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Use NuttX types in FreeModBus port; Add FreeModBus demo at apps/examples/modbus; Add new termios APIs
git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4964 7fd9a85b-ad96-42d3-883c-3090e2eb8679
This commit is contained in:
patacongo
@@ -63,6 +63,10 @@ menu "File system mount example"
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source "$APPSDIR/examples/mount/Kconfig"
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endmenu
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menu "FreeModBus example"
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source "$APPSDIR/examples/modbus/Kconfig"
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endmenu
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menu "Network test example"
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source "$APPSDIR/examples/nettest/Kconfig"
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endmenu
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@@ -38,10 +38,10 @@
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# Sub-directories
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SUBDIRS = adc buttons can cdcacm composite dhcpd ftpc ftpd hello helloxx \
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hidkbd igmp lcdrw mm mount nettest nsh null nx nxconsole nxffs nxflat \
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nxhello nximage nxlines nxtext ostest pashello pipe poll pwm qencoder \
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rgmp romfs serloop telnetd thttpd tiff touchscreen udp uip usbserial \
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sendmail usbstorage usbterm watchdog wget wlan
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hidkbd igmp lcdrw mm modbus mount nettest nsh null nx nxconsole nxffs \
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nxflat nxhello nximage nxlines nxtext ostest pashello pipe poll pwm \
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qencoder rgmp romfs serloop telnetd thttpd tiff touchscreen udp uip \
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usbserial sendmail usbstorage usbterm watchdog wget wlan
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# Sub-directories that might need context setup. Directories may need
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# context setup for a variety of reasons, but the most common is because
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@@ -56,7 +56,7 @@ SUBDIRS = adc buttons can cdcacm composite dhcpd ftpc ftpd hello helloxx \
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CNTXTDIRS = pwm
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ifeq ($(CONFIG_NSH_BUILTIN_APPS),y)
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CNTXTDIRS += adc can cdcacm composite ftpd dhcpd nettest qencoder telnetd watchdog
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CNTXTDIRS += adc can cdcacm composite ftpd dhcpd modbus nettest qencoder telnetd watchdog
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endif
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ifeq ($(CONFIG_EXAMPLES_HELLO_BUILTIN),y)
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@@ -483,6 +483,21 @@ examples/mm
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advantage that it runs in the actual NuttX tasking environment (the
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mm/mm_test.c only runs in a PC simulation environment).
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examples/modbus
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^^^^^^^^^^^^^^^
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This is a port of the FreeModbus Linux demo. It derives from the
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demos/LINUX directory of the FreeModBus version 1.5.0 (June 6, 2010)
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that can be downloaded in its entirety from http://developer.berlios.de/project/showfiles.php?group_id=6120.
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CONFIG_EXAMPLES_MODBUS_REG_INPUT_START, Default 1000
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CONFIG_EXAMPLES_MODBUS_REG_INPUT_NREGS, Default 4
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CONFIG_EXAMPLES_MODBUS_REG_HOLDING_START, Default 2000
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CONFIG_EXAMPLES_MODBUS_REG_HOLDING_NREGS, Default 130
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The FreeModBus library resides at apps/modbus. See apps/modbus/README.txt
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for additional configuration information.
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examples/mount
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^^^^^^^^^^^^^^
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Executable → Regular
@@ -0,0 +1,13 @@
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#
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# For a description of the syntax of this configuration file,
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# see misc/tools/kconfig-language.txt.
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#
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config EXAMPLES_MODBUS
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bool "FreeModBus example"
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default n
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---help---
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Enable the FreeModBus example
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if EXAMPLES_MODBUS
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endif
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@@ -0,0 +1,105 @@
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############################################################################
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# apps/examples/modbus/Makefile
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#
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# Copyright (C) 2012 Gregory Nutt. All rights reserved.
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# Author: Gregory Nutt <gnutt@nuttx.org>
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
|
||||
# are met:
|
||||
#
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||||
# 1. Redistributions of source code must retain the above copyright
|
||||
# notice, this list of conditions and the following disclaimer.
|
||||
# 2. Redistributions in binary form must reproduce the above copyright
|
||||
# notice, this list of conditions and the following disclaimer in
|
||||
# the documentation and/or other materials provided with the
|
||||
# distribution.
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||||
# 3. Neither the name NuttX nor the names of its contributors may be
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||||
# used to endorse or promote products derived from this software
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||||
# without specific prior written permission.
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||||
#
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||||
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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||||
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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||||
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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||||
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
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# POSSIBILITY OF SUCH DAMAGE.
