Problems with P2P connection (st25r3911b-disco)

[T_Schauer]

Hello everyone,
I'm trying to establish a stable p2p connection between two st25r3911b disco boards. I'm still figuring things out and using the demo code as a reference to get it working.
I get one communication, but after that I break out of my while loop.
ReturnCode11 -> protocol error.

Kind regards
T_shower

void P2Pcommunication( rfalNfcDevice *nfcDev )
{
#if RFAL_FEATURE_NFC_DEP

    uint16_t   *rxLen;
    uint8_t    *rxData;
    ReturnCode err;

    if( nfcDev->type == RFAL_NFC_POLL_TYPE_AP2P )
    {
    	TransceiveBlocking( NULL, 0, &rxData, &rxLen, RFAL_FWT_NONE);
    }

    while(err == ERR_NONE)
    {
    	snprintf((char*)message,sizeof(message),message_stringsh);
        err = TransceiveBlocking( message, strlen(message), &rxData, &rxLen, RFAL_FWT_NONE);
        if( err != ERR_NONE )
        {
            break;
        }

        CDC_Transmit_FS(*rxData, sizeof(rxData) );
    }
#endif /* RFAL_FEATURE_NFC_DEP */
}

[Ulysses HERNIOSUS · Accepted solution]

Hi,

not completely following how you perform this. Is this PC-Based using APIs of the firmware or is this directly in the firmware on STM32L4?

We do have a working example inside our STSW-ST25R-LIB: ap2p_proprietary which demonstrates based on firmware to exchange some data between two 3911,3916,3916B and derivates.

BR, Ulysses