ST Expansion SW Team
RFAL library for the STMicroelectronics X-NUCLEO-NFC05A1
Diff: rfal_nfca.cpp
- Revision:
- 0:75fc82583a41
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/rfal_nfca.cpp Thu Nov 14 14:34:50 2019 +0000
@@ -0,0 +1,555 @@
+
+/******************************************************************************
+ * @attention
+ *
+ * <h2><center>© COPYRIGHT 2016 STMicroelectronics</center></h2>
+ *
+ * Licensed under ST MYLIBERTY SOFTWARE LICENSE AGREEMENT (the "License");
+ * You may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://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: ST25R391x firmware
+ * $Revision: $
+ * LANGUAGE: ISO C99
+ */
+
+/*! \file rfal_nfca.c
+ *
+ * \author Gustavo Patricio
+ *
+ * \brief Provides several NFC-A convenience methods and definitions
+ *
+ * It provides a Poller (ISO14443A PCD) interface and as well as
+ * some NFC-A Listener (ISO14443A PICC) helpers.
+ *
+ * The definitions and helpers methods provided by this module are only
+ * up to ISO14443-3 layer
+ *
+ */
+
+/*
+ ******************************************************************************
+ * INCLUDES
+ ******************************************************************************
+ */
+#include <platform1.h>
+#include "rfal_nfca.h"
+#include "utils.h"
+
+/*
+ ******************************************************************************
+ * ENABLE SWITCH
+ ******************************************************************************
+ */
+
+#ifndef RFAL_FEATURE_NFCA
+ #error " RFAL: Module configuration missing. Please enable/disable NFC-A module by setting: RFAL_FEATURE_NFCA "
+#endif
+
+#if RFAL_FEATURE_NFCA
+
+/*
+ ******************************************************************************
+ * GLOBAL DEFINES
+ ******************************************************************************
+ */
+
+#define RFAL_NFCA_SLP_FWT rfalConvMsTo1fc(1) /*!< Check 1ms for any modulation ISO14443-3 6.4.3 */
+#define RFAL_NFCA_SLP_CMD 0x50 /*!< SLP cmd (byte1) Digital 1.1 6.9.1 & Table 20 */
+#define RFAL_NFCA_SLP_BYTE2 0x00 /*!< SLP byte2 Digital 1.1 6.9.1 & Table 20 */
+#define RFAL_NFCA_SLP_CMD_POS 0 /*!< SLP cmd position Digital 1.1 6.9.1 & Table 20 */
+#define RFAL_NFCA_SLP_BYTE2_POS 1 /*!< SLP byte2 position Digital 1.1 6.9.1 & Table 20 */
+
+#define RFAL_NFCA_SDD_CT 0x88 /*!< Cascade Tag value Digital 1.1 6.7.2 */
+#define RFAL_NFCA_SDD_CT_LEN 1 /*!< Cascade Tag length */
+
+#define RFAL_NFCA_SLP_REQ_LEN 2 /*!< SLP_REQ length */
+
+#define RFAL_NFCA_SEL_CMD_LEN 1 /*!< SEL_CMD length */
+#define RFAL_NFCA_SEL_PAR_LEN 1 /*!< SEL_PAR length */
+#define RFAL_NFCA_SEL_SELPAR rfalNfcaSelPar(7, 0)/*!< SEL_PAR on Select is always with 4 data/nfcid */
+#define RFAL_NFCA_BCC_LEN 1 /*!< BCC length */
+
