FREEMODBUS 0.8 LINUX EXAMPLE
============================
REQUIREMENTS
============
This example contains a simple demo program for a Linux host. The default
demo opens the serial port on /dev/ttyS0 and waits for commands from an
Modbus master. Demo versions of Modbus Masters can be found in [1] and [2].
INSTALLATION
============
The program can be built by calling 'make flash'. This demo application
was tested on Redhat Enterprise Linux 4 (RHEL4) but should work on any
recent distribution.
TESTING
=======
Install a Null-Modem cable between /dev/ttyS0 and /dev/ttyS1. Next start
the Modbus Sample Application and test if the input registers starting at
protocol address 1000 can be read. There are four registers value available
and the output should look like:
Polling slave (Ctrl-C to stop) ...
[1000]: 6474
[1001]: 0
[1002]: 0
[1003]: 0
Polling slave (Ctrl-C to stop) ...
[1000]: -8831
[1001]: 0
[1002]: 0
[1003]: 0
Polling slave (Ctrl-C to stop) ...
The simple testing utility used in the 'demo.sh' script can be found at [3].
[1] WinTech ModScan32: http://www.win-tech.com/html/modscan32.htm
[2] Modus Poll: http://www.modbustools.com/modbus_poll.asp
[3] FieldTalk Modpoll: http://www.focus-sw.com/fieldtalk/modpoll.html
Version: $Id: README.txt,v 1.1 2006/08/01 20:58:49 wolti Exp $
