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nfc_initiator_transceive_bits_timed() function returns now received bits count on success and libnfc error code on failure.

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This commit is contained in:
Audrey Diacre 2012-01-04 13:18:11 +00:00
parent d02da0db64
commit 1c49329ffa
5 changed files with 15 additions and 14 deletions
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2
include/nfc/nfc.h
View file

@ -80,7 +80,7 @@ extern "C" {
NFC_EXPORT int nfc_initiator_transceive_bytes (nfc_device *pnd, const uint8_t *pbtTx, const size_t szTx, uint8_t *pbtRx, size_t *pszRx, int timeout);
NFC_EXPORT int nfc_initiator_transceive_bits (nfc_device *pnd, const uint8_t *pbtTx, const size_t szTxBits, const uint8_t *pbtTxPar, uint8_t *pbtRx, size_t *pszRxBits, uint8_t *pbtRxPar);
NFC_EXPORT int nfc_initiator_transceive_bytes_timed (nfc_device *pnd, const uint8_t *pbtTx, const size_t szTx, uint8_t *pbtRx, size_t *pszRx, uint32_t *cycles);
NFC_EXPORT bool nfc_initiator_transceive_bits_timed (nfc_device *pnd, const uint8_t *pbtTx, const size_t szTxBits, const uint8_t *pbtTxPar, uint8_t *pbtRx, size_t *pszRxBits, uint8_t *pbtRxPar, uint32_t *cycles);
NFC_EXPORT int nfc_initiator_transceive_bits_timed (nfc_device *pnd, const uint8_t *pbtTx, const size_t szTxBits, const uint8_t *pbtTxPar, uint8_t *pbtRx, size_t *pszRxBits, uint8_t *pbtRxPar, uint32_t *cycles);
/* NFC target: act as tag (i.e. MIFARE Classic) or NFC target device. */
NFC_EXPORT int nfc_target_init (nfc_device *pnd, nfc_target *pnt, uint8_t *pbtRx, size_t *pszRx);

19
libnfc/chips/pn53x.c
View file

@ -1310,7 +1310,7 @@ uint32_t __pn53x_get_timer(struct nfc_device *pnd, const uint8_t last_cmd_byte)
return u32cycles;
}
bool
int
pn53x_initiator_transceive_bits_timed (struct nfc_device *pnd, const uint8_t *pbtTx, const size_t szTxBits,
const uint8_t *pbtTxPar, uint8_t *pbtRx, size_t *pszRxBits, uint8_t *pbtRxPar, uint32_t *cycles)
{
@ -1319,21 +1319,22 @@ pn53x_initiator_transceive_bits_timed (struct nfc_device *pnd, const uint8_t *pb
(void) pbtRxPar;
uint16_t i;
uint8_t sz;
int res = 0;
// Sorry, no arbitrary parity bits support for now
if (!pnd->bPar) {
pnd->last_error = NFC_ENOTIMPL;
return false;
return pnd->last_error;
}
// Sorry, no easy framing support
if (pnd->bEasyFraming) {
pnd->last_error = NFC_ENOTIMPL;
return false;
return pnd->last_error;
}
// TODO CRC support but it probably doesn't make sense for (szTxBits % 8 != 0) ...
if (pnd->bCrc) {
pnd->last_error = NFC_ENOTIMPL;
return false;
return pnd->last_error;
}
__pn53x_init_timer(pnd, *cycles);
@ -1361,8 +1362,8 @@ pn53x_initiator_transceive_bits_timed (struct nfc_device *pnd, const uint8_t *pb
BUFFER_APPEND (abtWriteRegisterCmd, PN53X_REG_CIU_BitFraming & 0xff);
BUFFER_APPEND (abtWriteRegisterCmd, SYMBOL_START_SEND | ((szTxBits % 8) & SYMBOL_TX_LAST_BITS));
// Let's send the previously constructed WriteRegister command
if (pn53x_transceive (pnd, abtWriteRegisterCmd, BUFFER_SIZE (abtWriteRegisterCmd), NULL, NULL, -1) < 0) {
return false;
if ((res = pn53x_transceive (pnd, abtWriteRegisterCmd, BUFFER_SIZE (abtWriteRegisterCmd), NULL, NULL, -1)) < 0) {
return res;
}
// Recv data
@ -1393,8 +1394,8 @@ pn53x_initiator_transceive_bits_timed (struct nfc_device *pnd, const uint8_t *pb
uint8_t abtRes[PN53x_EXTENDED_FRAME__DATA_MAX_LEN];
size_t szRes = sizeof(abtRes);
// Let's send the previously constructed ReadRegister command
if (pn53x_transceive (pnd, abtReadRegisterCmd, BUFFER_SIZE (abtReadRegisterCmd), abtRes, &szRes, -1) < 0) {
return false;
if ((res = pn53x_transceive (pnd, abtReadRegisterCmd, BUFFER_SIZE (abtReadRegisterCmd), abtRes, &szRes, -1)) < 0) {
return res;
}
for (i = 0; i < sz; i++) {
pbtRx[i+*pszRxBits] = abtRes[i+off];
@ -1409,7 +1410,7 @@ pn53x_initiator_transceive_bits_timed (struct nfc_device *pnd, const uint8_t *pb
// Recv corrected timer value
*cycles = __pn53x_get_timer (pnd, pbtTx[szTxBits / 8]);
return true;
return *pszRxBits;
}
int

