mirror of
https://github.com/DarkFlippers/unleashed-firmware
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97 lines
2.8 KiB
C
97 lines
2.8 KiB
C
/**
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* @file nfc_scanner.h
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* @brief NFC card detection library.
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*
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* Once started, a NfcScanner instance will iterate over all available protocols
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* and return a list of one or more detected protocol identifiers via a user-provided callback.
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*
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* The NfcScanner behaviour is greedy, i.e. it will not stop scanning upon detection of
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* a just one protocol and will try others as well until all possibilities are exhausted.
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* This is to allow for multi-protocol card support.
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*
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* If no supported cards are in the vicinity, the scanning process will continue
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* until stopped explicitly.
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*/
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#pragma once
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#include <nfc/nfc.h>
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#include <nfc/protocols/nfc_protocol.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief NfcScanner opaque type definition.
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*/
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typedef struct NfcScanner NfcScanner;
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/**
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* @brief Event type passed to the user callback.
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*/
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typedef enum {
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NfcScannerEventTypeDetected, /**< One or more protocols have been detected. */
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} NfcScannerEventType;
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/**
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* @brief Event data passed to the user callback.
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*/
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typedef struct {
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size_t protocol_num; /**< Number of detected protocols (one or more). */
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NfcProtocol* protocols; /**< Pointer to the array of detected protocol identifiers. */
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} NfcScannerEventData;
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/**
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* @brief Event passed to the user callback.
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*/
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typedef struct {
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NfcScannerEventType type; /**< Type of event. Determines how the data must be handled. */
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NfcScannerEventData data; /**< Event-specific data. Handled accordingly to the even type. */
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} NfcScannerEvent;
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/**
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* @brief User callback function signature.
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*
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* A function with such signature must be provided by the user upon calling nfc_scanner_start().
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*
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* @param[in] event occurred event, complete with type and data.
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* @param[in] context pointer to the context data provided in nfc_scanner_start() call.
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*/
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typedef void (*NfcScannerCallback)(NfcScannerEvent event, void* context);
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/**
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* @brief Allocate an NfcScanner instance.
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*
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* @param[in] nfc pointer to an Nfc instance.
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* @returns pointer to the allocated NfcScanner instance.
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*
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* @see nfc.h
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*/
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NfcScanner* nfc_scanner_alloc(Nfc* nfc);
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/**
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* @brief Delete an NfcScanner instance.
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*
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* @param[in,out] instance pointer to the instance to be deleted.
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*/
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void nfc_scanner_free(NfcScanner* instance);
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/**
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* @brief Start an NfcScanner.
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*
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* @param[in,out] instance pointer to the instance to be started.
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* @param[in] callback pointer to the callback function (will be called upon a detection event).
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* @param[in] context pointer to the caller-specific context (will be passed to the callback).
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*/
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void nfc_scanner_start(NfcScanner* instance, NfcScannerCallback callback, void* context);
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/**
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* @brief Stop an NfcScanner.
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*
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* @param[in,out] instance pointer to the instance to be stopped.
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*/
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void nfc_scanner_stop(NfcScanner* instance);
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#ifdef __cplusplus
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}
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#endif
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