From: David Woodhouse <dwmw2@infradead.org>
To: npunmia@hss.hns.com
Cc: linux-kernel@vger.kernel.org
Subject: Re: RTC !!
Date: Thu, 12 Apr 2001 22:39:29 +0100 [thread overview]
Message-ID: <19975.987111569@redhat.com> (raw)
In-Reply-To: <65256A2C.0032850D.00@sandesh.hss.hns.com>
In-Reply-To: <65256A2C.0032850D.00@sandesh.hss.hns.com>
npunmia@hss.hns.com said:
> The RTC interrupt is programmable from 2 Hz to 8192 Hz, in powers of
> 2. So the interrupts that you could get are one of the following:
> 0.122ms, .244ms, .488ms, .977ms, 1.953ms, 3.906ms, 7.813ms, and so on.
> Is there any workaround , so that i can use RTC for meeting my
> requirement of an interrupt every 1.666..ms!! ( I know that i can use
> UTIME or #define HZ 600, but i want to know if i can use RTC for this
> purpose )
You could also use the RTC for providing the system tick (You'd need to
make HZ a power of two, obviously) and then use the 8254 for providing your
600Hz interrupt.
--
dwmw2
next prev parent reply other threads:[~2001-04-12 21:40 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-04-12 9:20 RTC !! npunmia
2001-04-12 21:39 ` David Woodhouse [this message]
-- strict thread matches above, loose matches on Subject: below --
2001-04-12 12:33 Remko van der Vossen
2001-04-12 13:05 Remko van der Vossen
2001-04-20 11:18 RTC ! npunmia
2001-04-20 12:38 ` Jesper Juhl
2001-04-21 10:49 npunmia
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