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Add support for Pyramid tags (#1676)

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* 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>
This commit is contained in:
Sebastian Mauer 2022-08-29 17:31:28 +01:00 committed by GitHub
parent 611b7e15ed
commit d76ba20652
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
12 changed files with 438 additions and 29 deletions
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46
lib/lfrfid/lfrfid_worker_modes.c
View File

@ -27,16 +27,16 @@
#define LFRFID_WORKER_READ_DROP_TIME_MS 50
#define LFRFID_WORKER_READ_STABILIZE_TIME_MS 450
#define LFRFID_WORKER_READ_SWITCH_TIME_MS 1500
#define LFRFID_WORKER_READ_SWITCH_TIME_MS 2000
#define LFRFID_WORKER_WRITE_VERIFY_TIME_MS 1500
#define LFRFID_WORKER_WRITE_VERIFY_TIME_MS 2000
#define LFRFID_WORKER_WRITE_DROP_TIME_MS 50
#define LFRFID_WORKER_WRITE_TOO_LONG_TIME_MS 10000
#define LFRFID_WORKER_WRITE_MAX_UNSUCCESSFUL_READS 5
#define LFRFID_WORKER_READ_BUFFER_SIZE 512
#define LFRFID_WORKER_READ_BUFFER_COUNT 8
#define LFRFID_WORKER_READ_BUFFER_COUNT 16
#define LFRFID_WORKER_EMULATE_BUFFER_SIZE 1024
@ -132,6 +132,8 @@ static LFRFIDWorkerReadState lfrfid_worker_read_internal(
#ifdef LFRFID_WORKER_READ_DEBUG_GPIO
furi_hal_gpio_init_simple(LFRFID_WORKER_READ_DEBUG_GPIO_VALUE, GpioModeOutputPushPull);
furi_hal_gpio_init_simple(LFRFID_WORKER_READ_DEBUG_GPIO_LOAD, GpioModeOutputPushPull);
furi_hal_gpio_write(LFRFID_WORKER_READ_DEBUG_GPIO_VALUE, false);
furi_hal_gpio_write(LFRFID_WORKER_READ_DEBUG_GPIO_LOAD, false);
#endif
LFRFIDWorkerReadContext ctx;
@ -171,10 +173,16 @@ static LFRFIDWorkerReadState lfrfid_worker_read_internal(
if(buffer_stream_get_overrun_count(ctx.stream) > 0) {
FURI_LOG_E(TAG, "Read overrun, recovering");
buffer_stream_reset(ctx.stream);
#ifdef LFRFID_WORKER_READ_DEBUG_GPIO
furi_hal_gpio_write(LFRFID_WORKER_READ_DEBUG_GPIO_LOAD, false);
#endif
continue;
}
if(buffer == NULL) {
#ifdef LFRFID_WORKER_READ_DEBUG_GPIO
furi_hal_gpio_write(LFRFID_WORKER_READ_DEBUG_GPIO_LOAD, false);
#endif
continue;
}
@ -261,24 +269,26 @@ static LFRFIDWorkerReadState lfrfid_worker_read_internal(
last_read_count = 0;
}
string_t string_info;
string_init(string_info);
for(uint8_t i = 0; i < protocol_data_size; i++) {
if(i != 0) {
string_cat_printf(string_info, " ");
if(furi_log_get_level() >= FuriLogLevelDebug) {
string_t string_info;
string_init(string_info);
for(uint8_t i = 0; i < protocol_data_size; i++) {
if(i != 0) {
string_cat_printf(string_info, " ");
}
string_cat_printf(string_info, "%02X", protocol_data[i]);
}
string_cat_printf(string_info, "%02X", protocol_data[i]);
FURI_LOG_D(
TAG,
"%s, %d, [%s]",
protocol_dict_get_name(worker->protocols, protocol),
last_read_count,
string_get_cstr(string_info));
string_clear(string_info);
}
FURI_LOG_D(
TAG,
"%s, %d, [%s]",
protocol_dict_get_name(worker->protocols, protocol),
last_read_count,
string_get_cstr(string_info));
string_clear(string_info);
protocol_dict_decoders_start(worker->protocols);
}
}
@ -321,6 +331,8 @@ static LFRFIDWorkerReadState lfrfid_worker_read_internal(
free(last_data);
#ifdef LFRFID_WORKER_READ_DEBUG_GPIO
furi_hal_gpio_write(LFRFID_WORKER_READ_DEBUG_GPIO_VALUE, false);
furi_hal_gpio_write(LFRFID_WORKER_READ_DEBUG_GPIO_LOAD, false);
furi_hal_gpio_init_simple(LFRFID_WORKER_READ_DEBUG_GPIO_VALUE, GpioModeAnalog);
furi_hal_gpio_init_simple(LFRFID_WORKER_READ_DEBUG_GPIO_LOAD, GpioModeAnalog);
#endif

