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2 years, 9 months ago. This question has been closed. Reason: Duplicate question
Using non-mbed pin for InterruptIn hangs custom board
I have built a custom board that uses many additional pins than those available on the mbed NXP LPC1768 prototyping board. This has been successful with one exception, the pin assigned to generate an interrupt on the rising edge of the input signal.
So, using mbed pin P18 (P0_26) works but using the pin P1_22 does not, the system hangs.
I have commenced investigations but would appreciate if anyone can give me a quick explanation to save time, for instance is it that only mbed pins can be used for interrupts?