+#define RFAL_NFCA_SDD_REQ_LEN (RFAL_NFCA_SEL_CMD_LEN + RFAL_NFCA_SEL_PAR_LEN) /*!< SDD_REQ length */
+#define RFAL_NFCA_SDD_RES_LEN (RFAL_NFCA_CASCADE_1_UID_LEN + RFAL_NFCA_BCC_LEN) /*!< SDD_RES length */
+
+#define RFAL_NFCA_T_RETRANS 5 /*!< t RETRANSMISSION [3, 33]ms EMVCo 2.6 A.5 */
+#define RFAL_NFCA_N_RETRANS 2 /*!< Number of retries EMVCo 2.6 9.6.1.3 */
+
+
+/*! SDD_REQ (Select) Cascade Levels */
+enum
+{
+ RFAL_NFCA_SEL_CASCADE_L1 = 0, /*!< SDD_REQ Cascade Level 1 */
+ RFAL_NFCA_SEL_CASCADE_L2 = 1, /*!< SDD_REQ Cascade Level 2 */
+ RFAL_NFCA_SEL_CASCADE_L3 = 2 /*!< SDD_REQ Cascade Level 3 */
+};
+
+/*! SDD_REQ (Select) request Cascade Level command Digital 1.1 Table 15 */
+enum
+{
+ RFAL_NFCA_CMD_SEL_CL1 = 0x93, /*!< SDD_REQ command Cascade Level 1 */
+ RFAL_NFCA_CMD_SEL_CL2 = 0x95, /*!< SDD_REQ command Cascade Level 2 */
+ RFAL_NFCA_CMD_SEL_CL3 = 0x97, /*!< SDD_REQ command Cascade Level 3 */
+};
+
+/*
+******************************************************************************
+* GLOBAL MACROS
+******************************************************************************
+*/
+#define rfalNfcaSelPar( nBy, nbi ) (((nBy<<4) & 0xF0) | (nbi&0x0F) ) /*!< Calculates SEL_PAR with the bytes/bits to be sent */
+#define rfalNfcaCLn2SELCMD( cl ) (RFAL_NFCA_CMD_SEL_CL1 + (2*cl)) /*!< Calculates SEL_CMD with the given cascade level */
+#define rfalNfcaNfcidLen2CL( l ) (l / 5) /*!< Calculates cascade level by the NFCID length */
+
+/*! Executes the given Tx method (f) and if a Timeout error is detected it retries (rt) times performing a delay of (dl) in between */
+#define rfalNfcaTxRetry( r, f, rt, dl ) {uint8_t rts=rt; do{ r=f; if((rt!=0)&&(dl!=0)) platformDelay(dl); }while((r==ERR_TIMEOUT) && (rts--)); }
+
+/*
+******************************************************************************
+* GLOBAL TYPES
+******************************************************************************
+*/
+
+/*! SLP_REQ (HLTA) format Digital 1.1 6.9.1 & Table 20 */
+typedef struct
+{
+ uint8_t frame[RFAL_NFCA_SLP_REQ_LEN]; /*!< SLP: 0x50 0x00 */
+} rfalNfcaSlpReq;
+
+/*
+******************************************************************************
+* LOCAL FUNCTION PROTOTYPES
+******************************************************************************
+*/
+static uint8_t rfalNfcaCalculateBcc( uint8_t* buf, uint8_t bufLen );
+
+
+/*
+ ******************************************************************************
+ * LOCAL FUNCTIONS
+ ******************************************************************************
+ */
+
+static uint8_t rfalNfcaCalculateBcc( uint8_t* buf, uint8_t bufLen )
+{
+ uint8_t i;
+ uint8_t BCC;
+
+ BCC = 0;
+
+ /* BCC is XOR over first 4 bytes of the SDD_RES Digital 1.1 6.7.2 */
+ for(i = 0; i < bufLen; i++)
+ {
+ BCC ^= *(buf + i);
+ }
+
+ return BCC;
