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unleashed-firmware/lib/ST25RFAL002/source/rfal_nfca.c
あく 389ff92cc1
Naming and coding style convention, new linter tool. (#945) 
* Makefile, Scripts: new linter
* About: remove ID from IC
* Firmware: remove double define for DIVC/DIVR
* Scripts: check folder names too. Docker: replace syntax check with make lint.
* Reformat Sources and Migrate to new file naming convention
* Docker: symlink clang-format-12 to clang-format
* Add coding style guide
2022-01-05 19:10:18 +03:00

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/******************************************************************************
* \attention
*
* <h2><center>&copy; COPYRIGHT 2020 STMicroelectronics</center></h2>
*
* Licensed under ST MYLIBERTY SOFTWARE LICENSE AGREEMENT (the "License");
* You may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* www.st.com/myliberty
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied,
* AND SPECIFICALLY DISCLAIMING THE IMPLIED WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/*
* PROJECT: 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 "rfal_nfca.h"
#include "utils.h"
/*
******************************************************************************
* ENABLE SWITCH
******************************************************************************
*/
#ifndef RFAL_FEATURE_NFCA
#define RFAL_FEATURE_NFCA false /* NFC-A module configuration missing. Disabled by default */
#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 0x50U /*!< SLP cmd (byte1) Digital 1.1 6.9.1 & Table 20 */
#define RFAL_NFCA_SLP_BYTE2 0x00U /*!< SLP byte2 Digital 1.1 6.9.1 & Table 20 */
#define RFAL_NFCA_SLP_CMD_POS 0U /*!< SLP cmd position Digital 1.1 6.9.1 & Table 20 */
#define RFAL_NFCA_SLP_BYTE2_POS 1U /*!< SLP byte2 position Digital 1.1 6.9.1 & Table 20 */
#define RFAL_NFCA_SDD_CT 0x88U /*!< Cascade Tag value Digital 1.1 6.7.2 */
#define RFAL_NFCA_SDD_CT_LEN 1U /*!< Cascade Tag length */
#define RFAL_NFCA_SLP_REQ_LEN 2U /*!< SLP_REQ length */
#define RFAL_NFCA_SEL_CMD_LEN 1U /*!< SEL_CMD length */
#define RFAL_NFCA_SEL_PAR_LEN 1U /*!< SEL_PAR length */
#define RFAL_NFCA_SEL_SELPAR \
rfalNfcaSelPar(7U, 0U) /*!< SEL_PAR on Select is always with 4 data/nfcid */
#define RFAL_NFCA_BCC_LEN 1U /*!< 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 5U /*!< t RETRANSMISSION [3, 33]ms EMVCo 2.6 A.5 */
#define RFAL_NFCA_N_RETRANS 2U /*!< 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) \
(uint8_t)( \
(((nBy) << 4U) & 0xF0U) | \
((nbi)&0x0FU)) /*!< Calculates SEL_PAR with the bytes/bits to be sent */
#define rfalNfcaCLn2SELCMD(cl) \
(uint8_t)( \
(uint8_t)(RFAL_NFCA_CMD_SEL_CL1) + \
(2U * (cl))) /*!< Calculates SEL_CMD with the given cascade level */
#define rfalNfcaNfcidLen2CL(len) \
((len) / 5U) /*!< Calculates cascade level by the NFCID length */
#define rfalNfcaRunBlocking(e, fn) \
do { \
(e) = (fn); \
rfalWorker(); \
} while((e) == ERR_BUSY) /*!< Macro used for the blocking methods */
/*
******************************************************************************
* GLOBAL TYPES
******************************************************************************
*/
/*! Colission Resolution states */
typedef enum {
