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apps/modbus README
==================
This directory contains a port of last open source version of freemodbus
(BSD license). The code in this directory is a subset of freemodbus version
1.5.0 (June 6, 2010) that can be downloaded in its entirety from http://developer.berlios.de/project/showfiles.php?group_id=6120.
Directory Structure/Relation to freemodbus-v1.5.0
-------------------------------------------------
The original freemodbus download consists of several directories. This
subset takes only the contents of one directory, modbus/, that implements
the core modbus logic and integrates that directory into the NuttX build
system. The mapping between freemodbus-v1.5.0 and the nuttx directories
is shown below:
--------------------------- ----------------------------------------------
freemodbus-v1.5.0 Nuttx
--------------------------- ----------------------------------------------
All top level .txt files Not included
demo/ Not included. This directory contains demo
and porting code for a variety of platforms.
The NuttX demo was ported from the the LINUX
demo in this director and can be found at
apps/examples/modbus.
doc/ Note included. This directory contains Doxygen
support files.
modbus/ Included in its entirety in various locations:
ascii apps/modbus/ascii
functions apps/modbus/functions
include apps/include/modbus
mb.c apps/modbus/mb.c
rtu apps/modbus/rtu
tcp apps/modbus/tcp
tools/ Note included. This directory contain Doxygen
tools.
--------------------------- ----------------------------------------------
So this directory is equivalent to the freemodbus-v1.5.0/modbus
directory except that (1) it may include modifications for the integration
with NuttX and (2) the modbus/include directory was moved to apps/modbus.
The original, unmodified freemodbus-v1.5.0 was checked in as SVN revision
4937
The other directory here, nuttx/, implements the NuttX modbus interface.
It derives from the freemodbus-v1.5.0/demo/LINUX/port directory.
Note
====
The developer of freemodbus, Christian Walter, is still developing Modbus
libraries, although they are now commercial. See
http://www.embedded-solutions.at/ for further information.
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