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[FL-1057] Low frequency RFID app [HID Encoder] (#445)

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* App Lfrfid: hid26 timer stage
* App Lfrfid: hid26 encoder
* fully removed old lf-rfid app
* fix codeowners
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SG 2021-05-05 17:50:19 +10:00 committed by GitHub
parent 46bc515c6a
commit 469e2dffec
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GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 127 additions and 76 deletions
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4
.github/CODEOWNERS vendored
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@ -78,6 +78,10 @@ lib/onewire/** @DrZlo13
applications/irda/** @DrZlo13
# LF-Rfid
applications/lf-rfid/** @DrZlo13
# Menu
applications/menu/** @skotopes

71
applications/lf-rfid-old/em4100.c
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@ -1,71 +0,0 @@
#include <furi.h>
#include <api-hal.h>
void prepare_data(uint32_t ID, uint32_t VENDOR, uint8_t* data) {
uint8_t value[10];
// vendor rows (4 bit in a row)
value[0] = (VENDOR >> 4) & 0xF;
value[1] = VENDOR & 0xF;
const uint8_t ROW_SIZE = 4;
const uint8_t HEADER_SIZE = 9;
// ID rows (4 bit in a row)
for(int i = 0; i < 8; i++) {
value[i + 2] = (ID >> (28 - i * ROW_SIZE)) & 0xF;
}
for(uint8_t i = 0; i < HEADER_SIZE; i++) {
data[i] = 1; // header
}
for(uint8_t i = 0; i < 10; i++) { // data
for(uint8_t j = 0; j < ROW_SIZE; j++) {
data[HEADER_SIZE + i * (ROW_SIZE + 1) + j] = (value[i] >> ((ROW_SIZE - 1) - j)) & 1;
}
// row parity
data[HEADER_SIZE + i * (ROW_SIZE + 1) + ROW_SIZE] =
(data[HEADER_SIZE + i * (ROW_SIZE + 1) + 0] +
data[HEADER_SIZE + i * (ROW_SIZE + 1) + 1] +
data[HEADER_SIZE + i * (ROW_SIZE + 1) + 2] +
data[HEADER_SIZE + i * (ROW_SIZE + 1) + 3]) %
2;
}
for(uint8_t i = 0; i < ROW_SIZE; i++) { //checksum
uint8_t checksum = 0;
for(uint8_t j = 0; j < 10; j++) {
checksum += data[HEADER_SIZE + i + j * (ROW_SIZE + 1)];
}
data[i + 59] = checksum % 2;
}
data[63] = 0; // stop bit
/*
printf("em data: ");
for(uint8_t i = 0; i < 64; i++) {
printf("%d ", data[i]);
}
printf("\r\n");
*/
}
void em4100_emulation(uint8_t* data, GpioPin* pin) {
taskENTER_CRITICAL();
hal_gpio_write(pin, true);
for(uint8_t i = 0; i < 8; i++) {
for(uint8_t j = 0; j < 64; j++) {
delay_us(260);
hal_gpio_write(pin, data[j]);
delay_us(260);
hal_gpio_write(pin, !data[j]);
}
}
hal_gpio_write(pin, false);
taskEXIT_CRITICAL();
}