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#
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############################################################################
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-include $(TOPDIR)/.config
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-include $(TOPDIR)/Make.defs
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include $(APPDIR)/Make.defs
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# FreeModBus demo built-in application info
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APPNAME = modbus
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PRIORITY = SCHED_PRIORITY_DEFAULT
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STACKSIZE = 2048
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# FreeModBus demo
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ASRCS =
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CSRCS = modbus_main.c
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AOBJS = $(ASRCS:.S=$(OBJEXT))
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COBJS = $(CSRCS:.c=$(OBJEXT))
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SRCS = $(ASRCS) $(CSRCS)
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OBJS = $(AOBJS) $(COBJS)
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ifeq ($(WINTOOL),y)
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BIN = "${shell cygpath -w $(APPDIR)/libapps$(LIBEXT)}"
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else
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BIN = "$(APPDIR)/libapps$(LIBEXT)"
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endif
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ROOTDEPPATH = --dep-path .
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# Common build
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VPATH =
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all: .built
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.PHONY: clean depend distclean
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$(AOBJS): %$(OBJEXT): %.S
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$(call ASSEMBLE, $<, $@)
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$(COBJS): %$(OBJEXT): %.c
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$(call COMPILE, $<, $@)
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.built: $(OBJS)
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@( for obj in $(OBJS) ; do \
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$(call ARCHIVE, $(BIN), $${obj}); \
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done ; )
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@touch .built
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.context:
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ifeq ($(CONFIG_NSH_BUILTIN_APPS),y)
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$(call REGISTER,$(APPNAME),$(PRIORITY),$(STACKSIZE),$(APPNAME)_main)
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@touch $@
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endif
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context: .context
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.depend: Makefile $(SRCS)
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@$(MKDEP) $(ROOTDEPPATH) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
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@touch $@
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depend: .depend
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clean:
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@rm -f *.o *~ .*.swp .built
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$(call CLEAN)
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distclean: clean
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@rm -f Make.dep .depend
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-include Make.dep
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@@ -0,0 +1,531 @@
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/****************************************************************************
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* examples/modbus/main.c
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*
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* Copyright (C) 2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
* 3. Neither the name NuttX nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************
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* Leveraged from:
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*
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* FreeModbus Libary: Linux Demo Application
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* Copyright (C) 2006 Christian Walter <wolti@sil.at>
