Use Arduino Leonardo Board instead

[cbDragon]

Hey guys, I am really appreciated with your great work about the PN532. I am a novice in Arduino field. However, I wonder if I use Arduino Leonardo to do the experiment, anything need to be changed? For example, the wire connection I found in the elechouse pdf may be different between this two development board.

[gentilkiwi]

I never used an Arduino Leonardo board before, so cannot be sure... but as boards follow Arduino connector standards:

• SPI (CLK, MOSI & MISO) are on same SPI pins (13, 11 & 12) ;
• Interrupts are on same interruptable pins (2 & 3) ;

it should work.

SPI

https://docs.arduino.cc/language-reference/en/functions/communication/SPI/

Interrupts

https://docs.arduino.cc/language-reference/en/functions/external-interrupts/attachInterrupt/

[cbDragon]

Thanks so much, I try to follow your advices.

[gentilkiwi]

In fact the documentation is wrong, SPI pins are not 10/11/12, you must take a look at the ICSP header

https://content.arduino.cc/assets/Pinout-Leonardo_latest.pdf

I sent a message on arduino/Arduino#11470

(and I confirm it works on Leonardo :))

[gentilkiwi]

It seems referenced here:

• Incorrect SPI default pins for Arduino Zero arduino/reference-en#974
• Fixed SPI pin documentation for 32U4-based boards and Zero arduino/reference-en#976

Opened since ~1 year despite a pull-request :(