+}
+
+/*
+******************************************************************************
+* GLOBAL FUNCTIONS
+******************************************************************************
+*/
+
+/*******************************************************************************/
+ReturnCode rfalNfcaPollerInitialize( SPI* mspiChannel, ST25R3911* mST25, DigitalOut* gpio_cs, InterruptIn* IRQ, DigitalOut* fieldLED_01, DigitalOut* fieldLED_02, DigitalOut* fieldLED_03, DigitalOut* fieldLED_04, DigitalOut* fieldLED_05, DigitalOut* fieldLED_06 )
+{
+ ReturnCode ret;
+
+ EXIT_ON_ERR( ret, rfalSetMode( RFAL_MODE_POLL_NFCA, RFAL_BR_106, RFAL_BR_106, mspiChannel, mST25, gpio_cs, IRQ, fieldLED_01, fieldLED_02, fieldLED_03, fieldLED_04, fieldLED_05, fieldLED_06 ) );
+ rfalSetErrorHandling( RFAL_ERRORHANDLING_NFC );
+
+ rfalSetGT( RFAL_GT_NFCA );
+ rfalSetFDTListen( RFAL_FDT_LISTEN_NFCA_POLLER );
+ rfalSetFDTPoll( RFAL_FDT_POLL_NFCA_POLLER );
+
+ return ERR_NONE;
+}
+
+
+/*******************************************************************************/
+ReturnCode rfalNfcaPollerCheckPresence( rfal14443AShortFrameCmd cmd, rfalNfcaSensRes *sensRes, SPI* mspiChannel, ST25R3911* mST25, DigitalOut* gpio_cs, InterruptIn* IRQ, DigitalOut* fieldLED_01, DigitalOut* fieldLED_02, DigitalOut* fieldLED_03, DigitalOut* fieldLED_04, DigitalOut* fieldLED_05, DigitalOut* fieldLED_06 )
+{
+ ReturnCode ret;
+ uint16_t rcvLen;
+
+ /* Digital 1.1 6.10.1.3 For Commands ALL_REQ, SENS_REQ, SDD_REQ, and SEL_REQ, the NFC Forum Device *
+ * MUST treat receipt of a Listen Frame at a time after FDT(Listen, min) as a Timeour Error */
+
+ ret = rfalISO14443ATransceiveShortFrame( cmd, (uint8_t*)sensRes, rfalConvBytesToBits(sizeof(rfalNfcaSensRes)), &rcvLen, RFAL_NFCA_FDTMIN, mspiChannel, mST25, gpio_cs, IRQ, fieldLED_01, fieldLED_02, fieldLED_03, fieldLED_04, fieldLED_05, fieldLED_06 ) ;
+ if( (ERR_NO_MASK(ret) == ERR_RF_COLLISION) || (ERR_NO_MASK(ret) == ERR_CRC) || (ERR_NO_MASK(ret) == ERR_NOMEM) ||
+ (ERR_NO_MASK(ret) == ERR_FRAMING) || (ERR_NO_MASK(ret) == ERR_PAR) )
+ {
+ ret = ERR_NONE;
+ }
+
+ return ret;
+}
+
+
+/*******************************************************************************/
+ReturnCode rfalNfcaPollerTechnologyDetection( rfalComplianceMode compMode, rfalNfcaSensRes *sensRes, SPI* mspiChannel, ST25R3911* mST25, DigitalOut* gpio_cs, InterruptIn* IRQ, DigitalOut* fieldLED_01, DigitalOut* fieldLED_02, DigitalOut* fieldLED_03, DigitalOut* fieldLED_04, DigitalOut* fieldLED_05, DigitalOut* fieldLED_06 )
+{
+ ReturnCode ret;
+
+ EXIT_ON_ERR( ret, rfalNfcaPollerCheckPresence( ((compMode == RFAL_COMPLIANCE_MODE_EMV) ? RFAL_14443A_SHORTFRAME_CMD_WUPA : RFAL_14443A_SHORTFRAME_CMD_REQA), sensRes , mspiChannel, mST25, gpio_cs, IRQ, fieldLED_01, fieldLED_02, fieldLED_03, fieldLED_04, fieldLED_05, fieldLED_06 ) );
