mirror of
https://github.com/DarkFlippers/unleashed-firmware
synced 2024-11-27 23:10:22 +00:00
0917494a80
* Separate ibutton to its own module, add one_wire to f18 * Move onewire cli to a separate app Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>
328 lines
9.9 KiB
C
328 lines
9.9 KiB
C
#include <furi.h>
|
|
#include <furi_hal.h>
|
|
|
|
#include "protocol_metakom.h"
|
|
|
|
#define METAKOM_DATA_SIZE sizeof(uint32_t)
|
|
#define METAKOM_PERIOD (125 * furi_hal_cortex_instructions_per_microsecond())
|
|
#define METAKOM_0_LOW (METAKOM_PERIOD * 0.33f)
|
|
#define METAKOM_0_HI (METAKOM_PERIOD * 0.66f)
|
|
#define METAKOM_1_LOW (METAKOM_PERIOD * 0.66f)
|
|
#define METAKOM_1_HI (METAKOM_PERIOD * 0.33f)
|
|
|
|
#define METAKOM_PERIOD_SAMPLE_COUNT 10
|
|
|
|
typedef enum {
|
|
METAKOM_WAIT_PERIOD_SYNC,
|
|
METAKOM_WAIT_START_BIT,
|
|
METAKOM_WAIT_START_WORD,
|
|
METAKOM_READ_WORD,
|
|
METAKOM_READ_STOP_WORD,
|
|
} MetakomState;
|
|
|
|
typedef enum {
|
|
METAKOM_BIT_WAIT_FRONT_HIGH,
|
|
METAKOM_BIT_WAIT_FRONT_LOW,
|
|
} MetakomBitState;
|
|
|
|
typedef struct {
|
|
// high + low period time
|
|
uint32_t period_time;
|
|
uint32_t low_time_storage;
|
|
uint8_t period_sample_index;
|
|
uint32_t period_sample_data[METAKOM_PERIOD_SAMPLE_COUNT];
|
|
|
|
uint8_t tmp_data;
|
|
uint8_t tmp_counter;
|
|
|
|
uint8_t key_data_index;
|
|
|
|
MetakomBitState bit_state;
|
|
MetakomState state;
|
|
} ProtocolMetakomDecoder;
|
|
|
|
typedef struct {
|
|
uint32_t index;
|
|
} ProtocolMetakomEncoder;
|
|
|
|
typedef struct {
|
|
uint32_t data;
|
|
|
|
ProtocolMetakomDecoder decoder;
|
|
ProtocolMetakomEncoder encoder;
|
|
} ProtocolMetakom;
|
|
|
|
static ProtocolMetakom* protocol_metakom_alloc(void) {
|
|
ProtocolMetakom* proto = malloc(sizeof(ProtocolMetakom));
|
|
return (void*)proto;
|
|
}
|
|
|
|
static void protocol_metakom_free(ProtocolMetakom* proto) {
|
|
free(proto);
|
|
}
|
|
|
|
static uint8_t* protocol_metakom_get_data(ProtocolMetakom* proto) {
|
|
return (uint8_t*)&proto->data;
|
|
}
|
|
|
|
static void protocol_metakom_decoder_start(ProtocolMetakom* proto) {
|
|
ProtocolMetakomDecoder* metakom = &proto->decoder;
|
|
|
|
metakom->period_sample_index = 0;
|
|
metakom->period_time = 0;
|
|
metakom->tmp_counter = 0;
|
|
metakom->tmp_data = 0;
|
|
for(uint8_t i = 0; i < METAKOM_PERIOD_SAMPLE_COUNT; i++) {
|
|
metakom->period_sample_data[i] = 0;
|
|
};
|
|
metakom->state = METAKOM_WAIT_PERIOD_SYNC;
|
|
metakom->bit_state = METAKOM_BIT_WAIT_FRONT_LOW;
|
|
metakom->key_data_index = 0;
|
|
metakom->low_time_storage = 0;
|
|
|
|
proto->data = 0;
|
|
}
|
|
|
|
static bool metakom_parity_check(uint8_t data) {
|
|
uint8_t ones_count = 0;
|
|
bool result;
|
|
|
|
for(uint8_t i = 0; i < 8; i++) {
|
|
if((data >> i) & 0b00000001) {
|
|
ones_count++;
|
|
}
|
|
}
|
|
|
|
result = (ones_count % 2 == 0);
|
|
|
|
return result;
|
|
}
|
|
|
|
static bool metakom_process_bit(
|
|
ProtocolMetakomDecoder* metakom,
|
|
bool polarity,
|
|
uint32_t time,
|
|
uint32_t* high_time,
|
|
uint32_t* low_time) {
|
|
bool result = false;
|
|
|
|
switch(metakom->bit_state) {
|
|
case METAKOM_BIT_WAIT_FRONT_LOW:
|
|
if(polarity == false) {
