using 5180

[larryansell]

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.

Thanks,

Larry

[IvanRuiz]

Hello,

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?

Thank you.

Regards,

Ivan.

[larryansell]

Hi Ivan,

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,

Larry

[IvanRuiz]

Hello,

It would be helpful to refer to the examples available in the NFC Software Reader Library:

NFC Reader Library|NXP 

Regards,

Ivan.