Add support for Pyramid tags (#1676)
* 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
GitHub
parent
611b7e15ed
commit
d76ba20652
@ -27,16 +27,16 @@
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#define LFRFID_WORKER_READ_DROP_TIME_MS 50
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#define LFRFID_WORKER_READ_STABILIZE_TIME_MS 450
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#define LFRFID_WORKER_READ_SWITCH_TIME_MS 1500
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#define LFRFID_WORKER_READ_SWITCH_TIME_MS 2000
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#define LFRFID_WORKER_WRITE_VERIFY_TIME_MS 1500
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#define LFRFID_WORKER_WRITE_VERIFY_TIME_MS 2000
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#define LFRFID_WORKER_WRITE_DROP_TIME_MS 50
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#define LFRFID_WORKER_WRITE_TOO_LONG_TIME_MS 10000
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#define LFRFID_WORKER_WRITE_MAX_UNSUCCESSFUL_READS 5
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#define LFRFID_WORKER_READ_BUFFER_SIZE 512
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#define LFRFID_WORKER_READ_BUFFER_COUNT 8
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#define LFRFID_WORKER_READ_BUFFER_COUNT 16
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#define LFRFID_WORKER_EMULATE_BUFFER_SIZE 1024
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@ -132,6 +132,8 @@ static LFRFIDWorkerReadState lfrfid_worker_read_internal(
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#ifdef LFRFID_WORKER_READ_DEBUG_GPIO
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furi_hal_gpio_init_simple(LFRFID_WORKER_READ_DEBUG_GPIO_VALUE, GpioModeOutputPushPull);
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furi_hal_gpio_init_simple(LFRFID_WORKER_READ_DEBUG_GPIO_LOAD, GpioModeOutputPushPull);
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furi_hal_gpio_write(LFRFID_WORKER_READ_DEBUG_GPIO_VALUE, false);
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furi_hal_gpio_write(LFRFID_WORKER_READ_DEBUG_GPIO_LOAD, false);
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#endif
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LFRFIDWorkerReadContext ctx;
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@ -171,10 +173,16 @@ static LFRFIDWorkerReadState lfrfid_worker_read_internal(
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if(buffer_stream_get_overrun_count(ctx.stream) > 0) {
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FURI_LOG_E(TAG, "Read overrun, recovering");
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buffer_stream_reset(ctx.stream);
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#ifdef LFRFID_WORKER_READ_DEBUG_GPIO
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furi_hal_gpio_write(LFRFID_WORKER_READ_DEBUG_GPIO_LOAD, false);
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#endif
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continue;
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}
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if(buffer == NULL) {
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#ifdef LFRFID_WORKER_READ_DEBUG_GPIO
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furi_hal_gpio_write(LFRFID_WORKER_READ_DEBUG_GPIO_LOAD, false);
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#endif
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continue;
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}
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@ -261,24 +269,26 @@ static LFRFIDWorkerReadState lfrfid_worker_read_internal(
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last_read_count = 0;
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}
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string_t string_info;
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string_init(string_info);
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for(uint8_t i = 0; i < protocol_data_size; i++) {
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if(i != 0) {
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string_cat_printf(string_info, " ");
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if(furi_log_get_level() >= FuriLogLevelDebug) {
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string_t string_info;
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string_init(string_info);
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for(uint8_t i = 0; i < protocol_data_size; i++) {
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if(i != 0) {
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string_cat_printf(string_info, " ");
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}
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string_cat_printf(string_info, "%02X", protocol_data[i]);
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}
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string_cat_printf(string_info, "%02X", protocol_data[i]);
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FURI_LOG_D(
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TAG,
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"%s, %d, [%s]",
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protocol_dict_get_name(worker->protocols, protocol),
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last_read_count,
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string_get_cstr(string_info));
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string_clear(string_info);
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}
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FURI_LOG_D(
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TAG,
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"%s, %d, [%s]",
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protocol_dict_get_name(worker->protocols, protocol),
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last_read_count,
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string_get_cstr(string_info));
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string_clear(string_info);
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protocol_dict_decoders_start(worker->protocols);
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}
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}
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@ -321,6 +331,8 @@ static LFRFIDWorkerReadState lfrfid_worker_read_internal(
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free(last_data);
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#ifdef LFRFID_WORKER_READ_DEBUG_GPIO
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furi_hal_gpio_write(LFRFID_WORKER_READ_DEBUG_GPIO_VALUE, false);
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furi_hal_gpio_write(LFRFID_WORKER_READ_DEBUG_GPIO_LOAD, false);
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furi_hal_gpio_init_simple(LFRFID_WORKER_READ_DEBUG_GPIO_VALUE, GpioModeAnalog);
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furi_hal_gpio_init_simple(LFRFID_WORKER_READ_DEBUG_GPIO_LOAD, GpioModeAnalog);
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#endif
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@ -8,6 +8,7 @@
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#include "protocol_fdx_b.h"
