Capturing timer value based on external interrupt , leveraging the 62.5nsec (16MHz) resolution) of the ATMEGA328 on the Arduino Uno

[johnwasser]

@jerive

  Serial.println("interrupt received, timercnts = 0x");
  Serial.println(ICR1,HEX);

You are getting the value from ICR1 but in the ISR you saved the value in dlyTime.

@jerive

TIMSK1=(1<<ICIE1)|(1<<TOIE1);

You are enabling the Timer1 Overrflow Interrupt but you didn't define an ISR for that interrupt.

I don't THINK it's a problem but I would take the 'return;' statement out of the ISR.

In your ISR you stop the counter but I don't think that will prevent the ISR from triggering again if the analog compare triggers again.