RFAL_NFCA_CR_IDLE, /*!< IDLE state */
RFAL_NFCA_CR_CL, /*!< New Cascading Level state */
RFAL_NFCA_CR_SDD, /*!< Perform anticollsion state */
RFAL_NFCA_CR_SEL, /*!< Perform CL Selection state */
RFAL_NFCA_CR_DONE /*!< Collision Resolution done state */
} colResState;
/*! Colission Resolution context */
typedef struct {
uint8_t devLimit; /*!< Device limit to be used */
rfalComplianceMode compMode; /*!< Compliancy mode to be used */
rfalNfcaListenDevice*
nfcaDevList; /*!< Location of the device list */
uint8_t* devCnt; /*!< Location of the device counter */
bool collPending; /*!< Collision pending flag */
bool* collPend; /*!< Location of collision pending flag (Single CR) */
rfalNfcaSelReq selReq; /*!< SelReqused during anticollision (Single CR) */
rfalNfcaSelRes* selRes; /*!< Location to place of the SEL_RES(SAK) (Single CR) */
uint8_t* nfcId1; /*!< Location to place the NFCID1 (Single CR) */
uint8_t* nfcId1Len; /*!< Location to place the NFCID1 length (Single CR) */
uint8_t cascadeLv; /*!< Current Cascading Level (Single CR) */
colResState state; /*!< Single Collision Resolution state (Single CR) */
uint8_t bytesTxRx; /*!< TxRx bytes used during anticollision loop (Single CR) */
uint8_t bitsTxRx; /*!< TxRx bits used during anticollision loop (Single CR) */
uint16_t rxLen;
uint32_t tmrFDT; /*!< FDT timer used between SED_REQs (Single CR) */
uint8_t retries; /*!< Retries to be performed upon a timeout error (Single CR)*/
uint8_t backtrackCnt; /*!< Backtrack retries (Single CR) */
bool doBacktrack; /*!< Backtrack flag (Single CR) */
} colResParams;
/*! RFAL NFC-A instance */
typedef struct {
colResParams CR; /*!< Collision Resolution context */
} rfalNfca;
/*! 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 VARIABLES
******************************************************************************
*/
static rfalNfca gNfca; /*!< RFAL NFC-A instance */
/*
******************************************************************************
* LOCAL FUNCTION PROTOTYPES
******************************************************************************
*/
static uint8_t rfalNfcaCalculateBcc(const uint8_t* buf, uint8_t bufLen);
static ReturnCode rfalNfcaPollerStartSingleCollisionResolution(
uint8_t devLimit,
bool* collPending,
rfalNfcaSelRes* selRes,
uint8_t* nfcId1,
uint8_t* nfcId1Len);
static ReturnCode rfalNfcaPollerGetSingleCollisionResolutionStatus(void);
/*
******************************************************************************
* LOCAL FUNCTIONS
******************************************************************************
*/
static uint8_t rfalNfcaCalculateBcc(const 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;
}
/*******************************************************************************/
static ReturnCode rfalNfcaPollerStartSingleCollisionResolution(
uint8_t devLimit,
bool* collPending,
rfalNfcaSelRes* selRes,
uint8_t* nfcId1,
uint8_t* nfcId1Len) {
/* 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);
/* Save parameters */
gNfca.CR.devLimit = devLimit;
gNfca.CR.collPend = collPending;
gNfca.CR.selRes = selRes;
gNfca.CR.nfcId1 = nfcId1;
gNfca.CR.nfcId1Len = nfcId1Len;
platformTimerDestroy(gNfca.CR.tmrFDT);
gNfca.CR.tmrFDT = 0U;
