iso14443_3a_poller.c


#include "iso14443_3a_poller_i.h"
 
#include <nfc/protocols/nfc_poller_base.h>
 
#include <furi.h>
 
#define TAG "ISO14443_3A"
 
const Iso14443_3aData* iso14443_3a_poller_get_data(Iso14443_3aPoller* instance) {
    furi_assert(instance);
    furi_assert(instance->data);
 
    return instance->data;
}
 
static Iso14443_3aPoller* iso14443_3a_poller_alloc(Nfc* nfc) {
    furi_assert(nfc);
 
    Iso14443_3aPoller* instance = malloc(sizeof(Iso14443_3aPoller));
    instance->nfc = nfc;
    instance->tx_buffer = bit_buffer_alloc(ISO14443_3A_POLLER_MAX_BUFFER_SIZE);
    instance->rx_buffer = bit_buffer_alloc(ISO14443_3A_POLLER_MAX_BUFFER_SIZE);
 
    nfc_config(instance->nfc, NfcModeIso14443_3aPoller);
    nfc_set_guard_time_us(instance->nfc, ISO14443_3A_GUARD_TIME_US);
    nfc_set_fdt_poll_fc(instance->nfc, ISO14443_3A_FDT_POLL_FC);
    nfc_set_fdt_poll_poll_us(instance->nfc, ISO14443_3A_POLL_POLL_MIN_US);
    instance->data = iso14443_3a_alloc();
 
    instance->iso14443_3a_event.data = &instance->iso14443_3a_event_data;
    instance->general_event.protocol = NfcProtocolIso14443_3a;
    instance->general_event.data = &instance->iso14443_3a_event;
    instance->general_event.instance = instance;
 
    return instance;
}
 
static void iso14443_3a_poller_free_new(Iso14443_3aPoller* iso14443_3a_poller) {
    furi_assert(iso14443_3a_poller);
 
    Iso14443_3aPoller* instance = iso14443_3a_poller;
    furi_assert(instance->tx_buffer);
    furi_assert(instance->rx_buffer);
    furi_assert(instance->data);
 
    bit_buffer_free(instance->tx_buffer);
    bit_buffer_free(instance->rx_buffer);
    iso14443_3a_free(instance->data);
    free(instance);
}
 
static void iso14443_3a_poller_set_callback(
    Iso14443_3aPoller* instance,
    NfcGenericCallback callback,
    void* context) {
    furi_assert(instance);
    furi_assert(callback);
 
    instance->callback = callback;
    instance->context = context;
}
 
static NfcCommand iso14443_3a_poller_run(NfcGenericEvent event, void* context) {
    furi_assert(context);
    furi_assert(event.protocol == NfcProtocolInvalid);
    furi_assert(event.data);
 
    Iso14443_3aPoller* instance = context;
    NfcEvent* nfc_event = event.data;
    NfcCommand command = NfcCommandContinue;
 
    if(nfc_event->type == NfcEventTypePollerReady) {
        if(instance->state != Iso14443_3aPollerStateActivated) {
            Iso14443_3aData data = {};
            Iso14443_3aError error = iso14443_3a_poller_async_activate(instance, &data);
            if(error == Iso14443_3aErrorNone) {
                instance->state = Iso14443_3aPollerStateActivated;
                instance->iso14443_3a_event.type = Iso14443_3aPollerEventTypeReady;
                instance->iso14443_3a_event_data.error = error;
                command = instance->callback(instance->general_event, instance->context);
            } else {
                instance->iso14443_3a_event.type = Iso14443_3aPollerEventTypeError;
                instance->iso14443_3a_event_data.error = error;
                command = instance->callback(instance->general_event, instance->context);
                // Add delay to switch context
                furi_delay_ms(100);
            }
        } else {
            instance->iso14443_3a_event.type = Iso14443_3aPollerEventTypeReady;
            instance->iso14443_3a_event_data.error = Iso14443_3aErrorNone;
            command = instance->callback(instance->general_event, instance->context);
        }
    }
 
    return command;
}
 
static bool iso14443_3a_poller_detect(NfcGenericEvent event, void* context) {
    furi_assert(context);
    furi_assert(event.data);
    furi_assert(event.instance);
    furi_assert(event.protocol = NfcProtocolInvalid);
 
    bool protocol_detected = false;
    Iso14443_3aPoller* instance = context;
    NfcEvent* nfc_event = event.data;
    furi_assert(instance->state == Iso14443_3aPollerStateIdle);
 
    if(nfc_event->type == NfcEventTypePollerReady) {
        Iso14443_3aError error = iso14443_3a_poller_async_activate(instance, NULL);
        protocol_detected = (error == Iso14443_3aErrorNone);
    }
 
    return protocol_detected;
}
 
const NfcPollerBase nfc_poller_iso14443_3a = {
    .alloc = (NfcPollerAlloc)iso14443_3a_poller_alloc,
    .free = (NfcPollerFree)iso14443_3a_poller_free_new,
    .set_callback = (NfcPollerSetCallback)iso14443_3a_poller_set_callback,
    .run = (NfcPollerRun)iso14443_3a_poller_run,
    .detect = (NfcPollerDetect)iso14443_3a_poller_detect,
    .get_data = (NfcPollerGetData)iso14443_3a_poller_get_data,
};
↑ V768 The expression 'event.protocol = NfcProtocolInvalid' is of enum type. It is odd that it is used as an expression of a Boolean-type.
↑ V559 Suspicious assignment inside the conditional expression of 'if' statement: event.protocol = NfcProtocolInvalid.