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/*
* mb2hal
* Userspace HAL component to communicate with one or more Modbus devices.
*
* Victor Rocco, adapted from Les Newell's modbuscomms.c which is
* Copyright (C) 2009-2012 Les Newell <les@sheetcam.com>
* source code in http://wiki.linuxcnc.org/cgi-bin/wiki.pl?ContributedComponents
*
* Copyright (C) 2012 Victor Rocco <victor_rocco AT hotmail DOT com>
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA.
*/
2012-11-12:
# Arduino example added.
- Tested with Arduino Mega 2560 R3 using Modbusino over USB at 115200 bps.
# New parameters in config file.
- HAL_MODULE_NAME, MB_RESPONSE_TIMEOUT_MS and MB_BYTE_TIMEOUT_MS.
# New HAL pin "num_errors" for each transaction. num_errors = 0 if last
transaction OK, else the count of failed transactions.
# Fix a bug, OPTIONAL's parameters may be 0 instead of default value if
not specified in 1st transaction.
2012-11-08:
# Mb2hal now uses libmodbus3 instead of the old libmodbus
src/hal/user_comps/modbus.c used by gs2_vfd.c
- Fix some bugs detailed in 2012-10-19.
- Also fix some things to do detailed in 2012-10-16.
2012-10-19:
# KNOWN BUGS:
- Actual modbus.c doesn't handle Modbus errors code correctly, some times
shows TIME OUT instead of the error code trasmited by the slave.
Proposal: use the new libmodbus3 instead of modbus.c (Fixed 2012-11-08).
- Actual modbus.c need a patch "fix tcp protocol error" that is not on master
(is in 2.5_branch) (Fixed 2012-11-08).
- Actual modbus.c need the patch 0002-A-number-of-bug-fixes-for-modbus.patch
by Les Newell, fix compute_response_size and force_multiple_coils
(fnct_15_write_multiple_coils in mb2hal) (Fixed 2012-11-08).
- halrun: unloadusr mb2hal or unload mb2hal, mb2hal in defunct state until
quitting halrun.
- "Preparing contributions" shows error at creating Debian packages.
I should ignore them according to emc-devel mailing list responses.
- Lot of english grammar translations ;=)
# TESTS:
- Test 04 OK, all functions.
- TCP = MoD_RsSim V8.20 (www.plcsimulator.org) on Windows XP SP3.
. fnct_02_read_discrete_inputs
. fnct_03_read_holding_registers
. fnct_04_read_input_registers
. fnct_15_write_multiple_coils
. fnct_16_write_multiple_registers
2012-10-16:
# STATUS:
- Almost stable, ready to test in depth.
# TODO list:
- #include "../modbus.h" must be #include "modbus.h", problem with Submakefile.
(Fixed 2012-11-08).
- INI: Optional invert bit, input and output.
- INI: Optional scaled ints and floats, input and output.
- INI: hal module name configuration (now is mb2hal).
- INI: MB_TX_CODE better documentation (Fixed 2012-11-08).
- HAL example files.
- INI: better check of parameters not specified and copied from the previous
link (compare link number instead of type_com).
- INI: HAL pin names configuration.
- INI: HAL array of bits from register (integer).
- Replace actual code based on modbus.c (old libmodbus used by gs2_vfd.c)
with new code based on libmodbus3 (Fixed 2012-11-08).
- Incorporate more Modbus functions.
- Better english translation (I must find someone that want to help).
# TESTS:
- Test 01, 02 and 03. All OK.
- TCP = Remote IO Delta RTU-EN01, 24 inputs, 8 outputs.
. fnct_02_read_discrete_inputs
. fnct_15_write_multiple_coils
. fnct_03_read_holding_registers
- RS232 = Servo Drive Delta ASDA-B (1021-A 1Kw).
. fnct_03_read_holding_registers
- Standalone tests with halrun, not with LinuxCNC.
- Shutting down both devices and power up again = OK (mb2hal reconnects).
- 1 Hour continuous functionning shows no errors.
# CODING STYLE:
- astyle version 2.02.1
- astyle -A10s4HUjyk3W3 hal/user_comps/mb2hal/*.c
- some switches are already in -A10.
- A10 = 1tbs or otbs, One True Brace Style formatting/indenting.
Similar to Kernighan & Ritchie style but add brackets to all conditionals.
Use Linux brackets.
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