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12F675 Interrupt problem

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PCM programmer

Joined: 06 Sep 2003
Posts: 21708

Posted: Fri Oct 25, 2013 10:29 pm

Quote:

ext_int_edge(H_TO_L);
enable_interrupts(INT_RA3);

The H_TO_L condition appear that it does not work and every button push work as it was 2 actions.

The ext_int_edge() function doesn't work with INT_RA. It only works with #int_ext.

How to detect only the falling edge:
You can read the input pin inside the #int_ra routine, and if it's at a low
level, then you have detected the falling edge. Then perform your action.
Don't do anything if you read the signal as a high level, because it means
the interrupt was caused by the rising edge (L to H).

Abid

Joined: 25 Oct 2013
Posts: 3


Posted: Sat Oct 26, 2013 2:31 am

Thank PCM programmer !!

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