+
+ /* Send SLP_REQ as Activity 1.1 9.2.3.6 and EMVCo 2.6 9.2.1.3 */
+ if( compMode != RFAL_COMPLIANCE_MODE_ISO)
+ {
+ EXIT_ON_ERR( ret, rfalNfcaPollerSleep( mspiChannel, mST25, gpio_cs, IRQ, fieldLED_01, fieldLED_02, fieldLED_03, fieldLED_04, fieldLED_05, fieldLED_06 ) );
+ }
+ return ERR_NONE;
+}
+
+/*******************************************************************************/
+ReturnCode rfalNfcaPollerSingleCollisionResolution( uint8_t devLimit, bool *collPending, rfalNfcaSelRes *selRes, uint8_t *nfcId1, uint8_t *nfcId1Len, SPI* mspiChannel, ST25R3911* mST25, DigitalOut* gpio_cs, InterruptIn* IRQ, DigitalOut* fieldLED_01, DigitalOut* fieldLED_02, DigitalOut* fieldLED_03, DigitalOut* fieldLED_04, DigitalOut* fieldLED_05, DigitalOut* fieldLED_06 )
+{
+ uint8_t i;
+ ReturnCode ret;
+ rfalNfcaSelReq selReq;
+ uint16_t bytesRx;
+ uint8_t bytesTxRx;
+ uint8_t bitsTxRx;
+
+ /* Check parameters */
+ if( (collPending == NULL) || (selRes == NULL) || (nfcId1 == NULL) || (nfcId1Len == NULL) )
+ {
+ return ERR_PARAM;
+ }
+
+ /* Initialize output parameters */
+ *collPending = false; /* Activity 1.1 9.3.4.6 */
+ *nfcId1Len = 0;
+ ST_MEMSET( nfcId1, 0x00, RFAL_NFCA_CASCADE_3_UID_LEN );
+
+ /*******************************************************************************/
+ /* Go through all Cascade Levels Activity 1.1 9.3.4 */
+ for( i = RFAL_NFCA_SEL_CASCADE_L1; i <= RFAL_NFCA_SEL_CASCADE_L3; i++)
+ {
+ /* Initialize the SDD_REQ to send for the new cascade level */
+ ST_MEMSET( (uint8_t*)&selReq, 0x00, sizeof(rfalNfcaSelReq) );
+ selReq.selCmd = rfalNfcaCLn2SELCMD(i);
+
+ bytesTxRx = RFAL_NFCA_SDD_REQ_LEN;
+ bitsTxRx = 0;
+
+ /*******************************************************************************/
+ /* Go through Collision loop */
+ do
+ {
+ /* Calculate SEL_PAR with the bytes/bits to be sent */
+ selReq.selPar = rfalNfcaSelPar(bytesTxRx, bitsTxRx);
+
+ /* Send SDD_REQ (Anticollision frame) - Retry upon timeout EMVCo 2.6 9.6.1.3 */
+ rfalNfcaTxRetry( ret, rfalISO14443ATransceiveAnticollisionFrame( (uint8_t*)&selReq, &bytesTxRx, &bitsTxRx, &bytesRx, RFAL_NFCA_FDTMIN, mspiChannel, mST25, gpio_cs, IRQ, fieldLED_01, fieldLED_02, fieldLED_03, fieldLED_04, fieldLED_05, fieldLED_06 ) , ((devLimit==0)?RFAL_NFCA_N_RETRANS:0), RFAL_NFCA_T_RETRANS);
+
+ bytesRx = rfalConvBitsToBytes(bytesRx);
+
+ if( ret == ERR_RF_COLLISION )
+ {
+ /* Check received length */
+ if( (bytesTxRx + (bitsTxRx ? 1 : 0)) > (RFAL_NFCA_CASCADE_1_UID_LEN + RFAL_NFCA_SDD_REQ_LEN) )
+ {
+ return ERR_PROTO;
+ }
+
+ if( (devLimit == 0) && !(*collPending) )
+ {
+ /* Activity 1.0 & 1.1 9.3.4.12: If CON_DEVICES_LIMIT has a value of 0, then
+ * NFC Forum Device is configured to perform collision detection only */
+ *collPending = true;
