SDK13 nfc_t2t_payload_raw_set() not work properly.

[Valer_I]

Hello, I use SDK example nfc_text_record for pca10040 DK. With aim to check memory area of the emulated tag I've modified example with next:

 /* Set up NFC */
    err_code = nfc_t2t_setup(nfc_callback, NULL);
    APP_ERROR_CHECK(err_code);

	static const uint8_t key[16]={0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f,0x10};
	err_code = nfc_t2t_payload_raw_set( key, 16);
    APP_ERROR_CHECK(err_code);

    /* Start sensing NFC field */
    err_code = nfc_t2t_emulation_start();
    APP_ERROR_CHECK(err_code);

    while (1)
    {
        __WFE();
    }

After reading with cardreader:

Pages:

04     00 00 00 00     90 00
05     05 06 07 08     90 00
06     09 0a 0b 0c     90 00
07     0d 0e 0f 10     90 00

so the question is why nfc_t2t_payload_raw_set() skip writing page 4 while perform writing of pages 5-7?

[FormerMember]

Could you try to use nfc_t2t_payload_set(..) instead of nfc_t2t_payload_raw_set(..) and check if that it gives a different result?

[Valer_I]

Hi, Kristin The nfc_t2t_payload_set() adds NDEF TLV 03 10 in first 2 bytes so it is:

04 - 03 10 01 02
05 - 03 04 05 06
06 - 07 08 09 0a
07 - 0b 0c 0d 0e
08 - 0f 10 00 00

in description to a function stated : "..The required NDEF TLV will be created implicitly by NFC T2T Library.." so it's work. I need nfc_t2t_payload_raw_set() because it write raw data without TLV.