MFRC522 Library for RP2040 (Raspberry PI W)

This specific implementation was made for the Whadda WPI405 MFRC522 breakout board.

It has 8 ports. In order from left-to-right they are as following:
IRQ, NSS, SCK, MOSI, MISO, GND, RST, VCC

• NOTE: The IRQ pin is "optional" and I am not sure that it actually works, atleast I haven't made it work correctly yet.

In my implementation I have connected the pins to the PI W using the following pins:

WPI405 Pin	PI W Pin	PI W Legend
NSS	GP17	SPI0, CSn
SCK	GP18	SPI0, SCK
MOSI	GP19	SPI0, TX
MISO	GP16	SPI0, RX
GND	GND	Ground
RST	GP20	GPIO
VCC	Pin 36	3V3 Out

The src/test.c file contains a simple example for how to use the code.
It does not yet contain any write to card implementation.

test.c: Expected output on successfull read from Mifare Classic 1K like tags

ATQA      : 0400
UID       : FB 9B FF 72 
CRC: 60 16
SAK       : 08
Check Byte: ED
CRC: 8B B9
block 1: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
block 1 (str): 

Pin Connection Example