+ return ERR_IGNORE;
+ }
+
+ *collPending = true;
+
+ /* Set and select the collision bit, with the number of bytes/bits successfully TxRx */
+ *((uint8_t*)&selReq + bytesTxRx) |= (1 << bitsTxRx);
+ bitsTxRx++;
+
+ /* Check if number of bits form a byte */
+ if( bitsTxRx == RFAL_BITS_IN_BYTE )
+ {
+ bitsTxRx = 0;
+ bytesTxRx++;
+ }
+ }
+ }while ((ret == ERR_RF_COLLISION) && (RFAL_NFCA_SDD_RES_LEN != bytesRx) ); /* BCC byte should not have collision if NFCID1 data are same */
+
+
+ /*******************************************************************************/
+ /* Check if Collision loop has failed */
+ if( ret != ERR_NONE )
+ {
+ return ret;
+ }
+
+
+ /* If collisions are to be reported check whether the response is complete */
+ if( (devLimit == 0) && (bytesRx != sizeof(rfalNfcaSddRes)) )
+ {
+ return ERR_PROTO;
+ }
+
+ /* Check if the received BCC match */
+ if( selReq.bcc != rfalNfcaCalculateBcc( selReq.nfcid1, RFAL_NFCA_CASCADE_1_UID_LEN ) )
+ {
+ return ERR_PROTO;
+ }
+
+ /*******************************************************************************/
+ /* Anticollision OK, Select this Cascade Level */
+ selReq.selPar = RFAL_NFCA_SEL_SELPAR;
+
+ /* Send SEL_REQ (Select command) - Retry upon timeout EMVCo 2.6 9.6.1.3 */
+ rfalNfcaTxRetry( ret, rfalTransceiveBlockingTxRx( (uint8_t*)&selReq, sizeof(rfalNfcaSelReq), (uint8_t*)selRes, sizeof(rfalNfcaSelRes), &bytesRx, RFAL_TXRX_FLAGS_DEFAULT, RFAL_NFCA_FDTMIN, mspiChannel, mST25, gpio_cs, IRQ, fieldLED_01, fieldLED_02, fieldLED_03, fieldLED_04, fieldLED_05, fieldLED_06 ) , ((devLimit==0)?RFAL_NFCA_N_RETRANS:0), RFAL_NFCA_T_RETRANS);
+
+ if( ret != ERR_NONE )
+ return ret;
+
+
+ /* Ensure proper response length */
+ if( bytesRx != sizeof(rfalNfcaSelRes) )
+ {
+ return ERR_PROTO;
+ }
+
+ /*******************************************************************************/
+ /* Check cascade byte, if cascade tag then go next cascade level */
+ if( (ret == ERR_NONE) && (*selReq.nfcid1 == RFAL_NFCA_SDD_CT) )
+ {
+ /* Cascade Tag present, store nfcid1 bytes (excluding cascade tag) and continue for next CL */
+ ST_MEMCPY( (nfcId1 + *nfcId1Len), ((uint8_t*)&selReq.nfcid1 + RFAL_NFCA_SDD_CT_LEN), (RFAL_NFCA_CASCADE_1_UID_LEN - RFAL_NFCA_SDD_CT_LEN) );
+ *nfcId1Len += (RFAL_NFCA_CASCADE_1_UID_LEN - RFAL_NFCA_SDD_CT_LEN);
+ }
+ else
+ {
+ /* UID Selection complete, Stop Cascade Level loop */
+ ST_MEMCPY( (nfcId1 + *nfcId1Len), (uint8_t*)&selReq.nfcid1, RFAL_NFCA_CASCADE_1_UID_LEN );
+ *nfcId1Len += RFAL_NFCA_CASCADE_1_UID_LEN;
+ return ERR_NONE;
+ }
+ }
+ return ERR_INTERNAL;
+}
+
+
+/*******************************************************************************/