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*
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* This library is free software; you can redistribute it and/or
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||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
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* version 2.1 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.
|
||||
*
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||||
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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||||
*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <pthread.h>
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#include <signal.h>
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#include <errno.h>
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#include <apps/modbus/mb.h>
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#include <apps/modbus/mbport.h>
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/****************************************************************************
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* Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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#ifndef CONFIG_EXAMPLES_MODBUS_REG_INPUT_START
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# define CONFIG_EXAMPLES_MODBUS_REG_INPUT_START 1000
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#endif
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#ifndef CONFIG_EXAMPLES_MODBUS_REG_INPUT_NREGS
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# define CONFIG_EXAMPLES_MODBUS_REG_INPUT_NREGS 4
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#endif
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#ifndef CONFIG_EXAMPLES_MODBUS_REG_HOLDING_START
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# define CONFIG_EXAMPLES_MODBUS_REG_HOLDING_START 2000
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#endif
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#ifndef CONFIG_EXAMPLES_MODBUS_REG_HOLDING_NREGS
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# define CONFIG_EXAMPLES_MODBUS_REG_HOLDING_NREGS 130
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#endif
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#ifdef CONFIG_NSH_BUILTIN_APPS
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# define MAIN_NAME modbus_main
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# define MAIN_NAME_STRING "modbus_main: "
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#else
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# define MAIN_NAME user_start
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||||
# define MAIN_NAME_STRING "user_start: "
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#endif
|
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/****************************************************************************
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||||
* Private Types
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****************************************************************************/
|
||||
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||||
enum modbus_threadstate_e
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{
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||||
STOPPED = 0,
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RUNNING,
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||||
SHUTDOWN
|
||||
};
|
||||
|
||||
struct modbus_state_s
|
||||
{
|
||||
enum modbus_threadstate_e threadstate;
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||||
uint16_t reginput[CONFIG_EXAMPLES_MODBUS_REG_INPUT_NREGS];
|
||||
uint16_t regholding[CONFIG_EXAMPLES_MODBUS_REG_HOLDING_NREGS];
|
||||
pthread_t threadid;
|
||||
pthread_mutex_t lock;
|
||||
volatile bool quit;
|
||||
};
|
||||
|
||||
/****************************************************************************
|
||||
* Private Function Prototypes
|
||||
****************************************************************************/
|
||||
|
||||
static inline int modbus_initialize(void);
|
||||
static void *modbus_pollthread(void *pvarg);
|
||||
static inline int modbus_create_pollthread(void);
|
||||
static void modbus_showusage(FAR const char *progname, int exitcode);
|
||||
|
||||
/****************************************************************************
|
||||
* Private Data
|
||||
****************************************************************************/
|
||||
|
||||
static struct modbus_state_s g_modbus;
|
||||
static const uint8_t g_slaveid[] = { 0xaa, 0xbb, 0xcc };
|
||||
|
||||
/****************************************************************************
|
||||
* Private Functions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Name: modbus_initialize
