Ref to RFAL library (en.STSW-ST25RFAL001), What should be RF buffer size (RFAL_FEATURE_NFC_RF_BUF_LEN), in the union rfalNfcBuffer ?

[PPK]

Ref. files from the latest download of RFAL - en.STSW-ST25RFAL001 - rfal_nfc.c, rfal_nfc.h.

Devices - ST25R3911B-DISCO & M24LR16E (ISO15693 mode).

[Brian TIDAL · Accepted solution]

Hi,

if you plan to recompile the ST25R3911B-DISCO firmware, the recommended package is STSW-ST25R002.

Anyway, the various RFAL_FEATURE_*** macros are defined in the platform.h file from the X-NUCLEO-NFC5 package or from STSW-ST25R002 package. For RFAL_FEATURE_NFC_RF_BUF_LEN, this is:

#define RFAL_FEATURE_NFC_RF_BUF_LEN      258U    /*!< RF buffer length used by RFAL NFC layer                  */

rgds

BT

[PPK]

.

[PPK]

Thanks for the answer.

But unfortunately, ST25R3911B-DISCO firmware (STSW-ST25R002) , seems, does not have integrated this latest version of en.STSW-ST25RFAL001 in to.

Files - rfal_st25xv & rfal_nfc are new in this latest RFAL. And, this particular version of DISCO fw (including platform.h) does not define RFAL_FEATURE_NFC_RF_BUF_LEN, RFAL_FEATURE_NFC_DEP_PDU_MAX_LEN, RFAL_FEATURE_NFC_DEP_BLOCK_MAX_LEN ...

[Ulysses HERNIOSUS]

Hi,

can you please detail what exactly you want to achieve and which problems you encounter? Why do you want to change rfal version of ST25R3911B-DISCO?

Inside the ST25R3911B-DISCO the rfal_nfc.c/h is not used so changing RFAL_FEATURE_NFC_RF_BUF_LEN will not have any effect.

Regards, Ulysses

[Brian TIDAL]

Hi

in addition to Ulysses answer: if you need to support the M24LR16E, you can use the ST25PC-NFC application on Windows with the ST25R3911B-DISCO board.

Rgds

BT

[PPK]

Thanks Ulysses, Brian.

I am trying to use ST25R3911B-DISCO to get NDEF data reading from M24LR16E over ISO-15693. But, in my custom board, I will use STM32F091, instead of STM32L4, interfaced with ST25R3911B.

Now, when I was trying to integrate ST25R3911B-DISCO fw with STM32F091, apart from RFAL, found that I would need dispatcher, stream_dispatcher, platform, iso15693_3.

Brian said, I should be looking into rfal_st25xv. Then I found the need for latest version of RFAL - en.STSW-ST25RFAL001 & rfal_nfc.

So, now, can I avoid rfal_nfc ?

[Ulysses HERNIOSUS]

Hi,

I assume you will not use the PC communication / USB ?!

Instead of using  STSW-ST25R002 I recommend in this case basing your work on X-CUBE-NFC5 v2.0.0 which has a much cleaner code basis for embedded software development and also comes with a quite recent RFAL version.

Regards, Ulysses

[PPK]

@Brian TIDAL_O​ @Ulysses HERNIOSUS_O​ 

Thanks for the details.

I will not use the PC communication / USB for my custom board.

Got a better idea of it from the below picture of RFAL documentation.

For my case, RFAL NFC - ISO DEP - NFCV - to ST25R3911.