pn5180 mifare authentication key timeout

[qmzn2333]

Hi, I am using PN5180 to read ISO14443 card, so far I have successfully read the 4-byte UID and SAK, but the following authentication keeps returning error code 2, what is the reason?

[estephania_mart · Accepted solution]

Hello, 

By any chance are you using a MIFARE classic ? If that is the case, could you please help me checking the example  NfcrdlibEx4_MIFAREClassic in the NXP NFC Reader Library.

Regards,

Estephania

[qmzn2333]

Using NXP library can correctly pass the authentication, but it is too big to be transplanted to my MCU, so Now I am writing the driver code by myself. I have successfully obtained SAK, but the authentication is not passed. I can't find the problem by comparing with NXP library