/******************************************************************************
* \attention
*
* <h2><center>© COPYRIGHT 2020 STMicroelectronics</center></h2>
*
* Licensed under ST MYLIBERTY SOFTWARE LICENSE AGREEMENT (the "License");
* You may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* www.st.com/myliberty
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied,
* AND SPECIFICALLY DISCLAIMING THE IMPLIED WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/*
* PROJECT: ST25R3916 firmware
* Revision:
* LANGUAGE: ISO C99
*/
/*! \file
*
* \author Gustavo Patricio
*
* \brief RF Abstraction Layer (RFAL)
*
* RFAL implementation for ST25R3916
*/
/*
******************************************************************************
* INCLUDES
******************************************************************************
*/
#include "rfal_chip.h"
#include "utils.h"
#include "st25r3916.h"
#include "st25r3916_com.h"
#include "st25r3916_irq.h"
#include "rfal_analogConfig.h"
#include "rfal_iso15693_2.h"
#include "rfal_crc.h"
/*
******************************************************************************
* ENABLE SWITCHS
******************************************************************************
*/
#ifndef RFAL_FEATURE_LISTEN_MODE
#define RFAL_FEATURE_LISTEN_MODE false /* Listen Mode configuration missing. Disabled by default */
#endif /* RFAL_FEATURE_LISTEN_MODE */
#ifndef RFAL_FEATURE_WAKEUP_MODE
#define RFAL_FEATURE_WAKEUP_MODE \
false /* Wake-Up mode configuration missing. Disabled by default */
#endif /* RFAL_FEATURE_WAKEUP_MODE */
#ifndef RFAL_FEATURE_LOWPOWER_MODE
#define RFAL_FEATURE_LOWPOWER_MODE \
false /* Low Power mode configuration missing. Disabled by default */
#endif /* RFAL_FEATURE_LOWPOWER_MODE */
/*
******************************************************************************
* GLOBAL TYPES
******************************************************************************
*/
/*! Struct that holds all involved on a Transceive including the context passed by the caller */
typedef struct {
rfalTransceiveState state; /*!< Current transceive state */
rfalTransceiveState lastState; /*!< Last transceive state (debug purposes) */
ReturnCode status; /*!< Current status/error of the transceive */
rfalTransceiveContext ctx; /*!< The transceive context given by the caller */
} rfalTxRx;
/*! Struct that holds all context for the Listen Mode */
typedef struct {
rfalLmState state; /*!< Current Listen Mode state */
uint32_t mdMask; /*!< Listen Mode mask used */
uint32_t mdReg; /*!< Listen Mode register value used */
uint32_t mdIrqs; /*!< Listen Mode IRQs used */
rfalBitRate brDetected; /*!< Last bit rate detected */
uint8_t* rxBuf; /*!< Location to store incoming data in Listen Mode */
uint16_t rxBufLen; /*!< Length of rxBuf */
uint16_t* rxLen; /*!< Pointer to write the data length placed into rxBuf */
bool dataFlag; /*!< Listen Mode current Data Flag */
bool iniFlag; /*!< Listen Mode initialized Flag (FeliCa slots) */
} rfalLm;
/*! Struct that holds all context for the Wake-Up Mode */
typedef struct {
rfalWumState state; /*!< Current Wake-Up Mode state */
rfalWakeUpConfig cfg; /*!< Current Wake-Up Mode context */
} rfalWum;
/*! Struct that holds all context for the Low Power Mode */
typedef struct {
bool isRunning;
} rfalLpm;
/*! Struct that holds the timings GT and FDTs */
typedef struct {
uint32_t GT; /*!< GT in 1/fc */
uint32_t FDTListen; /*!< FDTListen in 1/fc */
uint32_t FDTPoll; /*!< FDTPoll in 1/fc */
uint8_t nTRFW; /*!< n*TRFW used during RF CA */
} rfalTimings;
/*! Struct that holds the software timers */
typedef struct {
uint32_t GT; /*!< RFAL's GT timer */
uint32_t RXE; /*!< Timer between RXS and RXE */
uint32_t txRx; /*!< Transceive sanity timer */
} rfalTimers;
/*! Struct that holds the RFAL's callbacks */
typedef struct {
rfalPreTxRxCallback preTxRx; /*!< RFAL's Pre TxRx callback */
rfalPostTxRxCallback postTxRx; /*!< RFAL's Post TxRx callback */
RfalStateChangedCallback state_changed_cb;
void* ctx;
} rfalCallbacks;
/*! Struct that holds counters to control the FIFO on Tx and Rx */
typedef struct {
uint16_t
expWL; /*!< The amount of bytes expected to be Tx when a WL interrupt occours */
uint16_t
bytesTotal; /*!< Total bytes to be transmitted OR the total bytes received */
uint16_t
bytesWritten; /*!< Amount of bytes already written on FIFO (Tx) OR read (RX) from FIFO and written on rxBuffer*/
uint8_t status
[ST25R3916_FIFO_STATUS_LEN]; /*!< FIFO Status Registers */
} rfalFIFO;
/*! Struct that holds RFAL's configuration settings */
typedef struct {
uint8_t obsvModeTx; /*!< RFAL's config of the ST25R3916's observation mode while Tx */
uint8_t obsvModeRx; /*!< RFAL's config of the ST25R3916's observation mode while Rx */
rfalEHandling eHandling; /*!< RFAL's error handling config/mode */
} rfalConfigs;
/*! Struct that holds NFC-F data - Used only inside rfalFelicaPoll() (static to avoid adding it into stack) */
typedef struct {
rfalFeliCaPollRes
pollResponses[RFAL_FELICA_POLL_MAX_SLOTS]; /* FeliCa Poll response container for 16 slots */
} rfalNfcfWorkingData;
/*! Struct that holds NFC-V current context
*
* This buffer has to be big enough for coping with maximum response size (hamming coded)
* - inventory requests responses: 14*2+2 bytes
* - read single block responses: (32+4)*2+2 bytes
* - read multiple block could be very long... -> not supported
* - current implementation expects it be written in one bulk into FIFO
* - needs to be above FIFO water level of ST25R3916 (200)
* - the coding function needs to be able to
* put more than FIFO water level bytes into it (n*64+1)>200 */
typedef struct {
uint8_t codingBuffer[(
(2 + 255 + 3) * 2)]; /*!< Coding buffer, length MUST be above 257: [257; ...] */
uint16_t
nfcvOffset; /*!< Offset needed for ISO15693 coding function */
rfalTransceiveContext
origCtx; /*!< context provided by user */
uint16_t
ignoreBits; /*!< Number of bits at the beginning of a frame to be ignored when decoding */
} rfalNfcvWorkingData;
/*! RFAL instance */
typedef struct {
rfalState state; /*!< RFAL's current state */
rfalMode mode; /*!< RFAL's current mode */
rfalBitRate txBR; /*!< RFAL's current Tx Bit Rate */
rfalBitRate rxBR; /*!< RFAL's current Rx Bit Rate */
bool field; /*!< Current field state (On / Off) */
rfalConfigs conf; /*!< RFAL's configuration settings */
rfalTimings timings; /*!< RFAL's timing setting */
rfalTxRx TxRx; /*!< RFAL's transceive management */
rfalFIFO fifo; /*!< RFAL's FIFO management */
rfalTimers tmr; /*!< RFAL's Software timers */
rfalCallbacks callbacks; /*!< RFAL's callbacks */
#if RFAL_FEATURE_LISTEN_MODE
rfalLm Lm; /*!< RFAL's listen mode management */
#endif /* RFAL_FEATURE_LISTEN_MODE */
#if RFAL_FEATURE_WAKEUP_MODE
rfalWum wum; /*!< RFAL's Wake-up mode management */
#endif /* RFAL_FEATURE_WAKEUP_MODE */
#if RFAL_FEATURE_LOWPOWER_MODE
rfalLpm lpm; /*!< RFAL's Low power mode management */
#endif /* RFAL_FEATURE_LOWPOWER_MODE */
#if RFAL_FEATURE_NFCF
rfalNfcfWorkingData nfcfData; /*!< RFAL's working data when supporting NFC-F */
#endif /* RFAL_FEATURE_NFCF */
#if RFAL_FEATURE_NFCV
rfalNfcvWorkingData nfcvData; /*!< RFAL's working data when performing NFC-V */
#endif /* RFAL_FEATURE_NFCV */
} rfal;
/*! Felica's command set */
typedef enum {
FELICA_CMD_POLLING =
0x00, /*!< Felica Poll/REQC command (aka SENSF_REQ) to identify a card */
FELICA_CMD_POLLING_RES =
0x01, /*!< Felica Poll/REQC command (aka SENSF_RES) response */
FELICA_CMD_REQUEST_SERVICE =
0x02, /*!< verify the existence of Area and Service */
FELICA_CMD_REQUEST_RESPONSE =
0x04, /*!< verify the existence of a card */
FELICA_CMD_READ_WITHOUT_ENCRYPTION =
0x06, /*!< read Block Data from a Service that requires no authentication */
FELICA_CMD_WRITE_WITHOUT_ENCRYPTION =
0x08, /*!< write Block Data to a Service that requires no authentication */
FELICA_CMD_REQUEST_SYSTEM_CODE =
0x0C, /*!< acquire the System Code registered to a card */
FELICA_CMD_AUTHENTICATION1 =
0x10, /*!< authenticate a card */
FELICA_CMD_AUTHENTICATION2 =
0x12, /*!< allow a card to authenticate a Reader/Writer */
FELICA_CMD_READ = 0x14, /*!< read Block Data from a Service that requires authentication */
FELICA_CMD_WRITE = 0x16, /*!< write Block Data to a Service that requires authentication */
} t_rfalFeliCaCmd;
/*! Union representing all PTMem sections */
typedef union { /* PRQA S 0750 # MISRA 19.2 - Both members are of the same type, just different names. Thus no problem can occur. */
uint8_t PTMem_A
[ST25R3916_PTM_A_LEN]; /*!< PT_Memory area allocated for NFC-A configuration */
uint8_t PTMem_F
[ST25R3916_PTM_F_LEN]; /*!< PT_Memory area allocated for NFC-F configuration */
uint8_t
TSN[ST25R3916_PTM_TSN_LEN]; /*!< PT_Memory area allocated for TSN - Random numbers */
} t_rfalPTMem;
/*
******************************************************************************
* GLOBAL DEFINES
******************************************************************************
*/
#define RFAL_FIFO_IN_WL \
200U /*!< Number of bytes in the FIFO when WL interrupt occurs while Tx */
#define RFAL_FIFO_OUT_WL \
(ST25R3916_FIFO_DEPTH - \
RFAL_FIFO_IN_WL) /*!< Number of bytes sent/out of the FIFO when WL interrupt occurs while Tx */
#define RFAL_FIFO_STATUS_REG1 \
0U /*!< Location of FIFO status register 1 in local copy */
#define RFAL_FIFO_STATUS_REG2 \
1U /*!< Location of FIFO status register 2 in local copy */
#define RFAL_FIFO_STATUS_INVALID \
0xFFU /*!< Value indicating that the local FIFO status in invalid|cleared */
#define RFAL_ST25R3916_GPT_MAX_1FC \
rfalConv8fcTo1fc( \
0xFFFFU) /*!< Max GPT steps in 1fc (0xFFFF steps of 8/fc => 0xFFFF * 590ns = 38,7ms) */
#define RFAL_ST25R3916_NRT_MAX_1FC \
rfalConv4096fcTo1fc( \
0xFFFFU) /*!< Max NRT steps in 1fc (0xFFFF steps of 4096/fc => 0xFFFF * 302us = 19.8s ) */
#define RFAL_ST25R3916_NRT_DISABLED \
0U /*!< NRT Disabled: All 0 No-response timer is not started, wait forever */
#define RFAL_ST25R3916_MRT_MAX_1FC \
rfalConv64fcTo1fc( \
0x00FFU) /*!< Max MRT steps in 1fc (0x00FF steps of 64/fc => 0x00FF * 4.72us = 1.2ms ) */
#define RFAL_ST25R3916_MRT_MIN_1FC \
rfalConv64fcTo1fc( \
0x0004U) /*!< Min MRT steps in 1fc ( 0<=mrt<=4 ; 4 (64/fc) => 0x0004 * 4.72us = 18.88us ) */
#define RFAL_ST25R3916_GT_MAX_1FC \
rfalConvMsTo1fc( \
6000U) /*!< Max GT value allowed in 1/fc (SFGI=14 => SFGT + dSFGT = 5.4s) */
#define RFAL_ST25R3916_GT_MIN_1FC \
rfalConvMsTo1fc( \
RFAL_ST25R3916_SW_TMR_MIN_1MS) /*!< Min GT value allowed in 1/fc */
#define RFAL_ST25R3916_SW_TMR_MIN_1MS \
1U /*!< Min value of a SW timer in ms */
#define RFAL_OBSMODE_DISABLE \
0x00U /*!< Observation Mode disabled */
#define RFAL_RX_INCOMPLETE_MAXLEN \
(uint8_t)1U /*!< Threshold value where incoming rx may be considered as incomplete */
#define RFAL_EMVCO_RX_MAXLEN \
(uint8_t)4U /*!< Maximum value where EMVCo to apply special error handling */
#define RFAL_NORXE_TOUT \
50U /*!< Timeout to be used on a potential missing RXE - Silicon ST25R3916 Errata #TBD */
#define RFAL_ISO14443A_SDD_RES_LEN \
5U /*!< SDD_RES | Anticollision (UID CLn) length - rfalNfcaSddRes */
#define RFAL_ISO14443A_CRC_INTVAL \
0x6363 /*!< ISO14443 CRC Initial Value|Register */
#define RFAL_FELICA_POLL_DELAY_TIME \
512U /*!< FeliCa Poll Processing time is 2.417 ms ~512*64/fc Digital 1.1 A4 */
#define RFAL_FELICA_POLL_SLOT_TIME \
256U /*!< FeliCa Poll Time Slot duration is 1.208 ms ~256*64/fc Digital 1.1 A4 */
#define RFAL_LM_SENSF_RD0_POS \
17U /*!< FeliCa SENSF_RES Request Data RD0 position */
#define RFAL_LM_SENSF_RD1_POS \
18U /*!< FeliCa SENSF_RES Request Data RD1 position */
#define RFAL_LM_NFCID_INCOMPLETE \
0x04U /*!< NFCA NFCID not complete bit in SEL_RES (SAK) */
#define RFAL_ISO15693_IGNORE_BITS \
rfalConvBytesToBits( \
2U) /*!< Ignore collisions before the UID (RES_FLAG + DSFID) */
#define RFAL_ISO15693_INV_RES_LEN \
12U /*!< ISO15693 Inventory response length with CRC (bytes) */
#define RFAL_ISO15693_INV_RES_DUR \
4U /*!< ISO15693 Inventory response duration @ 26 kbps (ms) */
#define RFAL_WU_MIN_WEIGHT_VAL \
4U /*!< ST25R3916 minimum Wake-up weight value */
/*******************************************************************************/
#define RFAL_LM_GT \
rfalConvUsTo1fc( \
100U) /*!< Listen Mode Guard Time enforced (GT - Passive; TIRFG - Active) */
#define RFAL_FDT_POLL_ADJUSTMENT \
rfalConvUsTo1fc( \
80U) /*!< FDT Poll adjustment: Time between the expiration of GPT to the actual Tx */
#define RFAL_FDT_LISTEN_MRT_ADJUSTMENT \
64U /*!< MRT jitter adjustment: timeout will be between [ tout ; tout + 64 cycles ] */
#define RFAL_AP2P_FIELDOFF_TRFW \
rfalConv8fcTo1fc( \
64U) /*!< Time after TXE and Field Off in AP2P Trfw: 37.76us -> 64 (8/fc) */
#ifndef RFAL_ST25R3916_AAT_SETTLE
#define RFAL_ST25R3916_AAT_SETTLE \
5U /*!< Time in ms required for AAT pins and Osc to settle after en bit set */
#endif /* RFAL_ST25R3916_AAT_SETTLE */
/*! FWT adjustment:
* 64 : NRT jitter between TXE and NRT start */
#define RFAL_FWT_ADJUSTMENT 64U
/*! FWT ISO14443A adjustment:
* 512 : 4bit length
* 64 : Half a bit duration due to ST25R3916 Coherent receiver (1/fc) */
#define RFAL_FWT_A_ADJUSTMENT (512U + 64U)
/*! FWT ISO14443B adjustment:
* SOF (14etu) + 1Byte (10etu) + 1etu (IRQ comes 1etu after first byte) - 3etu (ST25R3916 sends TXE 3etu after) */
#define RFAL_FWT_B_ADJUSTMENT ((14U + 10U + 1U - 3U) * 128U)
/*! FWT FeliCa 212 adjustment:
* 1024 : Length of the two Sync bytes at 212kbps */
#define RFAL_FWT_F_212_ADJUSTMENT 1024U
/*! FWT FeliCa 424 adjustment:
* 512 : Length of the two Sync bytes at 424kbps */
#define RFAL_FWT_F_424_ADJUSTMENT 512U
/*! Time between our field Off and other peer field On : Tadt + (n x Trfw)
* Ecma 340 11.1.2 - Tadt: [56.64 , 188.72] us ; n: [0 , 3] ; Trfw = 37.76 us
* Should be: 189 + (3*38) = 303us ; we'll use a more relaxed setting: 605 us */
#define RFAL_AP2P_FIELDON_TADTTRFW rfalConvUsTo1fc(605U)
/*! FDT Listen adjustment for ISO14443A EMVCo 2.6 4.8.1.3 ; Digital 1.1 6.10
*
* 276: Time from the rising pulse of the pause of the logic '1' (i.e. the time point to measure the deaftime from),
* to the actual end of the EOF sequence (the point where the MRT starts). Please note that the ST25R391x uses the
* ISO14443-2 definition where the EOF consists of logic '0' followed by sequence Y.
* -64: Further adjustment for receiver to be ready just before first bit
*/
#define RFAL_FDT_LISTEN_A_ADJUSTMENT (276U - 64U)
/*! FDT Listen adjustment for ISO14443B EMVCo 2.6 4.8.1.6 ; Digital 1.1 7.9
*
* 340: Time from the rising edge of the EoS to the starting point of the MRT timer (sometime after the final high
* part of the EoS is completed)
*/
#define RFAL_FDT_LISTEN_B_ADJUSTMENT 340U
/*! FDT Listen adjustment for ISO15693
* ISO15693 2000 8.4 t1 MIN = 4192/fc
* ISO15693 2009 9.1 t1 MIN = 4320/fc
* Digital 2.1 B.5 FDTV,LISTEN,MIN = 4310/fc
* Set FDT Listen one step earlier than on the more recent spec versions for greater interoprability
*/
#define RFAL_FDT_LISTEN_V_ADJUSTMENT 64U
/*! FDT Poll adjustment for ISO14443B Correlator - sst 5 etu */
#define RFAL_FDT_LISTEN_B_ADJT_CORR 128U
/*! FDT Poll adjustment for ISO14443B Correlator sst window - 5 etu */
#define RFAL_FDT_LISTEN_B_ADJT_CORR_SST 20U
/*
******************************************************************************
* GLOBAL MACROS
******************************************************************************
*/
/*! Calculates Transceive Sanity Timer. It accounts for the slowest bit rate and the longest data format
* 1s for transmission and reception of a 4K message at 106kpbs (~425ms each direction)
* plus TxRx preparation and FIFO load over Serial Interface */
#define rfalCalcSanityTmr(fwt) (uint16_t)(1000U + rfalConv1fcToMs((fwt)))
#define rfalGennTRFW(n) \
(((n) + 1U) & \
ST25R3916_REG_AUX_nfc_n_mask) /*!< Generates the next n*TRRW used for RFCA */
#define rfalCalcNumBytes(nBits) \
(((uint32_t)(nBits) + 7U) / \
8U) /*!< Returns the number of bytes required to fit given the number of bits */
#define rfalTimerStart(timer, time_ms) \
do { \
platformTimerDestroy(timer); \
(timer) = platformTimerCreate((uint16_t)(time_ms)); \
} while(0) /*!< Configures and starts timer */
#define rfalTimerisExpired(timer) \
platformTimerIsExpired( \
timer) /*!< Checks if timer has expired */
#define rfalTimerDestroy(timer) \
platformTimerDestroy( \
timer) /*!< Destroys timer */
#define rfalST25R3916ObsModeDisable() \
st25r3916WriteTestRegister( \
0x01U, \
(0x40U)) /*!< Disable ST25R3916 Observation mode */
#define rfalST25R3916ObsModeTx() \
st25r3916WriteTestRegister( \
0x01U, \
(0x40U | \
gRFAL.conf \
.obsvModeTx)) /*!< Enable Tx Observation mode */
#define rfalST25R3916ObsModeRx() \
st25r3916WriteTestRegister( \
0x01U, \
(0x40U | \
gRFAL.conf \
.obsvModeRx)) /*!< Enable Rx Observation mode */
#define rfalCheckDisableObsMode() \
if(gRFAL.conf.obsvModeRx != 0U) { \
rfalST25R3916ObsModeDisable(); \
} /*!< Checks if the observation mode is enabled, and applies on ST25R3916 */
#define rfalCheckEnableObsModeTx() \
if(gRFAL.conf.obsvModeTx != 0U) { \
rfalST25R3916ObsModeTx(); \
} /*!< Checks if the observation mode is enabled, and applies on ST25R3916 */
#define rfalCheckEnableObsModeRx() \
if(gRFAL.conf.obsvModeRx != 0U) { \
rfalST25R3916ObsModeRx(); \
} /*!< Checks if the observation mode is enabled, and applies on ST25R3916 */
#define rfalGetIncmplBits(FIFOStatus2) \
(((FIFOStatus2) >> 1) & \
0x07U) /*!< Returns the number of bits from fifo status */
#define rfalIsIncompleteByteError(error) \
(((error) >= ERR_INCOMPLETE_BYTE) && \
((error) <= \
ERR_INCOMPLETE_BYTE_07)) /*!< Checks if given error is a Incomplete error */
#define rfalAdjACBR(b) \
(((uint16_t)(b) >= (uint16_t)RFAL_BR_52p97) ? \
(uint16_t)(b) : \
((uint16_t)(b) + \
1U)) /*!< Adjusts ST25R391x Bit rate to Analog Configuration */
#define rfalConvBR2ACBR(b) \
(((rfalAdjACBR((b))) << RFAL_ANALOG_CONFIG_BITRATE_SHIFT) & \
RFAL_ANALOG_CONFIG_BITRATE_MASK) /*!< Converts ST25R391x Bit rate to Analog Configuration bit rate id */
#define rfalConvTDFormat(v) \
((uint16_t)(v) << 8U) /*!< Converts a uint8_t to the format used in SW Tag Detection */
/*
******************************************************************************
* LOCAL VARIABLES
******************************************************************************
*/
static rfal gRFAL; /*!< RFAL module instance */
/*
******************************************************************************
* LOCAL FUNCTION PROTOTYPES
******************************************************************************
*/
static void rfalTransceiveTx(void);
static void rfalTransceiveRx(void);
static ReturnCode rfalTransceiveRunBlockingTx(void);
static void rfalPrepareTransceive(void);
static void rfalCleanupTransceive(void);
static void rfalErrorHandling(void);
static ReturnCode rfalRunTransceiveWorker(void);
#if RFAL_FEATURE_LISTEN_MODE
static ReturnCode rfalRunListenModeWorker(void);
#endif /* RFAL_FEATURE_LISTEN_MODE */
#if RFAL_FEATURE_WAKEUP_MODE
static void rfalRunWakeUpModeWorker(void);
static uint16_t rfalWakeUpModeFilter(uint16_t curRef, uint16_t curVal, uint8_t weight);
#endif /* RFAL_FEATURE_WAKEUP_MODE */
static void rfalFIFOStatusUpdate(void);
static void rfalFIFOStatusClear(void);
static bool rfalFIFOStatusIsMissingPar(void);
static bool rfalFIFOStatusIsIncompleteByte(void);
static uint16_t rfalFIFOStatusGetNumBytes(void);
static uint8_t rfalFIFOGetNumIncompleteBits(void);
/*
******************************************************************************
* GLOBAL FUNCTIONS
******************************************************************************
*/
/*******************************************************************************/
ReturnCode rfalInitialize(void) {
ReturnCode err;
EXIT_ON_ERR(err, st25r3916Initialize());
st25r3916ClearInterrupts();
/* Disable any previous observation mode */
rfalST25R3916ObsModeDisable();