118
applications/lf-rfid/helpers/encoder-hid.cpp
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@ -2,12 +2,124 @@
#include <furi.h>
void EncoderHID::init(const uint8_t* data, const uint8_t data_size) {
card_data = 0b1010000000000000000000000000000010011101111110011001001001010010;
furi_check(data_size == 3);
card_data[0] = 0;
card_data[1] = 0;
card_data[2] = 0;
uint32_t fc_cn = (data[0] << 16) | (data[1] << 8) | data[2];
// even parity sum calculation (high 12 bits of data)
uint8_t even_parity_sum = 0;
for(int8_t i = 12; i < 24; i++) {
if(((fc_cn >> i) & 1) == 1) {
even_parity_sum++;
}
}
// odd parity sum calculation (low 12 bits of data)
uint8_t odd_parity_sum = 1;
for(int8_t i = 0; i < 12; i++) {
if(((fc_cn >> i) & 1) == 1) {
odd_parity_sum++;
}
}
// 0x1D preamble
write_raw_bit(0, 0);
write_raw_bit(0, 1);
write_raw_bit(0, 2);
write_raw_bit(1, 3);
write_raw_bit(1, 4);
write_raw_bit(1, 5);
write_raw_bit(0, 6);
write_raw_bit(1, 7);
// company / OEM code 1
write_bit(0, 8);
write_bit(0, 10);
write_bit(0, 12);
write_bit(0, 14);
write_bit(0, 16);
write_bit(0, 18);
write_bit(1, 20);
// card format / length 1
write_bit(0, 22);
write_bit(0, 24);
write_bit(0, 26);
write_bit(0, 28);
write_bit(0, 30);
write_bit(0, 32);
write_bit(0, 34);
write_bit(0, 36);
write_bit(0, 38);
write_bit(0, 40);
write_bit(1, 42);
// even parity bit
write_bit((even_parity_sum % 2), 44);
// data
for(uint8_t i = 0; i < 24; i++) {
write_bit((fc_cn >> (23 - i)) & 1, 46 + (i * 2));
}
// odd parity bit
write_bit((odd_parity_sum % 2), 94);
card_data_index = 0;
bit_index = 0;
}
void EncoderHID::write_bit(bool bit, uint8_t position) {
write_raw_bit(bit, position + 0);
write_raw_bit(!bit, position + 1);
}
void EncoderHID::write_raw_bit(bool bit, uint8_t position) {
if(bit) {
card_data[position / 32] |= 1UL << (31 - (position % 32));
} else {
card_data[position / 32] &= ~(1UL << (31 - (position % 32)));
}
}
void EncoderHID::get_next(bool* polarity, uint16_t* period, uint16_t* pulse) {
*period = 100;
*pulse = 50;
// hid 0 is 6 cycles by 8 clocks
const uint8_t hid_0_period = 8;
const uint8_t hid_0_count = 6;
// hid 1 is 5 cycles by 10 clocks
const uint8_t hid_1_period = 10;
const uint8_t hid_1_count = 5;
bool bit = (card_data[card_data_index / 32] >> (31 - (card_data_index % 32))) & 1;
*polarity = true;
if(bit) {
*period = hid_1_period;
*pulse = hid_1_period / 2;
bit_index++;
if(bit_index >= hid_1_count) {
bit_index = 0;
card_data_index++;
if(card_data_index >= (32 * card_data_max)) {
card_data_index = 0;
}
}
} else {
*period = hid_0_period;
*pulse = hid_0_period / 2;
bit_index++;
if(bit_index >= hid_0_count) {
bit_index = 0;
card_data_index++;
if(card_data_index >= (32 * card_data_max)) {
card_data_index = 0;
}
}
}
}

7
applications/lf-rfid/helpers/encoder-hid.h
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@ -14,6 +14,11 @@ public:
void get_next(bool* polarity, uint16_t* period, uint16_t* pulse) final;
private:
uint64_t card_data;
static const uint8_t card_data_max = 3;
uint32_t card_data[card_data_max];
uint8_t card_data_index;
uint8_t bit_index;
void write_bit(bool bit, uint8_t position);
void write_raw_bit(bool bit, uint8_t position);
};

3
applications/lf-rfid/helpers/rfid-timer-emulator.cpp
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@ -341,13 +341,14 @@ void RfidTimerEmulator::start(Type type) {
if(encoders.count(type)) {
current_encoder = encoders.find(type)->second;
uint8_t em_data[5] = {0x53, 0x00, 0x5F, 0xB3, 0xC2};
uint8_t hid_data[3] = {0xED, 0x87, 0x70};
switch(type) {
case Type::EM:
current_encoder->init(em_data, 5);
break;
case Type::HID:
current_encoder->init(nullptr, 3);
current_encoder->init(hid_data, 3);
break;
case Type::Indala:
current_encoder->init(nullptr, 5);