One way would be to increase your interrupt rate to once every 50 milliseconds. In your ISR, check for PORTB.0 to be low and increment a counter. If the counter reaches 200, before PORTB.0 goes low, then the button hasn't been pushed for 10 seconds.
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One way would be to increase your interrupt rate to once every 50 milliseconds. In your ISR, check for PORTB.0 to be low and increment a counter. If the counter reaches 200, before PORTB.0 goes low, then the button hasn't been pushed for 10 seconds.
Charles Linquist
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