/*******************************************************************************/
/* Apply RF Chip generic initialization */
rfalSetAnalogConfig((RFAL_ANALOG_CONFIG_TECH_CHIP | RFAL_ANALOG_CONFIG_CHIP_INIT));
// TODO:
// I don't want to mess with config table ("Default Analog Configuration for Chip-Specific Reset", rfal_analogConfigTbl.h)
// so with every rfalSetAnalogConfig((RFAL_ANALOG_CONFIG_CHIP_INIT)) currently we need to clear pulldown bits
// luckily for us this is done only here
// disable pulldowns
st25r3916ClrRegisterBits(
ST25R3916_REG_IO_CONF2,
(ST25R3916_REG_IO_CONF2_miso_pd1 | ST25R3916_REG_IO_CONF2_miso_pd2));
/*******************************************************************************/
/* Enable External Field Detector as: Automatics */
st25r3916ChangeRegisterBits(
ST25R3916_REG_OP_CONTROL,
ST25R3916_REG_OP_CONTROL_en_fd_mask,
ST25R3916_REG_OP_CONTROL_en_fd_auto_efd);
/* Clear FIFO status local copy */
rfalFIFOStatusClear();
/*******************************************************************************/
gRFAL.state = RFAL_STATE_INIT;
gRFAL.mode = RFAL_MODE_NONE;
gRFAL.field = false;
/* Set RFAL default configs */
gRFAL.conf.obsvModeRx = RFAL_OBSMODE_DISABLE;
gRFAL.conf.obsvModeTx = RFAL_OBSMODE_DISABLE;
gRFAL.conf.eHandling = RFAL_ERRORHANDLING_NONE;
/* Transceive set to IDLE */
gRFAL.TxRx.lastState = RFAL_TXRX_STATE_IDLE;
gRFAL.TxRx.state = RFAL_TXRX_STATE_IDLE;
/* Disable all timings */
gRFAL.timings.FDTListen = RFAL_TIMING_NONE;
gRFAL.timings.FDTPoll = RFAL_TIMING_NONE;
gRFAL.timings.GT = RFAL_TIMING_NONE;
gRFAL.timings.nTRFW = 0U;
/* Destroy any previous pending timers */
rfalTimerDestroy(gRFAL.tmr.GT);
rfalTimerDestroy(gRFAL.tmr.txRx);
rfalTimerDestroy(gRFAL.tmr.RXE);
gRFAL.tmr.GT = RFAL_TIMING_NONE;
gRFAL.tmr.txRx = RFAL_TIMING_NONE;
gRFAL.tmr.RXE = RFAL_TIMING_NONE;
gRFAL.callbacks.preTxRx = NULL;
gRFAL.callbacks.postTxRx = NULL;
gRFAL.callbacks.state_changed_cb = NULL;
gRFAL.callbacks.ctx = NULL;
#if RFAL_FEATURE_NFCV
/* Initialize NFC-V Data */
gRFAL.nfcvData.ignoreBits = 0;
#endif /* RFAL_FEATURE_NFCV */
#if RFAL_FEATURE_LISTEN_MODE
/* Initialize Listen Mode */
gRFAL.Lm.state = RFAL_LM_STATE_NOT_INIT;
gRFAL.Lm.brDetected = RFAL_BR_KEEP;
gRFAL.Lm.iniFlag = false;
#endif /* RFAL_FEATURE_LISTEN_MODE */
#if RFAL_FEATURE_WAKEUP_MODE
/* Initialize Wake-Up Mode */
gRFAL.wum.state = RFAL_WUM_STATE_NOT_INIT;
#endif /* RFAL_FEATURE_WAKEUP_MODE */
#if RFAL_FEATURE_LOWPOWER_MODE
/* Initialize Low Power Mode */
gRFAL.lpm.isRunning = false;
#endif /* RFAL_FEATURE_LOWPOWER_MODE */
/*******************************************************************************/
/* Perform Automatic Calibration (if configured to do so). *
* Registers set by rfalSetAnalogConfig will tell rfalCalibrate what to perform*/
rfalCalibrate();
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode rfalCalibrate(void) {
uint16_t resValue;
/* Check if RFAL is not initialized */
if(gRFAL.state == RFAL_STATE_IDLE) {
return ERR_WRONG_STATE;
}
/*******************************************************************************/
/* Perform ST25R3916 regulators and antenna calibration */
/*******************************************************************************/
/* Automatic regulator adjustment only performed if not set manually on Analog Configs */
if(st25r3916CheckReg(
ST25R3916_REG_REGULATOR_CONTROL, ST25R3916_REG_REGULATOR_CONTROL_reg_s, 0x00)) {
/* Adjust the regulators so that Antenna Calibrate has better Regulator values */
st25r3916AdjustRegulators(&resValue);
}
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode rfalAdjustRegulators(uint16_t* result) {
return st25r3916AdjustRegulators(result);
}
/*******************************************************************************/
void rfalSetUpperLayerCallback(rfalUpperLayerCallback pFunc) {
st25r3916IRQCallbackSet(pFunc);
}
/*******************************************************************************/
void rfalSetPreTxRxCallback(rfalPreTxRxCallback pFunc) {
gRFAL.callbacks.preTxRx = pFunc;
}
/*******************************************************************************/
void rfalSetPostTxRxCallback(rfalPostTxRxCallback pFunc) {
gRFAL.callbacks.postTxRx = pFunc;
}
void rfal_set_state_changed_callback(RfalStateChangedCallback callback) {
gRFAL.callbacks.state_changed_cb = callback;
}
void rfal_set_callback_context(void* context) {
gRFAL.callbacks.ctx = context;
}
/*******************************************************************************/
ReturnCode rfalDeinitialize(void) {
/* Deinitialize chip */
st25r3916Deinitialize();
/* Set Analog configurations for deinitialization */
rfalSetAnalogConfig((RFAL_ANALOG_CONFIG_TECH_CHIP | RFAL_ANALOG_CONFIG_CHIP_DEINIT));
gRFAL.state = RFAL_STATE_IDLE;
return ERR_NONE;
}
/*******************************************************************************/
void rfalSetObsvMode(uint8_t txMode, uint8_t rxMode) {
gRFAL.conf.obsvModeTx = txMode;
gRFAL.conf.obsvModeRx = rxMode;
}
/*******************************************************************************/
void rfalGetObsvMode(uint8_t* txMode, uint8_t* rxMode) {
if(txMode != NULL) {
*txMode = gRFAL.conf.obsvModeTx;
}
if(rxMode != NULL) {
*rxMode = gRFAL.conf.obsvModeRx;
}
}
/*******************************************************************************/
void rfalDisableObsvMode(void) {
gRFAL.conf.obsvModeTx = RFAL_OBSMODE_DISABLE;
gRFAL.conf.obsvModeRx = RFAL_OBSMODE_DISABLE;
}
/*******************************************************************************/
ReturnCode rfalSetMode(rfalMode mode, rfalBitRate txBR, rfalBitRate rxBR) {
/* Check if RFAL is not initialized */
if(gRFAL.state == RFAL_STATE_IDLE) {
return ERR_WRONG_STATE;
}
/* Check allowed bit rate value */
if((txBR == RFAL_BR_KEEP) || (rxBR == RFAL_BR_KEEP)) {
return ERR_PARAM;
}
switch(mode) {
/*******************************************************************************/
case RFAL_MODE_POLL_NFCA:
/* Disable wake up mode, if set */
st25r3916ClrRegisterBits(ST25R3916_REG_OP_CONTROL, ST25R3916_REG_OP_CONTROL_wu);
/* Enable ISO14443A mode */
st25r3916WriteRegister(ST25R3916_REG_MODE, ST25R3916_REG_MODE_om_iso14443a);
/* Set Analog configurations for this mode and bit rate */
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCA |
RFAL_ANALOG_CONFIG_BITRATE_COMMON | RFAL_ANALOG_CONFIG_TX));
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCA |
RFAL_ANALOG_CONFIG_BITRATE_COMMON | RFAL_ANALOG_CONFIG_RX));
break;
/*******************************************************************************/
case RFAL_MODE_POLL_NFCA_T1T:
/* Disable wake up mode, if set */
st25r3916ClrRegisterBits(ST25R3916_REG_OP_CONTROL, ST25R3916_REG_OP_CONTROL_wu);
/* Enable Topaz mode */
st25r3916WriteRegister(ST25R3916_REG_MODE, ST25R3916_REG_MODE_om_topaz);
/* Set Analog configurations for this mode and bit rate */
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCA |
RFAL_ANALOG_CONFIG_BITRATE_COMMON | RFAL_ANALOG_CONFIG_TX));
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCA |
RFAL_ANALOG_CONFIG_BITRATE_COMMON | RFAL_ANALOG_CONFIG_RX));
break;
/*******************************************************************************/
case RFAL_MODE_POLL_NFCB:
/* Disable wake up mode, if set */
st25r3916ClrRegisterBits(ST25R3916_REG_OP_CONTROL, ST25R3916_REG_OP_CONTROL_wu);
/* Enable ISO14443B mode */
st25r3916WriteRegister(ST25R3916_REG_MODE, ST25R3916_REG_MODE_om_iso14443b);
/* Set the EGT, SOF, EOF and EOF */
st25r3916ChangeRegisterBits(
ST25R3916_REG_ISO14443B_1,
(ST25R3916_REG_ISO14443B_1_egt_mask | ST25R3916_REG_ISO14443B_1_sof_mask |
ST25R3916_REG_ISO14443B_1_eof),
((0U << ST25R3916_REG_ISO14443B_1_egt_shift) | ST25R3916_REG_ISO14443B_1_sof_0_10etu |
ST25R3916_REG_ISO14443B_1_sof_1_2etu | ST25R3916_REG_ISO14443B_1_eof_10etu));
/* Set the minimum TR1, SOF, EOF and EOF12 */
st25r3916ChangeRegisterBits(
ST25R3916_REG_ISO14443B_2,
(ST25R3916_REG_ISO14443B_2_tr1_mask | ST25R3916_REG_ISO14443B_2_no_sof |
ST25R3916_REG_ISO14443B_2_no_eof),
(ST25R3916_REG_ISO14443B_2_tr1_80fs80fs));
/* Set Analog configurations for this mode and bit rate */
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCB |
RFAL_ANALOG_CONFIG_BITRATE_COMMON | RFAL_ANALOG_CONFIG_TX));
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCB |
RFAL_ANALOG_CONFIG_BITRATE_COMMON | RFAL_ANALOG_CONFIG_RX));
break;
/*******************************************************************************/
case RFAL_MODE_POLL_B_PRIME:
/* Disable wake up mode, if set */
st25r3916ClrRegisterBits(ST25R3916_REG_OP_CONTROL, ST25R3916_REG_OP_CONTROL_wu);
/* Enable ISO14443B mode */
st25r3916WriteRegister(ST25R3916_REG_MODE, ST25R3916_REG_MODE_om_iso14443b);
/* Set the EGT, SOF, EOF and EOF */
st25r3916ChangeRegisterBits(
ST25R3916_REG_ISO14443B_1,
(ST25R3916_REG_ISO14443B_1_egt_mask | ST25R3916_REG_ISO14443B_1_sof_mask |
ST25R3916_REG_ISO14443B_1_eof),
((0U << ST25R3916_REG_ISO14443B_1_egt_shift) | ST25R3916_REG_ISO14443B_1_sof_0_10etu |
ST25R3916_REG_ISO14443B_1_sof_1_2etu | ST25R3916_REG_ISO14443B_1_eof_10etu));
/* Set the minimum TR1, EOF and EOF12 */
st25r3916ChangeRegisterBits(
ST25R3916_REG_ISO14443B_2,
(ST25R3916_REG_ISO14443B_2_tr1_mask | ST25R3916_REG_ISO14443B_2_no_sof |
ST25R3916_REG_ISO14443B_2_no_eof),
(ST25R3916_REG_ISO14443B_2_tr1_80fs80fs | ST25R3916_REG_ISO14443B_2_no_sof));
/* Set Analog configurations for this mode and bit rate */
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCB |
RFAL_ANALOG_CONFIG_BITRATE_COMMON | RFAL_ANALOG_CONFIG_TX));
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCB |
RFAL_ANALOG_CONFIG_BITRATE_COMMON | RFAL_ANALOG_CONFIG_RX));
break;
/*******************************************************************************/
case RFAL_MODE_POLL_B_CTS:
/* Disable wake up mode, if set */
st25r3916ClrRegisterBits(ST25R3916_REG_OP_CONTROL, ST25R3916_REG_OP_CONTROL_wu);
/* Enable ISO14443B mode */
st25r3916WriteRegister(ST25R3916_REG_MODE, ST25R3916_REG_MODE_om_iso14443b);
/* Set the EGT, SOF, EOF and EOF */
st25r3916ChangeRegisterBits(
ST25R3916_REG_ISO14443B_1,
(ST25R3916_REG_ISO14443B_1_egt_mask | ST25R3916_REG_ISO14443B_1_sof_mask |
ST25R3916_REG_ISO14443B_1_eof),
((0U << ST25R3916_REG_ISO14443B_1_egt_shift) | ST25R3916_REG_ISO14443B_1_sof_0_10etu |
ST25R3916_REG_ISO14443B_1_sof_1_2etu | ST25R3916_REG_ISO14443B_1_eof_10etu));
/* Set the minimum TR1, clear SOF, EOF and EOF12 */
st25r3916ChangeRegisterBits(
ST25R3916_REG_ISO14443B_2,
(ST25R3916_REG_ISO14443B_2_tr1_mask | ST25R3916_REG_ISO14443B_2_no_sof |
ST25R3916_REG_ISO14443B_2_no_eof),
(ST25R3916_REG_ISO14443B_2_tr1_80fs80fs | ST25R3916_REG_ISO14443B_2_no_sof |
ST25R3916_REG_ISO14443B_2_no_eof));
/* Set Analog configurations for this mode and bit rate */
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCB |
RFAL_ANALOG_CONFIG_BITRATE_COMMON | RFAL_ANALOG_CONFIG_TX));
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCB |
RFAL_ANALOG_CONFIG_BITRATE_COMMON | RFAL_ANALOG_CONFIG_RX));
break;
/*******************************************************************************/
case RFAL_MODE_POLL_NFCF:
/* Disable wake up mode, if set */
st25r3916ClrRegisterBits(ST25R3916_REG_OP_CONTROL, ST25R3916_REG_OP_CONTROL_wu);
/* Enable FeliCa mode */
st25r3916WriteRegister(ST25R3916_REG_MODE, ST25R3916_REG_MODE_om_felica);
/* Set Analog configurations for this mode and bit rate */
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCF |
RFAL_ANALOG_CONFIG_BITRATE_COMMON | RFAL_ANALOG_CONFIG_TX));
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCF |
RFAL_ANALOG_CONFIG_BITRATE_COMMON | RFAL_ANALOG_CONFIG_RX));
break;
/*******************************************************************************/
case RFAL_MODE_POLL_NFCV:
case RFAL_MODE_POLL_PICOPASS:
#if !RFAL_FEATURE_NFCV
return ERR_DISABLED;
#else
/* Disable wake up mode, if set */
st25r3916ClrRegisterBits(ST25R3916_REG_OP_CONTROL, ST25R3916_REG_OP_CONTROL_wu);
/* Set Analog configurations for this mode and bit rate */
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCV |
RFAL_ANALOG_CONFIG_BITRATE_COMMON | RFAL_ANALOG_CONFIG_TX));
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCV |
RFAL_ANALOG_CONFIG_BITRATE_COMMON | RFAL_ANALOG_CONFIG_RX));
break;
#endif /* RFAL_FEATURE_NFCV */
/*******************************************************************************/
case RFAL_MODE_POLL_ACTIVE_P2P:
/* Set NFCIP1 active communication Initiator mode and Automatic Response RF Collision Avoidance to always after EOF */
st25r3916WriteRegister(
ST25R3916_REG_MODE,
(ST25R3916_REG_MODE_targ_init | ST25R3916_REG_MODE_om_nfc |
ST25R3916_REG_MODE_nfc_ar_eof));
/* External Field Detector enabled as Automatics on rfalInitialize() */
/* Set NRT to start at end of TX (own) field */
st25r3916ChangeRegisterBits(
ST25R3916_REG_TIMER_EMV_CONTROL,
ST25R3916_REG_TIMER_EMV_CONTROL_nrt_nfc,
ST25R3916_REG_TIMER_EMV_CONTROL_nrt_nfc_off);
/* Set GPT to start after end of TX, as GPT is used in active communication mode to timeout the field switching off */
/* The field is turned off 37.76us after the end of the transmission Trfw */
st25r3916SetStartGPTimer(
(uint16_t)rfalConv1fcTo8fc(RFAL_AP2P_FIELDOFF_TRFW),
ST25R3916_REG_TIMER_EMV_CONTROL_gptc_etx_nfc);
/* Set PPon2 timer with the max time between our field Off and other peer field On : Tadt + (n x Trfw) */
st25r3916WriteRegister(
ST25R3916_REG_PPON2, (uint8_t)rfalConv1fcTo64fc(RFAL_AP2P_FIELDON_TADTTRFW));
/* Set Analog configurations for this mode and bit rate */
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_AP2P |
RFAL_ANALOG_CONFIG_BITRATE_COMMON | RFAL_ANALOG_CONFIG_TX));
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_AP2P |
RFAL_ANALOG_CONFIG_BITRATE_COMMON | RFAL_ANALOG_CONFIG_RX));
break;
/*******************************************************************************/
case RFAL_MODE_LISTEN_ACTIVE_P2P:
/* Set NFCIP1 active communication Target mode and Automatic Response RF Collision Avoidance to always after EOF */
st25r3916WriteRegister(
ST25R3916_REG_MODE,
(ST25R3916_REG_MODE_targ_targ | ST25R3916_REG_MODE_om_targ_nfcip |
ST25R3916_REG_MODE_nfc_ar_eof));
/* Set TARFG: 0 (75us+0ms=75us), as Target no Guard time needed */
st25r3916WriteRegister(ST25R3916_REG_FIELD_ON_GT, 0U);
/* External Field Detector enabled as Automatics on rfalInitialize() */
/* Set NRT to start at end of TX (own) field */
st25r3916ChangeRegisterBits(
ST25R3916_REG_TIMER_EMV_CONTROL,
ST25R3916_REG_TIMER_EMV_CONTROL_nrt_nfc,
ST25R3916_REG_TIMER_EMV_CONTROL_nrt_nfc_off);
/* Set GPT to start after end of TX, as GPT is used in active communication mode to timeout the field switching off */
/* The field is turned off 37.76us after the end of the transmission Trfw */
st25r3916SetStartGPTimer(
(uint16_t)rfalConv1fcTo8fc(RFAL_AP2P_FIELDOFF_TRFW),
ST25R3916_REG_TIMER_EMV_CONTROL_gptc_etx_nfc);
/* Set PPon2 timer with the max time between our field Off and other peer field On : Tadt + (n x Trfw) */
st25r3916WriteRegister(
ST25R3916_REG_PPON2, (uint8_t)rfalConv1fcTo64fc(RFAL_AP2P_FIELDON_TADTTRFW));
/* Set Analog configurations for this mode and bit rate */
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_LISTEN | RFAL_ANALOG_CONFIG_TECH_AP2P |
RFAL_ANALOG_CONFIG_BITRATE_COMMON | RFAL_ANALOG_CONFIG_TX));
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_LISTEN | RFAL_ANALOG_CONFIG_TECH_AP2P |
RFAL_ANALOG_CONFIG_BITRATE_COMMON | RFAL_ANALOG_CONFIG_RX));
break;
/*******************************************************************************/
case RFAL_MODE_LISTEN_NFCA:
/* Disable wake up mode, if set */
st25r3916ClrRegisterBits(ST25R3916_REG_OP_CONTROL, ST25R3916_REG_OP_CONTROL_wu);
/* Enable Passive Target NFC-A mode, disable any Collision Avoidance */
st25r3916WriteRegister(
ST25R3916_REG_MODE,
(ST25R3916_REG_MODE_targ | ST25R3916_REG_MODE_om_targ_nfca |
ST25R3916_REG_MODE_nfc_ar_off));
/* Set Analog configurations for this mode */
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_LISTEN | RFAL_ANALOG_CONFIG_TECH_NFCA |
RFAL_ANALOG_CONFIG_BITRATE_COMMON | RFAL_ANALOG_CONFIG_TX));
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_LISTEN | RFAL_ANALOG_CONFIG_TECH_NFCA |
RFAL_ANALOG_CONFIG_BITRATE_COMMON | RFAL_ANALOG_CONFIG_RX));
break;
/*******************************************************************************/
case RFAL_MODE_LISTEN_NFCF:
/* Disable wake up mode, if set */
st25r3916ClrRegisterBits(ST25R3916_REG_OP_CONTROL, ST25R3916_REG_OP_CONTROL_wu);
/* Enable Passive Target NFC-F mode, disable any Collision Avoidance */
st25r3916WriteRegister(
ST25R3916_REG_MODE,
(ST25R3916_REG_MODE_targ | ST25R3916_REG_MODE_om_targ_nfcf |
ST25R3916_REG_MODE_nfc_ar_off));
/* Set Analog configurations for this mode */
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_LISTEN | RFAL_ANALOG_CONFIG_TECH_NFCF |
RFAL_ANALOG_CONFIG_BITRATE_COMMON | RFAL_ANALOG_CONFIG_TX));
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_LISTEN | RFAL_ANALOG_CONFIG_TECH_NFCF |
RFAL_ANALOG_CONFIG_BITRATE_COMMON | RFAL_ANALOG_CONFIG_RX));
break;
/*******************************************************************************/
case RFAL_MODE_LISTEN_NFCB:
return ERR_NOTSUPP;
/*******************************************************************************/
default:
return ERR_NOT_IMPLEMENTED;
}
/* Set state as STATE_MODE_SET only if not initialized yet (PSL) */
gRFAL.state = ((gRFAL.state < RFAL_STATE_MODE_SET) ? RFAL_STATE_MODE_SET : gRFAL.state);
gRFAL.mode = mode;
/* Apply the given bit rate */
return rfalSetBitRate(txBR, rxBR);
}
/*******************************************************************************/
rfalMode rfalGetMode(void) {
return gRFAL.mode;
}
/*******************************************************************************/
ReturnCode rfalSetBitRate(rfalBitRate txBR, rfalBitRate rxBR) {
ReturnCode ret;
/* Check if RFAL is not initialized */
if(gRFAL.state == RFAL_STATE_IDLE) {
return ERR_WRONG_STATE;
}
/* Store the new Bit Rates */
gRFAL.txBR = ((txBR == RFAL_BR_KEEP) ? gRFAL.txBR : txBR);
gRFAL.rxBR = ((rxBR == RFAL_BR_KEEP) ? gRFAL.rxBR : rxBR);
/* Update the bitrate reg if not in NFCV mode (streaming) */
if((RFAL_MODE_POLL_NFCV != gRFAL.mode) && (RFAL_MODE_POLL_PICOPASS != gRFAL.mode)) {
/* Set bit rate register */
EXIT_ON_ERR(ret, st25r3916SetBitrate((uint8_t)gRFAL.txBR, (uint8_t)gRFAL.rxBR));
}
switch(gRFAL.mode) {
/*******************************************************************************/
case RFAL_MODE_POLL_NFCA:
case RFAL_MODE_POLL_NFCA_T1T:
/* Set Analog configurations for this bit rate */
rfalSetAnalogConfig((RFAL_ANALOG_CONFIG_TECH_CHIP | RFAL_ANALOG_CONFIG_CHIP_POLL_COMMON));
rfalSetAnalogConfig( (rfalAnalogConfigId)(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCA | rfalConvBR2ACBR(gRFAL.txBR) | RFAL_ANALOG_CONFIG_TX ) );
rfalSetAnalogConfig( (rfalAnalogConfigId)(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCA | rfalConvBR2ACBR(gRFAL.rxBR) | RFAL_ANALOG_CONFIG_RX ) );
break;
/*******************************************************************************/
case RFAL_MODE_POLL_NFCB:
case RFAL_MODE_POLL_B_PRIME:
case RFAL_MODE_POLL_B_CTS:
/* Set Analog configurations for this bit rate */
rfalSetAnalogConfig((RFAL_ANALOG_CONFIG_TECH_CHIP | RFAL_ANALOG_CONFIG_CHIP_POLL_COMMON));
rfalSetAnalogConfig( (rfalAnalogConfigId)(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCB | rfalConvBR2ACBR(gRFAL.txBR) | RFAL_ANALOG_CONFIG_TX ) );
rfalSetAnalogConfig( (rfalAnalogConfigId)(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCB | rfalConvBR2ACBR(gRFAL.rxBR) | RFAL_ANALOG_CONFIG_RX ) );
break;
/*******************************************************************************/
case RFAL_MODE_POLL_NFCF:
/* Set Analog configurations for this bit rate */
rfalSetAnalogConfig((RFAL_ANALOG_CONFIG_TECH_CHIP | RFAL_ANALOG_CONFIG_CHIP_POLL_COMMON));
rfalSetAnalogConfig( (rfalAnalogConfigId)(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCF | rfalConvBR2ACBR(gRFAL.txBR) | RFAL_ANALOG_CONFIG_TX ) );
