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nfc-sam: better connection management.

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This commit is contained in:
Emanuele Bertoldi 2010-06-16 11:21:27 +00:00
parent d593a8e4c9
commit b2089e8bb0
1 changed files with 62 additions and 35 deletions
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95
examples/nfc-sam.c
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@ -28,6 +28,7 @@
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <time.h>
#include <nfc/nfc.h> #include <nfc/nfc.h>
#include <nfc/nfc-messages.h> #include <nfc/nfc-messages.h>
@ -35,20 +36,49 @@
#define MAX_FRAME_LEN 264 #define MAX_FRAME_LEN 264
#define NORMAL_MODE 1
#define VIRTUAL_CARD_MODE 2 #define VIRTUAL_CARD_MODE 2
#define WIRED_CARD_MODE 3 #define WIRED_CARD_MODE 3
#define DUAL_CARD_MODE 4 #define DUAL_CARD_MODE 4
int main(int argc, const char* argv[]) #define TCL 1
#define MIFARE 2
bool sam_connection(nfc_device_t* pnd, int mode)
{ {
nfc_device_t* pnd; byte_t pncmd_sam_config[] = { 0xD4,0x14,0x00,0x00 };
byte_t abtRx[MAX_FRAME_LEN]; byte_t abtRx[MAX_FRAME_LEN];
size_t szRxLen; size_t szRxLen;
byte_t abtSAMConfig[] = { 0xD4,0x14,0x00,0x00 }; // Only the VIRTUAL_CARD_MODE requires 4 bytes.
int size = sizeof(pncmd_sam_config)-((mode == VIRTUAL_CARD_MODE) ? 0 : 1);
pncmd_sam_config[2] = mode;
nfc_target_info_t nti; return pnd->pdc->transceive(pnd->nds,pncmd_sam_config,size,abtRx,&szRxLen);
}
void wait_one_minute()
{
int secs = 0;
printf("|");
fflush(stdout);
while (secs < 60)
{
sleep(1);
secs += 1;
printf(".");
fflush(stdout);
}
printf("|\n");
}
int main(int argc, const char* argv[])
{
nfc_device_t* pnd;
// Display libnfc version // Display libnfc version
const char* acLibnfcVersion = nfc_version(); const char* acLibnfcVersion = nfc_version();
@ -58,71 +88,68 @@ int main(int argc, const char* argv[])
pnd = nfc_connect(NULL); pnd = nfc_connect(NULL);
if (pnd == NULL) { if (pnd == NULL) {
printf("Unable to connect to NFC device."); ERR("%s", "Unable to connect to NFC device.");
return EXIT_FAILURE; return EXIT_FAILURE;
} }
// Set connected NFC device to initiator mode
nfc_initiator_init(pnd);
// Drop the field for a while
nfc_configure(pnd,NDO_ACTIVATE_FIELD,false);
// Configure the CRC and Parity settings
nfc_configure(pnd,NDO_HANDLE_CRC,false);
nfc_configure(pnd,NDO_HANDLE_PARITY,true);
// Enable field so more power consuming cards can power themselves up
nfc_configure(pnd,NDO_ACTIVATE_FIELD,true);
printf("Connected to NFC reader: %s\n",pnd->acName); printf("Connected to NFC reader: %s\n",pnd->acName);
// Print the example's menu. // Print the example's menu
printf("\nSelect the comunication mode:\n"); printf("\nSelect the comunication mode:\n");
printf("[1] Virtual card mode.\n"); printf("[1] Virtual card mode.\n");
printf("[2] Wired card mode.\n"); printf("[2] Wired card mode.\n");
printf("[3] Dual card mode.\n"); printf("[3] Dual card mode.\n");
printf(">> "); printf(">> ");
// Take user's choice. // Take user's choice
char input = getchar(); char input = getchar();
int mode = input-'0'+1; int mode = input-'0'+1;
printf("\n"); printf("\n");
if (mode <= 1 || mode >= 5) if (mode < VIRTUAL_CARD_MODE || mode > DUAL_CARD_MODE)
return EXIT_FAILURE; return EXIT_FAILURE;
abtSAMConfig[2] = mode; // Connect with the SAM
sam_connection(pnd, mode);
// Connect with the SAM.
pnd->pdc->transceive(pnd->nds,abtSAMConfig,sizeof(abtSAMConfig),abtRx,&szRxLen);
switch (mode) switch (mode)
{ {
case VIRTUAL_CARD_MODE: case VIRTUAL_CARD_MODE:
{ {
printf("Now the SAM is readable from an external reader.\n"); printf("Now the SAM is readable for 1 minute from an external reader.\n");
// TODO. wait_one_minute();
} }
break; break;
case WIRED_CARD_MODE: case WIRED_CARD_MODE:
{ {
// Read the SAM's info. nfc_target_info_t nti;
if (nfc_initiator_select_tag(pnd,NM_ISO14443A_106,NULL,0,&nti))
{ // Read the SAM's info
printf("The following (NFC) ISO14443A tag was found:\n\n"); if (!nfc_initiator_select_tag(pnd,NM_ISO14443A_106,NULL,0,&nti))
print_nfc_iso14443a_info (nti.nai); return EXIT_FAILURE;
}
printf("The following (NFC) ISO14443A tag was found:\n\n");
print_nfc_iso14443a_info (nti.nai);
} }
break; break;
case DUAL_CARD_MODE: case DUAL_CARD_MODE:
{ {
// TODO. byte_t abtRx[MAX_FRAME_LEN];
size_t szRxLen;
if (!nfc_target_init(pnd,abtRx,&szRxLen))
return EXIT_FAILURE;
printf("Now both the NFC reader and SAM are readable for 1 minute from an external reader.\n");
wait_one_minute();
} }
break; break;
} }
// Disconnect from the SAM.
sam_connection(pnd, NORMAL_MODE);
// Disconnect from NFC device // Disconnect from NFC device
nfc_disconnect(pnd); nfc_disconnect(pnd);