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 <d...@dfx.it> 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 > > > > --- > Questa e-mail è priva di virus e malware perché è attiva la protezione > avast! Antivirus. > http://www.avast.com > > _______________________________________________ > AVR-GCC-list mailing list > AVR-GCC-list@nongnu.org > https://lists.nongnu.org/mailman/listinfo/avr-gcc-list > >
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