Program Do Not Exit From the ISR (Interrupt)

Hi everyone

I am using Arduino due, and I exploit the rising edge interrupt on a PIO pin to capture an external interrupt.

I tried two ways to implement it:

1- The simple code suggested in Arduino reference, with attachInterrupt function

2- I use the rising edge interrupt on TIOB8 (Interrupt on timer input pins)

In both, when the program enters the ISR for the first time, it does not exit from it.

I use LEDs to check whether the program exits form the ISR not. In other words, there is a LED that blinks in an infinite loop, and when the interrupt enabled, it stops blinking.

Please help me to solve my problem.

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