2
lib/lfrfid/protocols/lfrfid_protocols.c
View File

@ -8,6 +8,7 @@
#include "protocol_fdx_b.h"
#include "protocol_hid_generic.h"
#include "protocol_hid_ex_generic.h"
#include "protocol_pyramid.h"
#include "protocol_viking.h"
#include "protocol_jablotron.h"
#include "protocol_paradox.h"
@ -23,6 +24,7 @@ const ProtocolBase* lfrfid_protocols[] = {
[LFRFIDProtocolFDXB] = &protocol_fdx_b,
[LFRFIDProtocolHidGeneric] = &protocol_hid_generic,
[LFRFIDProtocolHidExGeneric] = &protocol_hid_ex_generic,
[LFRFIDProtocolPyramid] = &protocol_pyramid,
[LFRFIDProtocolViking] = &protocol_viking,
[LFRFIDProtocolJablotron] = &protocol_jablotron,
[LFRFIDProtocolParadox] = &protocol_paradox,

1
lib/lfrfid/protocols/lfrfid_protocols.h
View File

@ -17,6 +17,7 @@ typedef enum {
LFRFIDProtocolFDXB,
LFRFIDProtocolHidGeneric,
LFRFIDProtocolHidExGeneric,
LFRFIDProtocolPyramid,
LFRFIDProtocolViking,
LFRFIDProtocolJablotron,
LFRFIDProtocolParadox,

9
lib/lfrfid/protocols/protocol_awid.c
View File

@ -53,7 +53,7 @@ void protocol_awid_decoder_start(ProtocolAwid* protocol) {
memset(protocol->encoded_data, 0, AWID_ENCODED_DATA_SIZE);
};
static bool protocol_awid_can_be_decoded(const uint8_t* data) {
static bool protocol_awid_can_be_decoded(uint8_t* data) {
bool result = false;
// Index map
@ -77,6 +77,12 @@ static bool protocol_awid_can_be_decoded(const uint8_t* data) {
bool parity_error = bit_lib_test_parity(data, 8, 88, BitLibParityOdd, 4);
if(parity_error) break;
bit_lib_remove_bit_every_nth(data, 8, 88, 4);
// Avoid detection for invalid formats
uint8_t len = bit_lib_get_bits(data, 8, 8);
if(len != 26 && len != 50 && len != 37 && len != 34) break;
result = true;
} while(false);
@ -84,7 +90,6 @@ static bool protocol_awid_can_be_decoded(const uint8_t* data) {
}
static void protocol_awid_decode(uint8_t* encoded_data, uint8_t* decoded_data) {
bit_lib_remove_bit_every_nth(encoded_data, 8, 88, 4);
bit_lib_copy_bits(decoded_data, 0, 66, encoded_data, 8);
}

2
lib/lfrfid/protocols/protocol_em4100.c
View File

@ -264,7 +264,7 @@ bool protocol_em4100_write_data(ProtocolEM4100* protocol, void* data) {
void protocol_em4100_render_data(ProtocolEM4100* protocol, string_t result) {
uint8_t* data = protocol->data;
string_printf(result, "ID: %03u,%05u", data[2], (uint16_t)((data[3] << 8) | (data[4])));
string_printf(result, "FC: %03u, Card: %05u", data[2], (uint16_t)((data[3] << 8) | (data[4])));
};
const ProtocolBase protocol_em4100 = {