gNfca.CR.retries = RFAL_NFCA_N_RETRANS;
gNfca.CR.cascadeLv = (uint8_t)RFAL_NFCA_SEL_CASCADE_L1;
gNfca.CR.state = RFAL_NFCA_CR_CL;
gNfca.CR.doBacktrack = false;
gNfca.CR.backtrackCnt = 3U;
return ERR_NONE;
}
/*******************************************************************************/
static ReturnCode rfalNfcaPollerGetSingleCollisionResolutionStatus(void) {
ReturnCode ret;
uint8_t collBit = 1U; /* standards mandate or recommend collision bit to be set to One. */
/* Check if FDT timer is still running */
if(!platformTimerIsExpired(gNfca.CR.tmrFDT) && (gNfca.CR.tmrFDT != 0U)) {
return ERR_BUSY;
}
/*******************************************************************************/
/* Go through all Cascade Levels Activity 1.1 9.3.4 */
if(gNfca.CR.cascadeLv > (uint8_t)RFAL_NFCA_SEL_CASCADE_L3) {
return ERR_INTERNAL;
}
switch(gNfca.CR.state) {
/*******************************************************************************/
case RFAL_NFCA_CR_CL:
/* Initialize the SDD_REQ to send for the new cascade level */
ST_MEMSET((uint8_t*)&gNfca.CR.selReq, 0x00, sizeof(rfalNfcaSelReq));
gNfca.CR.bytesTxRx = RFAL_NFCA_SDD_REQ_LEN;
gNfca.CR.bitsTxRx = 0U;
gNfca.CR.state = RFAL_NFCA_CR_SDD;
/* fall through */
/*******************************************************************************/
case RFAL_NFCA_CR_SDD: /* PRQA S 2003 # MISRA 16.3 - Intentional fall through */
/* Calculate SEL_CMD and SEL_PAR with the bytes/bits to be sent */
gNfca.CR.selReq.selCmd = rfalNfcaCLn2SELCMD(gNfca.CR.cascadeLv);
gNfca.CR.selReq.selPar = rfalNfcaSelPar(gNfca.CR.bytesTxRx, gNfca.CR.bitsTxRx);
/* Send SDD_REQ (Anticollision frame) */
ret = rfalISO14443ATransceiveAnticollisionFrame(
(uint8_t*)&gNfca.CR.selReq,
&gNfca.CR.bytesTxRx,
&gNfca.CR.bitsTxRx,
&gNfca.CR.rxLen,
RFAL_NFCA_FDTMIN);
/* Retry upon timeout EMVCo 2.6 9.6.1.3 */
if((ret == ERR_TIMEOUT) && (gNfca.CR.devLimit == 0U) && (gNfca.CR.retries != 0U)) {
gNfca.CR.retries--;
platformTimerDestroy(gNfca.CR.tmrFDT);
gNfca.CR.tmrFDT = platformTimerCreate(RFAL_NFCA_T_RETRANS);
break;
}
/* Covert rxLen into bytes */
gNfca.CR.rxLen = rfalConvBitsToBytes(gNfca.CR.rxLen);
if((ret == ERR_TIMEOUT) && (gNfca.CR.backtrackCnt != 0U) && (!gNfca.CR.doBacktrack) &&
!((RFAL_NFCA_SDD_REQ_LEN == gNfca.CR.bytesTxRx) && (0U == gNfca.CR.bitsTxRx))) {
/* In multiple card scenarios it may always happen that some
* collisions of a weaker tag go unnoticed. If then a later
* collision is recognized and the strong tag has a 0 at the
* collision position then no tag will respond. Catch this
* corner case and then try with the bit being sent as zero. */
rfalNfcaSensRes sensRes;
ret = ERR_RF_COLLISION;
rfalNfcaPollerCheckPresence(RFAL_14443A_SHORTFRAME_CMD_REQA, &sensRes);
/* Algorithm below does a post-increment, decrement to go back to current position */
if(0U == gNfca.CR.bitsTxRx) {
gNfca.CR.bitsTxRx = 7;
gNfca.CR.bytesTxRx--;
} else {
gNfca.CR.bitsTxRx--;
}
collBit =
(uint8_t)(((uint8_t*)&gNfca.CR.selReq)[gNfca.CR.bytesTxRx] & (1U << gNfca.CR.bitsTxRx));
collBit = (uint8_t)((0U == collBit) ? 1U : 0U); // invert the collision bit
gNfca.CR.doBacktrack = true;
gNfca.CR.backtrackCnt--;
} else {
gNfca.CR.doBacktrack = false;
}
if(ret == ERR_RF_COLLISION) {
/* Check received length */
