Well, with some really lateral thinking, you could set the 16U2 up as a timebase at say, 10 Hz, sending that reference into pin 0 of the 328 and let the 328 do the counting.
Well, with some really lateral thinking, you could set the 16U2 up as a timebase at say, 10 Hz, sending that reference into pin 0 of the 328 and let the 328 do the counting.