flipperzero-firmware/applications/lfrfid/helpers/rfid-reader.cpp
SG 4cb986b534
[FL-1904] LFRFID: dedicated reading modes (#823)
* LFRFID: dedicated reading modes
* LFRFID: normal and indala mode
2021-11-16 11:47:49 +03:00

187 lines
4.7 KiB
C++

#include "rfid-reader.h"
#include <furi.h>
#include <furi-hal.h>
#include <stm32wbxx_ll_cortex.h>
#include <tim.h>
extern COMP_HandleTypeDef hcomp1;
/**
* @brief private violation assistant for RfidReader
*/
struct RfidReaderAccessor {
static void decode(RfidReader& rfid_reader, bool polarity) {
rfid_reader.decode(polarity);
}
};
void RfidReader::decode(bool polarity) {
uint32_t current_dwt_value = DWT->CYCCNT;
uint32_t period = current_dwt_value - last_dwt_value;
last_dwt_value = current_dwt_value;
#ifdef RFID_GPIO_DEBUG
decoder_gpio_out.process_front(polarity, period);
#endif
switch(type) {
case Type::Normal:
decoder_em.process_front(polarity, period);
decoder_hid26.process_front(polarity, period);
break;
case Type::Indala:
decoder_em.process_front(polarity, period);
decoder_hid26.process_front(polarity, period);
decoder_indala.process_front(polarity, period);
break;
}
detect_ticks++;
}
bool RfidReader::switch_timer_elapsed() {
const uint32_t seconds_to_switch = osKernelGetTickFreq() * 2.0f;
return (osKernelGetTickCount() - switch_os_tick_last) > seconds_to_switch;
}
void RfidReader::switch_timer_reset() {
switch_os_tick_last = osKernelGetTickCount();
}
void RfidReader::switch_mode() {
switch(type) {
case Type::Normal:
type = Type::Indala;
furi_hal_rfid_change_read_config(62500.0f, 0.25f);
break;
case Type::Indala:
type = Type::Normal;
furi_hal_rfid_change_read_config(125000.0f, 0.5f);
break;
}
switch_timer_reset();
}
static void comparator_trigger_callback(void* hcomp, void* comp_ctx) {
COMP_HandleTypeDef* _hcomp = static_cast<COMP_HandleTypeDef*>(hcomp);
RfidReader* _this = static_cast<RfidReader*>(comp_ctx);
if(hcomp == &hcomp1) {
RfidReaderAccessor::decode(
*_this, (HAL_COMP_GetOutputLevel(_hcomp) == COMP_OUTPUT_LEVEL_HIGH));
}
}
RfidReader::RfidReader() {
}
void RfidReader::start() {
type = Type::Normal;
furi_hal_rfid_pins_read();
furi_hal_rfid_tim_read(125000, 0.5);
furi_hal_rfid_tim_read_start();
start_comparator();
switch_timer_reset();
last_readed_count = 0;
}
void RfidReader::start_forced(RfidReader::Type _type) {
start();
if(_type == Type::Indala) {
switch_mode();
}
}
void RfidReader::stop() {
furi_hal_rfid_pins_reset();
furi_hal_rfid_tim_read_stop();
furi_hal_rfid_tim_reset();
stop_comparator();
}
bool RfidReader::read(LfrfidKeyType* _type, uint8_t* data, uint8_t data_size, bool switch_enable) {
bool result = false;
bool something_readed = false;
// reading
if(decoder_em.read(data, data_size)) {
*_type = LfrfidKeyType::KeyEM4100;
something_readed = true;
}
if(decoder_hid26.read(data, data_size)) {
*_type = LfrfidKeyType::KeyH10301;
something_readed = true;
}
if(decoder_indala.read(data, data_size)) {
*_type = LfrfidKeyType::KeyI40134;
something_readed = true;
}
// validation
if(something_readed) {
switch_timer_reset();
if(last_readed_type == *_type && memcmp(last_readed_data, data, data_size) == 0) {
last_readed_count = last_readed_count + 1;
if(last_readed_count > 2) {
result = true;
}
} else {
last_readed_type = *_type;
memcpy(last_readed_data, data, data_size);
last_readed_count = 0;
}
}
// mode switching
if(switch_enable && switch_timer_elapsed()) {
switch_mode();
last_readed_count = 0;
}
return result;
}
bool RfidReader::detect() {
bool detected = false;
if(detect_ticks > 10) {
detected = true;
}
detect_ticks = 0;
return detected;
}
bool RfidReader::any_read() {
return last_readed_count > 0;
}
void RfidReader::start_comparator(void) {
api_interrupt_add(comparator_trigger_callback, InterruptTypeComparatorTrigger, this);
last_dwt_value = DWT->CYCCNT;
hcomp1.Init.InputMinus = COMP_INPUT_MINUS_1_2VREFINT;
hcomp1.Init.InputPlus = COMP_INPUT_PLUS_IO1;
hcomp1.Init.OutputPol = COMP_OUTPUTPOL_NONINVERTED;
hcomp1.Init.Hysteresis = COMP_HYSTERESIS_HIGH;
hcomp1.Init.BlankingSrce = COMP_BLANKINGSRC_NONE;
hcomp1.Init.Mode = COMP_POWERMODE_MEDIUMSPEED;
hcomp1.Init.WindowMode = COMP_WINDOWMODE_DISABLE;
hcomp1.Init.TriggerMode = COMP_TRIGGERMODE_IT_RISING_FALLING;
if(HAL_COMP_Init(&hcomp1) != HAL_OK) {
Error_Handler();
}
HAL_COMP_Start(&hcomp1);
}
void RfidReader::stop_comparator(void) {
HAL_COMP_Stop(&hcomp1);
api_interrupt_remove(comparator_trigger_callback, InterruptTypeComparatorTrigger);
}