if((gNfca.CR.bytesTxRx + ((gNfca.CR.bitsTxRx != 0U) ? 1U : 0U)) >
(RFAL_NFCA_SDD_RES_LEN + RFAL_NFCA_SDD_REQ_LEN)) {
return ERR_PROTO;
}
if(((gNfca.CR.bytesTxRx + ((gNfca.CR.bitsTxRx != 0U) ? 1U : 0U)) >
(RFAL_NFCA_CASCADE_1_UID_LEN + RFAL_NFCA_SDD_REQ_LEN)) &&
(gNfca.CR.backtrackCnt != 0U)) { /* Collision in BCC: Anticollide only UID part */
gNfca.CR.backtrackCnt--;
gNfca.CR.bytesTxRx = RFAL_NFCA_CASCADE_1_UID_LEN + RFAL_NFCA_SDD_REQ_LEN - 1U;
gNfca.CR.bitsTxRx = 7;
collBit =
(uint8_t)(((uint8_t*)&gNfca.CR.selReq)[gNfca.CR.bytesTxRx] & (1U << gNfca.CR.bitsTxRx)); /* Not a real collision, extract the actual bit for the subsequent code */
}
if((gNfca.CR.devLimit == 0U) && !(*gNfca.CR.collPend)) {
/* 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 */
*gNfca.CR.collPend = true;
return ERR_IGNORE;
}
*gNfca.CR.collPend = true;
/* Set and select the collision bit, with the number of bytes/bits successfully TxRx */
if(collBit != 0U) {
((uint8_t*)&gNfca.CR.selReq)[gNfca.CR.bytesTxRx] =
(uint8_t)(((uint8_t*)&gNfca.CR.selReq)[gNfca.CR.bytesTxRx] | (1U << gNfca.CR.bitsTxRx)); /* MISRA 10.3 */
} else {
((uint8_t*)&gNfca.CR.selReq)[gNfca.CR.bytesTxRx] =
(uint8_t)(((uint8_t*)&gNfca.CR.selReq)[gNfca.CR.bytesTxRx] & ~(1U << gNfca.CR.bitsTxRx)); /* MISRA 10.3 */
}
gNfca.CR.bitsTxRx++;
/* Check if number of bits form a byte */
if(gNfca.CR.bitsTxRx == RFAL_BITS_IN_BYTE) {
gNfca.CR.bitsTxRx = 0;
gNfca.CR.bytesTxRx++;
}
break;
}
/*******************************************************************************/
/* 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((gNfca.CR.devLimit == 0U) && (gNfca.CR.rxLen != sizeof(rfalNfcaSddRes))) {
return ERR_PROTO;
}
/* Check if the received BCC match */
if(gNfca.CR.selReq.bcc !=
rfalNfcaCalculateBcc(gNfca.CR.selReq.nfcid1, RFAL_NFCA_CASCADE_1_UID_LEN)) {
return ERR_PROTO;
}
/*******************************************************************************/
/* Anticollision OK, Select this Cascade Level */
gNfca.CR.selReq.selPar = RFAL_NFCA_SEL_SELPAR;
gNfca.CR.retries = RFAL_NFCA_N_RETRANS;
gNfca.CR.state = RFAL_NFCA_CR_SEL;
break;
/*******************************************************************************/
case RFAL_NFCA_CR_SEL:
/* Send SEL_REQ (Select command) - Retry upon timeout EMVCo 2.6 9.6.1.3 */
ret = rfalTransceiveBlockingTxRx(
(uint8_t*)&gNfca.CR.selReq,
sizeof(rfalNfcaSelReq),
(uint8_t*)gNfca.CR.selRes,
sizeof(rfalNfcaSelRes),
&gNfca.CR.rxLen,
RFAL_TXRX_FLAGS_DEFAULT,
RFAL_NFCA_FDTMIN);
/* Retry upon timeout EMVCo 2.6 9.6.1.3 */
if((ret == ERR_TIMEOUT) && (gNfca.CR.devLimit == 0U) && (gNfca.CR.retries != 0U)) {
gNfca.CR.retries--;
platformTimerDestroy(gNfca.CR.tmrFDT);
gNfca.CR.tmrFDT = platformTimerCreate(RFAL_NFCA_T_RETRANS);
break;
}
if(ret != ERR_NONE) {
return ret;
}
/* Ensure proper response length */
if(gNfca.CR.rxLen != sizeof(rfalNfcaSelRes)) {
return ERR_PROTO;
}
/*******************************************************************************/
/* Check cascade byte, if cascade tag then go next cascade level */
if(*gNfca.CR.selReq.nfcid1 == RFAL_NFCA_SDD_CT) {
/* Cascade Tag present, store nfcid1 bytes (excluding cascade tag) and continue for next CL */
ST_MEMCPY(
&gNfca.CR.nfcId1[*gNfca.CR.nfcId1Len],