9
lib/lfrfid/protocols/protocol_jablotron.c
View File

@ -162,12 +162,7 @@ LevelDuration protocol_jablotron_encoder_yield(ProtocolJablotron* protocol) {
void protocol_jablotron_render_data(ProtocolJablotron* protocol, string_t result) {
uint64_t id = protocol_jablotron_card_id(protocol->data);
string_printf(result, "ID: %llx\r\n", id);
};
void protocol_jablotron_render_brief_data(ProtocolJablotron* protocol, string_t result) {
uint64_t id = protocol_jablotron_card_id(protocol->data);
string_printf(result, "ID: %llx\r\n", id);
string_printf(result, "ID: %llX\r\n", id);
};
bool protocol_jablotron_write_data(ProtocolJablotron* protocol, void* data) {
@ -207,6 +202,6 @@ const ProtocolBase protocol_jablotron = {
.yield = (ProtocolEncoderYield)protocol_jablotron_encoder_yield,
},
.render_data = (ProtocolRenderData)protocol_jablotron_render_data,
.render_brief_data = (ProtocolRenderData)protocol_jablotron_render_brief_data,
.render_brief_data = (ProtocolRenderData)protocol_jablotron_render_data,
.write_data = (ProtocolWriteData)protocol_jablotron_write_data,
};

2
lib/lfrfid/protocols/protocol_paradox.c
View File

@ -155,7 +155,7 @@ void protocol_paradox_render_brief_data(ProtocolParadox* protocol, string_t resu
uint8_t fc = bit_lib_get_bits(decoded_data, 10, 8);
uint16_t card_id = bit_lib_get_bits_16(decoded_data, 18, 16);
string_cat_printf(result, "ID: %03u,%05u", fc, card_id);
string_cat_printf(result, "FC: %03u, Card: %05u", fc, card_id);
};
bool protocol_paradox_write_data(ProtocolParadox* protocol, void* data) {

