From owner-freebsd-hackers@FreeBSD.ORG  Mon Dec 27 16:24:00 2004
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Date: Mon, 27 Dec 2004 09:22:16 -0700 (MST)
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To: nkoch@gmx.com, freebsd-hackers@freebsd.org
From: "M. Warner Losh" <imp@bsdimp.com>
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Subject: Re: parameters for tsleep(9)
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In message: <41CF297E.60505@cronyx.ru>
            Roman Kurakin <rik@cronyx.ru> writes:
: >I am just writing a device driver for the i82527 (can-bus) chip.
: >For testing I need the driver to poll the chip instead of running
: >in interrupt mode.

There's a canbus implementation in the pc98 specific part of FreeBSD.
Maybe that will be useful to you.

Warner