&((uint8_t*)&gNfca.CR.selReq.nfcid1)[RFAL_NFCA_SDD_CT_LEN],
(RFAL_NFCA_CASCADE_1_UID_LEN - RFAL_NFCA_SDD_CT_LEN));
*gNfca.CR.nfcId1Len += (RFAL_NFCA_CASCADE_1_UID_LEN - RFAL_NFCA_SDD_CT_LEN);
/* Go to next cascade level */
gNfca.CR.state = RFAL_NFCA_CR_CL;
gNfca.CR.cascadeLv++;
} else {
/* UID Selection complete, Stop Cascade Level loop */
ST_MEMCPY(
&gNfca.CR.nfcId1[*gNfca.CR.nfcId1Len],
(uint8_t*)&gNfca.CR.selReq.nfcid1,
RFAL_NFCA_CASCADE_1_UID_LEN);
*gNfca.CR.nfcId1Len += RFAL_NFCA_CASCADE_1_UID_LEN;
gNfca.CR.state = RFAL_NFCA_CR_DONE;
break; /* Only flag operation complete on the next execution */
}
break;
/*******************************************************************************/
case RFAL_NFCA_CR_DONE:
return ERR_NONE;
/*******************************************************************************/
default:
return ERR_WRONG_STATE;
}
return ERR_BUSY;
}
/*
******************************************************************************
* GLOBAL FUNCTIONS
******************************************************************************
*/
/*******************************************************************************/
ReturnCode rfalNfcaPollerInitialize(void) {
ReturnCode ret;
EXIT_ON_ERR(ret, rfalSetMode(RFAL_MODE_POLL_NFCA, RFAL_BR_106, RFAL_BR_106));
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) {
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,
(uint8_t)rfalConvBytesToBits(sizeof(rfalNfcaSensRes)),
&rcvLen,
RFAL_NFCA_FDTMIN);
if((ret == ERR_RF_COLLISION) || (ret == ERR_CRC) || (ret == ERR_NOMEM) ||
(ret == ERR_FRAMING) || (ret == ERR_PAR)) {
ret = ERR_NONE;
}
return ret;
}
/*******************************************************************************/
ReturnCode
rfalNfcaPollerTechnologyDetection(rfalComplianceMode compMode, rfalNfcaSensRes* sensRes) {
ReturnCode ret;
EXIT_ON_ERR(
ret,
rfalNfcaPollerCheckPresence(
((compMode == RFAL_COMPLIANCE_MODE_EMV) ? RFAL_14443A_SHORTFRAME_CMD_WUPA :
RFAL_14443A_SHORTFRAME_CMD_REQA),
sensRes));
/* 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) {
rfalNfcaPollerSleep();
}
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode rfalNfcaPollerSingleCollisionResolution(
uint8_t devLimit,
bool* collPending,
rfalNfcaSelRes* selRes,
uint8_t* nfcId1,
uint8_t* nfcId1Len) {
ReturnCode ret;
EXIT_ON_ERR(
ret,
rfalNfcaPollerStartSingleCollisionResolution(
devLimit, collPending, selRes, nfcId1, nfcId1Len));
rfalNfcaRunBlocking(ret, rfalNfcaPollerGetSingleCollisionResolutionStatus());
return ret;
}
/*******************************************************************************/
ReturnCode rfalNfcaPollerStartFullCollisionResolution(
rfalComplianceMode compMode,
uint8_t devLimit,
rfalNfcaListenDevice* nfcaDevList,
uint8_t* devCnt) {
ReturnCode ret;
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,
(uint8_t)rfalConvBytesToBits(sizeof(rfalNfcaSensRes)),
&rcvLen,
RFAL_NFCA_FDTMIN);
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;
}
}
/*******************************************************************************/
/* Store the SENS_RES from Technology Detection or from WUPA */
sensRes = nfcaDevList->sensRes;
if(devLimit > 0U) /* MISRA 21.18 */
{
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;
