Reading NFCA_T2T (NTAG) memory. Timeout error

[Daniel Mosconi]

Hello,

I'm using ST25R3911 with my own board, and I need to read a ISO14443A/NFC-A T2T card, like NTAG213/6. I'm using the ST25R3911 DISCO FW 1.28 files.

The card is correctly detected, and I'm able to read the UID, but when I try to select the sector to read using the rfal_t2t files (rfalT2TPollerSectorSelect function) I obtain a 04 error due to timeout.

My function:

bool PollNFCA()
{
	ReturnCode err;
	rfalNfcaSensRes sensRes;
	rfalNfcaSelRes selRes;
	rfalNfcaListenDevice nfcaDevList[EXAMPLE_NFCA_DEVICES];
	uint8_t devCnt;
	uint8_t devIt;
	bool found = false;
 
	rfalNfcaPollerInitialize();		// Initialize RFAL for NFC-A
	rfalFieldOnAndStartGT(); 	// Turns the Field On and starts GT timer
	 //----------------------------------------------------------------------------
	 // Perform NFC-A Technology detection
	 err = rfalNfcaPollerTechnologyDetection( RFAL_COMPLIANCE_MODE_NFC, &sensRes ); 	// Poll for nearby NFC-A devices
	 if(err == ERR_NONE) 	// NFC-A type card found
	 {
		 err = rfalNfcaPollerFullCollisionResolution( RFAL_COMPLIANCE_MODE_NFC, 1, nfcaDevList, &devCnt);
		 if ( (err == ERR_NONE) && (devCnt > 0) )
		 {
			 found = true;
			 printf("NFC-A device(s) found %d\r\n", devCnt );
			 devIt = 0; // Use the first device on the list
			 //----------------------------------------------------------------------------
			 // Check if desired device is in Sleep
			 if( nfcaDevList[devIt].isSleep )
			 {
				 err = rfalNfcaPollerCheckPresence( RFAL_14443A_SHORTFRAME_CMD_WUPA, &sensRes ); 	// Wake up all cards
				 if( err != ERR_NONE )
				 {
					 return false;
				 }
				 err = rfalNfcaPollerSelect( nfcaDevList[devIt].nfcId1, nfcaDevList[devIt].nfcId1Len, &selRes ); 	// Select specific device
				 if( err != ERR_NONE )
				 {
					 return false;
				 }
			 }
			 printf("ISO14443A/NFC-A card found. UID: %s\r\n", hx2Str(nfcaDevList[0].nfcId1, nfcaDevList[0].nfcId1Len));
 
			 if(nfcaDevList[devIt].type == RFAL_NFCA_T2T)		// Perform protocol specific activation
			 {
 
		 		 /* NFC-A T2T device found, NFCID/UID is contained in: nfcaDev.nfcid */
		 		 /* Following communications shall be performed using:
		 		 * * - Non blocking: rfalStartTransceive() + rfalGetTransceiveState()
		 		 * * - Blocking: rfalTransceiveBlockingTx() + rfalTransceiveBlockingRx() or rfalTransceiveBlockingTxRx() */
 
				 err = rfalT2TPollerSectorSelect(4);
 
				 if( err != ERR_NONE )
				 {
					 printf(" error: %d Exit...\r\n", err);
					 return false;
				 }
			 }
		 }
	 }
	return found;
}

Thanks

[Daniel Mosconi]

Now it works.

The NTAG tags don't use the 0xC2 command (T2T sector select).