
|
if(!low_nibble) start = 4;
|
|
|
|
for(int8_t i = (start + 3); i >= start; i--) {
|
|
parity_sum += (data >> i) & 1;
|
|
*encoded_data = (*encoded_data << 1) | ((data >> i) & 1);
|
|
}
|
|
|
|
*encoded_data = (*encoded_data << 1) | ((parity_sum % 2) & 1);
|
|
}
|
|
|
|
bool protocol_em4100_encoder_start(ProtocolEM4100* proto) {
|
|
// header
|
|
proto->encoded_data = 0b111111111;
|
|
|
|
// data
|
|
for(uint8_t i = 0; i < EM4100_DECODED_DATA_SIZE; i++) {
|
|
em4100_write_nibble(false, proto->data[i], &proto->encoded_data);
|
|
em4100_write_nibble(true, proto->data[i], &proto->encoded_data);
|
|
}
|
|
|
|
// column parity and stop bit
|
|
uint8_t parity_sum;
|
|
|
|
for(uint8_t c = 0; c < EM_COLUMN_COUNT; c++) {
|
|
parity_sum = 0;
|
|
for(uint8_t i = 1; i <= EM_ROW_COUNT; i++) {
|
|
uint8_t parity_bit = (proto->encoded_data >> (i * EM_BITS_PER_ROW_COUNT - 1)) & 1;
|
|
parity_sum += parity_bit;
|
|
}
|
|
proto->encoded_data = (proto->encoded_data << 1) | ((parity_sum % 2) & 1);
|
|
}
|
|
|
|
// stop bit
|
|
proto->encoded_data = (proto->encoded_data << 1) | 0;
|
|
|
|
proto->encoded_data_index = 0;
|
|
proto->encoded_polarity = true;
|
|
|
|
return true;
|
|
};
|
|
|
|
LevelDuration protocol_em4100_encoder_yield(ProtocolEM4100* proto) {
|
|
bool level = (proto->encoded_data >> (63 - proto->encoded_data_index)) & 1;
|
|
uint32_t duration = EM4100_CLOCK_PER_BIT / 2;
|
|
|
|
if(proto->encoded_polarity) {
|
|
proto->encoded_polarity = false;
|
|
} else {
|
|
level = !level;
|
|
|
|
proto->encoded_polarity = true;
|
|
proto->encoded_data_index++;
|
|
if(proto->encoded_data_index >= 64) {
|
|
proto->encoded_data_index = 0;
|
|
}
|
|
}
|
|
|
|
return level_duration_make(level, duration);
|
|
};
|
|
|
|
bool protocol_em4100_write_data(ProtocolEM4100* protocol, void* data) {
|
|
LFRFIDWriteRequest* request = (LFRFIDWriteRequest*)data;
|
|
bool result = false;
|
|
|
|
protocol_em4100_encoder_start(protocol);
|
|
|
|
if(request->write_type == LFRFIDWriteTypeT5577) {
|
|
request->t5577.block[0] =
|
|
(LFRFID_T5577_MODULATION_MANCHESTER | LFRFID_T5577_BITRATE_RF_64 |
|
|
(2 << LFRFID_T5577_MAXBLOCK_SHIFT));
|
|
request->t5577.block[1] = protocol->encoded_data;
|
|
request->t5577.block[2] = protocol->encoded_data >> 32;
|
|
request->t5577.blocks_to_write = 3;
|
|
result = true;
|
|
}
|
|
return result;
|
|
};
|
|
|
|
void protocol_em4100_render_data(ProtocolEM4100* protocol, string_t result) {
|
|
uint8_t* data = protocol->data;
|
|
string_printf(result, "FC: %03u, Card: %05u", data[2], (uint16_t)((data[3] << 8) | (data[4])));
|
|
};
|
|
|
|
const ProtocolBase protocol_em4100 = {
|
|
.name = "EM4100",
|
|
.manufacturer = "EM-Micro",
|
|
.data_size = EM4100_DECODED_DATA_SIZE,
|
|
.features = LFRFIDFeatureASK | LFRFIDFeaturePSK,
|
|
.validate_count = 3,
|
|
.alloc = (ProtocolAlloc)protocol_em4100_alloc,
|
|
.free = (ProtocolFree)protocol_em4100_free,
|
|
.get_data = (ProtocolGetData)protocol_em4100_get_data,
|
|
.decoder =
|
|
{
|
|
.start = (ProtocolDecoderStart)protocol_em4100_decoder_start,
|
|
.feed = (ProtocolDecoderFeed)protocol_em4100_decoder_feed,
|
|
},
|
|
.encoder =
|
|
{
|
|
.start = (ProtocolEncoderStart)protocol_em4100_encoder_start,
|
|
.yield = (ProtocolEncoderYield)protocol_em4100_encoder_yield,
|
|
},
|
|
.render_data = (ProtocolRenderData)protocol_em4100_render_data,
|
|
.render_brief_data = (ProtocolRenderData)protocol_em4100_render_data,
|
|
.write_data = (ProtocolWriteData)protocol_em4100_write_data,
|
|
}; |