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Article View: comp.os.msdos.programmer
Article #972

Serial Port Setup

#972
From: Mark Davidson
Date: Wed, 26 Aug 1992 20:22
46 lines
1882 bytes
I'm writing an software interface for a PS/2 model 90 to communicate
with a Sony videodisc recorder (LVR-5000) and I'm having problems
setting up the serial port. I looked at the FAQ BTW, I'm using Borland
C++ 3.0 and running it in a DOS window in OS/2 (comp.msdos.programmer)
which refered to two books, neither of which the library or the campus
bookstore has.

I've defined the name and the settings of the port in the following
macro

#define DEFAULT_PORT "COM1: 9600, N, 8, 1"

I've tried "COM1:9600N81" with COM2 as well. I use the DEFAULT_PORT
macro as an argument to the following function:

setup_tty(char *dev_name)
{
   int ofile_d;
   if (!( ofile = fopen(dev_name, "w"))) { 
	fprintf(stderr,"Could not open %s for write\n", dev_name); 
	exit(1);
	}

   if (!( ifile = fopen( dev_name, "r"))) { 
	fprintf(stderr,"Could not open %s for read\n", dev_name);
	exit(1); 
	}
etc...

And I get the first stderr message all the time.

Could someone recommend how to properly set up a serial port for input
and output.

The machine is a PS/2 model 90 running OS/2 2.0 and I'm writing the 
program in a DOS window using Borland C++ 3.0.

Thanks,

 
-- 
******************************************************
* Mark Davidson                   davidson@cs.ubc.ca *
* University of British Columbia     _   ^           *
* Mountain Bike Heaven    ^       @_(*)/   \  ^      *
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Message-ID: <1992Aug26.202240.1342@cs.ubc.ca>
Path: arc1-ca.pugleaf.net!sparky!uunet!caen!destroyer!ubc-cs!davidson

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Newsgroups: comp.os.msdos.programmer
Path: arc1-ca.pugleaf.net!sparky!uunet!caen!destroyer!ubc-cs!davidson
From: davidson@cs.ubc.ca (Mark Davidson)
Subject: Serial Port Setup
Message-ID: <1992Aug26.202240.1342@cs.ubc.ca>
Summary: Need help with system specifics or C code
Keywords: serial input output setup
Sender: usenet@cs.ubc.ca (Usenet News)
Organization: Computer Science, University of B.C., Vancouver, B.C., Canada
Date: Wed, 26 Aug 92 20:22:40 GMT
Lines: 46