Re: New driver for Amplicon PCI272 and PC272E

On Tuesday 08 February 2005 06:23 am, Ian Abbott wrote:
>
> Could you clarify the restrictions on tasklets in an RT environment?  In
> my driver, the interrupt source handler callbacks are called from the
> hardware interrupt handler, not the tasklet.  If it's an RT interrupt,
> the channel data would be read or written within a guaranteed period
> after the 'scan' trigger.  The tasklet is just there for cleaning up
> freed handlers.  I could clean things up without the tasklet, but it

Oh, my mistake.

>
> I'll investigate having a separate subdevice to handle interrupt
> triggers.  I'm thinking of a using a 6-channel subdevice with a
> "virtual" external trigger that fires when any of the channels on the
> channel list fire.  The read value would indicate which trigger(s) have
> fired.  This sort of thing would be much less intuitive to use than the

I would like to improve the scheme for supporting externally triggered 
interrupts in general, but it's not clear to me how yet.

-- 
Frank