Re: [avr-gcc-list] Two interrupts one function?

[Ned Konz]

Trampas wrote:
> I have two external interrupts connected to a quadature encoder, I do 
> the same operations when either interrupt pin is changed. I was 
> wondering if it was possible to have one ISR that is called from both 
> interrupts. If so how do I do it?

Seems like this would work (jump from the second handler to the first).
Look at the definition of ISR(), EMPTY_INTERRUPT(), and _VECTOR()


/*
 avr-gcc -Os -mmcu=atmega128 -Wa,-ahlsd=twoisrs.lst -o twoisrs.elf 
twoisrs.c
 */

#include <avr/io.h>
#include <avr/interrupt.h>

// defines __vector_1
ISR(INT0_vect)
{
        // do your thing here...
}

// or use whatever interrupt number you need to:

void INT1_vect(void) __attribute__ ((signal, naked));

void INT1_vect(void)
{
    __asm__ __volatile__ ("jmp __vector_1" ::);
}

int main(void)
{
}



Thanks,
--
Ned Konz
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http://bike-nomad.com