unleashed-firmware/firmware/targets/f7/furi_hal/furi_hal_rfid.h

/**
 * @file furi_hal_rfid.h
 * RFID HAL API
 */

#pragma once

#include <stdint.h>
#include <stdbool.h>
#include <stddef.h>

#ifdef __cplusplus
extern "C" {
#endif

/** Initialize RFID subsystem
 */
void furi_hal_rfid_init();

/** Config rfid pins to reset state
 */
void furi_hal_rfid_pins_reset();

/** Release rfid pull pin
 */
void furi_hal_rfid_pin_pull_release();

/** Pulldown rfid pull pin
 */
void furi_hal_rfid_pin_pull_pulldown();

/** Start read timer
 * @param      freq        timer frequency
 * @param      duty_cycle  timer duty cycle, 0.0-1.0
 */
void furi_hal_rfid_tim_read_start(float freq, float duty_cycle);

/** Pause read timer, to be able to continue later
 */
void furi_hal_rfid_tim_read_pause();

/** Continue read timer
 */
void furi_hal_rfid_tim_read_continue();

/** Stop read timer
 */
void furi_hal_rfid_tim_read_stop();

typedef void (*FuriHalRfidReadCaptureCallback)(bool level, uint32_t duration, void* context);

void furi_hal_rfid_tim_read_capture_start(FuriHalRfidReadCaptureCallback callback, void* context);

void furi_hal_rfid_tim_read_capture_stop();

typedef void (*FuriHalRfidDMACallback)(bool half, void* context);

void furi_hal_rfid_tim_emulate_dma_start(
    uint32_t* duration,
    uint32_t* pulse,
    size_t length,
    FuriHalRfidDMACallback callback,
    void* context);

void furi_hal_rfid_tim_emulate_dma_stop();

/** Set read timer period
 *
 * @param      period  overall duration
 */
void furi_hal_rfid_set_read_period(uint32_t period);

/** Set read timer pulse
 *
 * @param      pulse  duration of high level
 */
void furi_hal_rfid_set_read_pulse(uint32_t pulse);

/** Start/Enable comparator */
void furi_hal_rfid_comp_start();

/** Stop/Disable comparator */
void furi_hal_rfid_comp_stop();

typedef void (*FuriHalRfidCompCallback)(bool level, void* context);

/** Set comparator callback */
void furi_hal_rfid_comp_set_callback(FuriHalRfidCompCallback callback, void* context);

/** Start/Enable Field Presence detect */
void furi_hal_rfid_field_detect_start();

/** Stop/Disable Field Presence detect */
void furi_hal_rfid_field_detect_stop();

/** Check Field Presence
 *
 * @param[out] frequency  pointer to frequency value to be set if filed detected
 *
 * @return     true if field is present, false if not
 */
bool furi_hal_rfid_field_is_present(uint32_t* frequency);

#ifdef __cplusplus
}
#endif