Date: Tue, 15 Mar 2005 14:00:29 +1030 From: "Daniel O'Connor" <doconnor@gsoft.com.au> To: freebsd-hackers@freebsd.org, Matt Kory <uber.caulker@gmail.com> Subject: Re: poll or select for ppi? Message-ID: <200503151400.36841.doconnor@gsoft.com.au> In-Reply-To: <5e52cc0005031419056fdf10c6@mail.gmail.com> References: <5e52cc0005031419056fdf10c6@mail.gmail.com>
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--nextPart3584423.E7INMt5laK Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Tue, 15 Mar 2005 13:35, Matt Kory wrote: > Is it possible to use poll or select to detect a change in the status > bits of the parallel port? I tried something like this, and took bits > 5 and 6 of the status register low and nothing seemed to happen. Is > what I am trying to do even possible, or I am supposed to take a > certain bit low to cause a read event? Any help is appreciated. PPI doesn't support select/poll. I don't think ere is any support for interrupt based notifications.. The on= ly=20 thing interrupts appear to be used for is for IEE1284 state changes. ie you're stuck with polling :( =2D-=20 Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C --nextPart3584423.E7INMt5laK Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (FreeBSD) iD8DBQBCNlbc5ZPcIHs/zowRAtRHAKCB5noPXuob0Kry5bg9Tc0t4sGP0ACeNEef qWPh+YYACD05yYst0VW577M= =COIr -----END PGP SIGNATURE----- --nextPart3584423.E7INMt5laK--
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