277
lib/lfrfid/protocols/protocol_pyramid.c Normal file
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@ -0,0 +1,277 @@
#include <furi.h>
#include <toolbox/protocols/protocol.h>
#include <lfrfid/tools/fsk_demod.h>
#include <lfrfid/tools/fsk_osc.h>
#include "lfrfid_protocols.h"
#include <lfrfid/tools/bit_lib.h>
#define JITTER_TIME (20)
#define MIN_TIME (64 - JITTER_TIME)
#define MAX_TIME (80 + JITTER_TIME)
#define PYRAMID_DATA_SIZE 13
#define PYRAMID_PREAMBLE_SIZE 3
#define PYRAMID_ENCODED_DATA_SIZE \
(PYRAMID_PREAMBLE_SIZE + PYRAMID_DATA_SIZE + PYRAMID_PREAMBLE_SIZE)
#define PYRAMID_ENCODED_BIT_SIZE ((PYRAMID_PREAMBLE_SIZE + PYRAMID_DATA_SIZE) * 8)
#define PYRAMID_DECODED_DATA_SIZE (4)
#define PYRAMID_DECODED_BIT_SIZE ((PYRAMID_ENCODED_BIT_SIZE - PYRAMID_PREAMBLE_SIZE * 8) / 2)
typedef struct {
FSKDemod* fsk_demod;
} ProtocolPyramidDecoder;
typedef struct {
FSKOsc* fsk_osc;
uint8_t encoded_index;
uint32_t pulse;
} ProtocolPyramidEncoder;
typedef struct {
ProtocolPyramidDecoder decoder;
ProtocolPyramidEncoder encoder;
uint8_t encoded_data[PYRAMID_ENCODED_DATA_SIZE];
uint8_t data[PYRAMID_DECODED_DATA_SIZE];
} ProtocolPyramid;
ProtocolPyramid* protocol_pyramid_alloc(void) {
ProtocolPyramid* protocol = malloc(sizeof(ProtocolPyramid));
protocol->decoder.fsk_demod = fsk_demod_alloc(MIN_TIME, 6, MAX_TIME, 5);
protocol->encoder.fsk_osc = fsk_osc_alloc(8, 10, 50);
return protocol;
};
void protocol_pyramid_free(ProtocolPyramid* protocol) {
fsk_demod_free(protocol->decoder.fsk_demod);
fsk_osc_free(protocol->encoder.fsk_osc);
free(protocol);
};
uint8_t* protocol_pyramid_get_data(ProtocolPyramid* protocol) {
return protocol->data;
};
void protocol_pyramid_decoder_start(ProtocolPyramid* protocol) {
memset(protocol->encoded_data, 0, PYRAMID_ENCODED_DATA_SIZE);
};
static bool protocol_pyramid_can_be_decoded(uint8_t* data) {
// check preamble
if(bit_lib_get_bits_16(data, 0, 16) != 0b0000000000000001 ||
bit_lib_get_bits(data, 16, 8) != 0b00000001) {
return false;
}
if(bit_lib_get_bits_16(data, 128, 16) != 0b0000000000000001 ||
bit_lib_get_bits(data, 136, 8) != 0b00000001) {
return false;
}
uint8_t checksum = bit_lib_get_bits(data, 120, 8);
uint8_t checksum_data[13] = {0x00};
for(uint8_t i = 0; i < 13; i++) {
checksum_data[i] = bit_lib_get_bits(data, 16 + (i * 8), 8);
}
uint8_t calc_checksum = bit_lib_crc8(checksum_data, 13, 0x31, 0x00, true, true, 0x00);
if(checksum != calc_checksum) return false;
// Remove parity
bit_lib_remove_bit_every_nth(data, 8, 15 * 8, 8);
// Determine Startbit and format
int j;
for(j = 0; j < 105; ++j) {
if(bit_lib_get_bit(data, j)) break;
}
uint8_t fmt_len = 105 - j;
// Only suppport 26bit format for now
if(fmt_len != 26) return false;
return true;
}
static void protocol_pyramid_decode(ProtocolPyramid* protocol) {
// Format
bit_lib_set_bits(protocol->data, 0, 26, 8);
// Facility Code
bit_lib_copy_bits(protocol->data, 8, 8, protocol->encoded_data, 73 + 8);
// Card Number
bit_lib_copy_bits(protocol->data, 16, 16, protocol->encoded_data, 81 + 8);
}
bool protocol_pyramid_decoder_feed(ProtocolPyramid* protocol, bool level, uint32_t duration) {
bool value;
uint32_t count;
bool result = false;
fsk_demod_feed(protocol->decoder.fsk_demod, level, duration, &value, &count);
if(count > 0) {
for(size_t i = 0; i < count; i++) {
bit_lib_push_bit(protocol->encoded_data, PYRAMID_ENCODED_DATA_SIZE, value);
if(protocol_pyramid_can_be_decoded(protocol->encoded_data)) {
protocol_pyramid_decode(protocol);
result = true;
}
}
}
return result;
};
bool protocol_pyramid_get_parity(const uint8_t* bits, uint8_t type, int length) {
int x;
for(x = 0; length > 0; --length) x += bit_lib_get_bit(bits, length - 1);
x %= 2;
return x ^ type;
}
void protocol_pyramid_add_wiegand_parity(
uint8_t* target,
uint8_t target_position,
uint8_t* source,
uint8_t length) {
bit_lib_set_bit(
target, target_position, protocol_pyramid_get_parity(source, 0 /* even */, length / 2));
bit_lib_copy_bits(target, target_position + 1, length, source, 0);
bit_lib_set_bit(
target,
target_position + length + 1,