rfalSetAnalogConfig( (rfalAnalogConfigId)(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCF | rfalConvBR2ACBR(gRFAL.rxBR) | RFAL_ANALOG_CONFIG_RX ) );
break;
/*******************************************************************************/
case RFAL_MODE_POLL_NFCV:
case RFAL_MODE_POLL_PICOPASS:
#if !RFAL_FEATURE_NFCV
return ERR_DISABLED;
#else
if(((gRFAL.rxBR != RFAL_BR_26p48) && (gRFAL.rxBR != RFAL_BR_52p97)) ||
((gRFAL.txBR != RFAL_BR_1p66) && (gRFAL.txBR != RFAL_BR_26p48))) {
return ERR_PARAM;
}
{
const struct iso15693StreamConfig* isoStreamConfig;
struct st25r3916StreamConfig streamConf;
iso15693PhyConfig_t config;
config.coding =
((gRFAL.txBR == RFAL_BR_1p66) ? ISO15693_VCD_CODING_1_256 :
ISO15693_VCD_CODING_1_4);
switch(gRFAL.rxBR) {
case RFAL_BR_52p97:
config.speedMode = 1;
break;
default:
config.speedMode = 0;
break;
}
iso15693PhyConfigure(&config, &isoStreamConfig);
/* MISRA 11.3 - Cannot point directly into different object type, copy to local var */
streamConf.din = isoStreamConfig->din;
streamConf.dout = isoStreamConfig->dout;
streamConf.report_period_length = isoStreamConfig->report_period_length;
streamConf.useBPSK = isoStreamConfig->useBPSK;
st25r3916StreamConfigure(&streamConf);
}
/* Set Analog configurations for this bit rate */
rfalSetAnalogConfig((RFAL_ANALOG_CONFIG_TECH_CHIP | RFAL_ANALOG_CONFIG_CHIP_POLL_COMMON));
rfalSetAnalogConfig( (rfalAnalogConfigId)(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCV | rfalConvBR2ACBR(gRFAL.txBR) | RFAL_ANALOG_CONFIG_TX ) );
rfalSetAnalogConfig( (rfalAnalogConfigId)(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCV | rfalConvBR2ACBR(gRFAL.rxBR) | RFAL_ANALOG_CONFIG_RX ) );
break;
#endif /* RFAL_FEATURE_NFCV */
/*******************************************************************************/
case RFAL_MODE_POLL_ACTIVE_P2P:
/* Set Analog configurations for this bit rate */
rfalSetAnalogConfig((RFAL_ANALOG_CONFIG_TECH_CHIP | RFAL_ANALOG_CONFIG_CHIP_POLL_COMMON));
rfalSetAnalogConfig( (rfalAnalogConfigId)(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_AP2P | rfalConvBR2ACBR(gRFAL.txBR) | RFAL_ANALOG_CONFIG_TX ) );
rfalSetAnalogConfig( (rfalAnalogConfigId)(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_AP2P | rfalConvBR2ACBR(gRFAL.rxBR) | RFAL_ANALOG_CONFIG_RX ) );
break;
/*******************************************************************************/
case RFAL_MODE_LISTEN_ACTIVE_P2P:
/* Set Analog configurations for this bit rate */
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_TECH_CHIP | RFAL_ANALOG_CONFIG_CHIP_LISTEN_COMMON));
rfalSetAnalogConfig( (rfalAnalogConfigId)(RFAL_ANALOG_CONFIG_LISTEN | RFAL_ANALOG_CONFIG_TECH_AP2P | rfalConvBR2ACBR(gRFAL.txBR) | RFAL_ANALOG_CONFIG_TX ) );
rfalSetAnalogConfig( (rfalAnalogConfigId)(RFAL_ANALOG_CONFIG_LISTEN | RFAL_ANALOG_CONFIG_TECH_AP2P | rfalConvBR2ACBR(gRFAL.rxBR) | RFAL_ANALOG_CONFIG_RX ) );
break;
/*******************************************************************************/
case RFAL_MODE_LISTEN_NFCA:
/* Set Analog configurations for this bit rate */
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_TECH_CHIP | RFAL_ANALOG_CONFIG_CHIP_LISTEN_COMMON));
rfalSetAnalogConfig( (rfalAnalogConfigId)(RFAL_ANALOG_CONFIG_LISTEN | RFAL_ANALOG_CONFIG_TECH_NFCA | rfalConvBR2ACBR(gRFAL.txBR) | RFAL_ANALOG_CONFIG_TX ) );
rfalSetAnalogConfig( (rfalAnalogConfigId)(RFAL_ANALOG_CONFIG_LISTEN | RFAL_ANALOG_CONFIG_TECH_NFCA | rfalConvBR2ACBR(gRFAL.rxBR) | RFAL_ANALOG_CONFIG_RX ) );
break;
/*******************************************************************************/
case RFAL_MODE_LISTEN_NFCF:
/* Set Analog configurations for this bit rate */
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_TECH_CHIP | RFAL_ANALOG_CONFIG_CHIP_LISTEN_COMMON));
rfalSetAnalogConfig( (rfalAnalogConfigId)(RFAL_ANALOG_CONFIG_LISTEN | RFAL_ANALOG_CONFIG_TECH_NFCF | rfalConvBR2ACBR(gRFAL.txBR) | RFAL_ANALOG_CONFIG_TX ) );
rfalSetAnalogConfig( (rfalAnalogConfigId)(RFAL_ANALOG_CONFIG_LISTEN | RFAL_ANALOG_CONFIG_TECH_NFCF | rfalConvBR2ACBR(gRFAL.rxBR) | RFAL_ANALOG_CONFIG_RX ) );
break;
/*******************************************************************************/
case RFAL_MODE_LISTEN_NFCB:
case RFAL_MODE_NONE:
return ERR_WRONG_STATE;
/*******************************************************************************/
default:
return ERR_NOT_IMPLEMENTED;
}
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode rfalGetBitRate(rfalBitRate* txBR, rfalBitRate* rxBR) {
if((gRFAL.state == RFAL_STATE_IDLE) || (gRFAL.mode == RFAL_MODE_NONE)) {
return ERR_WRONG_STATE;
}
if(txBR != NULL) {
*txBR = gRFAL.txBR;
}
if(rxBR != NULL) {
*rxBR = gRFAL.rxBR;
}
return ERR_NONE;
}
/*******************************************************************************/
void rfalSetErrorHandling(rfalEHandling eHandling) {
switch(eHandling) {
case RFAL_ERRORHANDLING_NFC:
case RFAL_ERRORHANDLING_NONE:
st25r3916ClrRegisterBits(ST25R3916_REG_EMD_SUP_CONF, ST25R3916_REG_EMD_SUP_CONF_emd_emv);
break;
case RFAL_ERRORHANDLING_EMVCO:
/* MISRA 16.4: no empty default statement (in case RFAL_SW_EMD is defined) */
#ifndef RFAL_SW_EMD
st25r3916ModifyRegister(
ST25R3916_REG_EMD_SUP_CONF,
(ST25R3916_REG_EMD_SUP_CONF_emd_emv | ST25R3916_REG_EMD_SUP_CONF_emd_thld_mask),
(ST25R3916_REG_EMD_SUP_CONF_emd_emv_on | RFAL_EMVCO_RX_MAXLEN));
#endif /* RFAL_SW_EMD */
break;
default:
/* MISRA 16.4: no empty default statement (a comment being enough) */
break;
}
gRFAL.conf.eHandling = eHandling;
}
/*******************************************************************************/
rfalEHandling rfalGetErrorHandling(void) {
return gRFAL.conf.eHandling;
}
/*******************************************************************************/
void rfalSetFDTPoll(uint32_t FDTPoll) {
gRFAL.timings.FDTPoll = MIN(FDTPoll, RFAL_ST25R3916_GPT_MAX_1FC);
}
/*******************************************************************************/
uint32_t rfalGetFDTPoll(void) {
return gRFAL.timings.FDTPoll;
}
/*******************************************************************************/
void rfalSetFDTListen(uint32_t FDTListen) {
gRFAL.timings.FDTListen = MIN(FDTListen, RFAL_ST25R3916_MRT_MAX_1FC);
}
/*******************************************************************************/
uint32_t rfalGetFDTListen(void) {
return gRFAL.timings.FDTListen;
}
/*******************************************************************************/
void rfalSetGT(uint32_t GT) {
gRFAL.timings.GT = MIN(GT, RFAL_ST25R3916_GT_MAX_1FC);
}
/*******************************************************************************/
uint32_t rfalGetGT(void) {
return gRFAL.timings.GT;
}
/*******************************************************************************/
bool rfalIsGTExpired(void) {
if(gRFAL.tmr.GT != RFAL_TIMING_NONE) {
if(!rfalTimerisExpired(gRFAL.tmr.GT)) {
return false;
}
}
return true;
}
/*******************************************************************************/
ReturnCode rfalFieldOnAndStartGT(void) {
ReturnCode ret;
/* Check if RFAL has been initialized (Oscillator should be running) and also
* if a direct register access has been performed and left the Oscillator Off */
if(!st25r3916IsOscOn() || (gRFAL.state < RFAL_STATE_INIT)) {
return ERR_WRONG_STATE;
}
ret = ERR_NONE;
/* Set Analog configurations for Field On event */
rfalSetAnalogConfig((RFAL_ANALOG_CONFIG_TECH_CHIP | RFAL_ANALOG_CONFIG_CHIP_FIELD_ON));
/*******************************************************************************/
/* Perform collision avoidance and turn field On if not already On */
if(!st25r3916IsTxEnabled() || !gRFAL.field) {
/* Set TARFG: 0 (75us+0ms=75us), GT is fulfilled using a SW timer */
st25r3916WriteRegister(ST25R3916_REG_FIELD_ON_GT, 0U);
/* Use Thresholds set by AnalogConfig */
ret = st25r3916PerformCollisionAvoidance(
ST25R3916_CMD_INITIAL_RF_COLLISION,
ST25R3916_THRESHOLD_DO_NOT_SET,
ST25R3916_THRESHOLD_DO_NOT_SET,
gRFAL.timings.nTRFW);
/* n * TRFW timing shall vary Activity 2.1 3.3.1.1 */
gRFAL.timings.nTRFW = rfalGennTRFW(gRFAL.timings.nTRFW);
gRFAL.field = st25r3916IsTxEnabled(); //(ret == ERR_NONE);
/* Only turn on Receiver and Transmitter if field was successfully turned On */
if(gRFAL.field) {
st25r3916TxRxOn(); /* Enable Tx and Rx (Tx is already On)*/
}
}
/*******************************************************************************/
/* Start GT timer in case the GT value is set */
if((gRFAL.timings.GT != RFAL_TIMING_NONE)) {
/* Ensure that a SW timer doesn't have a lower value then the minimum */
rfalTimerStart(
gRFAL.tmr.GT, rfalConv1fcToMs(MAX((gRFAL.timings.GT), RFAL_ST25R3916_GT_MIN_1FC)));
}
return ret;
}
/*******************************************************************************/
ReturnCode rfalFieldOff(void) {
/* Check whether a TxRx is not yet finished */
if(gRFAL.TxRx.state != RFAL_TXRX_STATE_IDLE) {
rfalCleanupTransceive();
}
/* Disable Tx and Rx */
st25r3916TxRxOff();
/* Set Analog configurations for Field Off event */
rfalSetAnalogConfig((RFAL_ANALOG_CONFIG_TECH_CHIP | RFAL_ANALOG_CONFIG_CHIP_FIELD_OFF));
gRFAL.field = false;
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode rfalStartTransceive(const rfalTransceiveContext* ctx) {
uint32_t FxTAdj; /* FWT or FDT adjustment calculation */
/* Check for valid parameters */
if(ctx == NULL) {
return ERR_PARAM;
}
/* Ensure that RFAL is already Initialized and the mode has been set */
if((gRFAL.state >= RFAL_STATE_MODE_SET) /*&& (gRFAL.TxRx.state == RFAL_TXRX_STATE_INIT )*/) {
/*******************************************************************************/
/* Check whether the field is already On, otherwise no TXE will be received */
if(!st25r3916IsTxEnabled() &&
(!rfalIsModePassiveListen(gRFAL.mode) && (ctx->txBuf != NULL))) {
return ERR_WRONG_STATE;
}
gRFAL.TxRx.ctx = *ctx;
/*******************************************************************************/
if(gRFAL.timings.FDTListen != RFAL_TIMING_NONE) {
/* Calculate MRT adjustment accordingly to the current mode */
FxTAdj = RFAL_FDT_LISTEN_MRT_ADJUSTMENT;
if(gRFAL.mode == RFAL_MODE_POLL_NFCA) {
FxTAdj += (uint32_t)RFAL_FDT_LISTEN_A_ADJUSTMENT;
}
if(gRFAL.mode == RFAL_MODE_POLL_NFCA_T1T) {
FxTAdj += (uint32_t)RFAL_FDT_LISTEN_A_ADJUSTMENT;
}
if(gRFAL.mode == RFAL_MODE_POLL_NFCB) {
FxTAdj += (uint32_t)RFAL_FDT_LISTEN_B_ADJUSTMENT;
}
if(gRFAL.mode == RFAL_MODE_POLL_NFCV) {
FxTAdj += (uint32_t)RFAL_FDT_LISTEN_V_ADJUSTMENT;
}
/* Ensure that MRT is using 64/fc steps */
st25r3916ClrRegisterBits(
ST25R3916_REG_TIMER_EMV_CONTROL, ST25R3916_REG_TIMER_EMV_CONTROL_mrt_step);
/* If Correlator is being used further adjustment is required for NFCB */
if((st25r3916CheckReg(ST25R3916_REG_AUX, ST25R3916_REG_AUX_dis_corr, 0x00U)) &&
(gRFAL.mode == RFAL_MODE_POLL_NFCB)) {
FxTAdj += (uint32_t)
RFAL_FDT_LISTEN_B_ADJT_CORR; /* Reduce FDT(Listen) */
st25r3916SetRegisterBits(
ST25R3916_REG_CORR_CONF1,
ST25R3916_REG_CORR_CONF1_corr_s3); /* Ensure BPSK start to 33 pilot pulses */
st25r3916ChangeRegisterBits(
ST25R3916_REG_SUBC_START_TIME,
ST25R3916_REG_SUBC_START_TIME_sst_mask,
RFAL_FDT_LISTEN_B_ADJT_CORR_SST); /* Set sst */
}
/* Set Minimum FDT(Listen) in which PICC is not allowed to send a response */
st25r3916WriteRegister(
ST25R3916_REG_MASK_RX_TIMER,
(uint8_t)rfalConv1fcTo64fc(
(FxTAdj > gRFAL.timings.FDTListen) ? RFAL_ST25R3916_MRT_MIN_1FC :
(gRFAL.timings.FDTListen - FxTAdj)));
}
/*******************************************************************************/
/* FDT Poll will be loaded in rfalPrepareTransceive() once the previous was expired */
/*******************************************************************************/
if((gRFAL.TxRx.ctx.fwt != RFAL_FWT_NONE) && (gRFAL.TxRx.ctx.fwt != 0U)) {
/* Ensure proper timing configuration */
if(gRFAL.timings.FDTListen >= gRFAL.TxRx.ctx.fwt) {
return ERR_PARAM;
}
FxTAdj = RFAL_FWT_ADJUSTMENT;
if(gRFAL.mode == RFAL_MODE_POLL_NFCA) {
FxTAdj += (uint32_t)RFAL_FWT_A_ADJUSTMENT;
}
if(gRFAL.mode == RFAL_MODE_POLL_NFCA_T1T) {
FxTAdj += (uint32_t)RFAL_FWT_A_ADJUSTMENT;
}
if(gRFAL.mode == RFAL_MODE_POLL_NFCB) {
FxTAdj += (uint32_t)RFAL_FWT_B_ADJUSTMENT;
}
if((gRFAL.mode == RFAL_MODE_POLL_NFCF) || (gRFAL.mode == RFAL_MODE_POLL_ACTIVE_P2P)) {
FxTAdj +=
(uint32_t)((gRFAL.txBR == RFAL_BR_212) ? RFAL_FWT_F_212_ADJUSTMENT : RFAL_FWT_F_424_ADJUSTMENT);
}
/* Ensure that the given FWT doesn't exceed NRT maximum */
gRFAL.TxRx.ctx.fwt = MIN((gRFAL.TxRx.ctx.fwt + FxTAdj), RFAL_ST25R3916_NRT_MAX_1FC);
/* Set FWT in the NRT */
st25r3916SetNoResponseTime(rfalConv1fcTo64fc(gRFAL.TxRx.ctx.fwt));
} else {
/* Disable NRT, no NRE will be triggered, therefore wait endlessly for Rx */
st25r3916SetNoResponseTime(RFAL_ST25R3916_NRT_DISABLED);
}
gRFAL.state = RFAL_STATE_TXRX;
gRFAL.TxRx.state = RFAL_TXRX_STATE_TX_IDLE;
gRFAL.TxRx.status = ERR_BUSY;
#if RFAL_FEATURE_NFCV
/*******************************************************************************/
if((RFAL_MODE_POLL_NFCV == gRFAL.mode) ||
(RFAL_MODE_POLL_PICOPASS ==
gRFAL.mode)) { /* Exchange receive buffer with internal buffer */
gRFAL.nfcvData.origCtx = gRFAL.TxRx.ctx;
gRFAL.TxRx.ctx.rxBuf =
((gRFAL.nfcvData.origCtx.rxBuf != NULL) ? gRFAL.nfcvData.codingBuffer : NULL);
gRFAL.TxRx.ctx.rxBufLen =
(uint16_t)rfalConvBytesToBits(sizeof(gRFAL.nfcvData.codingBuffer));
gRFAL.TxRx.ctx.flags =
(uint32_t)RFAL_TXRX_FLAGS_CRC_TX_MANUAL | (uint32_t)RFAL_TXRX_FLAGS_CRC_RX_KEEP |
(uint32_t)RFAL_TXRX_FLAGS_NFCIP1_OFF |
(uint32_t)(gRFAL.nfcvData.origCtx.flags & (uint32_t)RFAL_TXRX_FLAGS_AGC_OFF) |
(uint32_t)RFAL_TXRX_FLAGS_PAR_RX_KEEP | (uint32_t)RFAL_TXRX_FLAGS_PAR_TX_NONE;
/* In NFCV a TxRx with a valid txBuf and txBufSize==0 indicates to send an EOF */
/* Skip logic below that would go directly into receive */
if(gRFAL.TxRx.ctx.txBuf != NULL) {
return ERR_NONE;
}
}
#endif /* RFAL_FEATURE_NFCV */
/*******************************************************************************/
/* Check if the Transceive start performing Tx or goes directly to Rx */
if((gRFAL.TxRx.ctx.txBuf == NULL) || (gRFAL.TxRx.ctx.txBufLen == 0U)) {
/* Clear FIFO, Clear and Enable the Interrupts */
rfalPrepareTransceive();
/* In AP2P check the field status */
if(rfalIsModeActiveComm(gRFAL.mode)) {
/* Disable our field upon a Rx reEnable, and start PPON2 manually */
st25r3916TxOff();
st25r3916ExecuteCommand(ST25R3916_CMD_START_PPON2_TIMER);
}
/* No Tx done, enable the Receiver */
st25r3916ExecuteCommand(ST25R3916_CMD_UNMASK_RECEIVE_DATA);
/* Start NRT manually, if FWT = 0 (wait endlessly for Rx) chip will ignore anyhow */
st25r3916ExecuteCommand(ST25R3916_CMD_START_NO_RESPONSE_TIMER);
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_IDLE;
}
return ERR_NONE;
}
return ERR_WRONG_STATE;
}
/*******************************************************************************/
bool rfalIsTransceiveInTx(void) {
return (
(gRFAL.TxRx.state >= RFAL_TXRX_STATE_TX_IDLE) &&
(gRFAL.TxRx.state < RFAL_TXRX_STATE_RX_IDLE));
}
/*******************************************************************************/
bool rfalIsTransceiveInRx(void) {
return (gRFAL.TxRx.state >= RFAL_TXRX_STATE_RX_IDLE);
}
/*******************************************************************************/
ReturnCode rfalTransceiveBlockingTx(
uint8_t* txBuf,
uint16_t txBufLen,
uint8_t* rxBuf,
uint16_t rxBufLen,
uint16_t* actLen,
uint32_t flags,
uint32_t fwt) {
ReturnCode ret;
rfalTransceiveContext ctx;
rfalCreateByteFlagsTxRxContext(ctx, txBuf, txBufLen, rxBuf, rxBufLen, actLen, flags, fwt);
EXIT_ON_ERR(ret, rfalStartTransceive(&ctx));
return rfalTransceiveRunBlockingTx();
}
ReturnCode rfalTransceiveBitsBlockingTx(
uint8_t* txBuf,
uint16_t txBufLen,
uint8_t* rxBuf,
uint16_t rxBufLen,
uint16_t* actLen,
uint32_t flags,
uint32_t fwt) {
ReturnCode ret;
rfalTransceiveContext ctx = {
.rxBuf = rxBuf,
.rxBufLen = rxBufLen,
.rxRcvdLen = actLen,
.txBuf = txBuf,
.txBufLen = txBufLen,
.flags = flags,
.fwt = fwt,
};
EXIT_ON_ERR(ret, rfalStartTransceive(&ctx));
return rfalTransceiveRunBlockingTx();
}
/*******************************************************************************/
static ReturnCode rfalTransceiveRunBlockingTx(void) {
ReturnCode ret;
do {
rfalWorker();
ret = rfalGetTransceiveStatus();
} while(rfalIsTransceiveInTx() && (ret == ERR_BUSY));
if(rfalIsTransceiveInRx()) {
return ERR_NONE;
}
return ret;
}
/*******************************************************************************/
ReturnCode rfalTransceiveBlockingRx(void) {
ReturnCode ret;
do {
rfalWorker();
ret = rfalGetTransceiveStatus();
} while(rfalIsTransceiveInRx() && (ret == ERR_BUSY));
return ret;
}
/*******************************************************************************/
ReturnCode rfalTransceiveBlockingTxRx(
uint8_t* txBuf,
uint16_t txBufLen,
uint8_t* rxBuf,
uint16_t rxBufLen,
uint16_t* actLen,
uint32_t flags,
uint32_t fwt) {
ReturnCode ret;
EXIT_ON_ERR(
ret, rfalTransceiveBlockingTx(txBuf, txBufLen, rxBuf, rxBufLen, actLen, flags, fwt));
ret = rfalTransceiveBlockingRx();
/* Convert received bits to bytes */
if(actLen != NULL) {
*actLen = rfalConvBitsToBytes(*actLen);
}
return ret;
}
ReturnCode rfalTransceiveBitsBlockingTxRx(
uint8_t* txBuf,
uint16_t txBufLen,
uint8_t* rxBuf,
uint16_t rxBufLen,
uint16_t* actLen,
uint32_t flags,
uint32_t fwt) {
ReturnCode ret;
EXIT_ON_ERR(
ret, rfalTransceiveBitsBlockingTx(txBuf, txBufLen, rxBuf, rxBufLen, actLen, flags, fwt));
ret = rfalTransceiveBlockingRx();
return ret;
}
/*******************************************************************************/
static ReturnCode rfalRunTransceiveWorker(void) {
if(gRFAL.state == RFAL_STATE_TXRX) {
/*******************************************************************************/
/* Check Transceive Sanity Timer has expired */
if(gRFAL.tmr.txRx != RFAL_TIMING_NONE) {
if(rfalTimerisExpired(gRFAL.tmr.txRx)) {
/* If sanity timer has expired abort ongoing transceive and signal error */
gRFAL.TxRx.status = ERR_IO;
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_FAIL;
}
}
/*******************************************************************************/
/* Run Tx or Rx state machines */
if(rfalIsTransceiveInTx()) {
rfalTransceiveTx();
return rfalGetTransceiveStatus();
}
if(rfalIsTransceiveInRx()) {
rfalTransceiveRx();
return rfalGetTransceiveStatus();
}
}
return ERR_WRONG_STATE;
}
/*******************************************************************************/
rfalTransceiveState rfalGetTransceiveState(void) {
return gRFAL.TxRx.state;
}
/*******************************************************************************/
ReturnCode rfalGetTransceiveStatus(void) {
return ((gRFAL.TxRx.state == RFAL_TXRX_STATE_IDLE) ? gRFAL.TxRx.status : ERR_BUSY);
}
/*******************************************************************************/
ReturnCode rfalGetTransceiveRSSI(uint16_t* rssi) {
uint16_t amRSSI;
uint16_t pmRSSI;
bool isSumMode;
if(rssi == NULL) {
return ERR_PARAM;
}
st25r3916GetRSSI(&amRSSI, &pmRSSI);
/* Check if Correlator Summation mode is being used */
isSumMode =
(st25r3916CheckReg(
ST25R3916_REG_CORR_CONF1,
ST25R3916_REG_CORR_CONF1_corr_s4,
ST25R3916_REG_CORR_CONF1_corr_s4) ?
st25r3916CheckReg(ST25R3916_REG_AUX, ST25R3916_REG_AUX_dis_corr, 0x00) :
false);
if(isSumMode) {
/*******************************************************************************/
/* Using SQRT from math.h and float. If due to compiler, resources or performance
* issue this cannot be used, other approaches can be foreseen with less accuracy:
* Use a simpler sqrt algorithm
* *rssi = MAX( amRSSI, pmRSSI );
* *rssi = ( (amRSSI + pmRSSI) / 2);
*/
*rssi = (uint16_t)sqrt(
((double)amRSSI * (double)amRSSI) +
((double)pmRSSI *
(double)
pmRSSI)); /* PRQA S 5209 # MISRA 4.9 - External function (sqrt()) requires double */
} else {
/* Check which channel was used */
*rssi =
(st25r3916CheckReg(
ST25R3916_REG_AUX_DISPLAY,
ST25R3916_REG_AUX_DISPLAY_a_cha,
ST25R3916_REG_AUX_DISPLAY_a_cha) ?
