Date: Sun, 31 Jul 2005 16:14:04 -0500 From: David Kelly <dkelly@HiWAAY.net> To: FreeBSD_Questions FreeBSD_Questions <freebsd-questions@freebsd.org> Subject: Re: C program to write to the com port Message-ID: <8534437C-2442-47A3-9B58-873E4CBD92B6@HiWAAY.net> In-Reply-To: <01cb01c595df$435ed060$6600a8c0@w2k2> References: <01cb01c595df$435ed060$6600a8c0@w2k2>
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On Jul 31, 2005, at 9:50 AM, Paul Hamilton wrote: > I am trying to write a C program that will send 3 bytes to the > cuaa0 com > port at 9600 baud, 8n1. Oddly I found information on how to do that very easy to find for Unix. Conversely wanted to do the same thing in Windows and hit a brick wall. Everyone does it differently with different compilers. So I told the boss a Windows Weenie would have to take over. Had a perfectly good minimal text-only program which formed serial Modbus ASCII packets, and displayed the response, under FreeBSD. Would be interested in a library for mingw or similar with termios cloned. Else some simple documented way to do unbuffered serial I/O. ASCII Modbus doesn't really require unbuffered I/O but thats the path I started on and would be required for Modbus RTU mode. -- David Kelly N4HHE, dkelly@HiWAAY.net ======================================================================== Whom computers would destroy, they must first drive mad.
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