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detecting edge in falling/rising mode interrupt

Question asked by jamali.fatemeh on Jul 23, 2014
I want to config external interrupt line 0 in both falling/rising edge mode. But I don't know how I can detect that event happen due to falling edge or rising edge. It should do different function for falling and rising edge.
 I can't use two external interrupt pin and connect them to find every rising or falling edge.

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