pmRSSI :
amRSSI);
}
return ERR_NONE;
}
/*******************************************************************************/
void rfalWorker(void) {
platformProtectWorker(); /* Protect RFAL Worker/Task/Process */
switch(gRFAL.state) {
case RFAL_STATE_TXRX:
rfalRunTransceiveWorker();
break;
#if RFAL_FEATURE_LISTEN_MODE
case RFAL_STATE_LM:
rfalRunListenModeWorker();
break;
#endif /* RFAL_FEATURE_LISTEN_MODE */
#if RFAL_FEATURE_WAKEUP_MODE
case RFAL_STATE_WUM:
rfalRunWakeUpModeWorker();
break;
#endif /* RFAL_FEATURE_WAKEUP_MODE */
/* Nothing to be done */
default:
/* MISRA 16.4: no empty default statement (a comment being enough) */
break;
}
platformUnprotectWorker(); /* Unprotect RFAL Worker/Task/Process */
}
/*******************************************************************************/
static void rfalErrorHandling(void) {
uint16_t fifoBytesToRead;
fifoBytesToRead = rfalFIFOStatusGetNumBytes();
#ifdef RFAL_SW_EMD
/*******************************************************************************/
/* EMVCo */
/*******************************************************************************/
if(gRFAL.conf.eHandling == RFAL_ERRORHANDLING_EMVCO) {
bool rxHasIncParError;
/*******************************************************************************/
/* EMD Handling - NFC Forum Digital 1.1 4.1.1.1 ; EMVCo v2.5 4.9.2 */
/* ReEnable the receiver on frames with a length < 4 bytes, upon: */
/* - Collision or Framing error detected */
/* - Residual bits are detected (hard framing error) */
/* - Parity error */
/* - CRC error */
/*******************************************************************************/
/* Check if reception has incomplete bytes or parity error */
rxHasIncParError =
(rfalFIFOStatusIsIncompleteByte() ? true :
rfalFIFOStatusIsMissingPar()); /* MISRA 13.5 */
/* In case there are residual bits decrement FIFO bytes */
/* Ensure FIFO contains some byte as the FIFO might be empty upon Framing errors */
if((fifoBytesToRead > 0U) && rxHasIncParError) {
fifoBytesToRead--;
}
if(((gRFAL.fifo.bytesTotal + fifoBytesToRead) < RFAL_EMVCO_RX_MAXLEN) &&
((gRFAL.TxRx.status == ERR_RF_COLLISION) || (gRFAL.TxRx.status == ERR_FRAMING) ||
(gRFAL.TxRx.status == ERR_PAR) || (gRFAL.TxRx.status == ERR_CRC) ||
rxHasIncParError)) {
/* Ignore this reception, ReEnable receiver which also clears the FIFO */
st25r3916ExecuteCommand(ST25R3916_CMD_UNMASK_RECEIVE_DATA);
/* Ensure that the NRT has not expired meanwhile */
if(st25r3916CheckReg(
ST25R3916_REG_NFCIP1_BIT_RATE, ST25R3916_REG_NFCIP1_BIT_RATE_nrt_on, 0x00)) {
if(st25r3916CheckReg(
ST25R3916_REG_AUX_DISPLAY, ST25R3916_REG_AUX_DISPLAY_rx_act, 0x00)) {
/* Abort reception */
st25r3916ExecuteCommand(ST25R3916_CMD_MASK_RECEIVE_DATA);
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_FAIL;
return;
}
}
rfalFIFOStatusClear();
gRFAL.fifo.bytesTotal = 0;
gRFAL.TxRx.status = ERR_BUSY;
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_WAIT_RXS;
}
return;
}
#endif
/*******************************************************************************/
/* ISO14443A Mode */
/*******************************************************************************/
if(gRFAL.mode == RFAL_MODE_POLL_NFCA) {
/*******************************************************************************/
/* If we received a frame with a incomplete byte we`ll raise a specific error *
* ( support for T2T 4 bit ACK / NAK, MIFARE and Kovio ) */
/*******************************************************************************/
if((gRFAL.TxRx.status == ERR_PAR) || (gRFAL.TxRx.status == ERR_CRC)) {
if(rfalFIFOStatusIsIncompleteByte()) {
st25r3916ReadFifo((uint8_t*)(gRFAL.TxRx.ctx.rxBuf), fifoBytesToRead);
if((gRFAL.TxRx.ctx.rxRcvdLen) != NULL) {
*gRFAL.TxRx.ctx.rxRcvdLen = rfalFIFOGetNumIncompleteBits();
}
gRFAL.TxRx.status = ERR_INCOMPLETE_BYTE;
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_FAIL;
}
}
}
}
/*******************************************************************************/
static void rfalCleanupTransceive(void) {
/*******************************************************************************/
/* Transceive flags */
/*******************************************************************************/
/* Restore default settings on NFCIP1 mode, Receiving parity + CRC bits and manual Tx Parity*/
st25r3916ClrRegisterBits(
ST25R3916_REG_ISO14443A_NFC,
(ST25R3916_REG_ISO14443A_NFC_no_tx_par | ST25R3916_REG_ISO14443A_NFC_no_rx_par |
ST25R3916_REG_ISO14443A_NFC_nfc_f0));
/* Restore AGC enabled */
st25r3916SetRegisterBits(ST25R3916_REG_RX_CONF2, ST25R3916_REG_RX_CONF2_agc_en);
/*******************************************************************************/
/*******************************************************************************/
/* Transceive timers */
/*******************************************************************************/
rfalTimerDestroy(gRFAL.tmr.txRx);
rfalTimerDestroy(gRFAL.tmr.RXE);
gRFAL.tmr.txRx = RFAL_TIMING_NONE;
gRFAL.tmr.RXE = RFAL_TIMING_NONE;
/*******************************************************************************/
/*******************************************************************************/
/* Execute Post Transceive Callback */
/*******************************************************************************/
if(gRFAL.callbacks.postTxRx != NULL) {
gRFAL.callbacks.postTxRx(gRFAL.callbacks.ctx);
}
/*******************************************************************************/
}
/*******************************************************************************/
static void rfalPrepareTransceive(void) {
uint32_t maskInterrupts;
uint8_t reg;
/* If we are in RW or AP2P mode */
if(!rfalIsModePassiveListen(gRFAL.mode)) {
/* Reset receive logic with STOP command */
st25r3916ExecuteCommand(ST25R3916_CMD_STOP);
/* Reset Rx Gain */
st25r3916ExecuteCommand(ST25R3916_CMD_RESET_RXGAIN);
} else {
/* In Passive Listen Mode do not use STOP as it stops FDT timer */
st25r3916ExecuteCommand(ST25R3916_CMD_CLEAR_FIFO);
}
/*******************************************************************************/
/* FDT Poll */
/*******************************************************************************/
if(rfalIsModePassiveComm(gRFAL.mode)) /* Passive Comms */
{
/* In Passive communications General Purpose Timer is used to measure FDT Poll */
if(gRFAL.timings.FDTPoll != RFAL_TIMING_NONE) {
/* Configure GPT to start at RX end */
st25r3916SetStartGPTimer(
(uint16_t)rfalConv1fcTo8fc(MIN(
gRFAL.timings.FDTPoll, (gRFAL.timings.FDTPoll - RFAL_FDT_POLL_ADJUSTMENT))),
ST25R3916_REG_TIMER_EMV_CONTROL_gptc_erx);
}
}
/*******************************************************************************/
/* Execute Pre Transceive Callback */
/*******************************************************************************/
if(gRFAL.callbacks.preTxRx != NULL) {
gRFAL.callbacks.preTxRx(gRFAL.callbacks.ctx);
}
/*******************************************************************************/
maskInterrupts =
(ST25R3916_IRQ_MASK_FWL | ST25R3916_IRQ_MASK_TXE | ST25R3916_IRQ_MASK_RXS |
ST25R3916_IRQ_MASK_RXE | ST25R3916_IRQ_MASK_PAR | ST25R3916_IRQ_MASK_CRC |
ST25R3916_IRQ_MASK_ERR1 | ST25R3916_IRQ_MASK_ERR2 | ST25R3916_IRQ_MASK_NRE);
/*******************************************************************************/
/* Transceive flags */
/*******************************************************************************/
reg =
(ST25R3916_REG_ISO14443A_NFC_no_tx_par_off | ST25R3916_REG_ISO14443A_NFC_no_rx_par_off |
ST25R3916_REG_ISO14443A_NFC_nfc_f0_off);
/* Check if NFCIP1 mode is to be enabled */
if((gRFAL.TxRx.ctx.flags & (uint8_t)RFAL_TXRX_FLAGS_NFCIP1_ON) != 0U) {
reg |= ST25R3916_REG_ISO14443A_NFC_nfc_f0;
}
/* Check if Parity check is to be skipped and to keep the parity + CRC bits in FIFO */
if((gRFAL.TxRx.ctx.flags & (uint8_t)RFAL_TXRX_FLAGS_PAR_RX_KEEP) != 0U) {
reg |= ST25R3916_REG_ISO14443A_NFC_no_rx_par;
}
/* Check if automatic Parity bits is to be disabled */
if((gRFAL.TxRx.ctx.flags & (uint8_t)RFAL_TXRX_FLAGS_PAR_TX_NONE) != 0U) {
reg |= ST25R3916_REG_ISO14443A_NFC_no_tx_par;
}
/* Apply current TxRx flags on ISO14443A and NFC 106kb/s Settings Register */
st25r3916ChangeRegisterBits(
ST25R3916_REG_ISO14443A_NFC,
(ST25R3916_REG_ISO14443A_NFC_no_tx_par | ST25R3916_REG_ISO14443A_NFC_no_rx_par |
ST25R3916_REG_ISO14443A_NFC_nfc_f0),
reg);
/* Check if AGC is to be disabled */
if((gRFAL.TxRx.ctx.flags & (uint8_t)RFAL_TXRX_FLAGS_AGC_OFF) != 0U) {
st25r3916ClrRegisterBits(ST25R3916_REG_RX_CONF2, ST25R3916_REG_RX_CONF2_agc_en);
} else {
st25r3916SetRegisterBits(ST25R3916_REG_RX_CONF2, ST25R3916_REG_RX_CONF2_agc_en);
}
/*******************************************************************************/
/*******************************************************************************/
/* EMVCo NRT mode */
/*******************************************************************************/
if(gRFAL.conf.eHandling == RFAL_ERRORHANDLING_EMVCO) {
st25r3916SetRegisterBits(
ST25R3916_REG_TIMER_EMV_CONTROL, ST25R3916_REG_TIMER_EMV_CONTROL_nrt_emv);
maskInterrupts |= ST25R3916_IRQ_MASK_RX_REST;
} else {
st25r3916ClrRegisterBits(
ST25R3916_REG_TIMER_EMV_CONTROL, ST25R3916_REG_TIMER_EMV_CONTROL_nrt_emv);
}
/*******************************************************************************/
/* In Passive Listen mode additionally enable External Field interrupts */
if(rfalIsModePassiveListen(gRFAL.mode)) {
maskInterrupts |=
(ST25R3916_IRQ_MASK_EOF |
ST25R3916_IRQ_MASK_WU_F); /* Enable external Field interrupts to detect Link Loss and SENF_REQ auto responses */
}
/* In Active comms enable also External Field interrupts and set RF Collsion Avoindance */
if(rfalIsModeActiveComm(gRFAL.mode)) {
maskInterrupts |=
(ST25R3916_IRQ_MASK_EOF | ST25R3916_IRQ_MASK_EON | ST25R3916_IRQ_MASK_PPON2 |
ST25R3916_IRQ_MASK_CAT | ST25R3916_IRQ_MASK_CAC);
/* Set n=0 for subsequent RF Collision Avoidance */
st25r3916ChangeRegisterBits(ST25R3916_REG_AUX, ST25R3916_REG_AUX_nfc_n_mask, 0);
}
/*******************************************************************************/
/* Start transceive Sanity Timer if a FWT is used */
if((gRFAL.TxRx.ctx.fwt != RFAL_FWT_NONE) && (gRFAL.TxRx.ctx.fwt != 0U)) {
rfalTimerStart(gRFAL.tmr.txRx, rfalCalcSanityTmr(gRFAL.TxRx.ctx.fwt));
}
/*******************************************************************************/
/*******************************************************************************/
/* Clear and enable these interrupts */
st25r3916GetInterrupt(maskInterrupts);
st25r3916EnableInterrupts(maskInterrupts);
/* Clear FIFO status local copy */
rfalFIFOStatusClear();
}
/*******************************************************************************/
static void rfalTransceiveTx(void) {
volatile uint32_t irqs;
uint16_t tmp;
ReturnCode ret;
/* Supress warning in case NFC-V feature is disabled */
ret = ERR_NONE;
NO_WARNING(ret);
irqs = ST25R3916_IRQ_MASK_NONE;
if(gRFAL.TxRx.state != gRFAL.TxRx.lastState) {
/* rfalLogD( "RFAL: lastSt: %d curSt: %d \r\n", gRFAL.TxRx.lastState, gRFAL.TxRx.state ); */
gRFAL.TxRx.lastState = gRFAL.TxRx.state;
}
switch(gRFAL.TxRx.state) {
/*******************************************************************************/
case RFAL_TXRX_STATE_TX_IDLE:
/* Nothing to do */
gRFAL.TxRx.state = RFAL_TXRX_STATE_TX_WAIT_GT;
/* fall through */
/*******************************************************************************/
case RFAL_TXRX_STATE_TX_WAIT_GT: /* PRQA S 2003 # MISRA 16.3 - Intentional fall through */
if(!rfalIsGTExpired()) {
break;
}
rfalTimerDestroy(gRFAL.tmr.GT);
gRFAL.tmr.GT = RFAL_TIMING_NONE;
gRFAL.TxRx.state = RFAL_TXRX_STATE_TX_WAIT_FDT;
/* fall through */
/*******************************************************************************/
case RFAL_TXRX_STATE_TX_WAIT_FDT: /* PRQA S 2003 # MISRA 16.3 - Intentional fall through */
/* Only in Passive communications GPT is used to measure FDT Poll */
if(rfalIsModePassiveComm(gRFAL.mode)) {
if(st25r3916IsGPTRunning()) {
break;
}
}
gRFAL.TxRx.state = RFAL_TXRX_STATE_TX_TRANSMIT;
/* fall through */
/*******************************************************************************/
case RFAL_TXRX_STATE_TX_TRANSMIT: /* PRQA S 2003 # MISRA 16.3 - Intentional fall through */
/* Clear FIFO, Clear and Enable the Interrupts */
rfalPrepareTransceive();
/* ST25R3916 has a fixed FIFO water level */
gRFAL.fifo.expWL = RFAL_FIFO_OUT_WL;
#if RFAL_FEATURE_NFCV
/*******************************************************************************/
/* In NFC-V streaming mode, the FIFO needs to be loaded with the coded bits */
if((RFAL_MODE_POLL_NFCV == gRFAL.mode) || (RFAL_MODE_POLL_PICOPASS == gRFAL.mode)) {
#if 0
/* Debugging code: output the payload bits by writing into the FIFO and subsequent clearing */
st25r3916WriteFifo(gRFAL.TxRx.ctx.txBuf, rfalConvBitsToBytes(gRFAL.TxRx.ctx.txBufLen));
st25r3916ExecuteCommand( ST25R3916_CMD_CLEAR_FIFO );
#endif
/* Calculate the bytes needed to be Written into FIFO (a incomplete byte will be added as 1byte) */
gRFAL.nfcvData.nfcvOffset = 0;
ret = iso15693VCDCode(
gRFAL.TxRx.ctx.txBuf,
rfalConvBitsToBytes(gRFAL.TxRx.ctx.txBufLen),
(((gRFAL.nfcvData.origCtx.flags & (uint32_t)RFAL_TXRX_FLAGS_CRC_TX_MANUAL) != 0U) ?
false :
true),
(((gRFAL.nfcvData.origCtx.flags & (uint32_t)RFAL_TXRX_FLAGS_NFCV_FLAG_MANUAL) !=
0U) ?
false :
true),
(RFAL_MODE_POLL_PICOPASS == gRFAL.mode),
&gRFAL.fifo.bytesTotal,
&gRFAL.nfcvData.nfcvOffset,
gRFAL.nfcvData.codingBuffer,
MIN((uint16_t)ST25R3916_FIFO_DEPTH, (uint16_t)sizeof(gRFAL.nfcvData.codingBuffer)),
&gRFAL.fifo.bytesWritten);
if((ret != ERR_NONE) && (ret != ERR_AGAIN)) {
gRFAL.TxRx.status = ret;
gRFAL.TxRx.state = RFAL_TXRX_STATE_TX_FAIL;
break;
}
/* Set the number of full bytes and bits to be transmitted */
st25r3916SetNumTxBits((uint16_t)rfalConvBytesToBits(gRFAL.fifo.bytesTotal));
/* Load FIFO with coded bytes */
st25r3916WriteFifo(gRFAL.nfcvData.codingBuffer, gRFAL.fifo.bytesWritten);
}
/*******************************************************************************/
else
#endif /* RFAL_FEATURE_NFCV */
{
/* Calculate the bytes needed to be Written into FIFO (a incomplete byte will be added as 1byte) */
gRFAL.fifo.bytesTotal = (uint16_t)rfalCalcNumBytes(gRFAL.TxRx.ctx.txBufLen);
/* Set the number of full bytes and bits to be transmitted */
st25r3916SetNumTxBits(gRFAL.TxRx.ctx.txBufLen);
/* Load FIFO with total length or FIFO's maximum */
gRFAL.fifo.bytesWritten = MIN(gRFAL.fifo.bytesTotal, ST25R3916_FIFO_DEPTH);
st25r3916WriteFifo(gRFAL.TxRx.ctx.txBuf, gRFAL.fifo.bytesWritten);
}
/*Check if Observation Mode is enabled and set it on ST25R391x */
rfalCheckEnableObsModeTx();
/*******************************************************************************/
/* If we're in Passive Listen mode ensure that the external field is still On */
if(rfalIsModePassiveListen(gRFAL.mode)) {
if(!rfalIsExtFieldOn()) {
gRFAL.TxRx.status = ERR_LINK_LOSS;
gRFAL.TxRx.state = RFAL_TXRX_STATE_TX_FAIL;
break;
}
}
/*******************************************************************************/
/* Trigger/Start transmission */
if((gRFAL.TxRx.ctx.flags & (uint32_t)RFAL_TXRX_FLAGS_CRC_TX_MANUAL) != 0U) {
st25r3916ExecuteCommand(ST25R3916_CMD_TRANSMIT_WITHOUT_CRC);
} else {
st25r3916ExecuteCommand(ST25R3916_CMD_TRANSMIT_WITH_CRC);
}
/* Check if a WL level is expected or TXE should come */
gRFAL.TxRx.state =
((gRFAL.fifo.bytesWritten < gRFAL.fifo.bytesTotal) ? RFAL_TXRX_STATE_TX_WAIT_WL :
RFAL_TXRX_STATE_TX_WAIT_TXE);
break;
/*******************************************************************************/
case RFAL_TXRX_STATE_TX_WAIT_WL:
irqs = st25r3916GetInterrupt((ST25R3916_IRQ_MASK_FWL | ST25R3916_IRQ_MASK_TXE));
if(irqs == ST25R3916_IRQ_MASK_NONE) {
break; /* No interrupt to process */
}
if(((irqs & ST25R3916_IRQ_MASK_FWL) != 0U) && ((irqs & ST25R3916_IRQ_MASK_TXE) == 0U)) {
gRFAL.TxRx.state = RFAL_TXRX_STATE_TX_RELOAD_FIFO;
} else {
gRFAL.TxRx.status = ERR_IO;
gRFAL.TxRx.state = RFAL_TXRX_STATE_TX_FAIL;
break;
}
/* fall through */
/*******************************************************************************/
case RFAL_TXRX_STATE_TX_RELOAD_FIFO: /* PRQA S 2003 # MISRA 16.3 - Intentional fall through */
#if RFAL_FEATURE_NFCV
/*******************************************************************************/
/* In NFC-V streaming mode, the FIFO needs to be loaded with the coded bits */
if((RFAL_MODE_POLL_NFCV == gRFAL.mode) || (RFAL_MODE_POLL_PICOPASS == gRFAL.mode)) {
uint16_t maxLen;
/* Load FIFO with the remaining length or maximum available (which fit on the coding buffer) */
maxLen =
(uint16_t)MIN((gRFAL.fifo.bytesTotal - gRFAL.fifo.bytesWritten), gRFAL.fifo.expWL);
maxLen = (uint16_t)MIN(maxLen, sizeof(gRFAL.nfcvData.codingBuffer));
tmp = 0;
/* Calculate the bytes needed to be Written into FIFO (a incomplete byte will be added as 1byte) */
ret = iso15693VCDCode(
gRFAL.TxRx.ctx.txBuf,
rfalConvBitsToBytes(gRFAL.TxRx.ctx.txBufLen),
(((gRFAL.nfcvData.origCtx.flags & (uint32_t)RFAL_TXRX_FLAGS_CRC_TX_MANUAL) != 0U) ?
false :
true),
(((gRFAL.nfcvData.origCtx.flags & (uint32_t)RFAL_TXRX_FLAGS_NFCV_FLAG_MANUAL) !=
0U) ?
false :
true),
(RFAL_MODE_POLL_PICOPASS == gRFAL.mode),
&gRFAL.fifo.bytesTotal,
&gRFAL.nfcvData.nfcvOffset,
gRFAL.nfcvData.codingBuffer,
maxLen,
&tmp);
if((ret != ERR_NONE) && (ret != ERR_AGAIN)) {
gRFAL.TxRx.status = ret;
gRFAL.TxRx.state = RFAL_TXRX_STATE_TX_FAIL;
break;
}
/* Load FIFO with coded bytes */
st25r3916WriteFifo(gRFAL.nfcvData.codingBuffer, tmp);
}
/*******************************************************************************/
else
#endif /* RFAL_FEATURE_NFCV */
{
/* Load FIFO with the remaining length or maximum available */
tmp = MIN(
(gRFAL.fifo.bytesTotal - gRFAL.fifo.bytesWritten),
gRFAL.fifo.expWL); /* tmp holds the number of bytes written on this iteration */
st25r3916WriteFifo(&gRFAL.TxRx.ctx.txBuf[gRFAL.fifo.bytesWritten], tmp);
}
/* Update total written bytes to FIFO */
gRFAL.fifo.bytesWritten += tmp;
/* Check if a WL level is expected or TXE should come */
gRFAL.TxRx.state =
((gRFAL.fifo.bytesWritten < gRFAL.fifo.bytesTotal) ? RFAL_TXRX_STATE_TX_WAIT_WL :
RFAL_TXRX_STATE_TX_WAIT_TXE);
break;
/*******************************************************************************/
case RFAL_TXRX_STATE_TX_WAIT_TXE:
irqs = st25r3916GetInterrupt((ST25R3916_IRQ_MASK_FWL | ST25R3916_IRQ_MASK_TXE));
if(irqs == ST25R3916_IRQ_MASK_NONE) {
break; /* No interrupt to process */
}
if((irqs & ST25R3916_IRQ_MASK_TXE) != 0U) {
gRFAL.TxRx.state = RFAL_TXRX_STATE_TX_DONE;
} else if((irqs & ST25R3916_IRQ_MASK_FWL) != 0U) {
break; /* Ignore ST25R3916 FIFO WL if total TxLen is already on the FIFO */
} else {
gRFAL.TxRx.status = ERR_IO;
gRFAL.TxRx.state = RFAL_TXRX_STATE_TX_FAIL;
break;
}
/* fall through */
/*******************************************************************************/
case RFAL_TXRX_STATE_TX_DONE: /* PRQA S 2003 # MISRA 16.3 - Intentional fall through */
/* If no rxBuf is provided do not wait/expect Rx */
if(gRFAL.TxRx.ctx.rxBuf == NULL) {
/*Check if Observation Mode was enabled and disable it on ST25R391x */
rfalCheckDisableObsMode();
/* Clean up Transceive */
rfalCleanupTransceive();
gRFAL.TxRx.status = ERR_NONE;
gRFAL.TxRx.state = RFAL_TXRX_STATE_IDLE;
break;
}
rfalCheckEnableObsModeRx();
/* Goto Rx */
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_IDLE;
break;
/*******************************************************************************/
case RFAL_TXRX_STATE_TX_FAIL:
/* Error should be assigned by previous state */
if(gRFAL.TxRx.status == ERR_BUSY) {
gRFAL.TxRx.status = ERR_SYSTEM;
}
/*Check if Observation Mode was enabled and disable it on ST25R391x */
rfalCheckDisableObsMode();
/* Clean up Transceive */
rfalCleanupTransceive();
gRFAL.TxRx.state = RFAL_TXRX_STATE_IDLE;
break;
/*******************************************************************************/
default:
gRFAL.TxRx.status = ERR_SYSTEM;
gRFAL.TxRx.state = RFAL_TXRX_STATE_TX_FAIL;
break;
}
}
/*******************************************************************************/
static void rfalTransceiveRx(void) {
volatile uint32_t irqs;
uint16_t tmp;
uint16_t aux;
irqs = ST25R3916_IRQ_MASK_NONE;
if(gRFAL.TxRx.state != gRFAL.TxRx.lastState) {
/* rfalLogD( "RFAL: lastSt: %d curSt: %d \r\n", gRFAL.TxRx.lastState, gRFAL.TxRx.state ); */
gRFAL.TxRx.lastState = gRFAL.TxRx.state;
}
switch(gRFAL.TxRx.state) {
/*******************************************************************************/
case RFAL_TXRX_STATE_RX_IDLE:
/* Clear rx counters */
gRFAL.fifo.bytesWritten = 0; /* Total bytes written on RxBuffer */
gRFAL.fifo.bytesTotal = 0; /* Total bytes in FIFO will now be from Rx */
if(gRFAL.TxRx.ctx.rxRcvdLen != NULL) {
*gRFAL.TxRx.ctx.rxRcvdLen = 0;
}
gRFAL.TxRx.state =
(rfalIsModeActiveComm(gRFAL.mode) ? RFAL_TXRX_STATE_RX_WAIT_EON :
RFAL_TXRX_STATE_RX_WAIT_RXS);
break;
/*******************************************************************************/
case RFAL_TXRX_STATE_RX_WAIT_RXS:
/*******************************************************************************/
irqs = st25r3916GetInterrupt(
(ST25R3916_IRQ_MASK_RXS | ST25R3916_IRQ_MASK_NRE | ST25R3916_IRQ_MASK_EOF));
if(irqs == ST25R3916_IRQ_MASK_NONE) {
break; /* No interrupt to process */
}
/* Only raise Timeout if NRE is detected with no Rx Start (NRT EMV mode) */
if(((irqs & ST25R3916_IRQ_MASK_NRE) != 0U) && ((irqs & ST25R3916_IRQ_MASK_RXS) == 0U)) {
gRFAL.TxRx.status = ERR_TIMEOUT;
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_FAIL;
break;
}
/* Only raise Link Loss if EOF is detected with no Rx Start */
if(((irqs & ST25R3916_IRQ_MASK_EOF) != 0U) && ((irqs & ST25R3916_IRQ_MASK_RXS) == 0U)) {
/* In AP2P a Field On has already occurred - treat this as timeout | mute */
gRFAL.TxRx.status = (rfalIsModeActiveComm(gRFAL.mode) ? ERR_TIMEOUT : ERR_LINK_LOSS);
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_FAIL;
break;
}
if((irqs & ST25R3916_IRQ_MASK_RXS) != 0U) {
/*******************************************************************************/
/* REMARK: Silicon workaround ST25R3916 Errata #TBD */
/* Rarely on corrupted frames I_rxs gets signaled but I_rxe is not signaled */
/* Use a SW timer to handle an eventual missing RXE */
rfalTimerStart(gRFAL.tmr.RXE, RFAL_NORXE_TOUT);
/*******************************************************************************/
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_WAIT_RXE;
} else {
gRFAL.TxRx.status = ERR_IO;
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_FAIL;
break;
}
/* remove NRE that might appear together (NRT EMV mode), and remove RXS, but keep EOF if present for next state */
irqs &= ~(ST25R3916_IRQ_MASK_RXS | ST25R3916_IRQ_MASK_NRE);
/* fall through */
/*******************************************************************************/
case RFAL_TXRX_STATE_RX_WAIT_RXE: /* PRQA S 2003 # MISRA 16.3 - Intentional fall through */
/*******************************************************************************/
/* REMARK: Silicon workaround ST25R3916 Errata #TBD */
/* ST25R396 may indicate RXS without RXE afterwards, this happens rarely on */
/* corrupted frames. */
/* SW timer is used to timeout upon a missing RXE */
if(rfalTimerisExpired(gRFAL.tmr.RXE)) {
gRFAL.TxRx.status = ERR_FRAMING;
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_FAIL;
}
/*******************************************************************************/
irqs |= st25r3916GetInterrupt(
(ST25R3916_IRQ_MASK_RXE | ST25R3916_IRQ_MASK_FWL | ST25R3916_IRQ_MASK_EOF |