|
||||
*
|
||||
* Description:
|
||||
* Called from the ModBus polling thread in order to initialized the
|
||||
* FreeModBus interface.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
static inline int modbus_initialize(void)
|
||||
{
|
||||
eMBErrorCode mberr;
|
||||
int status;
|
||||
|
||||
/* Verify that we are in the stopped state */
|
||||
|
||||
if (g_modbus.threadstate != STOPPED)
|
||||
{
|
||||
fprintf(stderr, MAIN_NAME_STRING
|
||||
"ERROR: Bad state: %d\n", g_modbus.threadstate);
|
||||
return EINVAL;
|
||||
}
|
||||
|
||||
/* Initialize the ModBus demo data structures */
|
||||
|
||||
status = pthread_mutex_init(&g_modbus.lock, NULL);
|
||||
if (status != 0)
|
||||
{
|
||||
fprintf(stderr, MAIN_NAME_STRING
|
||||
"ERROR: pthread_mutex_init failed: %d\n", status);
|
||||
return status;
|
||||
}
|
||||
|
||||
status = ENODEV;
|
||||
|
||||
/* Initialize the FreeModBus library */
|
||||
|
||||
mberr = eMBInit(MB_RTU, 0X0A, 0, 38400, MB_PAR_EVEN);
|
||||
if (mberr != MB_ENOERR)
|
||||
{
|
||||
fprintf(stderr, MAIN_NAME_STRING
|
||||
"ERROR: eMBInit failed: %d\n", mberr);
|
||||
goto errout_with_mutex;
|
||||
}
|
||||
|
||||
/* Set the slave ID */
|
||||
|
||||
mberr = eMBSetSlaveID(0x34, TRUE, g_slaveid, 3);
|
||||
if (mberr != MB_ENOERR)
|
||||
{
|
||||
fprintf(stderr, MAIN_NAME_STRING
|
||||
"ERROR: eMBSetSlaveID failed: %d\n", mberr);
|
||||
goto errout_with_modbus;
|
||||
}
|
||||
|
||||
/* Enable FreeModBus */
|
||||
|
||||
mberr = eMBEnable();
|
||||
if (mberr == MB_ENOERR)
|
||||
{
|
||||
fprintf(stderr, MAIN_NAME_STRING
|
||||
"ERROR: eMBEnable failed: %d\n", mberr);
|
||||
goto errout_with_modbus;
|
||||
}
|
||||
|
||||
/* Successfully initialized */
|
||||
|
||||
g_modbus.threadstate = RUNNING;
|
||||
return OK;
|
||||
|
||||
errout_with_modbus:
|
||||
/* Release hardware resources. */
|
||||
|
||||
(void)eMBClose();
|
||||
|
||||
errout_with_mutex:
|
||||
|
||||
/* Free/uninitialize data structures */
|
||||
|
||||
(void)pthread_mutex_destroy(&g_modbus.lock);
|
||||
|
||||
g_modbus.threadstate = STOPPED;
|
||||
return status;
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
* Name: modbus_pollthread
|
||||
*
|
||||
* Description:
|
||||
* This is the ModBus polling thread.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
static void *modbus_pollthread(void *pvarg)
|
||||
{
|
||||
eMBErrorCode mberr;
|
||||
int ret;
|
||||
|
||||
/* Initialize the modbus */
|
||||
|
||||
ret = modbus_initialize();
|
||||
if (ret != OK)
|
||||
{
|
||||
fprintf(stderr, MAIN_NAME_STRING
|
||||
"ERROR: modbus_initialize failed: %d\n", ret);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* Then loop until we are commanded to shutdown */
|
||||
|
||||
do
|
||||
{
|
||||
/* Poll */
|
||||
|
||||
mberr = eMBPoll();
|
||||
if (mberr != MB_ENOERR)
|
||||
{
|
||||
break;
|
||||
}
|
||||
|
||||
/* Generate some random input */
|
||||
|
||||
g_modbus.reginput[0] = (uint16_t)rand();
|
||||
}
|
||||
while (g_modbus.threadstate != SHUTDOWN);
|
||||
|
||||
/* Disable */
|
||||
|
||||
(void)eMBDisable();
|
||||
|
||||
/* Release hardware resources. */
|
||||
|
||||
(void)eMBClose();
|
||||
|
||||
/* Free/uninitialize data structures */
|
||||
|
||||
(void)pthread_mutex_destroy(&g_modbus.lock);
|
||||
g_modbus.threadstate = STOPPED;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
* Name: modbus_create_pollthread
|
||||
*
|
||||
* Description:
|
||||
* Start the ModBus polling thread
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
static inline int modbus_create_pollthread(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
if (g_modbus.threadstate == STOPPED)
|
||||
{
|
||||
ret = pthread_create(&g_modbus.threadid, NULL, modbus_pollthread, NULL);
|
||||
}
|
||||
else
|
||||
{
|
||||
ret = EINVAL;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
* Name: modbus_showusage
|
||||
*
|
||||
* Description:
|
||||
* Show usage of the demo program and exit
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
static void modbus_showusage(FAR const char *progname, int exitcode)
|
||||
{
|
||||
printf("USAGE: %s [-d|e|s|q|h]\n\n", progname);
|
||||
printf("Where:\n");
|
||||
printf(" -d : Disable protocol stack\n");
|
||||
printf(" -e : Enable the protocol stack\n");
|
||||
printf(" -s : Show current status\n");
|
||||
printf(" -q : Quit application\n");
|
||||
printf(" -h : Show this information\n");
|
||||
printf("\n");
|
||||
exit(exitcode);
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
* Public Functions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Name: user_start/modbus_main
|
||||
*
|
||||
* Description:
|
||||
* This is the main entry point to the demo program
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
int MAIN_NAME(int argc, char *argv[])
|
||||
{
|
||||
int option;
|
||||
int ret;
|
||||
|
||||