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#include "protocol_hid_generic.h"
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#include "protocol_hid_ex_generic.h"
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#include "protocol_pyramid.h"
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#include "protocol_viking.h"
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#include "protocol_jablotron.h"
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#include "protocol_paradox.h"
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@ -23,6 +24,7 @@ const ProtocolBase* lfrfid_protocols[] = {
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[LFRFIDProtocolFDXB] = &protocol_fdx_b,
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[LFRFIDProtocolHidGeneric] = &protocol_hid_generic,
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[LFRFIDProtocolHidExGeneric] = &protocol_hid_ex_generic,
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[LFRFIDProtocolPyramid] = &protocol_pyramid,
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[LFRFIDProtocolViking] = &protocol_viking,
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[LFRFIDProtocolJablotron] = &protocol_jablotron,
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[LFRFIDProtocolParadox] = &protocol_paradox,
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@ -17,6 +17,7 @@ typedef enum {
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LFRFIDProtocolFDXB,
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LFRFIDProtocolHidGeneric,
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LFRFIDProtocolHidExGeneric,
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LFRFIDProtocolPyramid,
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LFRFIDProtocolViking,
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LFRFIDProtocolJablotron,
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LFRFIDProtocolParadox,
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@ -53,7 +53,7 @@ void protocol_awid_decoder_start(ProtocolAwid* protocol) {
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memset(protocol->encoded_data, 0, AWID_ENCODED_DATA_SIZE);
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};
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static bool protocol_awid_can_be_decoded(const uint8_t* data) {
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static bool protocol_awid_can_be_decoded(uint8_t* data) {
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bool result = false;
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// Index map
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@ -77,6 +77,12 @@ static bool protocol_awid_can_be_decoded(const uint8_t* data) {
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bool parity_error = bit_lib_test_parity(data, 8, 88, BitLibParityOdd, 4);
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if(parity_error) break;
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bit_lib_remove_bit_every_nth(data, 8, 88, 4);
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// Avoid detection for invalid formats
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uint8_t len = bit_lib_get_bits(data, 8, 8);
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if(len != 26 && len != 50 && len != 37 && len != 34) break;
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result = true;
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} while(false);
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@ -84,7 +90,6 @@ static bool protocol_awid_can_be_decoded(const uint8_t* data) {
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}
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static void protocol_awid_decode(uint8_t* encoded_data, uint8_t* decoded_data) {
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bit_lib_remove_bit_every_nth(encoded_data, 8, 88, 4);
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bit_lib_copy_bits(decoded_data, 0, 66, encoded_data, 8);
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}
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@ -264,7 +264,7 @@ bool protocol_em4100_write_data(ProtocolEM4100* protocol, void* data) {
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void protocol_em4100_render_data(ProtocolEM4100* protocol, string_t result) {
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uint8_t* data = protocol->data;
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string_printf(result, "ID: %03u,%05u", data[2], (uint16_t)((data[3] << 8) | (data[4])));
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string_printf(result, "FC: %03u, Card: %05u", data[2], (uint16_t)((data[3] << 8) | (data[4])));
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};
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const ProtocolBase protocol_em4100 = {
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@ -162,12 +162,7 @@ LevelDuration protocol_jablotron_encoder_yield(ProtocolJablotron* protocol) {
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void protocol_jablotron_render_data(ProtocolJablotron* protocol, string_t result) {
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uint64_t id = protocol_jablotron_card_id(protocol->data);
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string_printf(result, "ID: %llx\r\n", id);
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};
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void protocol_jablotron_render_brief_data(ProtocolJablotron* protocol, string_t result) {
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uint64_t id = protocol_jablotron_card_id(protocol->data);
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string_printf(result, "ID: %llx\r\n", id);
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string_printf(result, "ID: %llX\r\n", id);
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};
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bool protocol_jablotron_write_data(ProtocolJablotron* protocol, void* data) {
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@ -207,6 +202,6 @@ const ProtocolBase protocol_jablotron = {
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.yield = (ProtocolEncoderYield)protocol_jablotron_encoder_yield,
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},
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.render_data = (ProtocolRenderData)protocol_jablotron_render_data,
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.render_brief_data = (ProtocolRenderData)protocol_jablotron_render_brief_data,
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.render_brief_data = (ProtocolRenderData)protocol_jablotron_render_data,
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.write_data = (ProtocolWriteData)protocol_jablotron_write_data,
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};
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@ -155,7 +155,7 @@ void protocol_paradox_render_brief_data(ProtocolParadox* protocol, string_t resu
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uint8_t fc = bit_lib_get_bits(decoded_data, 10, 8);
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uint16_t card_id = bit_lib_get_bits_16(decoded_data, 18, 16);
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string_cat_printf(result, "ID: %03u,%05u", fc, card_id);