ST25R3916_IRQ_MASK_RX_REST | ST25R3916_IRQ_MASK_WU_F));
if(irqs == ST25R3916_IRQ_MASK_NONE) {
break; /* No interrupt to process */
}
if((irqs & ST25R3916_IRQ_MASK_RX_REST) != 0U) {
/* RX_REST indicates that Receiver has been reseted due to EMD, therefore a RXS + RXE should *
* follow if a good reception is followed within the valid initial timeout */
/* Check whether NRT has expired already, if so signal a timeout */
if(st25r3916GetInterrupt(ST25R3916_IRQ_MASK_NRE) != 0U) {
gRFAL.TxRx.status = ERR_TIMEOUT;
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_FAIL;
break;
}
if(st25r3916CheckReg(
ST25R3916_REG_NFCIP1_BIT_RATE,
ST25R3916_REG_NFCIP1_BIT_RATE_nrt_on,
0)) /* MISRA 13.5 */
{
gRFAL.TxRx.status = ERR_TIMEOUT;
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_FAIL;
break;
}
/* Discard any previous RXS */
st25r3916GetInterrupt(ST25R3916_IRQ_MASK_RXS);
/* Check whether a following reception has already started */
if(st25r3916CheckReg(
ST25R3916_REG_AUX_DISPLAY,
ST25R3916_REG_AUX_DISPLAY_rx_act,
ST25R3916_REG_AUX_DISPLAY_rx_act)) {
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_WAIT_RXE;
break;
}
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_WAIT_RXS;
break;
}
if(((irqs & ST25R3916_IRQ_MASK_FWL) != 0U) && ((irqs & ST25R3916_IRQ_MASK_RXE) == 0U)) {
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_READ_FIFO;
break;
}
/* Automatic responses allowed during TxRx only for the SENSF_REQ */
if((irqs & ST25R3916_IRQ_MASK_WU_F) != 0U) {
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_WAIT_RXS;
break;
}
/* After RXE retrieve and check for any error irqs */
irqs |= st25r3916GetInterrupt(
(ST25R3916_IRQ_MASK_CRC | ST25R3916_IRQ_MASK_PAR | ST25R3916_IRQ_MASK_ERR1 |
ST25R3916_IRQ_MASK_ERR2 | ST25R3916_IRQ_MASK_COL));
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_ERR_CHECK;
/* fall through */
/*******************************************************************************/
case RFAL_TXRX_STATE_RX_ERR_CHECK: /* PRQA S 2003 # MISRA 16.3 - Intentional fall through */
if((irqs & ST25R3916_IRQ_MASK_ERR1) != 0U) {
gRFAL.TxRx.status = ERR_FRAMING;
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_READ_DATA;
/* Check if there's a specific error handling for this */
rfalErrorHandling();
break;
}
/* Discard Soft Framing errors in AP2P and CE */
else if(rfalIsModePassivePoll(gRFAL.mode) && ((irqs & ST25R3916_IRQ_MASK_ERR2) != 0U)) {
gRFAL.TxRx.status = ERR_FRAMING;
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_READ_DATA;
/* Check if there's a specific error handling for this */
rfalErrorHandling();
break;
} else if((irqs & ST25R3916_IRQ_MASK_PAR) != 0U) {
gRFAL.TxRx.status = ERR_PAR;
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_READ_DATA;
/* Check if there's a specific error handling for this */
rfalErrorHandling();
break;
} else if((irqs & ST25R3916_IRQ_MASK_CRC) != 0U) {
gRFAL.TxRx.status = ERR_CRC;
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_READ_DATA;
/* Check if there's a specific error handling for this */
rfalErrorHandling();
break;
} else if((irqs & ST25R3916_IRQ_MASK_COL) != 0U) {
gRFAL.TxRx.status = ERR_RF_COLLISION;
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_READ_DATA;
/* Check if there's a specific error handling for this */
rfalErrorHandling();
break;
} else if(rfalIsModePassiveListen(gRFAL.mode) && ((irqs & ST25R3916_IRQ_MASK_EOF) != 0U)) {
gRFAL.TxRx.status = ERR_LINK_LOSS;
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_FAIL;
break;
} else if((irqs & ST25R3916_IRQ_MASK_RXE) != 0U) {
/* Reception ended without any error indication, *
* check FIFO status for malformed or incomplete frames */
/* Check if the reception ends with an incomplete byte (residual bits) */
if(rfalFIFOStatusIsIncompleteByte()) {
gRFAL.TxRx.status = ERR_INCOMPLETE_BYTE;
}
/* Check if the reception ends missing parity bit */
else if(rfalFIFOStatusIsMissingPar()) {
gRFAL.TxRx.status = ERR_FRAMING;
} else {
/* MISRA 15.7 - Empty else */
}
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_READ_DATA;
} else {
gRFAL.TxRx.status = ERR_IO;
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_FAIL;
break;
}
/* fall through */
/*******************************************************************************/
case RFAL_TXRX_STATE_RX_READ_DATA: /* PRQA S 2003 # MISRA 16.3 - Intentional fall through */
tmp = rfalFIFOStatusGetNumBytes();
/*******************************************************************************/
/* Check if CRC should not be placed in rxBuf */
if(((gRFAL.TxRx.ctx.flags & (uint32_t)RFAL_TXRX_FLAGS_CRC_RX_KEEP) == 0U)) {
/* if received frame was bigger than CRC */
if((uint16_t)(gRFAL.fifo.bytesTotal + tmp) > 0U) {
/* By default CRC will not be placed into the rxBuffer */
if((tmp > RFAL_CRC_LEN)) {
tmp -= RFAL_CRC_LEN;
}
/* If the CRC was already placed into rxBuffer (due to WL interrupt where CRC was already in FIFO Read)
* cannot remove it from rxBuf. Can only remove it from rxBufLen not indicate the presence of CRC */
else if(gRFAL.fifo.bytesTotal > RFAL_CRC_LEN) {
gRFAL.fifo.bytesTotal -= RFAL_CRC_LEN;
} else {
/* MISRA 15.7 - Empty else */
}
}
}
gRFAL.fifo.bytesTotal += tmp; /* add to total bytes counter */
/*******************************************************************************/
/* Check if remaining bytes fit on the rxBuf available */
if(gRFAL.fifo.bytesTotal > rfalConvBitsToBytes(gRFAL.TxRx.ctx.rxBufLen)) {
tmp =
(uint16_t)(rfalConvBitsToBytes(gRFAL.TxRx.ctx.rxBufLen) - gRFAL.fifo.bytesWritten);
/* Transmission errors have precedence over buffer error */
if(gRFAL.TxRx.status == ERR_BUSY) {
gRFAL.TxRx.status = ERR_NOMEM;
}
}
/*******************************************************************************/
/* Retrieve remaining bytes from FIFO to rxBuf, and assign total length rcvd */
st25r3916ReadFifo(&gRFAL.TxRx.ctx.rxBuf[gRFAL.fifo.bytesWritten], tmp);
if(gRFAL.TxRx.ctx.rxRcvdLen != NULL) {
(*gRFAL.TxRx.ctx.rxRcvdLen) = (uint16_t)rfalConvBytesToBits(gRFAL.fifo.bytesTotal);
if(rfalFIFOStatusIsIncompleteByte()) {
(*gRFAL.TxRx.ctx.rxRcvdLen) -=
(RFAL_BITS_IN_BYTE - rfalFIFOGetNumIncompleteBits());
}
}
#if RFAL_FEATURE_NFCV
/*******************************************************************************/
/* Decode sub bit stream into payload bits for NFCV, if no error found so far */
if(((RFAL_MODE_POLL_NFCV == gRFAL.mode) || (RFAL_MODE_POLL_PICOPASS == gRFAL.mode)) &&
(gRFAL.TxRx.status == ERR_BUSY)) {
ReturnCode ret;
uint16_t offset = 0; /* REMARK offset not currently used */
ret = iso15693VICCDecode(
gRFAL.TxRx.ctx.rxBuf,
gRFAL.fifo.bytesTotal,
gRFAL.nfcvData.origCtx.rxBuf,
rfalConvBitsToBytes(gRFAL.nfcvData.origCtx.rxBufLen),
&offset,
gRFAL.nfcvData.origCtx.rxRcvdLen,
gRFAL.nfcvData.ignoreBits,
(RFAL_MODE_POLL_PICOPASS == gRFAL.mode));
if(((ERR_NONE == ret) || (ERR_CRC == ret)) &&
(((uint32_t)RFAL_TXRX_FLAGS_CRC_RX_KEEP & gRFAL.nfcvData.origCtx.flags) == 0U) &&
((*gRFAL.nfcvData.origCtx.rxRcvdLen % RFAL_BITS_IN_BYTE) == 0U) &&
(*gRFAL.nfcvData.origCtx.rxRcvdLen >= rfalConvBytesToBits(RFAL_CRC_LEN))) {
*gRFAL.nfcvData.origCtx.rxRcvdLen -=
(uint16_t)rfalConvBytesToBits(RFAL_CRC_LEN); /* Remove CRC */
}
#if 0
/* Debugging code: output the payload bits by writing into the FIFO and subsequent clearing */
st25r3916WriteFifo(gRFAL.nfcvData.origCtx.rxBuf, rfalConvBitsToBytes( *gRFAL.nfcvData.origCtx.rxRcvdLen));
st25r3916ExecuteCommand( ST25R3916_CMD_CLEAR_FIFO );
#endif
/* Restore original ctx */
gRFAL.TxRx.ctx = gRFAL.nfcvData.origCtx;
gRFAL.TxRx.status = ((ret != ERR_NONE) ? ret : ERR_BUSY);
}
#endif /* RFAL_FEATURE_NFCV */
/*******************************************************************************/
/* If an error as been marked/detected don't fall into to RX_DONE */
if(gRFAL.TxRx.status != ERR_BUSY) {
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_FAIL;
break;
}
if(rfalIsModeActiveComm(gRFAL.mode)) {
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_WAIT_EOF;
break;
}
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_DONE;
/* fall through */
/*******************************************************************************/
case RFAL_TXRX_STATE_RX_DONE: /* PRQA S 2003 # MISRA 16.3 - Intentional fall through */
/*Check if Observation Mode was enabled and disable it on ST25R391x */
rfalCheckDisableObsMode();
/* Clean up Transceive */
rfalCleanupTransceive();
gRFAL.TxRx.status = ERR_NONE;
gRFAL.TxRx.state = RFAL_TXRX_STATE_IDLE;
break;
/*******************************************************************************/
case RFAL_TXRX_STATE_RX_READ_FIFO:
/*******************************************************************************/
/* REMARK: Silicon workaround ST25R3916 Errata #TBD */
/* Rarely on corrupted frames I_rxs gets signaled but I_rxe is not signaled */
/* Use a SW timer to handle an eventual missing RXE */
rfalTimerStart(gRFAL.tmr.RXE, RFAL_NORXE_TOUT);
/*******************************************************************************/
tmp = rfalFIFOStatusGetNumBytes();
gRFAL.fifo.bytesTotal += tmp;
/*******************************************************************************/
/* Calculate the amount of bytes that still fits in rxBuf */
aux =
((gRFAL.fifo.bytesTotal > rfalConvBitsToBytes(gRFAL.TxRx.ctx.rxBufLen)) ?
(rfalConvBitsToBytes(gRFAL.TxRx.ctx.rxBufLen) - gRFAL.fifo.bytesWritten) :
tmp);
/*******************************************************************************/
/* Retrieve incoming bytes from FIFO to rxBuf, and store already read amount */
st25r3916ReadFifo(&gRFAL.TxRx.ctx.rxBuf[gRFAL.fifo.bytesWritten], aux);
gRFAL.fifo.bytesWritten += aux;
/*******************************************************************************/
/* If the bytes already read were not the full FIFO WL, dump the remaining *
* FIFO so that ST25R391x can continue with reception */
if(aux < tmp) {
st25r3916ReadFifo(NULL, (tmp - aux));
}
rfalFIFOStatusClear();
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_WAIT_RXE;
break;
/*******************************************************************************/
case RFAL_TXRX_STATE_RX_FAIL:
/*Check if Observation Mode was enabled and disable it on ST25R391x */
rfalCheckDisableObsMode();
/* Clean up Transceive */
rfalCleanupTransceive();
/* Error should be assigned by previous state */
if(gRFAL.TxRx.status == ERR_BUSY) {
gRFAL.TxRx.status = ERR_SYSTEM;
}
/*rfalLogD( "RFAL: curSt: %d Error: %d \r\n", gRFAL.TxRx.state, gRFAL.TxRx.status );*/
gRFAL.TxRx.state = RFAL_TXRX_STATE_IDLE;
break;
/*******************************************************************************/
case RFAL_TXRX_STATE_RX_WAIT_EON:
irqs = st25r3916GetInterrupt(
(ST25R3916_IRQ_MASK_EON | ST25R3916_IRQ_MASK_NRE | ST25R3916_IRQ_MASK_PPON2));
if(irqs == ST25R3916_IRQ_MASK_NONE) {
break; /* No interrupt to process */
}
if((irqs & ST25R3916_IRQ_MASK_EON) != 0U) {
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_WAIT_RXS;
}
if((irqs & ST25R3916_IRQ_MASK_NRE) != 0U) {
gRFAL.TxRx.status = ERR_TIMEOUT;
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_FAIL;
}
if((irqs & ST25R3916_IRQ_MASK_PPON2) != 0U) {
gRFAL.TxRx.status = ERR_LINK_LOSS;
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_FAIL;
}
break;
/*******************************************************************************/
case RFAL_TXRX_STATE_RX_WAIT_EOF:
irqs = st25r3916GetInterrupt((ST25R3916_IRQ_MASK_CAT | ST25R3916_IRQ_MASK_CAC));
if(irqs == ST25R3916_IRQ_MASK_NONE) {
break; /* No interrupt to process */
}
if((irqs & ST25R3916_IRQ_MASK_CAT) != 0U) {
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_DONE;
} else if((irqs & ST25R3916_IRQ_MASK_CAC) != 0U) {
gRFAL.TxRx.status = ERR_RF_COLLISION;
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_FAIL;
} else {
gRFAL.TxRx.status = ERR_IO;
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_FAIL;
}
break;
/*******************************************************************************/
default:
gRFAL.TxRx.status = ERR_SYSTEM;
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_FAIL;
break;
}
}
/*******************************************************************************/
static void rfalFIFOStatusUpdate(void) {
if(gRFAL.fifo.status[RFAL_FIFO_STATUS_REG2] == RFAL_FIFO_STATUS_INVALID) {
st25r3916ReadMultipleRegisters(
ST25R3916_REG_FIFO_STATUS1, gRFAL.fifo.status, ST25R3916_FIFO_STATUS_LEN);
}
}
/*******************************************************************************/
static void rfalFIFOStatusClear(void) {
gRFAL.fifo.status[RFAL_FIFO_STATUS_REG2] = RFAL_FIFO_STATUS_INVALID;
}
/*******************************************************************************/
static uint16_t rfalFIFOStatusGetNumBytes(void) {
uint16_t result;
rfalFIFOStatusUpdate();
result =
((((uint16_t)gRFAL.fifo.status[RFAL_FIFO_STATUS_REG2] &
ST25R3916_REG_FIFO_STATUS2_fifo_b_mask) >>
ST25R3916_REG_FIFO_STATUS2_fifo_b_shift)
<< RFAL_BITS_IN_BYTE);
result |= (((uint16_t)gRFAL.fifo.status[RFAL_FIFO_STATUS_REG1]) & 0x00FFU);
return result;
}
/*******************************************************************************/
static bool rfalFIFOStatusIsIncompleteByte(void) {
rfalFIFOStatusUpdate();
return (
(gRFAL.fifo.status[RFAL_FIFO_STATUS_REG2] & ST25R3916_REG_FIFO_STATUS2_fifo_lb_mask) !=
0U);
}
/*******************************************************************************/
static bool rfalFIFOStatusIsMissingPar(void) {
rfalFIFOStatusUpdate();
return ((gRFAL.fifo.status[RFAL_FIFO_STATUS_REG2] & ST25R3916_REG_FIFO_STATUS2_np_lb) != 0U);
}
/*******************************************************************************/
static uint8_t rfalFIFOGetNumIncompleteBits(void) {
rfalFIFOStatusUpdate();
return (
(gRFAL.fifo.status[RFAL_FIFO_STATUS_REG2] & ST25R3916_REG_FIFO_STATUS2_fifo_lb_mask) >>
ST25R3916_REG_FIFO_STATUS2_fifo_lb_shift);
}
#if RFAL_FEATURE_NFCA
/*******************************************************************************/
ReturnCode rfalISO14443ATransceiveShortFrame(
rfal14443AShortFrameCmd txCmd,
uint8_t* rxBuf,
uint8_t rxBufLen,
uint16_t* rxRcvdLen,
uint32_t fwt) {
ReturnCode ret;
uint8_t directCmd;
/* Check if RFAL is properly initialized */
if(!st25r3916IsTxEnabled() || (gRFAL.state < RFAL_STATE_MODE_SET) ||
((gRFAL.mode != RFAL_MODE_POLL_NFCA) && (gRFAL.mode != RFAL_MODE_POLL_NFCA_T1T))) {
return ERR_WRONG_STATE;
}
/* Check for valid parameters */
if((rxBuf == NULL) || (rxRcvdLen == NULL) || (fwt == RFAL_FWT_NONE)) {
return ERR_PARAM;
}
/*******************************************************************************/
/* Select the Direct Command to be performed */
switch(txCmd) {
case RFAL_14443A_SHORTFRAME_CMD_WUPA:
directCmd = ST25R3916_CMD_TRANSMIT_WUPA;
break;
case RFAL_14443A_SHORTFRAME_CMD_REQA:
directCmd = ST25R3916_CMD_TRANSMIT_REQA;
break;
default:
return ERR_PARAM;
}
/* Disable CRC while receiving since ATQA has no CRC included */
st25r3916SetRegisterBits(ST25R3916_REG_AUX, ST25R3916_REG_AUX_no_crc_rx);
/*******************************************************************************/
/* Wait for GT and FDT */
while(!rfalIsGTExpired()) { /* MISRA 15.6: mandatory brackets */
};
while(st25r3916IsGPTRunning()) { /* MISRA 15.6: mandatory brackets */
};
rfalTimerDestroy(gRFAL.tmr.GT);
gRFAL.tmr.GT = RFAL_TIMING_NONE;
/*******************************************************************************/
/* Prepare for Transceive, Receive only (bypass Tx states) */
gRFAL.TxRx.ctx.flags =
((uint32_t)RFAL_TXRX_FLAGS_CRC_TX_MANUAL | (uint32_t)RFAL_TXRX_FLAGS_CRC_RX_KEEP);
gRFAL.TxRx.ctx.rxBuf = rxBuf;
gRFAL.TxRx.ctx.rxBufLen = rxBufLen;
gRFAL.TxRx.ctx.rxRcvdLen = rxRcvdLen;
gRFAL.TxRx.ctx.fwt = fwt;
/*******************************************************************************/
/* Load NRT with FWT */
st25r3916SetNoResponseTime(rfalConv1fcTo64fc(
MIN((fwt + RFAL_FWT_ADJUSTMENT + RFAL_FWT_A_ADJUSTMENT), RFAL_ST25R3916_NRT_MAX_1FC)));
if(gRFAL.timings.FDTListen != RFAL_TIMING_NONE) {
/* Ensure that MRT is using 64/fc steps */
st25r3916ClrRegisterBits(
ST25R3916_REG_TIMER_EMV_CONTROL, ST25R3916_REG_TIMER_EMV_CONTROL_mrt_step);
/* Set Minimum FDT(Listen) in which PICC is not allowed to send a response */
st25r3916WriteRegister(
ST25R3916_REG_MASK_RX_TIMER,
(uint8_t)rfalConv1fcTo64fc(
((RFAL_FDT_LISTEN_MRT_ADJUSTMENT + RFAL_FDT_LISTEN_A_ADJUSTMENT) >
gRFAL.timings.FDTListen) ?
RFAL_ST25R3916_MRT_MIN_1FC :
(gRFAL.timings.FDTListen -
(RFAL_FDT_LISTEN_MRT_ADJUSTMENT + RFAL_FDT_LISTEN_A_ADJUSTMENT))));
}
/* In Passive communications General Purpose Timer is used to measure FDT Poll */
if(gRFAL.timings.FDTPoll != RFAL_TIMING_NONE) {
/* Configure GPT to start at RX end */
st25r3916SetStartGPTimer(
(uint16_t)rfalConv1fcTo8fc(
MIN(gRFAL.timings.FDTPoll, (gRFAL.timings.FDTPoll - RFAL_FDT_POLL_ADJUSTMENT))),
ST25R3916_REG_TIMER_EMV_CONTROL_gptc_erx);
}
/*******************************************************************************/
rfalPrepareTransceive();
/* Also enable bit collision interrupt */
st25r3916GetInterrupt(ST25R3916_IRQ_MASK_COL);
st25r3916EnableInterrupts(ST25R3916_IRQ_MASK_COL);
/*Check if Observation Mode is enabled and set it on ST25R391x */
rfalCheckEnableObsModeTx();
/*******************************************************************************/
/* Clear nbtx bits before sending WUPA/REQA - otherwise ST25R3916 will report parity error, Note2 of the register */
st25r3916WriteRegister(ST25R3916_REG_NUM_TX_BYTES2, 0);
/* Send either WUPA or REQA. All affected tags will backscatter ATQA and change to READY state */
st25r3916ExecuteCommand(directCmd);
/* Wait for TXE */
if(st25r3916WaitForInterruptsTimed(
ST25R3916_IRQ_MASK_TXE,
(uint16_t)MAX(rfalConv1fcToMs(fwt), RFAL_ST25R3916_SW_TMR_MIN_1MS)) == 0U) {
ret = ERR_IO;
} else {
/*Check if Observation Mode is enabled and set it on ST25R391x */
rfalCheckEnableObsModeRx();
/* Jump into a transceive Rx state for reception (bypass Tx states) */
gRFAL.state = RFAL_STATE_TXRX;
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_IDLE;
gRFAL.TxRx.status = ERR_BUSY;
/* Execute Transceive Rx blocking */
ret = rfalTransceiveBlockingRx();
}
/* Disable Collision interrupt */
st25r3916DisableInterrupts((ST25R3916_IRQ_MASK_COL));
/* ReEnable CRC on Rx */
st25r3916ClrRegisterBits(ST25R3916_REG_AUX, ST25R3916_REG_AUX_no_crc_rx);
return ret;
}
/*******************************************************************************/
ReturnCode rfalISO14443ATransceiveAnticollisionFrame(
uint8_t* buf,
uint8_t* bytesToSend,
uint8_t* bitsToSend,
uint16_t* rxLength,
uint32_t fwt) {
ReturnCode ret;
rfalTransceiveContext ctx;
uint8_t collByte;
uint8_t collData;
/* Check if RFAL is properly initialized */
if((gRFAL.state < RFAL_STATE_MODE_SET) || (gRFAL.mode != RFAL_MODE_POLL_NFCA)) {
return ERR_WRONG_STATE;
}
/* Check for valid parameters */
if((buf == NULL) || (bytesToSend == NULL) || (bitsToSend == NULL) || (rxLength == NULL)) {
return ERR_PARAM;
}
/*******************************************************************************/
/* Set speficic Analog Config for Anticolission if needed */
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCA |
RFAL_ANALOG_CONFIG_BITRATE_COMMON | RFAL_ANALOG_CONFIG_ANTICOL));
/*******************************************************************************/
/* Enable anti collision to recognise collision in first byte of SENS_REQ */
st25r3916SetRegisterBits(ST25R3916_REG_ISO14443A_NFC, ST25R3916_REG_ISO14443A_NFC_antcl);
/* Disable CRC while receiving */
st25r3916SetRegisterBits(ST25R3916_REG_AUX, ST25R3916_REG_AUX_no_crc_rx);
/*******************************************************************************/
/* Prepare for Transceive */
ctx.flags = ((uint32_t)RFAL_TXRX_FLAGS_CRC_TX_MANUAL | (uint32_t)RFAL_TXRX_FLAGS_CRC_RX_KEEP);
ctx.txBuf = buf;
ctx.txBufLen = (uint16_t)(rfalConvBytesToBits(*bytesToSend) + *bitsToSend);
ctx.rxBuf = &buf[*bytesToSend];
ctx.rxBufLen = (uint16_t)rfalConvBytesToBits(RFAL_ISO14443A_SDD_RES_LEN);
ctx.rxRcvdLen = rxLength;
ctx.fwt = fwt;
/* Disable Automatic Gain Control (AGC) for better detection of collisions if using Coherent Receiver */
ctx.flags |=
(st25r3916CheckReg(
ST25R3916_REG_AUX, ST25R3916_REG_AUX_dis_corr, ST25R3916_REG_AUX_dis_corr) ?
(uint32_t)RFAL_TXRX_FLAGS_AGC_OFF :
0x00U);
rfalStartTransceive(&ctx);
/* Additionally enable bit collision interrupt */
st25r3916GetInterrupt(ST25R3916_IRQ_MASK_COL);
st25r3916EnableInterrupts(ST25R3916_IRQ_MASK_COL);
/*******************************************************************************/
collByte = 0;
/* save the collision byte */
if((*bitsToSend) > 0U) {
buf[(*bytesToSend)] <<= (RFAL_BITS_IN_BYTE - (*bitsToSend));
buf[(*bytesToSend)] >>= (RFAL_BITS_IN_BYTE - (*bitsToSend));
collByte = buf[(*bytesToSend)];
}
/*******************************************************************************/
/* Run Transceive blocking */
ret = rfalTransceiveRunBlockingTx();
if(ret == ERR_NONE) {
ret = rfalTransceiveBlockingRx();
/*******************************************************************************/
if((*bitsToSend) > 0U) {
buf[(*bytesToSend)] >>= (*bitsToSend);
buf[(*bytesToSend)] <<= (*bitsToSend);
buf[(*bytesToSend)] |= collByte;
}
if((ERR_RF_COLLISION == ret)) {
/* read out collision register */
st25r3916ReadRegister(ST25R3916_REG_COLLISION_STATUS, &collData);
(*bytesToSend) =
((collData >> ST25R3916_REG_COLLISION_STATUS_c_byte_shift) &
0x0FU); // 4-bits Byte information
(*bitsToSend) =
((collData >> ST25R3916_REG_COLLISION_STATUS_c_bit_shift) &
0x07U); // 3-bits bit information
}
}
/*******************************************************************************/
/* Disable Collision interrupt */
st25r3916DisableInterrupts((ST25R3916_IRQ_MASK_COL));
/* Disable anti collision again */
st25r3916ClrRegisterBits(ST25R3916_REG_ISO14443A_NFC, ST25R3916_REG_ISO14443A_NFC_antcl);
/* ReEnable CRC on Rx */
st25r3916ClrRegisterBits(ST25R3916_REG_AUX, ST25R3916_REG_AUX_no_crc_rx);
/*******************************************************************************/
/* Restore common Analog configurations for this mode */
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCA | rfalConvBR2ACBR(gRFAL.txBR) |
RFAL_ANALOG_CONFIG_TX));
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCA | rfalConvBR2ACBR(gRFAL.rxBR) |
RFAL_ANALOG_CONFIG_RX));
return ret;
}
#endif /* RFAL_FEATURE_NFCA */
#if RFAL_FEATURE_NFCV
/*******************************************************************************/
ReturnCode rfalISO15693TransceiveAnticollisionFrame(
uint8_t* txBuf,
uint8_t txBufLen,
uint8_t* rxBuf,
uint8_t rxBufLen,
uint16_t* actLen) {
ReturnCode ret;
rfalTransceiveContext ctx;
/* Check if RFAL is properly initialized */
if((gRFAL.state < RFAL_STATE_MODE_SET) || (gRFAL.mode != RFAL_MODE_POLL_NFCV)) {
return ERR_WRONG_STATE;
}
/*******************************************************************************/
/* Set speficic Analog Config for Anticolission if needed */
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCV |
RFAL_ANALOG_CONFIG_BITRATE_COMMON | RFAL_ANALOG_CONFIG_ANTICOL));
/* Ignoring collisions before the UID (RES_FLAG + DSFID) */
gRFAL.nfcvData.ignoreBits = (uint16_t)RFAL_ISO15693_IGNORE_BITS;
/*******************************************************************************/
/* Prepare for Transceive */
ctx.flags =
((txBufLen == 0U) ? (uint32_t)RFAL_TXRX_FLAGS_CRC_TX_MANUAL :
(uint32_t)RFAL_TXRX_FLAGS_CRC_TX_AUTO) |
(uint32_t)RFAL_TXRX_FLAGS_CRC_RX_KEEP | (uint32_t)RFAL_TXRX_FLAGS_AGC_OFF |
((txBufLen == 0U) ?