/* Save parameters */
gNfca.CR.devCnt = devCnt;
gNfca.CR.devLimit = devLimit;
gNfca.CR.nfcaDevList = nfcaDevList;
gNfca.CR.compMode = compMode;
#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 != 0U) && (ret == ERR_NONE) &&
(compMode != RFAL_COMPLIANCE_MODE_EMV)) {
/* RID_REQ shall be performed Activity 1.1 9.3.4.24 */
rfalT1TPollerInitialize();
EXIT_ON_ERR(ret, rfalT1TPollerRid(&nfcaDevList->ridRes));
*devCnt = 1U;
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 */
return rfalNfcaPollerStartSingleCollisionResolution(
devLimit,
&gNfca.CR.collPending,
&nfcaDevList->selRes,
(uint8_t*)&nfcaDevList->nfcId1,
&nfcaDevList->nfcId1Len);
}
/*******************************************************************************/
ReturnCode rfalNfcaPollerGetFullCollisionResolutionStatus(void) {
ReturnCode ret;
uint8_t newDevType;
if((gNfca.CR.nfcaDevList == NULL) || (gNfca.CR.devCnt == NULL)) {
return ERR_WRONG_STATE;
}
/*******************************************************************************/
/* Check whether a T1T has already been detected */
if(rfalNfcaIsSensResT1T(&gNfca.CR.nfcaDevList->sensRes) &&
(gNfca.CR.nfcaDevList->type == RFAL_NFCA_T1T)) {
/* T1T doesn't support Anticollision */
return ERR_NONE;
}
/*******************************************************************************/
EXIT_ON_ERR(ret, rfalNfcaPollerGetSingleCollisionResolutionStatus());
/* Assign Listen Device */
newDevType = ((uint8_t)gNfca.CR.nfcaDevList[*gNfca.CR.devCnt].selRes.sak) &
RFAL_NFCA_SEL_RES_CONF_MASK; /* MISRA 10.8 */
/* PRQA S 4342 1 # MISRA 10.5 - Guaranteed that no invalid enum values are created: see guard_eq_RFAL_NFCA_T2T, .... */
gNfca.CR.nfcaDevList[*gNfca.CR.devCnt].type = (rfalNfcaListenDeviceType)newDevType;
gNfca.CR.nfcaDevList[*gNfca.CR.devCnt].isSleep = false;
(*gNfca.CR.devCnt)++;
/* If a collision was detected and device counter is lower than limit Activity 1.1 9.3.4.21 */
if((*gNfca.CR.devCnt < gNfca.CR.devLimit) && (gNfca.CR.collPending)) {
/* Put this device to Sleep Activity 1.1 9.3.4.22 */
rfalNfcaPollerSleep();
gNfca.CR.nfcaDevList[(*gNfca.CR.devCnt - 1U)].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, &gNfca.CR.nfcaDevList[*gNfca.CR.devCnt].sensRes);
if(ret == ERR_TIMEOUT) {
/* No more devices found, exit */
gNfca.CR.collPending = false;
} else {
/* Another device found, continue loop */
gNfca.CR.collPending = true;
}
} else {
/* Exit loop */
gNfca.CR.collPending = false;
}
/*******************************************************************************/
/* Check if collision resolution shall continue */
if((*gNfca.CR.devCnt < gNfca.CR.devLimit) && (gNfca.CR.collPending)) {
EXIT_ON_ERR(
ret,
rfalNfcaPollerStartSingleCollisionResolution(
gNfca.CR.devLimit,
&gNfca.CR.collPending,
&gNfca.CR.nfcaDevList[*gNfca.CR.devCnt].selRes,
(uint8_t*)&gNfca.CR.nfcaDevList[*gNfca.CR.devCnt].nfcId1,
&gNfca.CR.nfcaDevList[*gNfca.CR.devCnt].nfcId1Len));
return ERR_BUSY;
}
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode rfalNfcaPollerFullCollisionResolution(
rfalComplianceMode compMode,
uint8_t devLimit,
rfalNfcaListenDevice* nfcaDevList,
uint8_t* devCnt) {
ReturnCode ret;
EXIT_ON_ERR(
ret, rfalNfcaPollerStartFullCollisionResolution(compMode, devLimit, nfcaDevList, devCnt));
