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pn532_uart: fix pn532 wakeup response handling

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This commit is contained in:
Romuald Conty 2011-02-15 18:08:35 +00:00
parent 695dc75037
commit 2ad6591f31
1 changed files with 21 additions and 0 deletions
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21
libnfc/drivers/pn532_uart.c
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@ -284,6 +284,24 @@ pn532_uart_ack (const nfc_device_spec_t nds)
uart_send ((serial_port) nds, ack_frame, sizeof (ack_frame));
}
bool
pn532_uart_wait_for_ack(const nfc_device_spec_t nds)
{
byte_t abtRx[RX_BUFFER_LEN];
size_t szRx = sizeof(ack_frame);
if (0 == uart_receive ((serial_port) nds, abtRx, &szRx)) {
#ifdef DEBUG
PRINT_HEX ("RX", abtRx, szRx);
#endif
} else {
ERR ("No ACK.");
return false;
}
if (0 != memcmp (ack_frame, abtRx, szRx))
return false;
return true;
}
#define PN53X_RX_OVERHEAD 6
void
pn532_uart_wakeup (const nfc_device_spec_t nds)
@ -301,6 +319,9 @@ pn532_uart_wakeup (const nfc_device_spec_t nds)
PRINT_HEX ("TX", pncmd_pn532c106_wakeup_preamble, sizeof (pncmd_pn532c106_wakeup_preamble));
#endif
uart_send ((serial_port) nds, pncmd_pn532c106_wakeup_preamble, sizeof (pncmd_pn532c106_wakeup_preamble));
pn532_uart_wait_for_ack(nds);
if (0 == uart_receive ((serial_port) nds, abtRx, &szRx)) {
#ifdef DEBUG
PRINT_HEX ("RX", abtRx, szRx);