Re: [avr-gcc-list] 2 interrupt sharing the same ISR

[David Kelly]

On Jan 14, 2005, at 4:21 PM, gouy yann wrote:

> I'd like to know if someone has an easy trick to make
> 2 interrupts ( timer overflow and timer output compare
> ) jump to the same address (ISR).

So how would you know which event launched the service routine?

The AVR is unique among MCUs I have used in that the IRQ flag is 
automatically cleared by the MCU when the service vector is loaded. On 
other CPUs if one is clumsy and doesn't clear the flag then the RTI 
infinite loops right back to your service routine and one never gets 
out of IRQ space back to user space.

--
David Kelly N4HHE, address@hidden
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Whom computers would destroy, they must first drive mad.