Hi All,

I am pleased to announce that the external interrupt routine is now working properly. Thank you to all who have helped me resolve my problems - much appreciated

To aid in my PCB layout I would like to move my ADC channels to AN1 and AN2. This will mean that I need to alter the type of interrupt from an external interrupt on GP2 to a Change on Interrupt on GP4. To do this I have changed the Interrupt Handler in DT_INST-14 from INT_INT to GPC_INT, Enable GPC_INT and enabled bit 4 of the Interrupt-On-Change GPIO Register (ie IOC.4=1). My interrupt switch is set up with a 10k pull-up resistor from GP4 to +5V and a momentary action switch from GP4 to 0V. The code compiles without error but the change on interrupt function does not work in "the real world".

I would have thought this was a pretty straight forward change but I am obviously missing something important. Would someone please direct me to where I have gone wrong?

Cheers
Barry