+ReturnCode rfalNfcaPollerFullCollisionResolution( rfalComplianceMode compMode, uint8_t devLimit, rfalNfcaListenDevice *nfcaDevList, uint8_t *devCnt, SPI* mspiChannel, ST25R3911* mST25, DigitalOut* gpio_cs, InterruptIn* IRQ, DigitalOut* fieldLED_01, DigitalOut* fieldLED_02, DigitalOut* fieldLED_03, DigitalOut* fieldLED_04, DigitalOut* fieldLED_05, DigitalOut* fieldLED_06 )
+{
+ ReturnCode ret;
+ bool collPending;
+ rfalNfcaSensRes sensRes;
+ uint16_t rcvLen;
+
+ if( (nfcaDevList == NULL) || (devCnt == NULL) )
+ {
+ return ERR_PARAM;
+ }
+
+ *devCnt = 0;
+ ret = ERR_NONE;
+
+ /*******************************************************************************/
+ /* Send ALL_REQ before Anticollision if a Sleep was sent before Activity 1.1 9.3.4.1 and EMVco 2.6 9.3.2.1 */
+ if( compMode != RFAL_COMPLIANCE_MODE_ISO )
+ {
+ ret = rfalISO14443ATransceiveShortFrame( RFAL_14443A_SHORTFRAME_CMD_WUPA, (uint8_t*)&nfcaDevList->sensRes, rfalConvBytesToBits(sizeof(rfalNfcaSensRes)), &rcvLen, RFAL_NFCA_FDTMIN, mspiChannel, mST25, gpio_cs, IRQ, fieldLED_01, fieldLED_02, fieldLED_03, fieldLED_04, fieldLED_05, fieldLED_06 ) ;
+ if(ret != ERR_NONE)
+ {
+ if( (compMode == RFAL_COMPLIANCE_MODE_EMV) || ((ret != ERR_RF_COLLISION) && (ret != ERR_CRC) && (ret != ERR_FRAMING) && (ret != ERR_PAR)) )
+ {
+ return ret;
+ }
+ }
+
+ /* Check proper SENS_RES/ATQA size */
+ if( (ret == ERR_NONE) && (rfalConvBytesToBits(sizeof(rfalNfcaSensRes)) != rcvLen) )
+ {
+ return ERR_PROTO;
+ }
+ }
+
+
+ #if RFAL_FEATURE_T1T
+ /*******************************************************************************/
+ /* Only check for T1T if previous SENS_RES was received without a transmission *
+ * error. When collisions occur bits in the SENS_RES may look like a T1T */
+ /* If T1T Anticollision is not supported Activity 1.1 9.3.4.3 */
+ if( rfalNfcaIsSensResT1T( &nfcaDevList->sensRes ) && (devLimit != 0) && (ret == ERR_NONE) && (compMode != RFAL_COMPLIANCE_MODE_EMV) )
+ {
+ /* RID_REQ shall be performed with rfalT1TPollerRid() Activity 1.1 9.3.4.24 */
+ rfalT1TPollerInitialize( mspiChannel, mST25, gpio_cs, IRQ, fieldLED_01, fieldLED_02, fieldLED_03, fieldLED_04, fieldLED_05, fieldLED_06 ) ;
+ EXIT_ON_ERR( ret, rfalT1TPollerRid( &nfcaDevList->ridRes, mspiChannel, mST25, gpio_cs, IRQ, fieldLED_01, fieldLED_02, fieldLED_03, fieldLED_04, fieldLED_05, fieldLED_06 ) );
+
+ /* T1T doesn't support Anticollision */
+ *devCnt = 1;
+ nfcaDevList->isSleep = false;
+ nfcaDevList->type = RFAL_NFCA_T1T;
+ nfcaDevList->nfcId1Len = RFAL_NFCA_CASCADE_1_UID_LEN;
+ ST_MEMCPY( &nfcaDevList->nfcId1, &nfcaDevList->ridRes.uid, RFAL_NFCA_CASCADE_1_UID_LEN );
+
+ return ERR_NONE;
+ }
+ #endif /* RFAL_FEATURE_T1T */
+
+ /*******************************************************************************/
+ /* Store the SENS_RES from Technology Detection or from WUPA */
+ sensRes = nfcaDevList->sensRes;
+
+ ST_MEMSET( nfcaDevList, 0x00, (sizeof(rfalNfcaListenDevice) * devLimit) );
