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pn53x: allow more delay for Card Presence command (tested on PN533 and PN532 in various contexts).

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This commit is contained in:
Romuald Conty 2012-06-12 16:51:47 +00:00
parent ab312299d6
commit 9f38ae715d
1 changed files with 4 additions and 1 deletions
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5
libnfc/chips/pn53x.c
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@ -1681,7 +1681,10 @@ pn53x_initiator_target_is_present(struct nfc_device *pnd, const nfc_target nt)
uint8_t abtRx[1];
int res = 0;
if ((res = pn53x_transceive(pnd, abtCmd, sizeof(abtCmd), abtRx, sizeof(abtRx), -1)) < 0)
// Card Presence command can take more time than default one: when a card is
// removed from the field, the PN53x took few hundred ms more to reply
// correctly. (ie. 700 ms should be enough to detect all tested cases)
if ((res = pn53x_transceive(pnd, abtCmd, sizeof(abtCmd), abtRx, sizeof(abtRx), 700)) < 0)
return res;
if (res == 1) {
return NFC_SUCCESS;