From owner-freebsd-hackers@FreeBSD.ORG Tue Mar 15 03:30:50 2005 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 701C616A4CE for ; Tue, 15 Mar 2005 03:30:50 +0000 (GMT) Received: from cain.gsoft.com.au (cain.gsoft.com.au [203.31.81.10]) by mx1.FreeBSD.org (Postfix) with ESMTP id 3E85443D5F for ; Tue, 15 Mar 2005 03:30:49 +0000 (GMT) (envelope-from doconnor@gsoft.com.au) Received: from inchoate.gsoft.com.au (localhost [127.0.0.1]) (authenticated bits=0) by cain.gsoft.com.au (8.12.11/8.12.10) with ESMTP id j2F3Uf93057474; Tue, 15 Mar 2005 14:00:41 +1030 (CST) (envelope-from doconnor@gsoft.com.au) From: "Daniel O'Connor" To: freebsd-hackers@freebsd.org, Matt Kory Date: Tue, 15 Mar 2005 14:00:29 +1030 User-Agent: KMail/1.7.92 References: <5e52cc0005031419056fdf10c6@mail.gmail.com> In-Reply-To: <5e52cc0005031419056fdf10c6@mail.gmail.com> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart3584423.E7INMt5laK"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <200503151400.36841.doconnor@gsoft.com.au> X-Spam-Score: -5.4 () IN_REP_TO,PGP_SIGNATURE_2,QUOTED_EMAIL_TEXT,REFERENCES,SPAM_PHRASE_00_01,USER_AGENT,USER_AGENT_KMAIL X-Scanned-By: MIMEDefang 2.16 (www . roaringpenguin . com / mimedefang) Subject: Re: poll or select for ppi? X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Mar 2005 03:30:50 -0000 --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--