+
+ /* Restore the prev SENS_RES, assuming that the SENS_RES received is from first device
+ * When only one device is detected it's not woken up then we'll have no SENS_RES (ATQA) */
+ nfcaDevList->sensRes = sensRes;
+
+
+ /*******************************************************************************/
+ do
+ {
+ EXIT_ON_ERR( ret, rfalNfcaPollerSingleCollisionResolution( devLimit, &collPending, &nfcaDevList[*devCnt].selRes, (uint8_t*)&nfcaDevList[*devCnt].nfcId1, (uint8_t*)&nfcaDevList[*devCnt].nfcId1Len, mspiChannel, mST25, gpio_cs, IRQ, fieldLED_01, fieldLED_02, fieldLED_03, fieldLED_04, fieldLED_05, fieldLED_06 ) );
+
+ /* Assign Listen Device */
+ nfcaDevList[*devCnt].type = (rfalNfcaListenDeviceType) (nfcaDevList[*devCnt].selRes.sak & RFAL_NFCA_SEL_RES_CONF_MASK);
+ nfcaDevList[*devCnt].isSleep = false;
+ (*devCnt)++;
+
+
+ /* If a collision was detected and device counter is lower than limit Activity 1.1 9.3.4.21 */
+ if( (*devCnt < devLimit) && ((collPending) || (compMode != RFAL_COMPLIANCE_MODE_ISO) ) )
+ {
+ /* Put this device to Sleep Activity 1.1 9.3.4.22 */
+ EXIT_ON_ERR( ret, rfalNfcaPollerSleep( mspiChannel, mST25, gpio_cs, IRQ, fieldLED_01, fieldLED_02, fieldLED_03, fieldLED_04, fieldLED_05, fieldLED_06 ) );
+ nfcaDevList[(*devCnt - 1)].isSleep = true;
+
+
+ /* Send a new SENS_REQ to check for other cards Activity 1.1 9.3.4.23 */
+ ret = rfalNfcaPollerCheckPresence( RFAL_14443A_SHORTFRAME_CMD_REQA, &nfcaDevList[*devCnt].sensRes, mspiChannel, mST25, gpio_cs, IRQ, fieldLED_01, fieldLED_02, fieldLED_03, fieldLED_04, fieldLED_05, fieldLED_06 ) ;
+ if( ret == ERR_TIMEOUT )
+ {
+ /* No more devices found */
+ return ERR_NONE;
+ }
+ /* Another device found, continue loop */
+ collPending = true;
+ }
+ else
+ {
+ return ERR_NONE;
+ }
+ }while( (*devCnt < devLimit) && (collPending) );
+
+ return ERR_NONE;
+}
+
+
+/*******************************************************************************/
+ReturnCode rfalNfcaPollerSelect( uint8_t *nfcid1, uint8_t nfcidLen, rfalNfcaSelRes *selRes, SPI* mspiChannel, ST25R3911* mST25, DigitalOut* gpio_cs, InterruptIn* IRQ, DigitalOut* fieldLED_01, DigitalOut* fieldLED_02, DigitalOut* fieldLED_03, DigitalOut* fieldLED_04, DigitalOut* fieldLED_05, DigitalOut* fieldLED_06 )
+{
+ uint8_t i;
+ uint8_t cl;
+ uint8_t nfcidOffset;
+ uint16_t rxLen;
+ ReturnCode ret;
+ rfalNfcaSelReq selReq;
+
+ if( (nfcid1 == NULL) || (nfcidLen > RFAL_NFCA_CASCADE_3_UID_LEN) || (selRes == NULL) )
+ {
+ return ERR_PARAM;
+ }
+
+
+ /* Calculate Cascate Level */
+ cl = rfalNfcaNfcidLen2CL( nfcidLen );
+ nfcidOffset = 0;
+
+ /*******************************************************************************/
+ /* Go through all Cascade Levels Activity 1.1 9.4.4 */
+ for( i = RFAL_NFCA_SEL_CASCADE_L1; i <= cl; i++ )
