PN5180 NFC goes into a mode where all register reads return all FFs. Two questions - how can I tell what in particular what I did that puts the chip into that mode, and is there any way to recover from it? I see this happen on a second register read.
Could you please provide us with more information such as screen captures, Software Library Information, Host MCU...
Which register(s) are you specifically accessing to?
Thanks for your reply. This turned out to be that I mistakenly had left another register read after the one where it seemed to be causing the lockup of all FFs. Now that is fixed.
However I do have another question please. I am trying to read and write a data card. Is it sufficient to have my code
1. Load a protocol
1. RF ON to energize the RF field
1. Load 3 into the SYSTEM CONFIG low bits 2:0 to start the transceive state machine
1. when I want to READ_DATA , no data has been received from the card,
Do I need to do anything else to start the reading? Similarly, do I need to do anything additional to get SEND_DATA to write data to the card?
Thanks for any help you can provide,