On 3/29/07, Sandeep Sanjay Patil <psandeep.s@xxxxxxxxx> wrote:
On Thu, 2007-03-29 at 13:59 +0200, Ahmed S. Darwish wrote:
Well,
since the interrupts are being discussed, ia had a question bugging me
since a long time. Sometimes we have two types of interrupts...
1. Level IRQ
2. Edge trigerred IRQ
difference? AFAIK, level irq's will appear when the clock is LEVEL (now
is it the cpu clock??) And the edge triggered irq's will appear on
falling or rising edge as configured in the interrupting device. My
question was, is it the cpu clock, or the interrupting device clock
being reffered here.
so, if i have an edge triggered interrupt and my ISR looks like..
irqreturn_t my_device_isr(int irqno, void *dev_id)
{
return IRQ_HANDLED;
}
will this do???
I dont want to do this at some place, the question is just out of
curiosity.
cheers,
sandeep
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Just a guess:
Interrupts are asynchronous with the cpu clock thats why they are
called interrupts
otherwise they would be called exceptions (which are synchronous to
the cpu clock on which they occur e.g devide by zero etc). So I tnink
it must in reference to the interrupting devices clock. Please CMIIW.
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Regards,
Sandeep.
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