NFC中的主题 Re: NFC Ultralite

NFC Ultralite

deepanrajanbara — Wed, 28 Sep 2016 09:48:59 GMT

Hi,

We are testing NFC with Mifare UL card and the application we are using is provided by NXP .When testing Ultralite using NXP demo application we are not able to read any data or write data.But when we try to read Classic card we are able to read and write.I noticed that there is a parameter which is described in libnfc-nxp.conf i.e "MIFARE_READER_ENABLE" which is set as 0x01 for Mifare classic card.But what is the parameter to be set in order for us to read or write Ultralite card.Please Reply as soon as possible as am not getting support from anybody

Thank you,

Deepanraj.A

Re: NFC Ultralite

michaelneurohr — Wed, 28 Sep 2016 14:04:44 GMT

Hi Deepanraj,

could you describe your setup in more detail, please? What reader hardware / development are you using? What microcontroller are you using? What software package are you using exactly?

What example are you using? Inside the NFC Reader Library packages there are several examples.

Thanks,

Michael

Re: NFC Ultralite

deepanrajanbara — Wed, 28 Sep 2016 15:16:49 GMT

we are using PN1720 and our Environment is Linux.The software package we are using is linux-nfc provided by nxp R2.1.

Example is the demo app which is present in the library and the command nxp provided library. In imx6 platform and we are referring AN11697.pdf i.e PN71x0 Linux Software Stack Integration Guidelines

Thank you,

Deepanraj.A

Re: NFC Ultralite

jeremygeslin — Thu, 29 Sep 2016 07:35:26 GMT

Hi Deepanraj,

To send command to a MIFARE UL you can use nfcTag_transceive API of the library to send "raw" command to a card.

Please find attached an update of the demoapp delivered as part of the linux_libnfc-nci library demonstrating a "READ" command on MIFARE UL card when it is not NDEF compliant (see about line 1385).

Regards,

Jeremy Geslin.

Re: NFC Ultralite

deepanrajanbara — Thu, 29 Sep 2016 07:52:00 GMT

Hi,

The changes you have done in the demo app.if it is applied is it possible to read and write data to ultralight card.

Thank you,

Deepanraj.A

Re: NFC Ultralite

jeremygeslin — Thu, 29 Sep 2016 07:57:23 GMT

Hi,

The changes done to the demo app are only showing how to read a MIFARE UL sector. For writing you can use exact same API to send command such "WRITE", in this case the buffer to be send should looks like {0xA2, block address, 4 bytes of data to write} (e.g. {0xA2, 0x04, 0x11, 0x22, 0x22, 0x44} will write block 4 with data 11223344).

Regards,

Jeremy.

Re: NFC Ultralite

deepanrajanbara — Thu, 29 Sep 2016 08:14:21 GMT

Hi ,

I will test with this and let you know if there is any problem

Thank you,

Deepanraj.A

Re: NFC Ultralite

deepanrajanbara — Thu, 29 Sep 2016 09:21:23 GMT

Hi,

For writing you have mentioned the buffer did you mean MifareAuthCmd in the demo app or is it any other buffer you are mentioning and is there any thing need to be set in libnfc-nxp.conf i.e the value of MIFARE_READER_ENABLE for reading Ultralight.

Thank you,

Deepanraj.A

Re: NFC Ultralite

jeremygeslin — Thu, 29 Sep 2016 09:30:54 GMT

Just create you own buffer and use it for instance:

unsigned char MifareWriteCmd[] = {0xA2, 0x04, 0x11, 0x22, 0x22, 0x44};
unsigned char RespBuf[255];
nfcTag_transceive(TagInfo.handle, MifareWriteCmd, sizeof(MifareWriteCmd), RespBuf, sizeof(RespBuf), 500);

Re: NFC Ultralite

deepanrajanbara — Thu, 29 Sep 2016 10:25:57 GMT

Hi ,

Is there any way to test the demo app for writing in Ultralight as

nfcDemoApp write --type=Text -l en -r "Test"

without hardcodeing the value in buffer i.e MifareWriteCmd[] = {0xA2, 0x04, 0x11, 0x22, 0x22, 0x44};

Thank you,

Deepanraj.A

Re: NFC Ultralite

deepanrajanbara — Thu, 29 Sep 2016 12:49:13 GMT

Hi,

Is it possible to format my card to NDEF format using this demo app ?

or,

Is there any other application available to format NFC cards in Linux

Thank you,

Deepanraj.A

Re: NFC Ultralite

jeremygeslin — Thu, 29 Sep 2016 12:58:06 GMT

Indeed,

nfcDemoApp write --type=Text -l en -r "Test"

will write data (the related NDEF message) into the MIFARE UL tag.

Re: NFC Ultralite

jeremygeslin — Thu, 29 Sep 2016 12:59:08 GMT

nfcDemoApp "write" option actually format the tag if is is not yet NDEF and if NDEF formatting is supported.

Re: NFC Ultralite

deepanrajanbara — Thu, 29 Sep 2016 13:03:58 GMT

But When we give "write" command still it is telling NDEF content as NO . Is there a way to write NDEF content to my classic or Ultralite card ?

Re: NFC Ultralite

jeremygeslin — Thu, 29 Sep 2016 13:10:28 GMT

nfcDemoApp "write" option should, unless your card doesn't support formatting.

To verify this, please enable more traces (in /etc/libnfc-nxp.conf file, update NXPLOG_NCIX_LOGLEVEL and NXPLOG_NCIR_LOGLEVEL to value 0x03) and provide related logs.

Re: NFC Ultralite

deepanrajanbara — Thu, 29 Sep 2016 13:34:18 GMT

Please refer the log which i have attached when i give the "write" command with the log status in ".conf" file set to 0X03

Re: NFC Ultralite

jeremygeslin — Thu, 29 Sep 2016 13:50:31 GMT

Indeed the existing nfcDemoApp doesn't perform write operation whenever the tag is not already NDEF formatted.

Please find update attached.

Re: NFC Ultralite

deepanrajanbara — Thu, 29 Sep 2016 14:05:01 GMT

Hi,

I just updated the code which you have provided but this too seemed to fail when it is writing.

please find the attached log file for further details

Re: NFC Ultralite

jeremygeslin — Thu, 29 Sep 2016 15:14:44 GMT

There is a bug in the Linux_libnfc-nci stack related to this specific case.

Please apply attached patch.

Re: NFC Ultralite

deepanrajanbara — Fri, 30 Sep 2016 05:11:25 GMT

After applying the patch which you have provided we face the same issue.Here is the log attached