Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759076AbXEXKv7 (ORCPT ); Thu, 24 May 2007 06:51:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758748AbXEXKvs (ORCPT ); Thu, 24 May 2007 06:51:48 -0400 Received: from mailer.gwdg.de ([134.76.10.26]:53946 "EHLO mailer.gwdg.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758720AbXEXKvr (ORCPT ); Thu, 24 May 2007 06:51:47 -0400 Date: Thu, 24 May 2007 12:50:58 +0200 (MEST) From: Jan Engelhardt To: "Lars K.W. Gohlke" cc: Tilman Schmidt , linux-kernel@vger.kernel.org Subject: Re: How to access correctly serial port inside module? In-Reply-To: <46556CB2.8010709@gmx.de> Message-ID: References: <46485D84.1010902@gmx.de> <46489EF1.2020509@gmx.de> <4648E9F7.5090908@imap.cc> <46536C0F.50101@imap.cc> <4655676A.1000102@gmx.de> <46556CB2.8010709@gmx.de> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Spam-Report: Content analysis: 1.5 points, 6.0 required 1.5 MAILTO_TO_SPAM_ADDR URI: Includes a link to a likely spammer email Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2034 Lines: 63 On May 24 2007 12:45, Lars K.W. Gohlke wrote: >Date: Thu, 24 May 2007 12:45:06 +0200 >From: Lars K.W. Gohlke >To: Jan Engelhardt >Cc: Tilman Schmidt , linux-kernel@vger.kernel.org >Subject: Re: How to access correctly serial port inside module? > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Jan Engelhardt schrieb: >> On May 24 2007 12:22, Lars K.W. Gohlke wrote: >> > ok, I have read everything and also have read the chapters about >> > tty_drivers. However I'm not really understand, how to ... . >> > >> > I will summarize the concrete scenario, which will lead to the >> > understanding and further solution of deadling with serial driver. >> > >> > [scenario] >> > >> > 1. in userspace I'm doing: > date > /dev/ttyS0 >> > 2. in kernelspace I want to print out this date. >> > >> > [/scenario] >> > >> > I'm really new to kernel coding, that's why I maybe understand some >> > functions not the proper way. >> > >> > I'm a bit confused. >> >> So am I. Usually, you connect two different machines with a serial cable. >> (Leaving out the special case of connecting ttyS0-ttyS1 on the same >> machine.) >> >> This poses the first question: whose kernelspace? the sender or >> the receiver side? And by "this date" do you perhaps mean >> "whatever was sent", or specifically a date? And print to _where_? >> >> Up to now, it looks like you want to do "cat > >> >> Jan > > date is an example > > and you got it, I want to do "cat -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.3 (MingW32) - GPGrelay v0.959 > > iD8DBQFGVWy0AAomYJ1taN8RAu7/AJ9+1irJURFy5KFy/wzHqSXXD5sRgACfSi49 > ec5AnOQoTz2nCt//siaiTNs= > =uj4G > -----END PGP SIGNATURE----- > Jan -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/