I am using the NFC Shield V2.0 with and Arduino Uno R3. I followed Example 3 on the Wiki page (seeedstudio.com/wiki/NFC_Shield_V2.0) and it is working well. The example calls the function nfc.tagPresent() to reset the Irq pin. This takes about 1 second to complete (presumably that is the timeout). This means my other code cannot run during this time. Is there a faster way to reset the Irqpin?
Sorry the version is v2.1 not 2.0. I would still like to know the answer to my question though.