Can two diffrent drivers (ex. devc-ser8250 and network driver speedo )
share the same interrupt?
Any comments with interrupt sharring welcome.
Thank you,
Janusz.
Janusz <ruszelj@baxter.com> wrote:
Can two diffrent drivers (ex. devc-ser8250 and network driver speedo )
share the same interrupt?Any comments with interrupt sharring welcome.
Thank you,
Janusz.
Take a look at “Writing an Interrupt Handler” in the Programmer’s Guide.
Barry
Janusz <ruszelj@baxter.com> wrote:
Can two diffrent drivers (ex. devc-ser8250 and network driver speedo )
share the same interrupt?Any comments with interrupt sharring welcome.
There are hardware issues – is the interrupt line in question
level-triggered or edge-triggered? If edge-triggered, then you
can’t safely share interrupts – you may (will) get into a state
where you will never get an interrupt again.
-David
QNX Training Services
I do not answer technical questions by email.
Thank you David!
Janusz.
“David Gibbs” <dagibbs@qnx.com> wrote in message
news:9qpt7e$rfc$1@nntp.qnx.com…
Janusz <ruszelj@baxter.com> wrote:
Can two diffrent drivers (ex. devc-ser8250 and network driver speedo )
share the same interrupt?Any comments with interrupt sharring welcome.
There are hardware issues – is the interrupt line in question
level-triggered or edge-triggered? If edge-triggered, then you
can’t safely share interrupts – you may (will) get into a state
where you will never get an interrupt again.
-David
QNX Training Services
I do not answer technical questions by email.
Janusz wrote:
Can two diffrent drivers (ex. devc-ser8250 and network driver speedo )
share the same interrupt?
If both devices are PCI bus devices … yes, they can share the same
interrupt. If your devices are hooking on the ISA bus … I would
say they can’t in geberal share interrupts.
The PC/104 bus (similarISA bus) has the possibility to pull up some IRQ
line … that allows to share level triggered interrupts (it’s an
exception …)
Armin
Any comments with interrupt sharring welcome.
Thank you,
Janusz.