protocol_pyramid_get_parity(source + length / 2, 1 /* odd */, length / 2));
}
static void protocol_pyramid_encode(ProtocolPyramid* protocol) {
memset(protocol->encoded_data, 0, sizeof(protocol->encoded_data));
uint8_t pre[16];
memset(pre, 0, sizeof(pre));
// Format start bit
bit_lib_set_bit(pre, 79, 1);
uint8_t wiegand[3];
memset(wiegand, 0, sizeof(wiegand));
// FC
bit_lib_copy_bits(wiegand, 0, 8, protocol->data, 8);
// CardNum
bit_lib_copy_bits(wiegand, 8, 16, protocol->data, 16);
// Wiegand parity
protocol_pyramid_add_wiegand_parity(pre, 80, wiegand, 24);
bit_lib_add_parity(pre, 8, protocol->encoded_data, 8, 102, 8, 1);
// Add checksum
uint8_t checksum_buffer[13];
for(uint8_t i = 0; i < 13; i++)
checksum_buffer[i] = bit_lib_get_bits(protocol->encoded_data, 16 + (i * 8), 8);
uint8_t crc = bit_lib_crc8(checksum_buffer, 13, 0x31, 0x00, true, true, 0x00);
bit_lib_set_bits(protocol->encoded_data, 120, crc, 8);
}
bool protocol_pyramid_encoder_start(ProtocolPyramid* protocol) {
protocol->encoder.encoded_index = 0;
protocol->encoder.pulse = 0;
protocol_pyramid_encode(protocol);
return true;
};
LevelDuration protocol_pyramid_encoder_yield(ProtocolPyramid* protocol) {
bool level = 0;
uint32_t duration = 0;
// if pulse is zero, we need to output high, otherwise we need to output low
if(protocol->encoder.pulse == 0) {
// get bit
uint8_t bit = bit_lib_get_bit(protocol->encoded_data, protocol->encoder.encoded_index);
// get pulse from oscillator
bool advance = fsk_osc_next(protocol->encoder.fsk_osc, bit, &duration);
if(advance) {
bit_lib_increment_index(protocol->encoder.encoded_index, PYRAMID_ENCODED_BIT_SIZE);
}
// duration diveded by 2 because we need to output high and low
duration = duration / 2;
protocol->encoder.pulse = duration;
level = true;
} else {
// output low half and reset pulse
duration = protocol->encoder.pulse;
protocol->encoder.pulse = 0;
level = false;
}
return level_duration_make(level, duration);
};
bool protocol_pyramid_write_data(ProtocolPyramid* protocol, void* data) {
LFRFIDWriteRequest* request = (LFRFIDWriteRequest*)data;
bool result = false;
protocol_pyramid_encoder_start(protocol);
if(request->write_type == LFRFIDWriteTypeT5577) {
request->t5577.block[0] = LFRFID_T5577_MODULATION_FSK2a | LFRFID_T5577_BITRATE_RF_50 |
(4 << LFRFID_T5577_MAXBLOCK_SHIFT);
request->t5577.block[1] = bit_lib_get_bits_32(protocol->encoded_data, 0, 32);
request->t5577.block[2] = bit_lib_get_bits_32(protocol->encoded_data, 32, 32);
request->t5577.block[3] = bit_lib_get_bits_32(protocol->encoded_data, 64, 32);
request->t5577.block[4] = bit_lib_get_bits_32(protocol->encoded_data, 96, 32);
request->t5577.blocks_to_write = 5;
result = true;
}
return result;
};
void protocol_pyramid_render_data(ProtocolPyramid* protocol, string_t result) {
uint8_t* decoded_data = protocol->data;
uint8_t format_length = decoded_data[0];
string_cat_printf(result, "Format: 26\r\n", format_length);
if(format_length == 26) {
uint8_t facility;
bit_lib_copy_bits(&facility, 0, 8, decoded_data, 8);
uint16_t card_id;
bit_lib_copy_bits((uint8_t*)&card_id, 8, 8, decoded_data, 16);
bit_lib_copy_bits((uint8_t*)&card_id, 0, 8, decoded_data, 24);
string_cat_printf(result, "FC: %03u, Card: %05u", facility, card_id);
} else {
string_cat_printf(result, "Data: unknown");
}
};
const ProtocolBase protocol_pyramid = {
.name = "Pyramid",
.manufacturer = "Farpointe",
.data_size = PYRAMID_DECODED_DATA_SIZE,
.features = LFRFIDFeatureASK,
.validate_count = 3,
.alloc = (ProtocolAlloc)protocol_pyramid_alloc,
.free = (ProtocolFree)protocol_pyramid_free,
.get_data = (ProtocolGetData)protocol_pyramid_get_data,
.decoder =
{
.start = (ProtocolDecoderStart)protocol_pyramid_decoder_start,
.feed = (ProtocolDecoderFeed)protocol_pyramid_decoder_feed,
},
.encoder =
{
.start = (ProtocolEncoderStart)protocol_pyramid_encoder_start,
.yield = (ProtocolEncoderYield)protocol_pyramid_encoder_yield,
},
.render_data = (ProtocolRenderData)protocol_pyramid_render_data,
.render_brief_data = (ProtocolRenderData)protocol_pyramid_render_data,
.write_data = (ProtocolWriteData)protocol_pyramid_write_data,
};