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string_cat_printf(result, "FC: %03u, Card: %05u", fc, card_id);
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};
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bool protocol_paradox_write_data(ProtocolParadox* protocol, void* data) {
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277
lib/lfrfid/protocols/protocol_pyramid.c
Normal file
277
lib/lfrfid/protocols/protocol_pyramid.c
Normal file
@ -0,0 +1,277 @@
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#include <furi.h>
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#include <toolbox/protocols/protocol.h>
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#include <lfrfid/tools/fsk_demod.h>
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#include <lfrfid/tools/fsk_osc.h>
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#include "lfrfid_protocols.h"
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#include <lfrfid/tools/bit_lib.h>
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#define JITTER_TIME (20)
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#define MIN_TIME (64 - JITTER_TIME)
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#define MAX_TIME (80 + JITTER_TIME)
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#define PYRAMID_DATA_SIZE 13
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#define PYRAMID_PREAMBLE_SIZE 3
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#define PYRAMID_ENCODED_DATA_SIZE \
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(PYRAMID_PREAMBLE_SIZE + PYRAMID_DATA_SIZE + PYRAMID_PREAMBLE_SIZE)
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#define PYRAMID_ENCODED_BIT_SIZE ((PYRAMID_PREAMBLE_SIZE + PYRAMID_DATA_SIZE) * 8)
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#define PYRAMID_DECODED_DATA_SIZE (4)
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#define PYRAMID_DECODED_BIT_SIZE ((PYRAMID_ENCODED_BIT_SIZE - PYRAMID_PREAMBLE_SIZE * 8) / 2)
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typedef struct {
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FSKDemod* fsk_demod;
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} ProtocolPyramidDecoder;
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typedef struct {
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FSKOsc* fsk_osc;
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uint8_t encoded_index;
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uint32_t pulse;
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} ProtocolPyramidEncoder;
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typedef struct {
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ProtocolPyramidDecoder decoder;
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ProtocolPyramidEncoder encoder;
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uint8_t encoded_data[PYRAMID_ENCODED_DATA_SIZE];
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uint8_t data[PYRAMID_DECODED_DATA_SIZE];
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} ProtocolPyramid;
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ProtocolPyramid* protocol_pyramid_alloc(void) {
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ProtocolPyramid* protocol = malloc(sizeof(ProtocolPyramid));
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protocol->decoder.fsk_demod = fsk_demod_alloc(MIN_TIME, 6, MAX_TIME, 5);
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protocol->encoder.fsk_osc = fsk_osc_alloc(8, 10, 50);
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return protocol;
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};
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void protocol_pyramid_free(ProtocolPyramid* protocol) {
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fsk_demod_free(protocol->decoder.fsk_demod);
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fsk_osc_free(protocol->encoder.fsk_osc);
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free(protocol);
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};
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uint8_t* protocol_pyramid_get_data(ProtocolPyramid* protocol) {
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return protocol->data;
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};
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void protocol_pyramid_decoder_start(ProtocolPyramid* protocol) {
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memset(protocol->encoded_data, 0, PYRAMID_ENCODED_DATA_SIZE);
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};
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static bool protocol_pyramid_can_be_decoded(uint8_t* data) {
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// check preamble
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if(bit_lib_get_bits_16(data, 0, 16) != 0b0000000000000001 ||
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bit_lib_get_bits(data, 16, 8) != 0b00000001) {
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return false;
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}
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if(bit_lib_get_bits_16(data, 128, 16) != 0b0000000000000001 ||
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bit_lib_get_bits(data, 136, 8) != 0b00000001) {
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return false;
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}
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uint8_t checksum = bit_lib_get_bits(data, 120, 8);
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uint8_t checksum_data[13] = {0x00};
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for(uint8_t i = 0; i < 13; i++) {
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checksum_data[i] = bit_lib_get_bits(data, 16 + (i * 8), 8);
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}
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uint8_t calc_checksum = bit_lib_crc8(checksum_data, 13, 0x31, 0x00, true, true, 0x00);
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if(checksum != calc_checksum) return false;
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// Remove parity
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bit_lib_remove_bit_every_nth(data, 8, 15 * 8, 8);
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// Determine Startbit and format
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int j;
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for(j = 0; j < 105; ++j) {
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if(bit_lib_get_bit(data, j)) break;
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}
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uint8_t fmt_len = 105 - j;
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// Only suppport 26bit format for now
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if(fmt_len != 26) return false;
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return true;
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}
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static void protocol_pyramid_decode(ProtocolPyramid* protocol) {
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// Format
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bit_lib_set_bits(protocol->data, 0, 26, 8);
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// Facility Code
