Mailing-List: contact cygwin-help@sourceware.cygnus.com; run by ezmlm List-Unsubscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@sourceware.cygnus.com Delivered-To: mailing list cygwin@sourceware.cygnus.com Message-ID: <37C0F23A.A17B6C1@tbit.dk> Date: Mon, 23 Aug 1999 09:03:22 +0200 From: Kim Poulsen Organization: Ericsson Telebit A/S X-Mailer: Mozilla 4.61 [en] (Win98; I) X-Accept-Language: en MIME-Version: 1.0 CC: cygwin@sourceware.cygnus.com Subject: Re: Serial port programming References: <37C0EAC4.63151D86@tbit.dk> <199908230653.IAA17307@mailhostnew.tbit.dk> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit It would seem that I can open the files called /dev/com2, /dev/ttyS1, and com2 but I cannot read or write (with fopen(..., "rw");) from the file. Why might that be so? The program core dumps with an STATUS_ACCESS_VIOLATION error on the fgetc() or fputc() command. Baron Shatturday wrote: > > I've got the following problem: I need to access the serial ports of > >my PC through an ANSI C program. How do I do that ? I have already > >tried using fopen("/dev/com2", "r") > Have you tried using ("/dev/ttyS1", "r")? > Just a thought... -- Kim Poulsen, B.Sc.E.E, System Developer HW Ericsson Telebit A/S Tel: + 45 86 28 81 76 Fabriksvej 11 Fax: + 45 86 28 81 86 DK-8260 Viby J E-mail: info@tbit.dk Denmark URL: http://www.tbit.dk/ -- Want to unsubscribe from this list? Send a message to cygwin-unsubscribe@sourceware.cygnus.com