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Re: [avr-gcc-list] Problem with handling interrupts
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From: |
jan |
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Subject: |
Re: [avr-gcc-list] Problem with handling interrupts |
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Date: |
Tue, 14 Jan 2014 15:15:02 +0100 |
You read the port.
On Tue, 14 Jan 2014 14:48:40 +0100
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
>