Hi there,
we are having problems reading ISO 15693 Tags with the PN7120 in Android:
First, reading works as expected, but after a few times the reader stops and won't read any tags anymore. The last message read from the PN7120 is always this:
05-25 11:06:44.519 345 1576 D NxpTml : PN54X - I2C Read successful.....
05-25 11:06:44.519 345 1576 D NxpNciR : len = 4 > 00000102
05-25 11:06:44.519 345 1576 D NxpTml : PN54X - Posting read message.....
05-25 11:06:44.519 345 1579 D NxpHal : read successful status = 0x0
05-25 11:06:44.520 1330 1538 I libnfc_nci: [INFO:gki_buffer.cc(307)] GKI_getbuf 0xb400006fdf3194a0 30:33
05-25 11:06:44.520 1330 1566 I libnfc_nci: [INFO:nfc_ncif.cc(420)] NFC received data
05-25 11:06:44.520 1330 1566 I libnfc_nci: [INFO:nfc_ncif.cc(1918)] nfc_ncif_proc_data 0x000001
05-25 11:06:44.520 1330 1566 I libnfc_nci: [INFO:nfc_ncif.cc(1923)] nfc_ncif_proc_data len:1
05-25 11:06:44.521 1330 1566 I libnfc_nci: [INFO:rw_i93.cc(3256)] rw_i93_data_cback - event = 0x6003
05-25 11:06:44.521 1330 1566 I libnfc_nci: [INFO:rw_i93.cc(3321)] rw_i93_data_cback - RW I93 state: <BUSY (2)>
A reset of the PN7120 (via Android NFC-Service) fixes the problem until it arises again.
So from the libnfc_nci code it seems that the PN7120 sends an I93_FLAG_ERROR_DETECTED without any error code and won't read afterwards.
Is there any possibility to further debug this issue. E.g. an NCI message to read out the state / some error information from the PN7120?
I also attached a log of the last reads with debugging enabled.