(uint32_t)RFAL_TXRX_FLAGS_NFCV_FLAG_MANUAL :
(uint32_t)
RFAL_TXRX_FLAGS_NFCV_FLAG_AUTO); /* Disable Automatic Gain Control (AGC) for better detection of collision */
ctx.txBuf = txBuf;
ctx.txBufLen = (uint16_t)rfalConvBytesToBits(txBufLen);
ctx.rxBuf = rxBuf;
ctx.rxBufLen = (uint16_t)rfalConvBytesToBits(rxBufLen);
ctx.rxRcvdLen = actLen;
ctx.fwt = rfalConv64fcTo1fc(ISO15693_FWT);
rfalStartTransceive(&ctx);
/*******************************************************************************/
/* Run Transceive blocking */
ret = rfalTransceiveRunBlockingTx();
if(ret == ERR_NONE) {
ret = rfalTransceiveBlockingRx();
}
/* Check if a Transmission error and received data is less then expected */
if(((ret == ERR_RF_COLLISION) || (ret == ERR_CRC) || (ret == ERR_FRAMING)) &&
(rfalConvBitsToBytes(*ctx.rxRcvdLen) < RFAL_ISO15693_INV_RES_LEN)) {
/* If INVENTORY_RES is shorter than expected, tag is still modulating *
* Ensure that response is complete before next frame */
platformDelay((
uint8_t)((RFAL_ISO15693_INV_RES_LEN - rfalConvBitsToBytes(*ctx.rxRcvdLen)) / ((RFAL_ISO15693_INV_RES_LEN / RFAL_ISO15693_INV_RES_DUR) + 1U)));
}
/* Restore common Analog configurations for this mode */
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCV | rfalConvBR2ACBR(gRFAL.txBR) |
RFAL_ANALOG_CONFIG_TX));
rfalSetAnalogConfig(
(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCV | rfalConvBR2ACBR(gRFAL.rxBR) |
RFAL_ANALOG_CONFIG_RX));
gRFAL.nfcvData.ignoreBits = 0;
return ret;
}
/*******************************************************************************/
ReturnCode
rfalISO15693TransceiveEOFAnticollision(uint8_t* rxBuf, uint8_t rxBufLen, uint16_t* actLen) {
uint8_t dummy;
return rfalISO15693TransceiveAnticollisionFrame(&dummy, 0, rxBuf, rxBufLen, actLen);
}
/*******************************************************************************/
ReturnCode rfalISO15693TransceiveEOF(uint8_t* rxBuf, uint8_t rxBufLen, uint16_t* actLen) {
ReturnCode ret;
uint8_t dummy;
/* Check if RFAL is properly initialized */
if((gRFAL.state < RFAL_STATE_MODE_SET) || (gRFAL.mode != RFAL_MODE_POLL_NFCV)) {
return ERR_WRONG_STATE;
}
/*******************************************************************************/
/* Run Transceive blocking */
ret = rfalTransceiveBlockingTxRx(
&dummy,
0,
rxBuf,
rxBufLen,
actLen,
((uint32_t)RFAL_TXRX_FLAGS_CRC_TX_MANUAL | (uint32_t)RFAL_TXRX_FLAGS_CRC_RX_KEEP |
(uint32_t)RFAL_TXRX_FLAGS_AGC_ON),
rfalConv64fcTo1fc(ISO15693_FWT));
return ret;
}
#endif /* RFAL_FEATURE_NFCV */
#if RFAL_FEATURE_NFCF
/*******************************************************************************/
ReturnCode rfalFeliCaPoll(
rfalFeliCaPollSlots slots,
uint16_t sysCode,
uint8_t reqCode,
rfalFeliCaPollRes* pollResList,
uint8_t pollResListSize,
uint8_t* devicesDetected,
uint8_t* collisionsDetected) {
ReturnCode ret;
uint8_t frame
[RFAL_FELICA_POLL_REQ_LEN - RFAL_FELICA_LEN_LEN]; // LEN is added by ST25R391x automatically
uint16_t actLen;
uint8_t frameIdx;
uint8_t devDetected;
uint8_t colDetected;
rfalEHandling curHandling;
uint8_t nbSlots;
/* Check if RFAL is properly initialized */
if((gRFAL.state < RFAL_STATE_MODE_SET) || (gRFAL.mode != RFAL_MODE_POLL_NFCF)) {
return ERR_WRONG_STATE;
}
frameIdx = 0;
colDetected = 0;
devDetected = 0;
nbSlots = (uint8_t)slots;
/*******************************************************************************/
/* Compute SENSF_REQ frame */
frame[frameIdx++] = (uint8_t)FELICA_CMD_POLLING; /* CMD: SENF_REQ */
frame[frameIdx++] = (uint8_t)(sysCode >> 8); /* System Code (SC) */
frame[frameIdx++] = (uint8_t)(sysCode & 0xFFU); /* System Code (SC) */
frame[frameIdx++] = reqCode; /* Communication Parameter Request (RC)*/
frame[frameIdx++] = nbSlots; /* TimeSlot (TSN) */
/*******************************************************************************/
/* NRT should not stop on reception - Use EMVCo mode to run NRT in nrt_emv *
* ERRORHANDLING_EMVCO has no special handling for NFC-F mode */
curHandling = gRFAL.conf.eHandling;
rfalSetErrorHandling(RFAL_ERRORHANDLING_EMVCO);
/*******************************************************************************/
/* Run transceive blocking,
* Calculate Total Response Time in(64/fc):
* 512 PICC process time + (n * 256 Time Slot duration) */
ret = rfalTransceiveBlockingTx(
frame,
(uint16_t)frameIdx,
(uint8_t*)gRFAL.nfcfData.pollResponses,
RFAL_FELICA_POLL_RES_LEN,
&actLen,
(RFAL_TXRX_FLAGS_DEFAULT),
rfalConv64fcTo1fc(
RFAL_FELICA_POLL_DELAY_TIME +
(RFAL_FELICA_POLL_SLOT_TIME * ((uint32_t)nbSlots + 1U))));
/*******************************************************************************/
/* If Tx OK, Wait for all responses, store them as soon as they appear */
if(ret == ERR_NONE) {
bool timeout;
do {
ret = rfalTransceiveBlockingRx();
if(ret == ERR_TIMEOUT) {
/* Upon timeout the full Poll Delay + (Slot time)*(nbSlots) has expired */
timeout = true;
} else {
/* Reception done, reEnabled Rx for following Slot */
st25r3916ExecuteCommand(ST25R3916_CMD_UNMASK_RECEIVE_DATA);
st25r3916ExecuteCommand(ST25R3916_CMD_RESET_RXGAIN);
/* If the reception was OK, new device found */
if(ret == ERR_NONE) {
devDetected++;
/* Overwrite the Transceive context for the next reception */
gRFAL.TxRx.ctx.rxBuf = (uint8_t*)gRFAL.nfcfData.pollResponses[devDetected];
}
/* If the reception was not OK, mark as collision */
else {
colDetected++;
}
/* Check whether NRT has expired meanwhile */
timeout = st25r3916CheckReg(
ST25R3916_REG_NFCIP1_BIT_RATE, ST25R3916_REG_NFCIP1_BIT_RATE_nrt_on, 0x00);
if(!timeout) {
/* Jump again into transceive Rx state for the following reception */
gRFAL.TxRx.status = ERR_BUSY;
gRFAL.state = RFAL_STATE_TXRX;
gRFAL.TxRx.state = RFAL_TXRX_STATE_RX_IDLE;
}
}
} while(((nbSlots--) != 0U) && !timeout);
}
/*******************************************************************************/
/* Restore NRT to normal mode - back to previous error handling */
rfalSetErrorHandling(curHandling);
/*******************************************************************************/
/* Assign output parameters if requested */
if((pollResList != NULL) && (pollResListSize > 0U) && (devDetected > 0U)) {
ST_MEMCPY(
pollResList,
gRFAL.nfcfData.pollResponses,
(RFAL_FELICA_POLL_RES_LEN * (uint32_t)MIN(pollResListSize, devDetected)));
}
if(devicesDetected != NULL) {
*devicesDetected = devDetected;
}
if(collisionsDetected != NULL) {
*collisionsDetected = colDetected;
}
return (((colDetected != 0U) || (devDetected != 0U)) ? ERR_NONE : ret);
}
#endif /* RFAL_FEATURE_NFCF */
/*****************************************************************************
* Listen Mode *
*****************************************************************************/
/*******************************************************************************/
bool rfalIsExtFieldOn(void) {
return st25r3916IsExtFieldOn();
}
#if RFAL_FEATURE_LISTEN_MODE
/*******************************************************************************/
ReturnCode rfalListenStart(
uint32_t lmMask,
const rfalLmConfPA* confA,
const rfalLmConfPB* confB,
const rfalLmConfPF* confF,
uint8_t* rxBuf,
uint16_t rxBufLen,
uint16_t* rxLen) {
t_rfalPTMem
PTMem; /* PRQA S 0759 # MISRA 19.2 - Allocating Union where members are of the same type, just different names. Thus no problem can occur. */
uint8_t* pPTMem;
uint8_t autoResp;
/* Check if RFAL is initialized */
if(gRFAL.state < RFAL_STATE_INIT) {
return ERR_WRONG_STATE;
}
gRFAL.Lm.state = RFAL_LM_STATE_NOT_INIT;
gRFAL.Lm.mdIrqs = ST25R3916_IRQ_MASK_NONE;
gRFAL.Lm.mdReg =
(ST25R3916_REG_MODE_targ_init | ST25R3916_REG_MODE_om_nfc | ST25R3916_REG_MODE_nfc_ar_off);
/* By default disable all automatic responses */
autoResp =
(ST25R3916_REG_PASSIVE_TARGET_d_106_ac_a | ST25R3916_REG_PASSIVE_TARGET_rfu |
ST25R3916_REG_PASSIVE_TARGET_d_212_424_1r | ST25R3916_REG_PASSIVE_TARGET_d_ac_ap2p);
/*******************************************************************************/
if((lmMask & RFAL_LM_MASK_NFCA) != 0U) {
/* Check if the conf has been provided */
if(confA == NULL) {
return ERR_PARAM;
}
pPTMem = (uint8_t*)PTMem.PTMem_A;
/*******************************************************************************/
/* Check and set supported NFCID Length */
switch(confA->nfcidLen) {
case RFAL_LM_NFCID_LEN_04:
st25r3916ChangeRegisterBits(
ST25R3916_REG_AUX, ST25R3916_REG_AUX_nfc_id_mask, ST25R3916_REG_AUX_nfc_id_4bytes);
break;
case RFAL_LM_NFCID_LEN_07:
st25r3916ChangeRegisterBits(
ST25R3916_REG_AUX, ST25R3916_REG_AUX_nfc_id_mask, ST25R3916_REG_AUX_nfc_id_7bytes);
break;
default:
return ERR_PARAM;
}
/*******************************************************************************/
/* Set NFCID */
ST_MEMCPY(pPTMem, confA->nfcid, RFAL_NFCID1_TRIPLE_LEN);
pPTMem = &pPTMem[RFAL_NFCID1_TRIPLE_LEN]; /* MISRA 18.4 */
/* Set SENS_RES */
ST_MEMCPY(pPTMem, confA->SENS_RES, RFAL_LM_SENS_RES_LEN);
pPTMem = &pPTMem[RFAL_LM_SENS_RES_LEN]; /* MISRA 18.4 */
/* Set SEL_RES */
*pPTMem++ =
((confA->nfcidLen == RFAL_LM_NFCID_LEN_04) ?
(confA->SEL_RES & ~RFAL_LM_NFCID_INCOMPLETE) :
(confA->SEL_RES | RFAL_LM_NFCID_INCOMPLETE));
*pPTMem++ = (confA->SEL_RES & ~RFAL_LM_NFCID_INCOMPLETE);
*pPTMem++ = (confA->SEL_RES & ~RFAL_LM_NFCID_INCOMPLETE);
/* Write into PTMem-A */
st25r3916WritePTMem(PTMem.PTMem_A, ST25R3916_PTM_A_LEN);
/*******************************************************************************/
/* Enable automatic responses for A */
autoResp &= ~ST25R3916_REG_PASSIVE_TARGET_d_106_ac_a;
/* Set Target mode, Bit Rate detection and Listen Mode for NFC-F */
gRFAL.Lm.mdReg |=
(ST25R3916_REG_MODE_targ_targ | ST25R3916_REG_MODE_om3 | ST25R3916_REG_MODE_om0 |
ST25R3916_REG_MODE_nfc_ar_off);
gRFAL.Lm.mdIrqs |=
(ST25R3916_IRQ_MASK_WU_A | ST25R3916_IRQ_MASK_WU_A_X | ST25R3916_IRQ_MASK_RXE_PTA);
}
/*******************************************************************************/
if((lmMask & RFAL_LM_MASK_NFCB) != 0U) {
/* Check if the conf has been provided */
if(confB == NULL) {
return ERR_PARAM;
}
return ERR_NOTSUPP;
}
/*******************************************************************************/
if((lmMask & RFAL_LM_MASK_NFCF) != 0U) {
pPTMem = (uint8_t*)PTMem.PTMem_F;
/* Check if the conf has been provided */
if(confF == NULL) {
return ERR_PARAM;
}
/*******************************************************************************/
/* Set System Code */
ST_MEMCPY(pPTMem, confF->SC, RFAL_LM_SENSF_SC_LEN);
pPTMem = &pPTMem[RFAL_LM_SENSF_SC_LEN]; /* MISRA 18.4 */
/* Set SENSF_RES */
ST_MEMCPY(pPTMem, confF->SENSF_RES, RFAL_LM_SENSF_RES_LEN);
/* Set RD bytes to 0x00 as ST25R3916 cannot support advances features */
pPTMem[RFAL_LM_SENSF_RD0_POS] =
0x00; /* NFC Forum Digital 1.1 Table 46: 0x00 */
pPTMem[RFAL_LM_SENSF_RD1_POS] =
0x00; /* NFC Forum Digital 1.1 Table 47: No automatic bit rates */
pPTMem = &pPTMem[RFAL_LM_SENS_RES_LEN]; /* MISRA 18.4 */
/* Write into PTMem-F */
st25r3916WritePTMemF(PTMem.PTMem_F, ST25R3916_PTM_F_LEN);
/*******************************************************************************/
/* Write 24 TSN "Random" Numbers at first initialization and let it rollover */
if(!gRFAL.Lm.iniFlag) {
pPTMem = (uint8_t*)PTMem.TSN;
*pPTMem++ = 0x12;
*pPTMem++ = 0x34;
*pPTMem++ = 0x56;
*pPTMem++ = 0x78;
*pPTMem++ = 0x9A;
*pPTMem++ = 0xBC;
*pPTMem++ = 0xDF;
*pPTMem++ = 0x21;
*pPTMem++ = 0x43;
*pPTMem++ = 0x65;
*pPTMem++ = 0x87;
*pPTMem++ = 0xA9;
/* Write into PTMem-TSN */
st25r3916WritePTMemTSN(PTMem.TSN, ST25R3916_PTM_TSN_LEN);
}
/*******************************************************************************/
/* Enable automatic responses for F */
autoResp &= ~(ST25R3916_REG_PASSIVE_TARGET_d_212_424_1r);
/* Set Target mode, Bit Rate detection and Listen Mode for NFC-F */
gRFAL.Lm.mdReg |=
(ST25R3916_REG_MODE_targ_targ | ST25R3916_REG_MODE_om3 | ST25R3916_REG_MODE_om2 |
ST25R3916_REG_MODE_nfc_ar_off);
/* In CE NFC-F any data without error will be passed to FIFO, to support CUP */
gRFAL.Lm.mdIrqs |=
(ST25R3916_IRQ_MASK_WU_F | ST25R3916_IRQ_MASK_RXE_PTA | ST25R3916_IRQ_MASK_RXE);
}
/*******************************************************************************/
if((lmMask & RFAL_LM_MASK_ACTIVE_P2P) != 0U) {
/* Enable Reception of P2P frames */
autoResp &= ~(ST25R3916_REG_PASSIVE_TARGET_d_ac_ap2p);
/* Set Target mode, Bit Rate detection and Automatic Response RF Collision Avoidance */
gRFAL.Lm.mdReg |=
(ST25R3916_REG_MODE_targ_targ | ST25R3916_REG_MODE_om3 | ST25R3916_REG_MODE_om2 |
ST25R3916_REG_MODE_om0 | ST25R3916_REG_MODE_nfc_ar_auto_rx);
/* n * TRFW timing shall vary Activity 2.1 3.4.1.1 */
st25r3916ChangeRegisterBits(
ST25R3916_REG_AUX, ST25R3916_REG_AUX_nfc_n_mask, gRFAL.timings.nTRFW);
gRFAL.timings.nTRFW = rfalGennTRFW(gRFAL.timings.nTRFW);
gRFAL.Lm.mdIrqs |= (ST25R3916_IRQ_MASK_RXE);
}
/* Check if one of the modes were selected */
if((gRFAL.Lm.mdReg & ST25R3916_REG_MODE_targ) == ST25R3916_REG_MODE_targ_targ) {
gRFAL.state = RFAL_STATE_LM;
gRFAL.Lm.mdMask = lmMask;
gRFAL.Lm.rxBuf = rxBuf;
gRFAL.Lm.rxBufLen = rxBufLen;
gRFAL.Lm.rxLen = rxLen;
*gRFAL.Lm.rxLen = 0;
gRFAL.Lm.dataFlag = false;
gRFAL.Lm.iniFlag = true;
/* Apply the Automatic Responses configuration */
st25r3916ChangeRegisterBits(
ST25R3916_REG_PASSIVE_TARGET,
(ST25R3916_REG_PASSIVE_TARGET_d_106_ac_a | ST25R3916_REG_PASSIVE_TARGET_rfu |
ST25R3916_REG_PASSIVE_TARGET_d_212_424_1r | ST25R3916_REG_PASSIVE_TARGET_d_ac_ap2p),
autoResp);
/* Disable GPT trigger source */
st25r3916ChangeRegisterBits(
ST25R3916_REG_TIMER_EMV_CONTROL,
ST25R3916_REG_TIMER_EMV_CONTROL_gptc_mask,
ST25R3916_REG_TIMER_EMV_CONTROL_gptc_no_trigger);
/* On Bit Rate Detection Mode ST25R391x will filter incoming frames during MRT time starting on External Field On event, use 512/fc steps */
st25r3916SetRegisterBits(
ST25R3916_REG_TIMER_EMV_CONTROL, ST25R3916_REG_TIMER_EMV_CONTROL_mrt_step_512);
st25r3916WriteRegister(
ST25R3916_REG_MASK_RX_TIMER, (uint8_t)rfalConv1fcTo512fc(RFAL_LM_GT));
/* Restore default settings on NFCIP1 mode, Receiving parity + CRC bits and manual Tx Parity*/
st25r3916ClrRegisterBits(
ST25R3916_REG_ISO14443A_NFC,
(ST25R3916_REG_ISO14443A_NFC_no_tx_par | ST25R3916_REG_ISO14443A_NFC_no_rx_par |
ST25R3916_REG_ISO14443A_NFC_nfc_f0));
/* External Field Detector enabled as Automatics on rfalInitialize() */
/* Set Analog configurations for generic Listen mode */
/* Not on SetState(POWER OFF) as otherwise would be applied on every Field Event */
rfalSetAnalogConfig((RFAL_ANALOG_CONFIG_TECH_CHIP | RFAL_ANALOG_CONFIG_CHIP_LISTEN_ON));
/* Initialize as POWER_OFF and set proper mode in RF Chip */
rfalListenSetState(RFAL_LM_STATE_POWER_OFF);
} else {
return ERR_REQUEST; /* Listen Start called but no mode was enabled */
}
return ERR_NONE;
}
/*******************************************************************************/
static ReturnCode rfalRunListenModeWorker(void) {
volatile uint32_t irqs;
uint8_t tmp;
if(gRFAL.state != RFAL_STATE_LM) {
return ERR_WRONG_STATE;
}
switch(gRFAL.Lm.state) {
/*******************************************************************************/
case RFAL_LM_STATE_POWER_OFF:
irqs = st25r3916GetInterrupt((ST25R3916_IRQ_MASK_EON));
if(irqs == ST25R3916_IRQ_MASK_NONE) {
break; /* No interrupt to process */
}
if((irqs & ST25R3916_IRQ_MASK_EON) != 0U) {
rfalListenSetState(RFAL_LM_STATE_IDLE);
} else {
break;
}
/* fall through */
/*******************************************************************************/
case RFAL_LM_STATE_IDLE: /* PRQA S 2003 # MISRA 16.3 - Intentional fall through */
irqs = st25r3916GetInterrupt(
(ST25R3916_IRQ_MASK_NFCT | ST25R3916_IRQ_MASK_WU_F | ST25R3916_IRQ_MASK_RXE |
ST25R3916_IRQ_MASK_EOF | ST25R3916_IRQ_MASK_RXE_PTA));
if(irqs == ST25R3916_IRQ_MASK_NONE) {
break; /* No interrupt to process */
}
if((irqs & ST25R3916_IRQ_MASK_NFCT) != 0U) {
/* Retrieve detected bitrate */
uint8_t newBr;
st25r3916ReadRegister(ST25R3916_REG_NFCIP1_BIT_RATE, &newBr);
newBr >>= ST25R3916_REG_NFCIP1_BIT_RATE_nfc_rate_shift;
if(newBr > ST25R3916_REG_BIT_RATE_rxrate_424) {
newBr = ST25R3916_REG_BIT_RATE_rxrate_424;
}
gRFAL.Lm.brDetected =
(rfalBitRate)(newBr); /* PRQA S 4342 # MISRA 10.5 - Guaranteed that no invalid enum values may be created. See also equalityGuard_RFAL_BR_106 ff.*/
}
if(((irqs & ST25R3916_IRQ_MASK_WU_F) != 0U) && (gRFAL.Lm.brDetected != RFAL_BR_KEEP)) {
rfalListenSetState(RFAL_LM_STATE_READY_F);
} else if(((irqs & ST25R3916_IRQ_MASK_RXE) != 0U) && (gRFAL.Lm.brDetected != RFAL_BR_KEEP)) {
irqs = st25r3916GetInterrupt(
(ST25R3916_IRQ_MASK_WU_F | ST25R3916_IRQ_MASK_RXE | ST25R3916_IRQ_MASK_EOF |
ST25R3916_IRQ_MASK_CRC | ST25R3916_IRQ_MASK_PAR | ST25R3916_IRQ_MASK_ERR2 |
ST25R3916_IRQ_MASK_ERR1));
if(((irqs & ST25R3916_IRQ_MASK_CRC) != 0U) ||
((irqs & ST25R3916_IRQ_MASK_PAR) != 0U) ||
((irqs & ST25R3916_IRQ_MASK_ERR1) != 0U)) {
st25r3916ExecuteCommand(ST25R3916_CMD_CLEAR_FIFO);
st25r3916ExecuteCommand(ST25R3916_CMD_UNMASK_RECEIVE_DATA);
st25r3916TxOff();
break; /* A bad reception occurred, remain in same state */
}
/* Retrieve received data */
*gRFAL.Lm.rxLen = st25r3916GetNumFIFOBytes();
st25r3916ReadFifo(
gRFAL.Lm.rxBuf, MIN(*gRFAL.Lm.rxLen, rfalConvBitsToBytes(gRFAL.Lm.rxBufLen)));
/*******************************************************************************/
/* REMARK: Silicon workaround ST25R3916 Errata #TBD */
/* In bitrate detection mode CRC is now checked for NFC-A frames */
if((*gRFAL.Lm.rxLen > RFAL_CRC_LEN) && (gRFAL.Lm.brDetected == RFAL_BR_106)) {
if(rfalCrcCalculateCcitt(
RFAL_ISO14443A_CRC_INTVAL, gRFAL.Lm.rxBuf, *gRFAL.Lm.rxLen) != 0U) {
st25r3916ExecuteCommand(ST25R3916_CMD_CLEAR_FIFO);
st25r3916ExecuteCommand(ST25R3916_CMD_UNMASK_RECEIVE_DATA);
st25r3916TxOff();
break; /* A bad reception occurred, remain in same state */
}
}
/*******************************************************************************/
/* Check if the data we got has at least the CRC and remove it, otherwise leave at 0 */
*gRFAL.Lm.rxLen -= ((*gRFAL.Lm.rxLen > RFAL_CRC_LEN) ? RFAL_CRC_LEN : *gRFAL.Lm.rxLen);
*gRFAL.Lm.rxLen = (uint16_t)rfalConvBytesToBits(*gRFAL.Lm.rxLen);
gRFAL.Lm.dataFlag = true;
/*Check if Observation Mode was enabled and disable it on ST25R391x */
rfalCheckDisableObsMode();
} else if(
((irqs & ST25R3916_IRQ_MASK_RXE_PTA) != 0U) && (gRFAL.Lm.brDetected != RFAL_BR_KEEP)) {
if(((gRFAL.Lm.mdMask & RFAL_LM_MASK_NFCA) != 0U) &&
(gRFAL.Lm.brDetected == RFAL_BR_106)) {
st25r3916ReadRegister(ST25R3916_REG_PASSIVE_TARGET_STATUS, &tmp);
if(tmp > ST25R3916_REG_PASSIVE_TARGET_STATUS_pta_st_idle) {
rfalListenSetState(RFAL_LM_STATE_READY_A);
}
}
} else if(((irqs & ST25R3916_IRQ_MASK_EOF) != 0U) && (!gRFAL.Lm.dataFlag)) {
rfalListenSetState(RFAL_LM_STATE_POWER_OFF);
} else {
/* MISRA 15.7 - Empty else */
}
break;
/*******************************************************************************/
case RFAL_LM_STATE_READY_F:
irqs = st25r3916GetInterrupt(
(ST25R3916_IRQ_MASK_WU_F | ST25R3916_IRQ_MASK_RXE | ST25R3916_IRQ_MASK_EOF));
if(irqs == ST25R3916_IRQ_MASK_NONE) {
break; /* No interrupt to process */
}
if((irqs & ST25R3916_IRQ_MASK_WU_F) != 0U) {
break;
} else if((irqs & ST25R3916_IRQ_MASK_RXE) != 0U) {