2
libnfc/chips/pn53x.h
View file

@ -304,7 +304,7 @@ int pn53x_initiator_transceive_bits (struct nfc_device *pnd, const uint8_t *p
uint8_t *pbtRxPar);
int pn53x_initiator_transceive_bytes (struct nfc_device *pnd, const uint8_t *pbtTx, const size_t szTx,
uint8_t *pbtRx, size_t *pszRx, int timeout);
bool pn53x_initiator_transceive_bits_timed (struct nfc_device *pnd, const uint8_t *pbtTx, const size_t szTxBits,
int pn53x_initiator_transceive_bits_timed (struct nfc_device *pnd, const uint8_t *pbtTx, const size_t szTxBits,
const uint8_t *pbtTxPar, uint8_t *pbtRx, size_t *pszRxBits,
uint8_t *pbtRxPar, uint32_t *cycles);
int pn53x_initiator_transceive_bytes_timed (struct nfc_device *pnd, const uint8_t *pbtTx, const size_t szTx,

2
libnfc/nfc-internal.h
View file

@ -140,7 +140,7 @@ struct nfc_driver_t {
int (*initiator_transceive_bytes) (struct nfc_device *pnd, const uint8_t * pbtTx, const size_t szTx, uint8_t * pbtRx, size_t * pszRx, int timeout);
int (*initiator_transceive_bits) (struct nfc_device *pnd, const uint8_t * pbtTx, const size_t szTxBits, const uint8_t * pbtTxPar, uint8_t * pbtRx, size_t * pszRxBits, uint8_t * pbtRxPar);
int (*initiator_transceive_bytes_timed) (struct nfc_device *pnd, const uint8_t * pbtTx, const size_t szTx, uint8_t * pbtRx, size_t * pszRx, uint32_t * cycles);
bool (*initiator_transceive_bits_timed) (struct nfc_device *pnd, const uint8_t * pbtTx, const size_t szTxBits, const uint8_t * pbtTxPar, uint8_t * pbtRx, size_t * pszRxBits, uint8_t * pbtRxPar, uint32_t * cycles);
int (*initiator_transceive_bits_timed) (struct nfc_device *pnd, const uint8_t * pbtTx, const size_t szTxBits, const uint8_t * pbtTxPar, uint8_t * pbtRx, size_t * pszRxBits, uint8_t * pbtRxPar, uint32_t * cycles);
int (*target_init) (struct nfc_device *pnd, nfc_target * pnt, uint8_t * pbtRx, size_t * pszRx);
int (*target_send_bytes) (struct nfc_device *pnd, const uint8_t * pbtTx, const size_t szTx, int timeout);

4
libnfc/nfc.c
View file

@ -573,7 +573,7 @@ nfc_initiator_transceive_bytes_timed (nfc_device *pnd, const uint8_t *pbtTx, con
/**
* @brief Transceive raw bit-frames to a target
* @return Returns \c true if action was successfully performed; otherwise returns \c false.
* @return Returns received bits count on success, otherwise returns libnfc's error code
*
* This function is similar to nfc_initiator_transceive_bits() with the following differences:
* - A precise cycles counter will indicate the number of cycles between emission & reception of frames.
@ -592,7 +592,7 @@ nfc_initiator_transceive_bytes_timed (nfc_device *pnd, const uint8_t *pbtTx, con
* @warning The configuration option \a NP_HANDLE_CRC must be set to \c false.
* @warning The configuration option \a NP_HANDLE_PARITY must be set to \c true (the default value).
*/
bool
int
nfc_initiator_transceive_bits_timed (nfc_device *pnd, const uint8_t *pbtTx, const size_t szTxBits, const uint8_t *pbtTxPar,
uint8_t *pbtRx, size_t *pszRxBits, uint8_t *pbtRxPar, uint32_t *cycles)
{