/******************************************************************************
* \attention
*
* © COPYRIGHT 2020 STMicroelectronics
*
* 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 */
} 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)))<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();
}
/*******************************************************************************/
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;
}
/*******************************************************************************/
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();
}
/*******************************************************************************/
}
/*******************************************************************************/
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();
}
/*******************************************************************************/
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;
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)];