/* Handle command line arguments */
|
||||
|
||||
g_modbus.quit = FALSE;
|
||||
|
||||
while ((option = getopt(argc, argv, "desqh")) != ERROR)
|
||||
{
|
||||
switch (option)
|
||||
{
|
||||
case 'd': /* Disable protocol stack */
|
||||
(void)pthread_mutex_lock(&g_modbus.lock);
|
||||
g_modbus.threadstate = SHUTDOWN;
|
||||
(void)pthread_mutex_unlock(&g_modbus.lock);
|
||||
break;
|
||||
|
||||
case 'e': /* Enable the protocol stack */
|
||||
{
|
||||
ret = modbus_create_pollthread();
|
||||
if (ret != OK)
|
||||
{
|
||||
fprintf(stderr, MAIN_NAME_STRING
|
||||
"ERROR: modbus_create_pollthread failed: %d\n", ret);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
}
|
||||
break;
|
||||
|
||||
case 's': /* Show current status */
|
||||
switch (g_modbus.threadstate)
|
||||
{
|
||||
case RUNNING:
|
||||
printf(MAIN_NAME_STRING "Protocol stack is running\n");
|
||||
break;
|
||||
|
||||
case STOPPED:
|
||||
printf(MAIN_NAME_STRING "Protocol stack is stopped\n");
|
||||
break;
|
||||
|
||||
case SHUTDOWN:
|
||||
printf(MAIN_NAME_STRING "Protocol stack is shutting down\n");
|
||||
break;
|
||||
|
||||
default:
|
||||
fprintf(stderr, MAIN_NAME_STRING
|
||||
"ERROR: Invalid thread state: %d\n",
|
||||
g_modbus.threadstate);
|
||||
break;
|
||||
}
|
||||
break;
|
||||
|
||||
case 'q': /* Quit application */
|
||||
g_modbus.quit = TRUE;
|
||||
pthread_kill(g_modbus.threadid, 9);
|
||||
break;
|
||||
|
||||
case 'h': /* Show help info */
|
||||
modbus_showusage(argv[0], EXIT_SUCCESS);
|
||||
break;
|
||||
|
||||
default:
|
||||
fprintf(stderr, MAIN_NAME_STRING
|
||||
"ERROR: Unrecognized option: '%c'\n", option);
|
||||
modbus_showusage(argv[0], EXIT_FAILURE);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return EXIT_SUCCESS;
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
* Name: eMBRegInputCB
|
||||
*
|
||||
* Description:
|
||||
* Required FreeModBus callback function
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
eMBErrorCode eMBRegInputCB(uint8_t *buffer, uint16_t address, uint16_t nregs)
|
||||
{
|
||||
eMBErrorCode mberr = MB_ENOERR;
|
||||
int index;
|
||||
|
||||
if ((address >= CONFIG_EXAMPLES_MODBUS_REG_INPUT_START) &&
|
||||
(address + nregs <=
|
||||
CONFIG_EXAMPLES_MODBUS_REG_INPUT_START +
|
||||
CONFIG_EXAMPLES_MODBUS_REG_INPUT_NREGS))
|
||||
{
|
||||
index = (int)(address - CONFIG_EXAMPLES_MODBUS_REG_INPUT_START);
|
||||
while (nregs > 0)
|
||||
{
|
||||
*buffer++ = (uint8_t)(g_modbus.reginput[index] >> 8);
|
||||
*buffer++ = (uint8_t)(g_modbus.reginput[index] & 0xff);
|
||||
index++;
|
||||
nregs--;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
mberr = MB_ENOREG;
|
||||
}
|
||||
|
||||
return mberr;
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
* Name: eMBRegHoldingCB
|
||||
*
|
||||
* Description:
|
||||
* Required FreeModBus callback function
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
eMBErrorCode eMBRegHoldingCB(uint8_t *buffer, uint16_t address, uint16_t nregs,
|
||||
eMBRegisterMode mode)
|
||||
{
|
||||
eMBErrorCode mberr = MB_ENOERR;
|
||||
int index;
|
||||
|
||||
if ((address >= CONFIG_EXAMPLES_MODBUS_REG_HOLDING_START) &&
|
||||
(address + nregs <=
|
||||
CONFIG_EXAMPLES_MODBUS_REG_HOLDING_START +
|
||||
CONFIG_EXAMPLES_MODBUS_REG_HOLDING_NREGS))
|
||||
{
|
||||
index = (int)(address - CONFIG_EXAMPLES_MODBUS_REG_HOLDING_START);
|
||||
switch (mode)
|
||||
{
|
||||
/* Pass current register values to the protocol stack. */
|
||||
case MB_REG_READ:
|
||||
while (nregs > 0)
|
||||
{
|
||||
*buffer++ = (uint8_t)(g_modbus.regholding[index] >> 8);
|
||||
*buffer++ = (uint8_t)(g_modbus.regholding[index] & 0xff);
|
||||
index++;
|
||||
nregs--;
|
||||
}
|
||||
break;
|
||||
|
||||
/* Update current register values with new values from the
|
||||
* protocol stack.
|
||||
*/
|
||||
|
||||
case MB_REG_WRITE:
|
||||
while (nregs > 0)
|
||||
{
|
||||
g_modbus.regholding[index] = *buffer++ << 8;
|
||||
g_modbus.regholding[index] |= *buffer++;
|
||||
index++;
|
||||
nregs--;
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
mberr = MB_ENOREG;
|
||||
}
|
||||
|
||||
return mberr;
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
* Name: eMBRegCoilsCB
|
||||
*
|
||||
* Description:
|
||||
* Required FreeModBus callback function
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
eMBErrorCode eMBRegCoilsCB(uint8_t *buffer, uint16_t address, uint16_t ncoils,
|
||||
eMBRegisterMode mode)
|
||||
{
|
||||
return MB_ENOREG;
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
* Name: eMBRegDiscreteCB
|
||||
*
|
||||
* Description:
|
||||
* Required FreeModBus callback function
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
eMBErrorCode eMBRegDiscreteCB(uint8_t *buffer, uint16_t address, uint16_t ndiscrete)
|
||||
{
|
||||
return MB_ENOREG;
|
||||
}
|
||||
Reference in New Issue
Block a user