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#include "furi-hal-nfc.h"
#include <st25r3916.h>
#define TAG "FuriHalNfc"
static const uint32_t clocks_in_ms = 64 * 1000;
void furi_hal_nfc_init() {
ReturnCode ret = rfalNfcInitialize();
if(ret == ERR_NONE) {
furi_hal_nfc_start_sleep();
FURI_LOG_I(TAG, "Init OK");
} else {
FURI_LOG_W(TAG, "Initialization failed, RFAL returned: %d", ret);
}
}
bool furi_hal_nfc_is_busy() {
return rfalNfcGetState() != RFAL_NFC_STATE_IDLE;
}
void furi_hal_nfc_field_on() {
furi_hal_nfc_exit_sleep();
st25r3916TxRxOn();
}
void furi_hal_nfc_field_off() {
st25r3916TxRxOff();
furi_hal_nfc_start_sleep();
}
void furi_hal_nfc_start_sleep() {
rfalLowPowerModeStart();
}
void furi_hal_nfc_exit_sleep() {
rfalLowPowerModeStop();
}
bool furi_hal_nfc_detect(rfalNfcDevice **dev_list, uint8_t* dev_cnt, uint32_t timeout, bool deactivate) {
furi_assert(dev_list);
furi_assert(dev_cnt);
rfalLowPowerModeStop();
rfalNfcState state = rfalNfcGetState();
if(state == RFAL_NFC_STATE_NOTINIT) {
rfalNfcInitialize();
}
rfalNfcDiscoverParam params;
params.compMode = RFAL_COMPLIANCE_MODE_EMV;
params.techs2Find = RFAL_NFC_POLL_TECH_A | RFAL_NFC_POLL_TECH_B | RFAL_NFC_POLL_TECH_F |
RFAL_NFC_POLL_TECH_V | RFAL_NFC_POLL_TECH_AP2P | RFAL_NFC_POLL_TECH_ST25TB;
params.totalDuration = 1000;
params.devLimit = 3;
params.wakeupEnabled = false;
params.wakeupConfigDefault = true;
params.nfcfBR = RFAL_BR_212;
params.ap2pBR = RFAL_BR_424;
params.maxBR = RFAL_BR_KEEP;
params.GBLen = RFAL_NFCDEP_GB_MAX_LEN;
params.notifyCb = NULL;
uint32_t start = DWT->CYCCNT;
rfalNfcDiscover(¶ms);
while(state != RFAL_NFC_STATE_ACTIVATED) {
rfalNfcWorker();
state = rfalNfcGetState();
FURI_LOG_D(TAG, "Current state %d", state);
if(state == RFAL_NFC_STATE_POLL_ACTIVATION) {
start = DWT->CYCCNT;
continue;
}
if(state == RFAL_NFC_STATE_POLL_SELECT) {
rfalNfcSelect(0);
}
if(DWT->CYCCNT - start > timeout * clocks_in_ms) {
rfalNfcDeactivate(true);
FURI_LOG_D(TAG, "Timeout");
return false;
}
osThreadYield();
}
rfalNfcGetDevicesFound(dev_list, dev_cnt);
if(deactivate) {
rfalNfcDeactivate(false);
rfalLowPowerModeStart();
}
return true;
}
bool furi_hal_nfc_listen(uint8_t* uid, uint8_t uid_len, uint8_t* atqa, uint8_t sak, bool activate_after_sak, uint32_t timeout) {
rfalNfcState state = rfalNfcGetState();
if(state == RFAL_NFC_STATE_NOTINIT) {
rfalNfcInitialize();
} else if(state >= RFAL_NFC_STATE_ACTIVATED) {
rfalNfcDeactivate(false);
}
rfalLowPowerModeStop();
rfalNfcDiscoverParam params = {
.compMode = RFAL_COMPLIANCE_MODE_NFC,
.techs2Find = RFAL_NFC_LISTEN_TECH_A,
.totalDuration = 1000,
.devLimit = 1,
.wakeupEnabled = false,
.wakeupConfigDefault = true,
.nfcfBR = RFAL_BR_212,
.ap2pBR = RFAL_BR_424,
.maxBR = RFAL_BR_KEEP,
.GBLen = RFAL_NFCDEP_GB_MAX_LEN,
.notifyCb = NULL,
.activate_after_sak = activate_after_sak,
};
params.lmConfigPA.nfcidLen = uid_len;
memcpy(params.lmConfigPA.nfcid, uid, uid_len);
params.lmConfigPA.SENS_RES[0] = atqa[0];
params.lmConfigPA.SENS_RES[1] = atqa[1];
params.lmConfigPA.SEL_RES = sak;
rfalNfcDiscover(¶ms);
uint32_t start = DWT->CYCCNT;
while(state != RFAL_NFC_STATE_ACTIVATED) {
rfalNfcWorker();
state = rfalNfcGetState();
if(DWT->CYCCNT - start > timeout * clocks_in_ms) {
rfalNfcDeactivate(true);
return false;
}
osThreadYield();
}
return true;
}
bool furi_hal_nfc_get_first_frame(uint8_t** rx_buff, uint16_t** rx_len) {
ReturnCode ret = rfalNfcDataExchangeStart(NULL, 0, rx_buff, rx_len, 0);
return ret == ERR_NONE;
}
ReturnCode furi_hal_nfc_data_exchange(uint8_t* tx_buff, uint16_t tx_len, uint8_t** rx_buff, uint16_t** rx_len, bool deactivate) {
furi_assert(rx_buff);
furi_assert(rx_len);
ReturnCode ret;
rfalNfcState state = RFAL_NFC_STATE_ACTIVATED;
ret = rfalNfcDataExchangeStart(tx_buff, tx_len, rx_buff, rx_len, 0);
if(ret != ERR_NONE) {
return ret;
}
uint32_t start = DWT->CYCCNT;
while(state != RFAL_NFC_STATE_DATAEXCHANGE_DONE) {
rfalNfcWorker();
state = rfalNfcGetState();
ret = rfalNfcDataExchangeGetStatus();
if(ret > ERR_SLEEP_REQ) {
return ret;
}
if(ret == ERR_BUSY) {
if(DWT->CYCCNT - start > 1000 * clocks_in_ms) {
return ERR_TIMEOUT;
}
continue;
} else {
start = DWT->CYCCNT;
}
taskYIELD();
}
if(deactivate) {
rfalNfcDeactivate(false);
rfalLowPowerModeStart();
}
return ERR_NONE;
}
void furi_hal_nfc_deactivate() {
rfalNfcDeactivate(false);
rfalLowPowerModeStart();
}
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