MFRC522 called from yield()

[MikD]

Win 10 US 64, IDE 1.8.19, MFRC522 1.4.10

I am trying to read from an RFID tag using the DumpInfo example program from the MFRC522 library after replacing Serial with SerialUSB and (F("...")) with ("..."). It works fine. However, if I try to call

mfrc522.PICC_IsNewCardPresent()

and/or

mfrc522.PICC_DumpToSerial(&(mfrc522.uid))

from yield() I lose the USB connection, and I have to double click to reload the program.

So the question is does anyone have any success with using the MFCR522 library with an Arduino Zero and calling from yield()?

[b707]

@MikD

So the question is does anyone have any success with calling from yield()?

Why do you think that you need yield() ?

[MikD]

Because then it is also called when the delay() is used etc.

[b707]

Would be better to write code without delay() ?

[MikD]

May be. the case. But I and others use delays often in Arduino. Also by using the yield() the USB handling is straight forward in a lot of Arduino Zero code found elsewhere.