|
|
*low_time = metakom->low_time_storage;
|
|
*high_time = time;
|
|
result = true;
|
|
metakom->bit_state = METAKOM_BIT_WAIT_FRONT_HIGH;
|
|
}
|
|
break;
|
|
case METAKOM_BIT_WAIT_FRONT_HIGH:
|
|
if(polarity == true) {
|
|
metakom->low_time_storage = time;
|
|
metakom->bit_state = METAKOM_BIT_WAIT_FRONT_LOW;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static bool protocol_metakom_decoder_feed(ProtocolMetakom* proto, bool level, uint32_t duration) {
|
|
ProtocolMetakomDecoder* metakom = &proto->decoder;
|
|
|
|
bool ready = false;
|
|
|
|
uint32_t high_time = 0;
|
|
uint32_t low_time = 0;
|
|
|
|
switch(metakom->state) {
|
|
case METAKOM_WAIT_PERIOD_SYNC:
|
|
if(metakom_process_bit(metakom, level, duration, &high_time, &low_time)) {
|
|
metakom->period_sample_data[metakom->period_sample_index] = high_time + low_time;
|
|
metakom->period_sample_index++;
|
|
|
|
if(metakom->period_sample_index == METAKOM_PERIOD_SAMPLE_COUNT) {
|
|
for(uint8_t i = 0; i < METAKOM_PERIOD_SAMPLE_COUNT; i++) {
|
|
metakom->period_time += metakom->period_sample_data[i];
|
|
};
|
|
metakom->period_time /= METAKOM_PERIOD_SAMPLE_COUNT;
|
|
|
|
metakom->state = METAKOM_WAIT_START_BIT;
|
|
}
|
|
}
|
|
|
|
break;
|
|
case METAKOM_WAIT_START_BIT:
|
|
if(metakom_process_bit(metakom, level, duration, &high_time, &low_time)) {
|
|
metakom->tmp_counter++;
|
|
if(high_time > metakom->period_time) {
|
|
metakom->tmp_counter = 0;
|
|
metakom->state = METAKOM_WAIT_START_WORD;
|
|
}
|
|
|
|
if(metakom->tmp_counter > 40) {
|
|
protocol_metakom_decoder_start(proto);
|
|
}
|
|
}
|
|
|
|
break;
|
|
case METAKOM_WAIT_START_WORD:
|
|
if(metakom_process_bit(metakom, level, duration, &high_time, &low_time)) {
|
|
if(low_time < (metakom->period_time / 2)) {
|
|
metakom->tmp_data = (metakom->tmp_data << 1) | 0b0;
|
|
} else {
|
|
metakom->tmp_data = (metakom->tmp_data << 1) | 0b1;
|
|
}
|
|
metakom->tmp_counter++;
|
|
|
|
if(metakom->tmp_counter == 3) {
|
|
if(metakom->tmp_data == 0b010) {
|
|
metakom->tmp_counter = 0;
|
|
metakom->tmp_data = 0;
|
|
metakom->state = METAKOM_READ_WORD;
|
|
} else {
|
|
protocol_metakom_decoder_start(proto);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case METAKOM_READ_WORD:
|
|
if(metakom_process_bit(metakom, level, duration, &high_time, &low_time)) {
|
|
if(low_time < (metakom->period_time / 2)) {
|
|
metakom->tmp_data = (metakom->tmp_data << 1) | 0b0;
|
|
} else {
|
|
metakom->tmp_data = (metakom->tmp_data << 1) | 0b1;
|
|
}
|
|
metakom->tmp_counter++;
|
|
|
|
if(metakom->tmp_counter == 8) {
|
|
if(metakom_parity_check(metakom->tmp_data)) {
|
|
proto->data = (proto->data << 8) | metakom->tmp_data;
|
|
metakom->key_data_index++;
|
|
metakom->tmp_data = 0;
|
|
metakom->tmp_counter = 0;
|
|
|
|
if(metakom->key_data_index == 4) {
|
|
// check for stop bit
|
|
if(high_time > metakom->period_time) {
|
|
metakom->state = METAKOM_READ_STOP_WORD;
|
|
} else {
|
|
protocol_metakom_decoder_start(proto);
|
|
}
|
|
}
|
|
} else {
|
|
protocol_metakom_decoder_start(proto);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case METAKOM_READ_STOP_WORD:
|
|
