FreeModbus
FreeModbus
FreeModbus
Modules
Modbus
Modbus Registers
Modbus
Configuration
Utilities
Examples
AVR/demo.c
LINUX/demo.c
MCF5235/demo.c
MCF5235TCP/demo.
c
MSP430/demo.c
STR71X/simple2.c
STR71XTCP/demo.c
WIN32/demo.cpp
WIN32TCP/demo.
cpp
Related Pages
Porting for RTU/
ASCII
Tips
FreeModbus
1.1.0
Introduction
The latest version of this document is available on http://freemodbus.
berlios.de/api.
FreeModbus is a Modbus ASCII/RTU and Modbus TCP
implementation for embedded systems. It provides an
implementation of the Modbus Application Protocol v1.1a and
supports the RTU/ASCII transmission modes defined in the Modbus
over serial line specification 1.0. Since version 0.7 FreeModbus also
supports Modbus/TCP. Version 0.9 added the first Modbus/TCP port
for embedded systems using the
lwIP TCP/IP stack.
Ports
ARM devices:
❍ STR71X with FreeRTOS/GCC. See STR71X/simple2.
c for an example.
❍ STR71TCP with FreeRTOS/lwIP/GCC. This port
includes FreeRTOS, lwIP and a fully working PPP
stack. The lwIP, PPP and FreeRTOS part is generic
and therefore can be used for other ports ( or other
projects ).
AVR devices:
❍ ATMega8/16/32/128/168/169 with WinAVR. See AVR/
demo.c for an example.
Coldfire devices:
❍ MCF5235 with GCC. See MCF5235/demo.c for an
example.
❍ MCF5235/TCP with GCC. This port features
FreeRTOS and the lwIP stack. The lwIP part is
generic and therefore it should be used as a basis for
other lwIP ports.
MSP430 devices
❍ MSP430F169 with Rowley Crossworks. See MSP430/
demo.c for an example.
http://freemodbus.berlios.de/api/index.html (1 of 2)2006-11-30 16:11:02