Re: Re[2]: COMEDU CMD interface ideology and implementation (PCI1751 related)?

On Monday 27 August 2007 02:09, Askar Ibragimov wrote:
> Thank you Frank,
>
> though, I need asyncronous read of the counters, as I need to know,
> how many counts happened per second.

Take the difference between successive reads.

> I guess I figured out a solution: I will write an interrupt handler
> and make it called from system timer (init_timer, etc.) similar to the
> driver of comedi_test. This routine will read the counters and pass
> their data to a buffer. I do not need hard realtime here so the
> precision of the computer clock is enough. What do you think about
> this schema?

If the hardware doesn't support timed acquisition, don't implement some 
lame software timed pseudo-command.  If you want that, use 
comedi_rt_timer.  But I don't see any reason you need either.

-- 
Frank