Re: [avr-gcc-list] external interrupt sample code

[Ian Caddy]

Hi David,

Here is a snipit of code from our system where we use INT0:

  /* Now lastly we enable the HINT interrupt on INT0, on falling edge */
  outp(BV(ISC01) , EICRA);
  outp(BV(INT0) , EIMSK);

That is all that is required to enable INT0 on the falling edge.  Then 
you just need to have an interrupt service routine:

SIGNAL(SIG_INTERRUPT0)
{
 blah
}

And everything should work from there.

Hope this helps,

Ian Caddy


David Morrison wrote:

> Hi all,
> I am trying to use the external interrupt0 on the ATMega128 and am running into 
> problems, does anyone have a simple program that demonstrates how to set up the 
> pin as an external interrupt?
>  
> Thanks,
> dave
>
>
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