From owner-freebsd-hardware Fri May 10 14:15:43 2002 Delivered-To: freebsd-hardware@freebsd.org Received: from omega.focalnetworks.net (omega.focalnetworks.net [209.135.104.33]) by hub.freebsd.org (Postfix) with SMTP id 848F437B408 for ; Fri, 10 May 2002 14:15:32 -0700 (PDT) Received: (qmail 42903 invoked by uid 1030); 10 May 2002 21:15:31 -0000 Date: Fri, 10 May 2002 17:15:31 -0400 (EDT) From: Jai Dhar To: John Utz Cc: Subject: Re: Parallel port writing In-Reply-To: Message-ID: <20020510171451.W42862-100000@omega.focalnetworks.net> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hardware@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org I'm in the process of learning a lot of C's IO commands, so could you tell me how I would use that? (I'm more into circuits, haven't really explored the interfacing part until now, heh) Thanx On Fri, 10 May 2002, John Utz wrote: > ok, one more suggestion. > > the code fragment isnt sufficient i think. doesnt it need an open() on the > device? > > On Fri, 10 May 2002, Jai Dhar wrote: > > > > > /dev/ppi0 -> /dev/ppi2 does exist :p > > For those who are reading, I'm testing via a simple Led circuit.. led > > connected to data pin one and grounded via ground pins. I'm also using the > > code snippet used in 'man ppi'. > > > > On Fri, 10 May 2002, John Utz wrote: > > > > > how about the device in the dev dir? > > > > > > ls /dev/ppi doesnt exist on my box, and i am unsure as to how to create > > > it. > > > > > > that's my last idea, best 'o luck! > > > > > > > > > On Fri, 10 May 2002, Jai Dhar wrote: > > > > > > > > > > > device ppc0 at isa? irq 7 > > > > device ppbus > > > > device lpt > > > > device ppi > > > > > > > > All there > > > > > > > > On Fri, 10 May 2002, John Utz wrote: > > > > > > > > > do you have the device in the kernel? i've never gave it any thought, but > > > > > wouldnt you need device ppi built in? > > > > > > > > > > i dont know, i am just guessing.... > > > > > > > > > > On Fri, 10 May 2002, Jai Dhar wrote: > > > > > > > > > > > I am root, lpd isn't running, and as for ppi.. I tried their exact code > > > > > > that they have in 'man ppi', and still doesn't work??? > > > > > > > > > > > > > > > > > > On Fri, 10 May 2002, John Utz wrote: > > > > > > > > > > > > > you arent root? > > > > > > > > > > > > > > or, more likely, lpd owns it! > > > > > > > > > > > > > > On Fri, 10 May 2002, Jai Dhar wrote: > > > > > > > > > > > > > > > I have a question about writing to parallel ports. > > > > > > > > I am trying to make a basic C program to write simple data to a parallel > > > > > > > > port, but when I try, I get an error on opening /dev/lpt0 as "Device Busy" > > > > > > > > I tried echo 255 > /dev/lpt0, and also got "Device Busy". When looking at > > > > > > > > all my processes, I didn't see anything that visibly took control of > > > > > > > > /dev/lpt0. In dmesg, I get both ppc0 and lpt0 detected with an IRQ and IO > > > > > > > > address fine. What could be wrong? Thank you > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > > > > > > > with "unsubscribe freebsd-hardware" in the body of the message > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > > > > > > > John L. Utz III > > > > > > > john@utzweb.net > > > > > > > > > > > > > > Idiocy is the Impulse Function in the Convolution of Life > > > > > > > > > > > > > > > > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > > > > > > with "unsubscribe freebsd-hardware" in the body of the message > > > > > > > > > > > > > > > > > > > > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > > > > > with "unsubscribe freebsd-hardware" in the body of the message > > > > > > > > > > > > > > > > -- > > > > > > > > > > John L. Utz III > > > > > john@utzweb.net > > > > > > > > > > Idiocy is the Impulse Function in the Convolution of Life > > > > > > > > > > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > > > > with "unsubscribe freebsd-hardware" in the body of the message > > > > > > > > > > > > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > > > with "unsubscribe freebsd-hardware" in the body of the message > > > > > > > > > > -- > > > > > > John L. Utz III > > > john@utzweb.net > > > > > > Idiocy is the Impulse Function in the Convolution of Life > > > > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > > with "unsubscribe freebsd-hardware" in the body of the message > > > > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > with "unsubscribe freebsd-hardware" in the body of the message > > > > -- > > John L. Utz III > john@utzweb.net > > Idiocy is the Impulse Function in the Convolution of Life > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message