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PN532_UART readers could now poll using PN532 hardware feature. This commit should fix Issue 56 too.

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This commit is contained in:
Romuald Conty 2010-04-14 13:28:24 +00:00
parent 064b7c4b41
commit b747573dc7
1 changed files with 47 additions and 12 deletions
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59
libnfc/drivers/pn532_uart.c
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@ -43,10 +43,12 @@
#define SERIAL_STRING "COM"
#define snprintf _snprintf
#define strdup _strdup
#define delay_ms( X ) Sleep( X )
#else
// unistd.h is needed for usleep() fct.
#include <unistd.h>
#define delay_ms( X ) usleep( X * 1000 )
#ifdef __APPLE__
// MacOS
// TODO: find UART connection string for PN53X device on Mac OS X
@ -229,15 +231,49 @@ bool pn532_uart_transceive(const nfc_device_spec_t nds, const byte_t* pbtTx, con
print_hex(abtRxBuf,szRxBufLen);
#endif
const byte_t pn53x_ack_frame[] = { 0x00,0x00,0xff,0x00,0xff,0x00 };
const byte_t pn53x_nack_frame[] = { 0x00,0x00,0xff,0xff,0x00,0x00 };
if(szRxBufLen >= sizeof(pn53x_ack_frame)) {
// Check if PN53x reply ACK
if(0!=memcmp(pn53x_ack_frame, abtRxBuf, sizeof(pn53x_ack_frame))) {
DBG("%s", "PN53x doesn't respond ACK frame.");
if (0==memcmp(pn53x_nack_frame, abtRxBuf, sizeof(pn53x_nack_frame))) {
ERR("%s", "PN53x reply NACK frame.");
// FIXME Handle NACK frame i.e. resend frame, PN53x doesn't received it correctly
}
return false;
}
szRxBufLen -= sizeof(pn53x_ack_frame);
if(szRxBufLen) {
memmove(abtRxBuf, abtRxBuf+sizeof(pn53x_ack_frame), szRxBufLen);
}
}
if(szRxBufLen == 0) {
// There was no more data than ACK frame, we need to wait next frame
DBG("%s", "There was no more data than ACK frame, we need to wait next frame");
while (!uart_receive((serial_port)nds,abtRxBuf,&szRxBufLen)) {
delay_ms(10);
}
}
#ifdef DEBUG
printf(" RX: ");
print_hex(abtRxBuf,szRxBufLen);
#endif
// When the answer should be ignored, just return a successful result
if(pbtRx == NULL || pszRxLen == NULL) return true;
// Only succeed when the result is at least 00 00 ff 00 ff 00 00 00 FF xx Fx Dx xx .. .. .. xx 00 (x = variable)
if(szRxBufLen < 15) return false;
// Only succeed when the result is at least 00 00 FF xx Fx Dx xx .. .. .. xx 00 (x = variable)
if(szRxBufLen < 9) return false;
// Remove the preceding and appending bytes 00 00 ff 00 ff 00 00 00 FF xx Fx .. .. .. xx 00 (x = variable)
*pszRxLen = szRxBufLen - 15;
memcpy(pbtRx, abtRxBuf+13, *pszRxLen);
*pszRxLen = szRxBufLen - 9;
memcpy(pbtRx, abtRxBuf+7, *pszRxLen);
return true;
}
@ -251,7 +287,8 @@ pn532_uart_wakeup(const nfc_device_spec_t nds)
/** PN532C106 wakeup. */
/** High Speed Unit (HSU) wake up consist to send 0x55 and wait a "long" delay for PN532 being wakeup. */
/** To be sure that PN532 is alive, we have put a "Diagnose" command to execute a "Communication Line Test" */
const byte_t pncmd_pn532c106_wakeup[] = { 0x55,0x55,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xff,0x09,0xf7,0xd4,0x00,0x00,'l','i','b','n','f','c',0xbe,0x00 };
const byte_t pncmd_pn532c106_wakeup[] = { 0x55,0x55,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xff,0x09,0xf7,0xd4,0x00,0x00,'l','i','b','n','f','c',0xbe,0x00 };
// const byte_t pncmd_pn532c106_wakeup[] = { 0x00,0x00,0xff,0x09,0xf7,0xd4,0x00,0x00,'l','i','b','n','f','c',0xbe,0x00 };
#ifdef DEBUG
printf(" TX: ");
@ -259,18 +296,16 @@ pn532_uart_wakeup(const nfc_device_spec_t nds)
#endif
uart_send((serial_port)nds, pncmd_pn532c106_wakeup, sizeof(pncmd_pn532c106_wakeup));
if (!uart_receive((serial_port)nds,abtRx,&szRxLen)) {
ERR("%s", "Unable to receive data. (RX)");
return false;
while (!uart_receive((serial_port)nds,abtRx,&szRxLen)) {
}
#ifdef DEBUG
#ifdef DEBUG
printf(" RX: ");
print_hex(abtRx,szRxLen);
#endif
#endif
const byte_t attempted_result[] = { 0x00,0x00,0xff,0x00,0xff,0x00,0x00,0x00,0xff,0x09,0xf7,0xD5,0x01,0x00,'l','i','b','n','f','c',0xbc,0x00};
if(0 != memcmp(abtRx,attempted_result,sizeof(attempted_result))) {
DBG("Comminucation test failed, result doesn't match to attempted one.");
DBG("%s", "Communication test failed, result doesn't match to attempted one.");
return false;
}
return true;