/* Retrieve the error flags/irqs */
irqs |= st25r3916GetInterrupt(
(ST25R3916_IRQ_MASK_CRC | ST25R3916_IRQ_MASK_ERR2 | ST25R3916_IRQ_MASK_ERR1));
if(((irqs & ST25R3916_IRQ_MASK_CRC) != 0U) ||
((irqs & ST25R3916_IRQ_MASK_ERR1) != 0U)) {
st25r3916ExecuteCommand(ST25R3916_CMD_CLEAR_FIFO);
st25r3916ExecuteCommand(ST25R3916_CMD_UNMASK_RECEIVE_DATA);
break; /* A bad reception occurred, remain in same state */
}
/* Retrieve received data */
*gRFAL.Lm.rxLen = st25r3916GetNumFIFOBytes();
st25r3916ReadFifo(
gRFAL.Lm.rxBuf, MIN(*gRFAL.Lm.rxLen, rfalConvBitsToBytes(gRFAL.Lm.rxBufLen)));
/* Check if the data we got has at least the CRC and remove it, otherwise leave at 0 */
*gRFAL.Lm.rxLen -= ((*gRFAL.Lm.rxLen > RFAL_CRC_LEN) ? RFAL_CRC_LEN : *gRFAL.Lm.rxLen);
*gRFAL.Lm.rxLen = (uint16_t)rfalConvBytesToBits(*gRFAL.Lm.rxLen);
gRFAL.Lm.dataFlag = true;
} else if((irqs & ST25R3916_IRQ_MASK_EOF) != 0U) {
rfalListenSetState(RFAL_LM_STATE_POWER_OFF);
} else {
/* MISRA 15.7 - Empty else */
}
break;
/*******************************************************************************/
case RFAL_LM_STATE_READY_A:
irqs = st25r3916GetInterrupt((ST25R3916_IRQ_MASK_EOF | ST25R3916_IRQ_MASK_WU_A));
if(irqs == ST25R3916_IRQ_MASK_NONE) {
break; /* No interrupt to process */
}
if((irqs & ST25R3916_IRQ_MASK_WU_A) != 0U) {
rfalListenSetState(RFAL_LM_STATE_ACTIVE_A);
} else if((irqs & ST25R3916_IRQ_MASK_EOF) != 0U) {
rfalListenSetState(RFAL_LM_STATE_POWER_OFF);
} else {
/* MISRA 15.7 - Empty else */
}
break;
/*******************************************************************************/
case RFAL_LM_STATE_ACTIVE_A:
case RFAL_LM_STATE_ACTIVE_Ax:
irqs = st25r3916GetInterrupt((ST25R3916_IRQ_MASK_RXE | ST25R3916_IRQ_MASK_EOF));
if(irqs == ST25R3916_IRQ_MASK_NONE) {
break; /* No interrupt to process */
}
if((irqs & ST25R3916_IRQ_MASK_RXE) != 0U) {
/* Retrieve the error flags/irqs */
irqs |= st25r3916GetInterrupt(
(ST25R3916_IRQ_MASK_PAR | ST25R3916_IRQ_MASK_CRC | ST25R3916_IRQ_MASK_ERR2 |
ST25R3916_IRQ_MASK_ERR1));
*gRFAL.Lm.rxLen = st25r3916GetNumFIFOBytes();
if(((irqs & ST25R3916_IRQ_MASK_CRC) != 0U) ||
((irqs & ST25R3916_IRQ_MASK_ERR1) != 0U) ||
((irqs & ST25R3916_IRQ_MASK_PAR) != 0U) || (*gRFAL.Lm.rxLen <= RFAL_CRC_LEN)) {
/* Clear rx context and FIFO */
*gRFAL.Lm.rxLen = 0;
st25r3916ExecuteCommand(ST25R3916_CMD_CLEAR_FIFO);
st25r3916ExecuteCommand(ST25R3916_CMD_UNMASK_RECEIVE_DATA);
/* Check if we should go to IDLE or Sleep */
if(gRFAL.Lm.state == RFAL_LM_STATE_ACTIVE_Ax) {
rfalListenSleepStart(
RFAL_LM_STATE_SLEEP_A, gRFAL.Lm.rxBuf, gRFAL.Lm.rxBufLen, gRFAL.Lm.rxLen);
} else {
rfalListenSetState(RFAL_LM_STATE_IDLE);
}
st25r3916DisableInterrupts(ST25R3916_IRQ_MASK_RXE);
break;
}
/* Remove CRC from length */
*gRFAL.Lm.rxLen -= RFAL_CRC_LEN;
/* Retrieve received data */
st25r3916ReadFifo(
gRFAL.Lm.rxBuf, MIN(*gRFAL.Lm.rxLen, rfalConvBitsToBytes(gRFAL.Lm.rxBufLen)));
*gRFAL.Lm.rxLen = (uint16_t)rfalConvBytesToBits(*gRFAL.Lm.rxLen);
gRFAL.Lm.dataFlag = true;
} else if((irqs & ST25R3916_IRQ_MASK_EOF) != 0U) {
rfalListenSetState(RFAL_LM_STATE_POWER_OFF);
} else {
/* MISRA 15.7 - Empty else */
}
break;
/*******************************************************************************/
case RFAL_LM_STATE_SLEEP_A:
case RFAL_LM_STATE_SLEEP_B:
case RFAL_LM_STATE_SLEEP_AF:
irqs = st25r3916GetInterrupt(
(ST25R3916_IRQ_MASK_NFCT | ST25R3916_IRQ_MASK_WU_F | ST25R3916_IRQ_MASK_RXE |
ST25R3916_IRQ_MASK_EOF | ST25R3916_IRQ_MASK_RXE_PTA));
if(irqs == ST25R3916_IRQ_MASK_NONE) {
break; /* No interrupt to process */
}
if((irqs & ST25R3916_IRQ_MASK_NFCT) != 0U) {
uint8_t newBr;
/* Retrieve detected bitrate */
st25r3916ReadRegister(ST25R3916_REG_NFCIP1_BIT_RATE, &newBr);
newBr >>= ST25R3916_REG_NFCIP1_BIT_RATE_nfc_rate_shift;
if(newBr > ST25R3916_REG_BIT_RATE_rxrate_424) {
newBr = ST25R3916_REG_BIT_RATE_rxrate_424;
}
gRFAL.Lm.brDetected =
(rfalBitRate)(newBr); /* PRQA S 4342 # MISRA 10.5 - Guaranteed that no invalid enum values may be created. See also equalityGuard_RFAL_BR_106 ff.*/
}
if(((irqs & ST25R3916_IRQ_MASK_WU_F) != 0U) && (gRFAL.Lm.brDetected != RFAL_BR_KEEP)) {
rfalListenSetState(RFAL_LM_STATE_READY_F);
} else if(((irqs & ST25R3916_IRQ_MASK_RXE) != 0U) && (gRFAL.Lm.brDetected != RFAL_BR_KEEP)) {
/* Clear rx context and FIFO */
*gRFAL.Lm.rxLen = 0;
st25r3916ExecuteCommand(ST25R3916_CMD_CLEAR_FIFO);
st25r3916ExecuteCommand(ST25R3916_CMD_UNMASK_RECEIVE_DATA);
/* REMARK: In order to support CUP or proprietary frames, handling could be added here */
} else if(
((irqs & ST25R3916_IRQ_MASK_RXE_PTA) != 0U) && (gRFAL.Lm.brDetected != RFAL_BR_KEEP)) {
if(((gRFAL.Lm.mdMask & RFAL_LM_MASK_NFCA) != 0U) &&
(gRFAL.Lm.brDetected == RFAL_BR_106)) {
st25r3916ReadRegister(ST25R3916_REG_PASSIVE_TARGET_STATUS, &tmp);
if(tmp > ST25R3916_REG_PASSIVE_TARGET_STATUS_pta_st_halt) {
rfalListenSetState(RFAL_LM_STATE_READY_Ax);
}
}
} else if((irqs & ST25R3916_IRQ_MASK_EOF) != 0U) {
rfalListenSetState(RFAL_LM_STATE_POWER_OFF);
} else {
/* MISRA 15.7 - Empty else */
}
break;
/*******************************************************************************/
case RFAL_LM_STATE_READY_Ax:
irqs = st25r3916GetInterrupt((ST25R3916_IRQ_MASK_EOF | ST25R3916_IRQ_MASK_WU_A_X));
if(irqs == ST25R3916_IRQ_MASK_NONE) {
break; /* No interrupt to process */
}
if((irqs & ST25R3916_IRQ_MASK_WU_A_X) != 0U) {
rfalListenSetState(RFAL_LM_STATE_ACTIVE_Ax);
} else if((irqs & ST25R3916_IRQ_MASK_EOF) != 0U) {
rfalListenSetState(RFAL_LM_STATE_POWER_OFF);
} else {
/* MISRA 15.7 - Empty else */
}
break;
/*******************************************************************************/
case RFAL_LM_STATE_CARDEMU_4A:
case RFAL_LM_STATE_CARDEMU_4B:
case RFAL_LM_STATE_CARDEMU_3:
case RFAL_LM_STATE_TARGET_F:
case RFAL_LM_STATE_TARGET_A:
break;
/*******************************************************************************/
default:
return ERR_WRONG_STATE;
}
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode rfalListenStop(void) {
/* Check if RFAL is initialized */
if(gRFAL.state < RFAL_STATE_INIT) {
return ERR_WRONG_STATE;
}
gRFAL.Lm.state = RFAL_LM_STATE_NOT_INIT;
/*Check if Observation Mode was enabled and disable it on ST25R391x */
rfalCheckDisableObsMode();
/* Re-Enable the Oscillator if not running */
st25r3916OscOn();
/* Disable Receiver and Transmitter */
rfalFieldOff();
/* Disable all automatic responses */
st25r3916SetRegisterBits(
ST25R3916_REG_PASSIVE_TARGET,
(ST25R3916_REG_PASSIVE_TARGET_d_212_424_1r | ST25R3916_REG_PASSIVE_TARGET_rfu |
ST25R3916_REG_PASSIVE_TARGET_d_106_ac_a | ST25R3916_REG_PASSIVE_TARGET_d_ac_ap2p));
/* As there's no Off mode, set default value: ISO14443A with automatic RF Collision Avoidance Off */
st25r3916WriteRegister(
ST25R3916_REG_MODE,
(ST25R3916_REG_MODE_om_iso14443a | ST25R3916_REG_MODE_tr_am_ook |
ST25R3916_REG_MODE_nfc_ar_off));
st25r3916DisableInterrupts(
(ST25R3916_IRQ_MASK_RXE_PTA | ST25R3916_IRQ_MASK_WU_F | ST25R3916_IRQ_MASK_WU_A |
ST25R3916_IRQ_MASK_WU_A_X | ST25R3916_IRQ_MASK_RFU2 | ST25R3916_IRQ_MASK_OSC));
st25r3916GetInterrupt(
(ST25R3916_IRQ_MASK_RXE_PTA | ST25R3916_IRQ_MASK_WU_F | ST25R3916_IRQ_MASK_WU_A |
ST25R3916_IRQ_MASK_WU_A_X | ST25R3916_IRQ_MASK_RFU2));
/* Set Analog configurations for Listen Off event */
rfalSetAnalogConfig((RFAL_ANALOG_CONFIG_TECH_CHIP | RFAL_ANALOG_CONFIG_CHIP_LISTEN_OFF));
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode
rfalListenSleepStart(rfalLmState sleepSt, uint8_t* rxBuf, uint16_t rxBufLen, uint16_t* rxLen) {
/* Check if RFAL is not initialized */
if(gRFAL.state < RFAL_STATE_INIT) {
return ERR_WRONG_STATE;
}
switch(sleepSt) {
/*******************************************************************************/
case RFAL_LM_STATE_SLEEP_A:
/* Enable automatic responses for A */
st25r3916ClrRegisterBits(
ST25R3916_REG_PASSIVE_TARGET, (ST25R3916_REG_PASSIVE_TARGET_d_106_ac_a));
/* Reset NFCA target */
st25r3916ExecuteCommand(ST25R3916_CMD_GOTO_SLEEP);
/* Set Target mode, Bit Rate detection and Listen Mode for NFC-A */
st25r3916ChangeRegisterBits(
ST25R3916_REG_MODE,
(ST25R3916_REG_MODE_targ | ST25R3916_REG_MODE_om_mask |
ST25R3916_REG_MODE_nfc_ar_mask),
(ST25R3916_REG_MODE_targ_targ | ST25R3916_REG_MODE_om3 | ST25R3916_REG_MODE_om0 |
ST25R3916_REG_MODE_nfc_ar_off));
break;
/*******************************************************************************/
case RFAL_LM_STATE_SLEEP_AF:
/* Enable automatic responses for A + F */
st25r3916ClrRegisterBits(
ST25R3916_REG_PASSIVE_TARGET,
(ST25R3916_REG_PASSIVE_TARGET_d_212_424_1r | ST25R3916_REG_PASSIVE_TARGET_d_106_ac_a));
/* Reset NFCA target state */
st25r3916ExecuteCommand(ST25R3916_CMD_GOTO_SLEEP);
/* Set Target mode, Bit Rate detection, Listen Mode for NFC-A and NFC-F */
st25r3916ChangeRegisterBits(
ST25R3916_REG_MODE,
(ST25R3916_REG_MODE_targ | ST25R3916_REG_MODE_om_mask |
ST25R3916_REG_MODE_nfc_ar_mask),
(ST25R3916_REG_MODE_targ_targ | ST25R3916_REG_MODE_om3 | ST25R3916_REG_MODE_om2 |
ST25R3916_REG_MODE_om0 | ST25R3916_REG_MODE_nfc_ar_off));
break;
/*******************************************************************************/
case RFAL_LM_STATE_SLEEP_B:
/* REMARK: Support for CE-B would be added here */
return ERR_NOT_IMPLEMENTED;
/*******************************************************************************/
default:
return ERR_PARAM;
}
/* Ensure that the NFCIP1 mode is disabled */
st25r3916ClrRegisterBits(ST25R3916_REG_ISO14443A_NFC, ST25R3916_REG_ISO14443A_NFC_nfc_f0);
st25r3916ExecuteCommand(ST25R3916_CMD_UNMASK_RECEIVE_DATA);
/* Clear and enable required IRQs */
st25r3916ClearAndEnableInterrupts(
(ST25R3916_IRQ_MASK_NFCT | ST25R3916_IRQ_MASK_RXS | ST25R3916_IRQ_MASK_CRC |
ST25R3916_IRQ_MASK_ERR1 | ST25R3916_IRQ_MASK_ERR2 | ST25R3916_IRQ_MASK_PAR |
ST25R3916_IRQ_MASK_EON | ST25R3916_IRQ_MASK_EOF | gRFAL.Lm.mdIrqs));
/* Check whether the field was turn off right after the Sleep request */
if(!rfalIsExtFieldOn()) {
/*rfalLogD( "RFAL: curState: %02X newState: %02X \r\n", gRFAL.Lm.state, RFAL_LM_STATE_NOT_INIT );*/
rfalListenStop();
return ERR_LINK_LOSS;
}
/*rfalLogD( "RFAL: curState: %02X newState: %02X \r\n", gRFAL.Lm.state, sleepSt );*/
/* Set the new Sleep State*/
gRFAL.Lm.state = sleepSt;
gRFAL.state = RFAL_STATE_LM;
gRFAL.Lm.rxBuf = rxBuf;
gRFAL.Lm.rxBufLen = rxBufLen;
gRFAL.Lm.rxLen = rxLen;
*gRFAL.Lm.rxLen = 0;
gRFAL.Lm.dataFlag = false;
return ERR_NONE;
}
/*******************************************************************************/
rfalLmState rfalListenGetState(bool* dataFlag, rfalBitRate* lastBR) {
/* Allow state retrieval even if gRFAL.state != RFAL_STATE_LM so *
* that this Lm state can be used by caller after activation */
if(lastBR != NULL) {
*lastBR = gRFAL.Lm.brDetected;
}
if(dataFlag != NULL) {
*dataFlag = gRFAL.Lm.dataFlag;
}
return gRFAL.Lm.state;
}
/*******************************************************************************/
ReturnCode rfalListenSetState(rfalLmState newSt) {
ReturnCode ret;
rfalLmState newState;
bool reSetState;
/* Check if RFAL is initialized */
if(gRFAL.state < RFAL_STATE_INIT) {
return ERR_WRONG_STATE;
}
/* SetState clears the Data flag */
gRFAL.Lm.dataFlag = false;
newState = newSt;
ret = ERR_NONE;
do {
reSetState = false;
/*******************************************************************************/
switch(newState) {
/*******************************************************************************/
case RFAL_LM_STATE_POWER_OFF:
/* Enable the receiver and reset logic */
st25r3916SetRegisterBits(ST25R3916_REG_OP_CONTROL, ST25R3916_REG_OP_CONTROL_rx_en);
st25r3916ExecuteCommand(ST25R3916_CMD_STOP);
if((gRFAL.Lm.mdMask & RFAL_LM_MASK_NFCA) != 0U) {
/* Enable automatic responses for A */
st25r3916ClrRegisterBits(
ST25R3916_REG_PASSIVE_TARGET, ST25R3916_REG_PASSIVE_TARGET_d_106_ac_a);
/* Prepares the NFCIP-1 Passive target logic to wait in the Sense/Idle state */
st25r3916ExecuteCommand(ST25R3916_CMD_GOTO_SENSE);
}
if((gRFAL.Lm.mdMask & RFAL_LM_MASK_NFCF) != 0U) {
/* Enable automatic responses for F */
st25r3916ClrRegisterBits(
ST25R3916_REG_PASSIVE_TARGET, (ST25R3916_REG_PASSIVE_TARGET_d_212_424_1r));
}
if((gRFAL.Lm.mdMask & RFAL_LM_MASK_ACTIVE_P2P) != 0U) {
/* Ensure automatic response RF Collision Avoidance is back to only after Rx */
st25r3916ChangeRegisterBits(
ST25R3916_REG_MODE,
ST25R3916_REG_MODE_nfc_ar_mask,
ST25R3916_REG_MODE_nfc_ar_auto_rx);
/* Ensure that our field is Off, as automatic response RF Collision Avoidance may have been triggered */
st25r3916TxOff();
}
/*******************************************************************************/
/* Ensure that the NFCIP1 mode is disabled */
st25r3916ClrRegisterBits(
ST25R3916_REG_ISO14443A_NFC, ST25R3916_REG_ISO14443A_NFC_nfc_f0);
/*******************************************************************************/
/* Clear and enable required IRQs */
st25r3916DisableInterrupts(ST25R3916_IRQ_MASK_ALL);
st25r3916ClearAndEnableInterrupts(
(ST25R3916_IRQ_MASK_NFCT | ST25R3916_IRQ_MASK_RXS | ST25R3916_IRQ_MASK_CRC |
ST25R3916_IRQ_MASK_ERR1 | ST25R3916_IRQ_MASK_OSC | ST25R3916_IRQ_MASK_ERR2 |
ST25R3916_IRQ_MASK_PAR | ST25R3916_IRQ_MASK_EON | ST25R3916_IRQ_MASK_EOF |
gRFAL.Lm.mdIrqs));
/*******************************************************************************/
/* Clear the bitRate previously detected */
gRFAL.Lm.brDetected = RFAL_BR_KEEP;
/*******************************************************************************/
/* Apply the initial mode */
st25r3916ChangeRegisterBits(
ST25R3916_REG_MODE,
(ST25R3916_REG_MODE_targ | ST25R3916_REG_MODE_om_mask |
ST25R3916_REG_MODE_nfc_ar_mask),
(uint8_t)gRFAL.Lm.mdReg);
/*******************************************************************************/
/* Check if external Field is already On */
if(rfalIsExtFieldOn()) {
reSetState = true;
newState = RFAL_LM_STATE_IDLE; /* Set IDLE state */
}
#if 1 /* Perform bit rate detection in Low power mode */
else {
st25r3916ClrRegisterBits(
ST25R3916_REG_OP_CONTROL,
(ST25R3916_REG_OP_CONTROL_tx_en | ST25R3916_REG_OP_CONTROL_rx_en |
ST25R3916_REG_OP_CONTROL_en));
}
#endif
break;
/*******************************************************************************/
case RFAL_LM_STATE_IDLE:
/*******************************************************************************/
/* Check if device is coming from Low Power bit rate detection */
if(!st25r3916CheckReg(
ST25R3916_REG_OP_CONTROL,
ST25R3916_REG_OP_CONTROL_en,
ST25R3916_REG_OP_CONTROL_en)) {
/* Exit Low Power mode and confirm the temporarily enable */
st25r3916SetRegisterBits(
ST25R3916_REG_OP_CONTROL,
(ST25R3916_REG_OP_CONTROL_en | ST25R3916_REG_OP_CONTROL_rx_en));
if(!st25r3916CheckReg(
ST25R3916_REG_AUX_DISPLAY,
ST25R3916_REG_AUX_DISPLAY_osc_ok,
ST25R3916_REG_AUX_DISPLAY_osc_ok)) {
/* Wait for Oscilator ready */
if(st25r3916WaitForInterruptsTimed(
ST25R3916_IRQ_MASK_OSC, ST25R3916_TOUT_OSC_STABLE) == 0U) {
ret = ERR_IO;
break;
}
}
} else {
st25r3916GetInterrupt(ST25R3916_IRQ_MASK_OSC);
}
/*******************************************************************************/
/* In Active P2P the Initiator may: Turn its field On; LM goes into IDLE state;
* Initiator sends an unexpected frame raising a Protocol error; Initiator
* turns its field Off and ST25R3916 performs the automatic RF Collision
* Avoidance keeping our field On; upon a Protocol error upper layer sets
* again the state to IDLE to clear dataFlag and wait for next data.
*
* Ensure that when upper layer calls SetState(IDLE), it restores initial
* configuration and that check whether an external Field is still present */
if((gRFAL.Lm.mdMask & RFAL_LM_MASK_ACTIVE_P2P) != 0U) {
/* Ensure nfc_ar is reseted and back to only after Rx */
st25r3916ExecuteCommand(ST25R3916_CMD_STOP);
st25r3916ChangeRegisterBits(
ST25R3916_REG_MODE,
ST25R3916_REG_MODE_nfc_ar_mask,
ST25R3916_REG_MODE_nfc_ar_auto_rx);
/* Ensure that our field is Off, as automatic response RF Collision Avoidance may have been triggered */
st25r3916TxOff();
/* If external Field is no longer detected go back to POWER_OFF */
if(!st25r3916IsExtFieldOn()) {
reSetState = true;
newState = RFAL_LM_STATE_POWER_OFF; /* Set POWER_OFF state */
}
}
/*******************************************************************************/
/* If we are in ACTIVE_A, reEnable Listen for A before going to IDLE, otherwise do nothing */
if(gRFAL.Lm.state == RFAL_LM_STATE_ACTIVE_A) {
/* Enable automatic responses for A and Reset NFCA target state */
st25r3916ClrRegisterBits(
ST25R3916_REG_PASSIVE_TARGET, (ST25R3916_REG_PASSIVE_TARGET_d_106_ac_a));
st25r3916ExecuteCommand(ST25R3916_CMD_GOTO_SENSE);
}
/* ReEnable the receiver */
st25r3916ExecuteCommand(ST25R3916_CMD_CLEAR_FIFO);
st25r3916ExecuteCommand(ST25R3916_CMD_UNMASK_RECEIVE_DATA);
/*******************************************************************************/
/*Check if Observation Mode is enabled and set it on ST25R391x */
rfalCheckEnableObsModeRx();
break;
/*******************************************************************************/
case RFAL_LM_STATE_READY_F:
/*******************************************************************************/
/* If we're coming from BitRate detection mode, the Bit Rate Definition reg
* still has the last bit rate used.
* If a frame is received between setting the mode to Listen NFCA and
* setting Bit Rate Definition reg, it will raise a framing error.
* Set the bitrate immediately, and then the normal SetMode procedure */
st25r3916SetBitrate((uint8_t)gRFAL.Lm.brDetected, (uint8_t)gRFAL.Lm.brDetected);
/*******************************************************************************/
/* Disable automatic responses for NFC-A */
st25r3916SetRegisterBits(
ST25R3916_REG_PASSIVE_TARGET, (ST25R3916_REG_PASSIVE_TARGET_d_106_ac_a));
/* Set Mode NFC-F only */
ret = rfalSetMode(RFAL_MODE_LISTEN_NFCF, gRFAL.Lm.brDetected, gRFAL.Lm.brDetected);
gRFAL.state = RFAL_STATE_LM; /* Keep in Listen Mode */
/* ReEnable the receiver */
st25r3916ExecuteCommand(ST25R3916_CMD_CLEAR_FIFO);
st25r3916ExecuteCommand(ST25R3916_CMD_UNMASK_RECEIVE_DATA);
/* Clear any previous transmission errors (if Reader polled for other/unsupported technologies) */
st25r3916GetInterrupt(
(ST25R3916_IRQ_MASK_PAR | ST25R3916_IRQ_MASK_CRC | ST25R3916_IRQ_MASK_ERR2 |
ST25R3916_IRQ_MASK_ERR1));
st25r3916EnableInterrupts(
ST25R3916_IRQ_MASK_RXE); /* Start looking for any incoming data */
break;
/*******************************************************************************/
case RFAL_LM_STATE_CARDEMU_3:
/* Set Listen NFCF mode */
ret = rfalSetMode(RFAL_MODE_LISTEN_NFCF, gRFAL.Lm.brDetected, gRFAL.Lm.brDetected);
break;
/*******************************************************************************/
case RFAL_LM_STATE_READY_Ax:
case RFAL_LM_STATE_READY_A:
/*******************************************************************************/
/* If we're coming from BitRate detection mode, the Bit Rate Definition reg
* still has the last bit rate used.
* If a frame is received between setting the mode to Listen NFCA and
* setting Bit Rate Definition reg, it will raise a framing error.
