Com port error

Article View: borland.public.cppbuilder.nativeapi

Article #3472

Back to borland.public.cppbuilder.nativeapi Previous Next

#3472

From: JD
Date: Thu, 15 Jun 2006 18:19

18 lines
1432 bytes

I'm trying to setup a test application that mimics a device
that would be connect to a com port so that I can test a
thread that collects data from the device.

The problem that I'm having is that I want the thread to use
WaitCommEvent which means that when I open the port using
CreateFile, I must specify FILE_FLAG_OVERLAPPED for the
dwFlagsAndAttributes parameter.

When the port is opened this way, WriteFile fails with an error
code of 997 which translates to "Overlapped I/O operation is in
progress".

Does anyone have any thoughts on how I might accomplish what I
want (just a small test that will write data to the port)?

~ JD

Technical Details

Message-ID: <4491a4c2$1@newsgroups.borland.com>

Path:

arc1-ca.pugleaf.net!g2news2.google.com!news3.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!newsfeed00.sul.t-online.de!newsfeed01.sul.t-online.de!t-online.de!newsgroups.borland.com!not-for-mail

Show Full Headers

Complete Article Headers

X-Google-Thread: 10cc67,f1782b94b4ced041
X-Google-Attributes: gid10cc67,public
X-Google-Language: ENGLISH,ASCII-7-bit
From: "JD" <nospam@nospam.com>
Sender: "JD" <nospam@nospam.com>
Reply-To: "JD" <nospam@nospam.com>
Subject: Com port error
Newsgroups: borland.public.cppbuilder.nativeapi
X-User-Info: 152.163.100.201     
X-Forwarded-For: 172.144.226.132
NNTP-Posting-Host: 207.105.83.66
Message-ID: <4491a4c2$1@newsgroups.borland.com>
Date: 15 Jun 2006 11:19:46 -0700
X-Trace: newsgroups.borland.com 1150395586 207.105.83.66 (15 Jun 2006 11:19:46 -0700)
Lines: 19
Path: arc1-ca.pugleaf.net!g2news2.google.com!news3.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!newsfeed00.sul.t-online.de!newsfeed01.sul.t-online.de!t-online.de!newsgroups.borland.com!not-for-mail