+ {
+ /* Assign SEL_CMD according to the CLn and SEL_PAR*/
+ selReq.selCmd = rfalNfcaCLn2SELCMD(i);
+ selReq.selPar = RFAL_NFCA_SEL_SELPAR;
+
+ /* Compute NFCID/Data on the SEL_REQ command Digital 1.1 Table 18 */
+ if( cl != i )
+ {
+ *selReq.nfcid1 = RFAL_NFCA_SDD_CT;
+ ST_MEMCPY( (selReq.nfcid1 + RFAL_NFCA_SDD_CT_LEN ), (nfcid1 + nfcidOffset), (RFAL_NFCA_CASCADE_1_UID_LEN - RFAL_NFCA_SDD_CT_LEN) );
+ nfcidOffset += (RFAL_NFCA_CASCADE_1_UID_LEN - RFAL_NFCA_SDD_CT_LEN);
+ }
+ else
+ {
+ ST_MEMCPY( selReq.nfcid1, (nfcid1 + nfcidOffset), RFAL_NFCA_CASCADE_1_UID_LEN );
+ }
+
+ /* Calculate nfcid's BCC */
+ selReq.bcc = rfalNfcaCalculateBcc( (uint8_t*)&selReq.nfcid1, sizeof(selReq.nfcid1) );
+
+ /*******************************************************************************/
+ /* Send SEL_REQ */
+ EXIT_ON_ERR( ret, rfalTransceiveBlockingTxRx( (uint8_t*)&selReq, sizeof(rfalNfcaSelReq), (uint8_t*)selRes, sizeof(rfalNfcaSelRes), &rxLen, RFAL_TXRX_FLAGS_DEFAULT, RFAL_NFCA_FDTMIN, mspiChannel, mST25, gpio_cs, IRQ, fieldLED_01, fieldLED_02, fieldLED_03, fieldLED_04, fieldLED_05, fieldLED_06 ) );
+
+ /* Ensure proper response length */
+ if( rxLen != sizeof(rfalNfcaSelRes) )
+ {
+ return ERR_PROTO;
+ }
+ }
+
+ /* REMARK: Could check if NFCID1 is complete */
+
+ return ERR_NONE;
+}
+
+
+/*******************************************************************************/
+ReturnCode rfalNfcaPollerSleep( SPI* mspiChannel, ST25R3911* mST25, DigitalOut* gpio_cs, InterruptIn* IRQ, DigitalOut* fieldLED_01, DigitalOut* fieldLED_02, DigitalOut* fieldLED_03, DigitalOut* fieldLED_04, DigitalOut* fieldLED_05, DigitalOut* fieldLED_06 )
+{
+ ReturnCode ret;
+ rfalNfcaSlpReq slpReq;
+ uint8_t rxBuf; /* dummy buffer, just to perform Rx */
+
+ slpReq.frame[RFAL_NFCA_SLP_CMD_POS] = RFAL_NFCA_SLP_CMD;
+ slpReq.frame[RFAL_NFCA_SLP_BYTE2_POS] = RFAL_NFCA_SLP_BYTE2;
+
+ /* ISO14443-3 6.4.3 HLTA - If PICC responds with any modulation during 1 ms this response shall be interpreted as not acknowledge */
+ ret = rfalTransceiveBlockingTxRx( (uint8_t*)&slpReq, sizeof(rfalNfcaSlpReq), &rxBuf, sizeof(rxBuf), NULL, RFAL_TXRX_FLAGS_DEFAULT, RFAL_NFCA_SLP_FWT, mspiChannel, mST25, gpio_cs, IRQ, fieldLED_01, fieldLED_02, fieldLED_03, fieldLED_04, fieldLED_05, fieldLED_06 ) ;
+ if( ret != ERR_TIMEOUT )
+ {
+ return ret;
+ }
+
+ return ERR_NONE;
+}
+
+
+/*******************************************************************************/
+bool rfalNfcaListenerIsSleepReq( uint8_t *buf, uint16_t bufLen )
+{
+ /* Check if length and payload match */
+ if( (bufLen != sizeof(rfalNfcaSlpReq)) || (buf[RFAL_NFCA_SLP_CMD_POS] != RFAL_NFCA_SLP_CMD) || (buf[RFAL_NFCA_SLP_BYTE2_POS] != RFAL_NFCA_SLP_BYTE2) )
+ {
+ return false;
+ }
+
+ return true;
+}
+
+#endif /* RFAL_FEATURE_NFCA */