22e1ecb642
* Hal lfrfid: add read timer pulse and period config fns * New debug application for lfrfid subsystem * New lfrfid: app, fix naming * App lfrfid: assets * Container view module * App ibutton: remove unused header * App lfrfid scenes * App notification, add yield to blocking operations, add speaker volume control * App lfrfid: reading key scene * Assets: placeholder icon * App lfrfid: reworked container view module * App lfrfid: new scenes * App lfrfid: write scene * App lfrfid: write hid * App lfrfid: emulate scene * App lfrfid: save name scene * App lfrfid: add missing file
99 lines
2.6 KiB
C++
99 lines
2.6 KiB
C++
#include "decoder-hid26.h"
|
|
#include <api-hal.h>
|
|
|
|
constexpr uint32_t clocks_in_us = 64;
|
|
|
|
constexpr uint32_t jitter_time_us = 20;
|
|
constexpr uint32_t min_time_us = 64;
|
|
constexpr uint32_t max_time_us = 80;
|
|
|
|
constexpr uint32_t min_time = (min_time_us - jitter_time_us) * clocks_in_us;
|
|
constexpr uint32_t mid_time = ((max_time_us - min_time_us) / 2 + min_time_us) * clocks_in_us;
|
|
constexpr uint32_t max_time = (max_time_us + jitter_time_us) * clocks_in_us;
|
|
|
|
bool DecoderHID26::read(uint8_t* data, uint8_t data_size) {
|
|
bool result = false;
|
|
furi_assert(data_size >= 3);
|
|
|
|
if(ready) {
|
|
result = true;
|
|
hid.decode(
|
|
reinterpret_cast<const uint8_t*>(&stored_data), sizeof(uint32_t) * 3, data, data_size);
|
|
ready = false;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
void DecoderHID26::process_front(bool polarity, uint32_t time) {
|
|
if(ready) return;
|
|
|
|
if(polarity == true) {
|
|
last_pulse_time = time;
|
|
} else {
|
|
last_pulse_time += time;
|
|
|
|
if(last_pulse_time > min_time && last_pulse_time < max_time) {
|
|
bool pulse;
|
|
|
|
if(last_pulse_time < mid_time) {
|
|
// 6 pulses
|
|
pulse = false;
|
|
} else {
|
|
// 5 pulses
|
|
pulse = true;
|
|
}
|
|
|
|
if(last_pulse == pulse) {
|
|
pulse_count++;
|
|
|
|
if(pulse) {
|
|
if(pulse_count > 4) {
|
|
pulse_count = 0;
|
|
store_data(1);
|
|
}
|
|
} else {
|
|
if(pulse_count > 5) {
|
|
pulse_count = 0;
|
|
store_data(0);
|
|
}
|
|
}
|
|
} else {
|
|
if(last_pulse) {
|
|
if(pulse_count > 2) {
|
|
store_data(1);
|
|
}
|
|
} else {
|
|
if(pulse_count > 3) {
|
|
store_data(0);
|
|
}
|
|
}
|
|
|
|
pulse_count = 0;
|
|
last_pulse = pulse;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
DecoderHID26::DecoderHID26() {
|
|
reset_state();
|
|
}
|
|
|
|
void DecoderHID26::store_data(bool data) {
|
|
stored_data[0] = (stored_data[0] << 1) | ((stored_data[1] >> 31) & 1);
|
|
stored_data[1] = (stored_data[1] << 1) | ((stored_data[2] >> 31) & 1);
|
|
stored_data[2] = (stored_data[2] << 1) | data;
|
|
|
|
if(hid.can_be_decoded(reinterpret_cast<const uint8_t*>(&stored_data), sizeof(uint32_t) * 3)) {
|
|
ready = true;
|
|
}
|
|
}
|
|
|
|
void DecoderHID26::reset_state() {
|
|
last_pulse = false;
|
|
pulse_count = 0;
|
|
ready = false;
|
|
last_pulse_time = 0;
|
|
}
|