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bit_lib_copy_bits(protocol->data, 8, 8, protocol->encoded_data, 73 + 8);
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// Card Number
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bit_lib_copy_bits(protocol->data, 16, 16, protocol->encoded_data, 81 + 8);
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}
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bool protocol_pyramid_decoder_feed(ProtocolPyramid* protocol, bool level, uint32_t duration) {
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bool value;
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uint32_t count;
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bool result = false;
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fsk_demod_feed(protocol->decoder.fsk_demod, level, duration, &value, &count);
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if(count > 0) {
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for(size_t i = 0; i < count; i++) {
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bit_lib_push_bit(protocol->encoded_data, PYRAMID_ENCODED_DATA_SIZE, value);
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if(protocol_pyramid_can_be_decoded(protocol->encoded_data)) {
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protocol_pyramid_decode(protocol);
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result = true;
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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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bool protocol_pyramid_get_parity(const uint8_t* bits, uint8_t type, int length) {
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int x;
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for(x = 0; length > 0; --length) x += bit_lib_get_bit(bits, length - 1);
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x %= 2;
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return x ^ type;
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}
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void protocol_pyramid_add_wiegand_parity(
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uint8_t* target,
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uint8_t target_position,
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uint8_t* source,
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uint8_t length) {
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bit_lib_set_bit(
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target, target_position, protocol_pyramid_get_parity(source, 0 /* even */, length / 2));
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bit_lib_copy_bits(target, target_position + 1, length, source, 0);
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bit_lib_set_bit(
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target,
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target_position + length + 1,
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protocol_pyramid_get_parity(source + length / 2, 1 /* odd */, length / 2));
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}
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static void protocol_pyramid_encode(ProtocolPyramid* protocol) {
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memset(protocol->encoded_data, 0, sizeof(protocol->encoded_data));
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uint8_t pre[16];
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memset(pre, 0, sizeof(pre));
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// Format start bit
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bit_lib_set_bit(pre, 79, 1);
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uint8_t wiegand[3];
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memset(wiegand, 0, sizeof(wiegand));
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// FC
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bit_lib_copy_bits(wiegand, 0, 8, protocol->data, 8);
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// CardNum
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bit_lib_copy_bits(wiegand, 8, 16, protocol->data, 16);
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// Wiegand parity
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protocol_pyramid_add_wiegand_parity(pre, 80, wiegand, 24);
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bit_lib_add_parity(pre, 8, protocol->encoded_data, 8, 102, 8, 1);
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// Add checksum
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uint8_t checksum_buffer[13];
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for(uint8_t i = 0; i < 13; i++)
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checksum_buffer[i] = bit_lib_get_bits(protocol->encoded_data, 16 + (i * 8), 8);
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uint8_t crc = bit_lib_crc8(checksum_buffer, 13, 0x31, 0x00, true, true, 0x00);
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bit_lib_set_bits(protocol->encoded_data, 120, crc, 8);
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}
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bool protocol_pyramid_encoder_start(ProtocolPyramid* protocol) {
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protocol->encoder.encoded_index = 0;
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protocol->encoder.pulse = 0;
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protocol_pyramid_encode(protocol);
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return true;
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};
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LevelDuration protocol_pyramid_encoder_yield(ProtocolPyramid* protocol) {
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bool level = 0;
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uint32_t duration = 0;
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// if pulse is zero, we need to output high, otherwise we need to output low
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if(protocol->encoder.pulse == 0) {
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// get bit
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uint8_t bit = bit_lib_get_bit(protocol->encoded_data, protocol->encoder.encoded_index);
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// get pulse from oscillator
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bool advance = fsk_osc_next(protocol->encoder.fsk_osc, bit, &duration);
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if(advance) {
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bit_lib_increment_index(protocol->encoder.encoded_index, PYRAMID_ENCODED_BIT_SIZE);
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}
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|
||||
// 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
4
lib/lfrfid/protocols/protocol_pyramid.h
Normal file
@ -0,0 +1,4 @@
|
||||
#pragma once
|
||||
#include <toolbox/protocols/protocol.h>
|
||||
|
||||
extern const ProtocolBase protocol_pyramid;
|
||||
@ -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 = {
|
||||
|
||||
@ -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,
|
||||
|
||||
@ -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
|
||||
*
|
||||
|
||||
Loading…
Reference in New Issue
Block a user