4
lib/lfrfid/protocols/protocol_pyramid.h Normal file
View File

@ -0,0 +1,4 @@
#pragma once
#include <toolbox/protocols/protocol.h>
extern const ProtocolBase protocol_pyramid;

2
lib/lfrfid/protocols/protocol_viking.c
View File

@ -173,7 +173,7 @@ bool protocol_viking_write_data(ProtocolViking* protocol, void* data) {
void protocol_viking_render_data(ProtocolViking* protocol, string_t result) {
uint32_t id = bit_lib_get_bits_32(protocol->data, 0, 32);
string_printf(result, "ID: %08lx\r\n", id);
string_printf(result, "ID: %08lX\r\n", id);
};
const ProtocolBase protocol_viking = {

69
lib/lfrfid/tools/bit_lib.c
View File

@ -129,6 +129,45 @@ bool bit_lib_test_parity(
return result;
}
size_t bit_lib_add_parity(
const uint8_t* data,
size_t position,
uint8_t* dest,
size_t dest_position,
uint8_t source_length,
uint8_t parity_length,
BitLibParity parity) {
uint32_t parity_word = 0;
size_t j = 0, bit_count = 0;
for(int word = 0; word < source_length; word += parity_length - 1) {
for(int bit = 0; bit < parity_length - 1; bit++) {
parity_word = (parity_word << 1) | bit_lib_get_bit(data, position + word + bit);
bit_lib_set_bit(
dest, dest_position + j++, bit_lib_get_bit(data, position + word + bit));
}
// if parity fails then return 0
switch(parity) {
case BitLibParityAlways0:
bit_lib_set_bit(dest, dest_position + j++, 0);
break; // marker bit which should be a 0
case BitLibParityAlways1:
bit_lib_set_bit(dest, dest_position + j++, 1);
break; // marker bit which should be a 1
default:
bit_lib_set_bit(
dest,
dest_position + j++,
(bit_lib_test_parity_32(parity_word, BitLibParityOdd) ^ parity) ^ 1);
break;
}
bit_count += parity_length;
parity_word = 0;
}
// if we got here then all the parities passed
// return bit count
return bit_count;
}
size_t bit_lib_remove_bit_every_nth(uint8_t* data, size_t position, uint8_t length, uint8_t n) {
size_t counter = 0;
size_t result_counter = 0;
@ -269,6 +308,36 @@ uint8_t bit_lib_reverse_8_fast(uint8_t byte) {
return byte;
}
uint16_t bit_lib_crc8(
uint8_t const* data,
size_t data_size,
uint8_t polynom,
uint8_t init,
bool ref_in,
bool ref_out,
uint8_t xor_out) {
uint8_t crc = init;
for(size_t i = 0; i < data_size; ++i) {
uint8_t byte = data[i];
if(ref_in) bit_lib_reverse_bits(&byte, 0, 8);
crc ^= byte;
for(size_t j = 8; j > 0; --j) {
if(crc & TOPBIT(8)) {
crc = (crc << 1) ^ polynom;
} else {
crc = (crc << 1);
}
}
}
if(ref_out) bit_lib_reverse_bits(&crc, 0, 8);
crc ^= xor_out;
return crc;
}
uint16_t bit_lib_crc16(
uint8_t const* data,
size_t data_size,

44
lib/lfrfid/tools/bit_lib.h
View File

@ -7,6 +7,8 @@
extern "C" {
#endif
#define TOPBIT(X) (1 << (X - 1))
typedef enum {
BitLibParityEven,
BitLibParityOdd,
@ -114,6 +116,27 @@ bool bit_lib_test_parity(
BitLibParity parity,
uint8_t parity_length);
/**
* @brief Add parity to bit array
*
* @param data Source bit array
* @param position Start position
* @param dest Destination bit array
* @param dest_position Destination position
* @param source_length Source bit count
* @param parity_length Parity block length
* @param parity Parity to test against
* @return size_t
*/
size_t bit_lib_add_parity(
const uint8_t* data,
size_t position,
uint8_t* dest,
size_t dest_position,
uint8_t source_length,
uint8_t parity_length,
BitLibParity parity);
/**
* @brief Remove bit every n in array and shift array left. Useful to remove parity.
*
@ -202,6 +225,27 @@ uint16_t bit_lib_reverse_16_fast(uint16_t data);
*/
uint8_t bit_lib_reverse_8_fast(uint8_t byte);
/**
* @brief Slow, but generic CRC8 implementation
*
* @param data
* @param data_size
* @param polynom CRC polynom
* @param init init value
* @param ref_in true if the right bit is older
* @param ref_out true to reverse output
* @param xor_out xor output with this value
* @return uint8_t
*/
uint16_t bit_lib_crc8(
uint8_t const* data,
size_t data_size,
uint8_t polynom,
uint8_t init,
bool ref_in,
bool ref_out,
uint8_t xor_out);
/**
* @brief Slow, but generic CRC16 implementation
*