crewID/libnfc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Add ISO14443-4 chaining support for RX (MI)

Browse source
This commit is contained in:
Philippe Teuwen 2013-04-24 01:26:26 +02:00
parent b84ac324ff
commit 41ec6d49f6
1 changed files with 26 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

28
libnfc/chips/pn53x.c
View file

@ -153,6 +153,7 @@ pn53x_reset_settings(struct nfc_device *pnd)
int
pn53x_transceive(struct nfc_device *pnd, const uint8_t *pbtTx, const size_t szTx, uint8_t *pbtRx, const size_t szRxLen, int timeout)
{
bool mi = false;
int res = 0;
if (CHIP_DATA(pnd)->wb_trigged) {
if ((res = pn53x_writeback_register(pnd)) < 0) {
@ -202,7 +203,6 @@ pn53x_transceive(struct nfc_device *pnd, const uint8_t *pbtTx, const size_t szTx
CHIP_DATA(pnd)->power_mode = NORMAL; // When TgInitAsTarget reply that means an external RF have waken up the chip
}
szRx = (size_t) res;
switch (pbtTx[0]) {
case PowerDown:
case InDataExchange:
@ -219,7 +219,8 @@ pn53x_transceive(struct nfc_device *pnd, const uint8_t *pbtTx, const size_t szTx
case TgSetGeneralBytes:
case TgSetMetaData:
if (pbtRx[0] & 0x80) { abort(); } // NAD detected
if (pbtRx[0] & 0x40) { abort(); } // MI detected
// if (pbtRx[0] & 0x40) { abort(); } // MI detected
mi = pbtRx[0] & 0x40;
CHIP_DATA(pnd)->last_status_byte = pbtRx[0] & 0x3f;
break;
case Diagnose:
@ -252,6 +253,29 @@ pn53x_transceive(struct nfc_device *pnd, const uint8_t *pbtTx, const size_t szTx
CHIP_DATA(pnd)->last_status_byte = 0;
}
while (mi) {
int res2;
uint8_t abtRx2[PN53x_EXTENDED_FRAME__DATA_MAX_LEN];
// Send empty command to card
if ((res2 = CHIP_DATA(pnd)->io->send(pnd, pbtTx, 2, timeout)) < 0) {
return res2;
}
if ((res2 = CHIP_DATA(pnd)->io->receive(pnd, abtRx2, sizeof(abtRx2), timeout)) < 0) {
return res2;
}
mi = abtRx2[0] & 0x40;
if ((size_t)(res + res2 - 1) > szRx) {
CHIP_DATA(pnd)->last_status_byte = ESMALLBUF;
break;
}
memcpy(pbtRx + res, abtRx2 + 1, res2 - 1);
// Copy last status byte
pbtRx[0] = abtRx2[0];
res += res2 - 1;
}
szRx = (size_t) res;
switch (CHIP_DATA(pnd)->last_status_byte) {
case 0:
res = (int)szRx;