Serial Communications
USER’S MANUAL
VER. 1.0 • SEP 2001
No part of this manual may be reproduced without permission
Testing PCI/ISA &
PCMCIA Serial Cards
Instructions on How to Use
HyperTerminal to Test Serial Cards
®
CyberResearch
®, Inc.
www.cyberresearch.com
25 Business Park Dr., Branford, CT 06405 USA
203-483-8815 (9am to 5pm EST) FAX: 203-483-9024
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©Copyright 2003
All Rights Reserved.
April 2003
The information in this document is subject to change without prior notice
in order to improve reliability, design, and function and does not represent
a commitment on the part of CyberResearch, Inc.
In no event will CyberResearch, Inc. be liable for direct, indirect, special,
incidental, or consequential damages arising out of the use of or inability
to use the product or documentation, even if advised of the possibility of
such damages.
This document contains proprietary information protected by copyright.
All rights are reserved. No part of this manual may be reproduced by any
mechanical, electronic, or other means in any form without prior written
permission of CyberResearch, Inc.
Trademarks
“CyberResearch,” is a trademark of CyberResearch, Inc. Other product
names mentioned herein are used for identification purposes only and may
be trademarks and/or registered trademarks of their respective companies.
• NOTICE •
CyberResearch, Inc. does not authorize any CyberResearch product for
use in life support systems, medical equipment, and/or medical devices
without the written approval of the President of CyberResearch, Inc. Life
support devices and systems are devices or systems which are intended
for surgical implantation into the body, or to support or sustain life and
whose failure to perform can be reasonably expected to result in injury.
Other medical equipment includes devices used for monitoring, data
acquisition, modification, or notification purposes in relation to life
support, life sustaining, or vital statistic recording. CyberResearch
products are not designed with the components required, are not subject
to the testing required, and are not submitted to the certification required
to ensure a level of reliability appropriate for the treatment and diagnosis of
humans.
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Contents
1. Introduction ...1
2. Loopback for RS232 serial cards ...1
3. Loopback for RS422/485 serial cards ...1
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1. Introduction
This document describes how to use the Microsoft HyperTerminal application in order to prove that your CyberResearch® serial card is functioning correctly. This assumes that the card is correctly installed. Windows 2000 Professional is used in the example. However, the document also applies to Windows 9x, Millennium, NTx and XP.
In this example the card installed is a CYB 2232U RS232 2-port PCI card on “COM1” but it can be applied to any COM label.
2. Loopback for RS232 serial cards
On the ‘D’ type connector, electrically short pins 2 and 3. This can be easily achieved by placing an electrical jumper over the pins. See below:
1
3. Loopback for RS422/485 serial cards
On the card there are a set of multiplex jumpers. These are the set nearest to the ‘D’ type connectors. They need to have the jumpers on, i.e., Tx+ shorted to Rx+ and Tx- shorted to Rx-. See below:
Go to Device Manager (Control Panel/System/Hardware) and double click on the card’s entry under Multi-port Serial Adaptor (Multi-Function Adaptor in Window 9x). In the Card Properties tab click on the port button next to the COM port to be tested:
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4. Using HyperTerminal
Set up the card to be able to perform a loopback. See 2 and 3.
From the Start menu select Programs\Accessories\Communications\HyperTerminal or perform a search in My Computer for “HyperTerminal”
Double click on the application and the following window will appear:
Type in a connection identifier name say “Test1” and click OK. The only restriction here is it cannot be a device name e.g. “COM1”
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Please note in Windows 9x and Millennium only, COM labels COM1 to COM4 are available. If the port under test is COM5 then the COM label will need to be changed from Device Manager.
The next dialogue box will ask for the Port Communication Settings:
Click “Restore Defaults” then OK.
If all went well you would then be give a blank dialogue box with a flashing cursor. The COM port is now open and ready to transmit and receive data.
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Click OK for both open dialogue boxes and the original blank screen will appear again. Ensure the loopback connector is connected as described in section 2/3.
Now, every time a character on the keyboard is pressed two will appear on the screen:
This means that characters are being transmitted and received through the loopback. If you don’t believe us remove the loopback connector. This time you should only see one character each time a key is pressed.
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Product Service
Diagnosis and Debug
CyberResearch, Inc. maintains technical support lines staffed by experienced
Applications Engineers and Technicians. There is no charge to call and we will
return your call promptly if it is received while our lines are busy. Most problems
encountered with data acquisition products can be solved over the phone. Signal
connections and programming are the two most common sources of difficulty.
CyberResearch support personnel can help you solve these problems, especially
if you are prepared for the call.
To ensure your call’s overall success and expediency:
1)
Have the phone close to the PC so you can conveniently and quickly take
action that the Applications Engineer might suggest.
2)
Be prepared to open your PC, remove boards, report back-switch or
jumper settings, and possibly change settings before reinstalling the
modules.
3)
Have a volt meter handy to take measurements of the signals you are
trying to measure as well as the signals on the board, module, or power
supply.
4)
Isolate problem areas that are not working as you expected.
5)
Have the source code to the program you are having trouble with available
so that preceding and prerequisite modes can be referenced and
discussed.
6)
Have the manual at hand. Also have the product’s utility disks and any
other relevant disks nearby so programs and version numbers can be
checked.
Preparation will facilitate the diagnosis procedure, save you time, and avoid
repeated calls. Here are a few preliminary actions you can take before you call
which may solve some of the more common problems:
1)
Check the PC-bus power and any power supply signals.
2)
Check the voltage level of the signal between SIGNAL HIGH and SIGNAL
LOW, or SIGNAL+ and SIGNAL– . It CANNOT exceed the full scale range
of the board.
3)
Check the other boards in your PC or modules on the network for address
and interrupt conflicts.
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