if(metakom_process_bit(metakom, level, duration, &high_time, &low_time)) {
|
|
if(low_time < (metakom->period_time / 2)) {
|
|
metakom->tmp_data = (metakom->tmp_data << 1) | 0b0;
|
|
} else {
|
|
metakom->tmp_data = (metakom->tmp_data << 1) | 0b1;
|
|
}
|
|
metakom->tmp_counter++;
|
|
|
|
if(metakom->tmp_counter == 3) {
|
|
if(metakom->tmp_data == 0b010) {
|
|
ready = true;
|
|
} else {
|
|
protocol_metakom_decoder_start(proto);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
return ready;
|
|
}
|
|
|
|
static bool protocol_metakom_encoder_start(ProtocolMetakom* proto) {
|
|
proto->encoder.index = 0;
|
|
return true;
|
|
}
|
|
|
|
static LevelDuration protocol_metakom_encoder_yield(ProtocolMetakom* proto) {
|
|
LevelDuration result;
|
|
|
|
if(proto->encoder.index == 0) {
|
|
// sync bit
|
|
result = level_duration_make(false, METAKOM_PERIOD);
|
|
} else if(proto->encoder.index <= 6) {
|
|
// start word (0b010)
|
|
switch(proto->encoder.index) {
|
|
case 1:
|
|
result = level_duration_make(true, METAKOM_0_LOW); //-V1037
|
|
break;
|
|
case 2:
|
|
result = level_duration_make(false, METAKOM_0_HI); //-V1037
|
|
break;
|
|
case 3:
|
|
result = level_duration_make(true, METAKOM_1_LOW);
|
|
break;
|
|
case 4:
|
|
result = level_duration_make(false, METAKOM_1_HI);
|
|
break;
|
|
case 5:
|
|
result = level_duration_make(true, METAKOM_0_LOW);
|
|
break;
|
|
case 6:
|
|
result = level_duration_make(false, METAKOM_0_HI);
|
|
break;
|
|
}
|
|
} else {
|
|
// data
|
|
uint8_t data_start_index = proto->encoder.index - 7;
|
|
bool clock_polarity = (data_start_index) % 2;
|
|
uint8_t bit_index = (data_start_index) / 2;
|
|
bool bit_value = (proto->data >> (32 - 1 - bit_index)) & 1;
|
|
|
|
if(!clock_polarity) {
|
|
if(bit_value) {
|
|
result = level_duration_make(true, METAKOM_1_LOW);
|
|
} else {
|
|
result = level_duration_make(true, METAKOM_0_LOW);
|
|
}
|
|
} else {
|
|
if(bit_value) {
|
|
result = level_duration_make(false, METAKOM_1_HI);
|
|
} else {
|
|
result = level_duration_make(false, METAKOM_0_HI);
|
|
}
|
|
}
|
|
}
|
|
|
|
proto->encoder.index++;
|
|
if(proto->encoder.index >= (1 + 3 * 2 + 32 * 2)) {
|
|
proto->encoder.index = 0;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static void protocol_metakom_render_brief_data(ProtocolMetakom* proto, FuriString* result) {
|
|
for(size_t i = 0; i < METAKOM_DATA_SIZE; ++i) {
|
|
furi_string_cat_printf(result, "%02X ", ((uint8_t*)&proto->data)[i]);
|
|
}
|
|
}
|
|
|
|
const ProtocolBase ibutton_protocol_misc_metakom = {
|
|
.name = "Metakom",
|
|
.manufacturer = "Metakom",
|
|
.data_size = METAKOM_DATA_SIZE,
|
|
.alloc = (ProtocolAlloc)protocol_metakom_alloc,
|
|
.free = (ProtocolFree)protocol_metakom_free,
|
|
.get_data = (ProtocolGetData)protocol_metakom_get_data,
|
|
.decoder =
|
|
{
|
|
.start = (ProtocolDecoderStart)protocol_metakom_decoder_start,
|
|
.feed = (ProtocolDecoderFeed)protocol_metakom_decoder_feed,
|
|
},
|
|
.encoder =
|
|
{
|
|
.start = (ProtocolEncoderStart)protocol_metakom_encoder_start,
|
|
.yield = (ProtocolEncoderYield)protocol_metakom_encoder_yield,
|
|
},
|
|
.render_brief_data = (ProtocolRenderData)protocol_metakom_render_brief_data,
|
|
};
|