Re: [avr-gcc-list] Problem with handling interrupts

[Francois Lorrain]

Hello,

In the interrupt routine, just read the PIND register and look at which one changed ...

Regards

Francois

On Tue, Jan 14, 2014 at 2:48 PM, dfx <address@hidden> 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

--
Domenico Formenton
Tel. 06 92731757
Fax. 178 2250847
Cell. 333 7075929



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