* Set the bitrate immediately, and then the normal SetMode procedure */
st25r3916SetBitrate((uint8_t)gRFAL.Lm.brDetected, (uint8_t)gRFAL.Lm.brDetected);
/*******************************************************************************/
/* Disable automatic responses for NFC-F */
st25r3916SetRegisterBits(
ST25R3916_REG_PASSIVE_TARGET, (ST25R3916_REG_PASSIVE_TARGET_d_212_424_1r));
/* Set Mode NFC-A only */
ret = rfalSetMode(RFAL_MODE_LISTEN_NFCA, gRFAL.Lm.brDetected, gRFAL.Lm.brDetected);
gRFAL.state = RFAL_STATE_LM; /* Keep in Listen Mode */
break;
/*******************************************************************************/
case RFAL_LM_STATE_ACTIVE_Ax:
case RFAL_LM_STATE_ACTIVE_A:
/* Disable automatic responses for A */
st25r3916SetRegisterBits(
ST25R3916_REG_PASSIVE_TARGET, (ST25R3916_REG_PASSIVE_TARGET_d_106_ac_a));
/* Clear any previous transmission errors (if Reader polled for other/unsupported technologies) */
st25r3916GetInterrupt(
(ST25R3916_IRQ_MASK_PAR | ST25R3916_IRQ_MASK_CRC | ST25R3916_IRQ_MASK_ERR2 |
ST25R3916_IRQ_MASK_ERR1));
st25r3916EnableInterrupts(
ST25R3916_IRQ_MASK_RXE); /* Start looking for any incoming data */
break;
case RFAL_LM_STATE_TARGET_F:
/* Disable Automatic response SENSF_REQ */
st25r3916SetRegisterBits(
ST25R3916_REG_PASSIVE_TARGET, (ST25R3916_REG_PASSIVE_TARGET_d_212_424_1r));
break;
/*******************************************************************************/
case RFAL_LM_STATE_SLEEP_A:
case RFAL_LM_STATE_SLEEP_B:
case RFAL_LM_STATE_SLEEP_AF:
/* These sleep states have to be set by the rfalListenSleepStart() method */
return ERR_REQUEST;
/*******************************************************************************/
case RFAL_LM_STATE_CARDEMU_4A:
case RFAL_LM_STATE_CARDEMU_4B:
case RFAL_LM_STATE_TARGET_A:
/* States not handled by the LM, just keep state context */
break;
/*******************************************************************************/
default:
return ERR_WRONG_STATE;
}
} while(reSetState);
gRFAL.Lm.state = newState;
// Call callback on state change
if(gRFAL.callbacks.state_changed_cb) {
gRFAL.callbacks.state_changed_cb(gRFAL.callbacks.ctx);
}
return ret;
}
#endif /* RFAL_FEATURE_LISTEN_MODE */
/*******************************************************************************
* Wake-Up Mode *
*******************************************************************************/
#if RFAL_FEATURE_WAKEUP_MODE
/*******************************************************************************/
ReturnCode rfalWakeUpModeStart(const rfalWakeUpConfig* config) {
uint8_t aux;
uint8_t reg;
uint32_t irqs;
/* Check if RFAL is not initialized */
if(gRFAL.state < RFAL_STATE_INIT) {
return ERR_WRONG_STATE;
}
/* The Wake-Up procedure is explained in detail in Application Note: AN4985 */
if(config == NULL) {
gRFAL.wum.cfg.period = RFAL_WUM_PERIOD_200MS;
gRFAL.wum.cfg.irqTout = false;
gRFAL.wum.cfg.indAmp.enabled = true;
gRFAL.wum.cfg.indPha.enabled = false;
gRFAL.wum.cfg.cap.enabled = false;
gRFAL.wum.cfg.indAmp.delta = 2U;
gRFAL.wum.cfg.indAmp.reference = RFAL_WUM_REFERENCE_AUTO;
gRFAL.wum.cfg.indAmp.autoAvg = false;
/*******************************************************************************/
/* Check if AAT is enabled and if so make use of the SW Tag Detection */
if(st25r3916CheckReg(
ST25R3916_REG_IO_CONF2,
ST25R3916_REG_IO_CONF2_aat_en,
ST25R3916_REG_IO_CONF2_aat_en)) {
gRFAL.wum.cfg.swTagDetect = true;
gRFAL.wum.cfg.indAmp.autoAvg = true;
gRFAL.wum.cfg.indAmp.aaWeight = RFAL_WUM_AA_WEIGHT_16;
}
} else {
gRFAL.wum.cfg = *config;
}
/* Check for valid configuration */
if((!gRFAL.wum.cfg.cap.enabled && !gRFAL.wum.cfg.indAmp.enabled &&
!gRFAL.wum.cfg.indPha.enabled) ||
(gRFAL.wum.cfg.cap.enabled &&
(gRFAL.wum.cfg.indAmp.enabled || gRFAL.wum.cfg.indPha.enabled)) ||
(gRFAL.wum.cfg.cap.enabled && gRFAL.wum.cfg.swTagDetect) ||
((gRFAL.wum.cfg.indAmp.reference > RFAL_WUM_REFERENCE_AUTO) ||
(gRFAL.wum.cfg.indPha.reference > RFAL_WUM_REFERENCE_AUTO) ||
(gRFAL.wum.cfg.cap.reference > RFAL_WUM_REFERENCE_AUTO))) {
return ERR_PARAM;
}
irqs = ST25R3916_IRQ_MASK_NONE;
/* Disable Tx, Rx, External Field Detector and set default ISO14443A mode */
st25r3916TxRxOff();
st25r3916ClrRegisterBits(ST25R3916_REG_OP_CONTROL, ST25R3916_REG_OP_CONTROL_en_fd_mask);
st25r3916ChangeRegisterBits(
ST25R3916_REG_MODE,
(ST25R3916_REG_MODE_targ | ST25R3916_REG_MODE_om_mask),
(ST25R3916_REG_MODE_targ_init | ST25R3916_REG_MODE_om_iso14443a));
/* Set Analog configurations for Wake-up On event */
rfalSetAnalogConfig((RFAL_ANALOG_CONFIG_TECH_CHIP | RFAL_ANALOG_CONFIG_CHIP_WAKEUP_ON));
/*******************************************************************************/
/* Prepare Wake-Up Timer Control Register */
reg =
(uint8_t)(((uint8_t)gRFAL.wum.cfg.period & 0x0FU) << ST25R3916_REG_WUP_TIMER_CONTROL_wut_shift);
reg |=
(uint8_t)(((uint8_t)gRFAL.wum.cfg.period < (uint8_t)RFAL_WUM_PERIOD_100MS) ? ST25R3916_REG_WUP_TIMER_CONTROL_wur : 0x00U);
if(gRFAL.wum.cfg.irqTout || gRFAL.wum.cfg.swTagDetect) {
reg |= ST25R3916_REG_WUP_TIMER_CONTROL_wto;
irqs |= ST25R3916_IRQ_MASK_WT;
}
/* Check if HW Wake-up is to be used or SW Tag detection */
if(gRFAL.wum.cfg.swTagDetect) {
gRFAL.wum.cfg.indAmp.reference = 0U;
gRFAL.wum.cfg.indPha.reference = 0U;
gRFAL.wum.cfg.cap.reference = 0U;
} else {
/*******************************************************************************/
/* Check if Inductive Amplitude is to be performed */
if(gRFAL.wum.cfg.indAmp.enabled) {
aux =
(uint8_t)((gRFAL.wum.cfg.indAmp.delta) << ST25R3916_REG_AMPLITUDE_MEASURE_CONF_am_d_shift);
aux |=
(uint8_t)(gRFAL.wum.cfg.indAmp.aaInclMeas ? ST25R3916_REG_AMPLITUDE_MEASURE_CONF_am_aam : 0x00U);
aux |=
(uint8_t)(((uint8_t)gRFAL.wum.cfg.indAmp.aaWeight << ST25R3916_REG_AMPLITUDE_MEASURE_CONF_am_aew_shift) & ST25R3916_REG_AMPLITUDE_MEASURE_CONF_am_aew_mask);
aux |=
(uint8_t)(gRFAL.wum.cfg.indAmp.autoAvg ? ST25R3916_REG_AMPLITUDE_MEASURE_CONF_am_ae : 0x00U);
st25r3916WriteRegister(ST25R3916_REG_AMPLITUDE_MEASURE_CONF, aux);
/* Only need to set the reference if not using Auto Average */
if(!gRFAL.wum.cfg.indAmp.autoAvg) {
if(gRFAL.wum.cfg.indAmp.reference == RFAL_WUM_REFERENCE_AUTO) {
st25r3916MeasureAmplitude(&aux);
gRFAL.wum.cfg.indAmp.reference = aux;
}
st25r3916WriteRegister(
ST25R3916_REG_AMPLITUDE_MEASURE_REF, (uint8_t)gRFAL.wum.cfg.indAmp.reference);
}
reg |= ST25R3916_REG_WUP_TIMER_CONTROL_wam;
irqs |= ST25R3916_IRQ_MASK_WAM;
}
/*******************************************************************************/
/* Check if Inductive Phase is to be performed */
if(gRFAL.wum.cfg.indPha.enabled) {
aux =
(uint8_t)((gRFAL.wum.cfg.indPha.delta) << ST25R3916_REG_PHASE_MEASURE_CONF_pm_d_shift);
aux |=
(uint8_t)(gRFAL.wum.cfg.indPha.aaInclMeas ? ST25R3916_REG_PHASE_MEASURE_CONF_pm_aam : 0x00U);
aux |=
(uint8_t)(((uint8_t)gRFAL.wum.cfg.indPha.aaWeight << ST25R3916_REG_PHASE_MEASURE_CONF_pm_aew_shift) & ST25R3916_REG_PHASE_MEASURE_CONF_pm_aew_mask);
aux |=
(uint8_t)(gRFAL.wum.cfg.indPha.autoAvg ? ST25R3916_REG_PHASE_MEASURE_CONF_pm_ae : 0x00U);
st25r3916WriteRegister(ST25R3916_REG_PHASE_MEASURE_CONF, aux);
/* Only need to set the reference if not using Auto Average */
if(!gRFAL.wum.cfg.indPha.autoAvg) {
if(gRFAL.wum.cfg.indPha.reference == RFAL_WUM_REFERENCE_AUTO) {
st25r3916MeasurePhase(&aux);
gRFAL.wum.cfg.indPha.reference = aux;
}
st25r3916WriteRegister(
ST25R3916_REG_PHASE_MEASURE_REF, (uint8_t)gRFAL.wum.cfg.indPha.reference);
}
reg |= ST25R3916_REG_WUP_TIMER_CONTROL_wph;
irqs |= ST25R3916_IRQ_MASK_WPH;
}
/*******************************************************************************/
/* Check if Capacitive is to be performed */
if(gRFAL.wum.cfg.cap.enabled) {
/*******************************************************************************/
/* Perform Capacitive sensor calibration */
/* Disable Oscillator and Field */
st25r3916ClrRegisterBits(
ST25R3916_REG_OP_CONTROL,
(ST25R3916_REG_OP_CONTROL_en | ST25R3916_REG_OP_CONTROL_tx_en));
/* Sensor gain should be configured on Analog Config: RFAL_ANALOG_CONFIG_CHIP_WAKEUP_ON */
/* Perform calibration procedure */
st25r3916CalibrateCapacitiveSensor(NULL);
/*******************************************************************************/
aux =
(uint8_t)((gRFAL.wum.cfg.cap.delta) << ST25R3916_REG_CAPACITANCE_MEASURE_CONF_cm_d_shift);
aux |=
(uint8_t)(gRFAL.wum.cfg.cap.aaInclMeas ? ST25R3916_REG_CAPACITANCE_MEASURE_CONF_cm_aam : 0x00U);
aux |=
(uint8_t)(((uint8_t)gRFAL.wum.cfg.cap.aaWeight << ST25R3916_REG_CAPACITANCE_MEASURE_CONF_cm_aew_shift) & ST25R3916_REG_CAPACITANCE_MEASURE_CONF_cm_aew_mask);
aux |=
(uint8_t)(gRFAL.wum.cfg.cap.autoAvg ? ST25R3916_REG_CAPACITANCE_MEASURE_CONF_cm_ae : 0x00U);
st25r3916WriteRegister(ST25R3916_REG_CAPACITANCE_MEASURE_CONF, aux);
/* Only need to set the reference if not using Auto Average */
if(!gRFAL.wum.cfg.cap.autoAvg || gRFAL.wum.cfg.swTagDetect) {
if(gRFAL.wum.cfg.indPha.reference == RFAL_WUM_REFERENCE_AUTO) {
st25r3916MeasureCapacitance(&aux);
gRFAL.wum.cfg.cap.reference = aux;
}
st25r3916WriteRegister(
ST25R3916_REG_CAPACITANCE_MEASURE_REF, (uint8_t)gRFAL.wum.cfg.cap.reference);
}
reg |= ST25R3916_REG_WUP_TIMER_CONTROL_wcap;
irqs |= ST25R3916_IRQ_MASK_WCAP;
}
}
/* Disable and clear all interrupts except Wake-Up IRQs */
st25r3916DisableInterrupts(ST25R3916_IRQ_MASK_ALL);
st25r3916GetInterrupt(irqs);
st25r3916EnableInterrupts(irqs);
/* Enable Low Power Wake-Up Mode (Disable: Oscilattor, Tx, Rx and External Field Detector) */
st25r3916WriteRegister(ST25R3916_REG_WUP_TIMER_CONTROL, reg);
st25r3916ChangeRegisterBits(
ST25R3916_REG_OP_CONTROL,
(ST25R3916_REG_OP_CONTROL_en | ST25R3916_REG_OP_CONTROL_rx_en |
ST25R3916_REG_OP_CONTROL_tx_en | ST25R3916_REG_OP_CONTROL_en_fd_mask |
ST25R3916_REG_OP_CONTROL_wu),
ST25R3916_REG_OP_CONTROL_wu);
gRFAL.wum.state = RFAL_WUM_STATE_ENABLED;
gRFAL.state = RFAL_STATE_WUM;
return ERR_NONE;
}
/*******************************************************************************/
bool rfalWakeUpModeHasWoke(void) {
return (gRFAL.wum.state >= RFAL_WUM_STATE_ENABLED_WOKE);
}
/*******************************************************************************/
static uint16_t rfalWakeUpModeFilter(uint16_t curRef, uint16_t curVal, uint8_t weight) {
uint16_t newRef;
/* Perform the averaging|filter as describded in ST25R3916 DS */
/* Avoid signed arithmetics by spliting in two cases */
if(curVal > curRef) {
newRef = curRef + ((curVal - curRef) / weight);
/* In order for the reference to converge to final value *
* increment once the diff is smaller that the weight */
if((curVal != curRef) && (curRef == newRef)) {
newRef &= 0xFF00U;
newRef += 0x0100U;
}
} else {
newRef = curRef - ((curRef - curVal) / weight);
/* In order for the reference to converge to final value *
* decrement once the diff is smaller that the weight */
if((curVal != curRef) && (curRef == newRef)) {
newRef &= 0xFF00U;
}
}
return newRef;
}
/*******************************************************************************/
static void rfalRunWakeUpModeWorker(void) {
uint32_t irqs;
uint8_t reg;
uint16_t value;
uint16_t delta;
if(gRFAL.state != RFAL_STATE_WUM) {
return;
}
switch(gRFAL.wum.state) {
case RFAL_WUM_STATE_ENABLED:
case RFAL_WUM_STATE_ENABLED_WOKE:
irqs = st25r3916GetInterrupt(
(ST25R3916_IRQ_MASK_WT | ST25R3916_IRQ_MASK_WAM | ST25R3916_IRQ_MASK_WPH |
ST25R3916_IRQ_MASK_WCAP));
if(irqs == ST25R3916_IRQ_MASK_NONE) {
break; /* No interrupt to process */
}
/*******************************************************************************/
/* Check and mark which measurement(s) cause interrupt */
if((irqs & ST25R3916_IRQ_MASK_WAM) != 0U) {
st25r3916ReadRegister(ST25R3916_REG_AMPLITUDE_MEASURE_RESULT, ®);
gRFAL.wum.state = RFAL_WUM_STATE_ENABLED_WOKE;
}
if((irqs & ST25R3916_IRQ_MASK_WPH) != 0U) {
st25r3916ReadRegister(ST25R3916_REG_PHASE_MEASURE_RESULT, ®);
gRFAL.wum.state = RFAL_WUM_STATE_ENABLED_WOKE;
}
if((irqs & ST25R3916_IRQ_MASK_WCAP) != 0U) {
st25r3916ReadRegister(ST25R3916_REG_CAPACITANCE_MEASURE_RESULT, ®);
gRFAL.wum.state = RFAL_WUM_STATE_ENABLED_WOKE;
}
if((irqs & ST25R3916_IRQ_MASK_WT) != 0U) {
/*******************************************************************************/
if(gRFAL.wum.cfg.swTagDetect) {
/* Enable Ready mode and wait the settle time */
st25r3916ChangeRegisterBits(
ST25R3916_REG_OP_CONTROL,
(ST25R3916_REG_OP_CONTROL_en | ST25R3916_REG_OP_CONTROL_wu),
ST25R3916_REG_OP_CONTROL_en);
platformDelay(RFAL_ST25R3916_AAT_SETTLE);
/*******************************************************************************/
if(gRFAL.wum.cfg.indAmp.enabled) {
/* Perform amplitude measurement */
st25r3916MeasureAmplitude(®);
/* Convert inputs to TD format */
value = rfalConvTDFormat(reg);
delta = rfalConvTDFormat(gRFAL.wum.cfg.indAmp.delta);
/* Set first measurement as reference */
if(gRFAL.wum.cfg.indAmp.reference == 0U) {
gRFAL.wum.cfg.indAmp.reference = value;
}
/* Check if device should be woken */
if((value >= (gRFAL.wum.cfg.indAmp.reference + delta)) ||
(value <= (gRFAL.wum.cfg.indAmp.reference - delta))) {
gRFAL.wum.state = RFAL_WUM_STATE_ENABLED_WOKE;
break;
}
/* Update moving reference if enabled */
if(gRFAL.wum.cfg.indAmp.autoAvg) {
gRFAL.wum.cfg.indAmp.reference = rfalWakeUpModeFilter(
gRFAL.wum.cfg.indAmp.reference,
value,
(RFAL_WU_MIN_WEIGHT_VAL << (uint8_t)gRFAL.wum.cfg.indAmp.aaWeight));
}
}
/*******************************************************************************/
if(gRFAL.wum.cfg.indPha.enabled) {
/* Perform Phase measurement */
st25r3916MeasurePhase(®);
/* Convert inputs to TD format */
value = rfalConvTDFormat(reg);
delta = rfalConvTDFormat(gRFAL.wum.cfg.indPha.delta);
/* Set first measurement as reference */
if(gRFAL.wum.cfg.indPha.reference == 0U) {
gRFAL.wum.cfg.indPha.reference = value;
}
/* Check if device should be woken */
if((value >= (gRFAL.wum.cfg.indPha.reference + delta)) ||
(value <= (gRFAL.wum.cfg.indPha.reference - delta))) {
gRFAL.wum.state = RFAL_WUM_STATE_ENABLED_WOKE;
break;
}
/* Update moving reference if enabled */
if(gRFAL.wum.cfg.indPha.autoAvg) {
gRFAL.wum.cfg.indPha.reference = rfalWakeUpModeFilter(
gRFAL.wum.cfg.indPha.reference,
value,
(RFAL_WU_MIN_WEIGHT_VAL << (uint8_t)gRFAL.wum.cfg.indPha.aaWeight));
}
}
/* Re-Enable low power Wake-Up mode for wto to trigger another measurement(s) */
st25r3916ChangeRegisterBits(
ST25R3916_REG_OP_CONTROL,
(ST25R3916_REG_OP_CONTROL_en | ST25R3916_REG_OP_CONTROL_wu),
(ST25R3916_REG_OP_CONTROL_wu));
}
}
break;
default:
/* MISRA 16.4: no empty default statement (a comment being enough) */
break;
}
}
/*******************************************************************************/
ReturnCode rfalWakeUpModeStop(void) {
/* Check if RFAL is in Wake-up mode */
if(gRFAL.state != RFAL_STATE_WUM) {
return ERR_WRONG_STATE;
}
gRFAL.wum.state = RFAL_WUM_STATE_NOT_INIT;
/* Disable Wake-Up Mode */
st25r3916ClrRegisterBits(ST25R3916_REG_OP_CONTROL, ST25R3916_REG_OP_CONTROL_wu);
st25r3916DisableInterrupts(
(ST25R3916_IRQ_MASK_WT | ST25R3916_IRQ_MASK_WAM | ST25R3916_IRQ_MASK_WPH |
ST25R3916_IRQ_MASK_WCAP));
/* Re-Enable External Field Detector as: Automatics */
st25r3916ChangeRegisterBits(
ST25R3916_REG_OP_CONTROL,
ST25R3916_REG_OP_CONTROL_en_fd_mask,
ST25R3916_REG_OP_CONTROL_en_fd_auto_efd);
/* Re-Enable the Oscillator */
st25r3916OscOn();
/* Set Analog configurations for Wake-up Off event */
rfalSetAnalogConfig((RFAL_ANALOG_CONFIG_TECH_CHIP | RFAL_ANALOG_CONFIG_CHIP_WAKEUP_OFF));
return ERR_NONE;
}
#endif /* RFAL_FEATURE_WAKEUP_MODE */
/*******************************************************************************
* Low-Power Mode *
*******************************************************************************/
#if RFAL_FEATURE_LOWPOWER_MODE
/*******************************************************************************/
ReturnCode rfalLowPowerModeStart(void) {
/* Check if RFAL is not initialized */
if(gRFAL.state < RFAL_STATE_INIT) {
return ERR_WRONG_STATE;
}
/* Stop any ongoing activity and set the device in low power by disabling oscillator, transmitter, receiver and external field detector */
st25r3916ExecuteCommand(ST25R3916_CMD_STOP);
st25r3916ClrRegisterBits(
ST25R3916_REG_OP_CONTROL,
(ST25R3916_REG_OP_CONTROL_en | ST25R3916_REG_OP_CONTROL_rx_en |
ST25R3916_REG_OP_CONTROL_wu | ST25R3916_REG_OP_CONTROL_tx_en |
ST25R3916_REG_OP_CONTROL_en_fd_mask));
rfalSetAnalogConfig((RFAL_ANALOG_CONFIG_TECH_CHIP | RFAL_ANALOG_CONFIG_CHIP_LOWPOWER_ON));
gRFAL.state = RFAL_STATE_IDLE;
gRFAL.lpm.isRunning = true;
platformDisableIrqCallback();
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode rfalLowPowerModeStop(void) {
ReturnCode ret;
platformEnableIrqCallback();
/* Check if RFAL is on right state */
if(!gRFAL.lpm.isRunning) {
return ERR_WRONG_STATE;
}
/* Re-enable device */
EXIT_ON_ERR(ret, st25r3916OscOn());
st25r3916ChangeRegisterBits(
ST25R3916_REG_OP_CONTROL,
ST25R3916_REG_OP_CONTROL_en_fd_mask,
ST25R3916_REG_OP_CONTROL_en_fd_auto_efd);
rfalSetAnalogConfig((RFAL_ANALOG_CONFIG_TECH_CHIP | RFAL_ANALOG_CONFIG_CHIP_LOWPOWER_OFF));
gRFAL.state = RFAL_STATE_INIT;
return ERR_NONE;
}
#endif /* RFAL_FEATURE_LOWPOWER_MODE */
/*******************************************************************************
* RF Chip *
*******************************************************************************/
/*******************************************************************************/
ReturnCode rfalChipWriteReg(uint16_t reg, const uint8_t* values, uint8_t len) {
if(!st25r3916IsRegValid((uint8_t)reg)) {
return ERR_PARAM;
}
return st25r3916WriteMultipleRegisters((uint8_t)reg, values, len);
}
/*******************************************************************************/
ReturnCode rfalChipReadReg(uint16_t reg, uint8_t* values, uint8_t len) {
if(!st25r3916IsRegValid((uint8_t)reg)) {
return ERR_PARAM;
}
return st25r3916ReadMultipleRegisters((uint8_t)reg, values, len);
}
/*******************************************************************************/
ReturnCode rfalChipExecCmd(uint16_t cmd) {
if(!st25r3916IsCmdValid((uint8_t)cmd)) {
return ERR_PARAM;
}
return st25r3916ExecuteCommand((uint8_t)cmd);
}
/*******************************************************************************/
ReturnCode rfalChipWriteTestReg(uint16_t reg, uint8_t value) {
return st25r3916WriteTestRegister((uint8_t)reg, value);
}
/*******************************************************************************/
ReturnCode rfalChipReadTestReg(uint16_t reg, uint8_t* value) {
return st25r3916ReadTestRegister((uint8_t)reg, value);
}
/*******************************************************************************/
ReturnCode rfalChipChangeRegBits(uint16_t reg, uint8_t valueMask, uint8_t value) {
if(!st25r3916IsRegValid((uint8_t)reg)) {
return ERR_PARAM;
}
return st25r3916ChangeRegisterBits((uint8_t)reg, valueMask, value);
}
/*******************************************************************************/
ReturnCode rfalChipChangeTestRegBits(uint16_t reg, uint8_t valueMask, uint8_t value) {
st25r3916ChangeTestRegisterBits((uint8_t)reg, valueMask, value);
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode rfalChipSetRFO(uint8_t rfo) {
return st25r3916ChangeRegisterBits(
ST25R3916_REG_TX_DRIVER, ST25R3916_REG_TX_DRIVER_d_res_mask, rfo);
}
/*******************************************************************************/
ReturnCode rfalChipGetRFO(uint8_t* result) {
ReturnCode ret;
ret = st25r3916ReadRegister(ST25R3916_REG_TX_DRIVER, result);
(*result) = ((*result) & ST25R3916_REG_TX_DRIVER_d_res_mask);
return ret;
}
/*******************************************************************************/
ReturnCode rfalChipMeasureAmplitude(uint8_t* result) {
ReturnCode err;
uint8_t reg_opc, reg_mode, reg_conf1, reg_conf2;
/* Save registers which will be adjusted below */
st25r3916ReadRegister(ST25R3916_REG_OP_CONTROL, ®_opc);
st25r3916ReadRegister(ST25R3916_REG_MODE, ®_mode);
st25r3916ReadRegister(ST25R3916_REG_RX_CONF1, ®_conf1);
st25r3916ReadRegister(ST25R3916_REG_RX_CONF2, ®_conf2);
/* Set values as per defaults of DS. These regs/bits influence receiver chain and change amplitude */
/* Doing so achieves an amplitude comparable over a complete polling cylce */
st25r3916WriteRegister(ST25R3916_REG_OP_CONTROL, (reg_opc & ~ST25R3916_REG_OP_CONTROL_rx_chn));
st25r3916WriteRegister(
ST25R3916_REG_MODE,
ST25R3916_REG_MODE_om_iso14443a | ST25R3916_REG_MODE_targ_init |
ST25R3916_REG_MODE_tr_am_ook | ST25R3916_REG_MODE_nfc_ar_off);
st25r3916WriteRegister(
ST25R3916_REG_RX_CONF1, (reg_conf1 & ~ST25R3916_REG_RX_CONF1_ch_sel_AM));
st25r3916WriteRegister(
ST25R3916_REG_RX_CONF2,
((reg_conf2 & ~(ST25R3916_REG_RX_CONF2_demod_mode | ST25R3916_REG_RX_CONF2_amd_sel)) |
ST25R3916_REG_RX_CONF2_amd_sel_peak));
/* Perform the actual measurement */
err = st25r3916MeasureAmplitude(result);
/* Restore values */
st25r3916WriteRegister(ST25R3916_REG_OP_CONTROL, reg_opc);
st25r3916WriteRegister(ST25R3916_REG_MODE, reg_mode);
st25r3916WriteRegister(ST25R3916_REG_RX_CONF1, reg_conf1);
st25r3916WriteRegister(ST25R3916_REG_RX_CONF2, reg_conf2);
return err;
}
/*******************************************************************************/
ReturnCode rfalChipMeasurePhase(uint8_t* result) {
st25r3916MeasurePhase(result);
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode rfalChipMeasureCapacitance(uint8_t* result) {
st25r3916MeasureCapacitance(result);
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode rfalChipMeasurePowerSupply(uint8_t param, uint8_t* result) {
*result = st25r3916MeasurePowerSupply(param);
return ERR_NONE;
}
/*******************************************************************************/
extern uint8_t invalid_size_of_stream_configs
[(sizeof(struct st25r3916StreamConfig) == sizeof(struct iso15693StreamConfig)) ? 1 : (-1)];