rfalNfcaRunBlocking(ret, rfalNfcaPollerGetFullCollisionResolutionStatus());
return ret;
}
ReturnCode rfalNfcaPollerSleepFullCollisionResolution(
uint8_t devLimit,
rfalNfcaListenDevice* nfcaDevList,
uint8_t* devCnt) {
bool firstRound;
uint8_t tmpDevCnt;
ReturnCode ret;
if((nfcaDevList == NULL) || (devCnt == NULL)) {
return ERR_PARAM;
}
/* Only use ALL_REQ (WUPA) on the first round */
firstRound = true;
*devCnt = 0;
/* Perform collision resolution until no new device is found */
do {
tmpDevCnt = 0;
ret = rfalNfcaPollerFullCollisionResolution(
(firstRound ? RFAL_COMPLIANCE_MODE_NFC : RFAL_COMPLIANCE_MODE_ISO),
(devLimit - *devCnt),
&nfcaDevList[*devCnt],
&tmpDevCnt);
if((ret == ERR_NONE) && (tmpDevCnt > 0U)) {
*devCnt += tmpDevCnt;
/* Check whether to seacrh for more devices */
if(*devCnt < devLimit) {
/* Set last found device to sleep (all others are slept already) */
rfalNfcaPollerSleep();
nfcaDevList[((*devCnt) - 1U)].isSleep = true;
/* Check if any other device is present */
ret = rfalNfcaPollerCheckPresence(
RFAL_14443A_SHORTFRAME_CMD_REQA, &nfcaDevList[*devCnt].sensRes);
if(ret == ERR_NONE) {
firstRound = false;
continue;
}
}
}
break;
} while(true);
return ((*devCnt > 0U) ? ERR_NONE : ret);
}
/*******************************************************************************/
ReturnCode rfalNfcaPollerSelect(const uint8_t* nfcid1, uint8_t nfcidLen, rfalNfcaSelRes* selRes) {
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));
/* Ensure proper response length */
if(rxLen != sizeof(rfalNfcaSelRes)) {
return ERR_PROTO;
}
}
/* REMARK: Could check if NFCID1 is complete */
return ERR_NONE;
}
/*******************************************************************************/
ReturnCode rfalNfcaPollerSleep(void) {
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;
rfalTransceiveBlockingTxRx(
(uint8_t*)&slpReq,
sizeof(rfalNfcaSlpReq),
&rxBuf,
sizeof(rxBuf),
NULL,
RFAL_TXRX_FLAGS_DEFAULT,
RFAL_NFCA_SLP_FWT);
/* ISO14443-3 6.4.3 HLTA - If PICC responds with any modulation during 1 ms this response shall be interpreted as not acknowledge
Digital 2.0 6.9.2.1 & EMVCo 3.0 5.6.2.1 - consider the HLTA command always acknowledged
No check to be compliant with NFC and EMVCo, and to improve interoprability (Kovio RFID Tag)
*/
return ERR_NONE;
}
/*******************************************************************************/
bool rfalNfcaListenerIsSleepReq(const 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;
}
/* If the guards here don't compile then the code above cannot work anymore. */
extern uint8_t guard_eq_RFAL_NFCA_T2T
[((RFAL_NFCA_SEL_RES_CONF_MASK & (uint8_t)RFAL_NFCA_T2T) == (uint8_t)RFAL_NFCA_T2T) ? 1 : (-1)];
extern uint8_t guard_eq_RFAL_NFCA_T4T
[((RFAL_NFCA_SEL_RES_CONF_MASK & (uint8_t)RFAL_NFCA_T4T) == (uint8_t)RFAL_NFCA_T4T) ? 1 : (-1)];
extern uint8_t guard_eq_RFAL_NFCA_NFCDEP
[((RFAL_NFCA_SEL_RES_CONF_MASK & (uint8_t)RFAL_NFCA_NFCDEP) == (uint8_t)RFAL_NFCA_NFCDEP) ?
1 :
(-1)];
extern uint8_t guard_eq_RFAL_NFCA_T4T_NFCDEP
[((RFAL_NFCA_SEL_RES_CONF_MASK & (uint8_t)RFAL_NFCA_T4T_NFCDEP) ==
(uint8_t)RFAL_NFCA_T4T_NFCDEP) ?
1 :
(-1)];
#endif /* RFAL_FEATURE_NFCA */
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