Hi,
I am trying to use nfc_t4t_lib and I have some issues because processing incoming data takes some time (around 100 ms) and therefore sending the response occurs late after receiving the command.
There is a similar post but in my case, I am not using BLE at the same time, thus it is not exactly the same: devzone.nordicsemi.com/.../nfc-t4t-response-timing-sdk-15-3
If I have a delay (> 4 ms) after NFC_T4T_EVENT_DATA_IND,
- nfc_t4t_response_pdu_send() returns success
- But reader receives 6E00 status word, although this is absolutely not the data I have sent with nfc_t4t_response_pdu_send()
- Moreover in the log, I observe the following error:
<err> nfc_platform: Tried to read data pointer: 4 bytes, read 0.
<err> nfc_platform: Reading nfc ring buffer failed, resetting ring buffer.
I was expecting the NFC T4T lib would send WTX to the reader until I call nfc_t4t_response_pdu_send() but it seems this is not the case. Am I missing something ?
Moreover, I was wondering: why NFC T4T library source code is not available ? Would it be possible to have access to it ?
Thanks and best regards,
Jean