Re: Problem with handling interrupts

You read the port.

On Tue, 14 Jan 2014 14:48:40 +0100
dfx <[email protected]> wrote:

> Hello,
> 
> my problem is the following:
> 
> suppose we have 8 keys all connected to the same port (for. eg. D) of
> an AVR processor (eg. ATmega324) and that all pins have the interrupt
> enabled.
> 
> If I understand correctly, when I press any key is called the same
> ISR (PCINT3_vect) and a single flag is set (PCIE3).
> 
> Question: How do I know which button was actually pressed?
> 
> thank you very much
>