add modbus slave support
add modbus slave support
This commit is contained in:
Supowang1989
342
components/connectivity/Modbus/3rdparty/freemodbus-v1.6/demo/LINUX/demo.c
vendored
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342
components/connectivity/Modbus/3rdparty/freemodbus-v1.6/demo/LINUX/demo.c
vendored
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@@ -0,0 +1,342 @@
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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
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* 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.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* File: $Id$
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*/
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/* ----------------------- Standard includes --------------------------------*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <pthread.h>
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#include <signal.h>
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/* ----------------------- Modbus includes ----------------------------------*/
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#include "mb.h"
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#include "mbport.h"
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/* ----------------------- Defines ------------------------------------------*/
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#define PROG "freemodbus"
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#define REG_INPUT_START 1000
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#define REG_INPUT_NREGS 4
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#define REG_HOLDING_START 2000
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#define REG_HOLDING_NREGS 130
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/* ----------------------- Static variables ---------------------------------*/
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static USHORT usRegInputStart = REG_INPUT_START;
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static USHORT usRegInputBuf[REG_INPUT_NREGS];
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static USHORT usRegHoldingStart = REG_HOLDING_START;
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static USHORT usRegHoldingBuf[REG_HOLDING_NREGS];
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static enum ThreadState
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{
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STOPPED,
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RUNNING,
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SHUTDOWN
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} ePollThreadState;
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static pthread_mutex_t xLock = PTHREAD_MUTEX_INITIALIZER;
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static BOOL bDoExit;
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/* ----------------------- Static functions ---------------------------------*/
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static BOOL bCreatePollingThread( void );
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static enum ThreadState eGetPollingThreadState( void );
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static void vSetPollingThreadState( enum ThreadState eNewState );
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static void *pvPollingThread( void *pvParameter );
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/* ----------------------- Start implementation -----------------------------*/
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BOOL
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bSetSignal( int iSignalNr, void ( *pSigHandler ) ( int ) )
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{
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BOOL bResult;
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struct sigaction xNewSig, xOldSig;
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xNewSig.sa_handler = pSigHandler;
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sigemptyset( &xNewSig.sa_mask );
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xNewSig.sa_flags = 0;
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if( sigaction( iSignalNr, &xNewSig, &xOldSig ) != 0 )
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{
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bResult = FALSE;
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}
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else
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{
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bResult = TRUE;
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}
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return bResult;
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}
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void
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vSigShutdown( int xSigNr )
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{
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switch ( xSigNr )
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{
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case SIGQUIT:
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case SIGINT:
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case SIGTERM:
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vSetPollingThreadState( SHUTDOWN );
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bDoExit = TRUE;
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}
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}
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int
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main( int argc, char *argv[] )
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{
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int iExitCode;
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CHAR cCh;
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const UCHAR ucSlaveID[] = { 0xAA, 0xBB, 0xCC };
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if( !bSetSignal( SIGQUIT, vSigShutdown ) ||
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!bSetSignal( SIGINT, vSigShutdown ) || !bSetSignal( SIGTERM, vSigShutdown ) )
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{
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fprintf( stderr, "%s: can't install signal handlers: %s!\n", PROG, strerror( errno ) );
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iExitCode = EXIT_FAILURE;
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}
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else if( eMBInit( MB_RTU, 0x0A, 0, 38400, MB_PAR_EVEN ) != MB_ENOERR )
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{
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fprintf( stderr, "%s: can't initialize modbus stack!\n", PROG );
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iExitCode = EXIT_FAILURE;
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}
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else if( eMBSetSlaveID( 0x34, TRUE, ucSlaveID, 3 ) != MB_ENOERR )
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{
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fprintf( stderr, "%s: can't set slave id!\n", PROG );
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iExitCode = EXIT_FAILURE;
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}
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else
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{
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vSetPollingThreadState( STOPPED );
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/* CLI interface. */
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printf( "Type 'q' for quit or 'h' for help!\n" );
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bDoExit = FALSE;
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do
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{
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printf( "> " );
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cCh = getchar( );
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switch ( cCh )
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{
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case 'q':
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bDoExit = TRUE;
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break;
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case 'd':
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vSetPollingThreadState( SHUTDOWN );
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break;
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case 'e':
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if( bCreatePollingThread( ) != TRUE )
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{
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printf( "Can't start protocol stack! Already running?\n" );
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}
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break;
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case 's':
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switch ( eGetPollingThreadState( ) )
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{
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case RUNNING:
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printf( "Protocol stack is running.\n" );
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break;
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case STOPPED:
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printf( "Protocol stack is stopped.\n" );
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break;
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case SHUTDOWN:
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printf( "Protocol stack is shuting down.\n" );
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break;
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}
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break;
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case 'h':
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printf( "FreeModbus demo application help:\n" );
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printf( " 'd' ... disable protocol stack.\n" );
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printf( " 'e' ... enabled the protocol stack.\n" );
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printf( " 's' ... show current status.\n" );
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printf( " 'q' ... quit application.\n" );
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printf( " 'h' ... this information.\n" );
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printf( "\n" );
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printf( "Copyright 2006 Christian Walter <wolti@sil.at>\n" );
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break;
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default:
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if( !bDoExit && ( cCh != '\n' ) )
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{
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printf( "illegal command '%c'!\n", cCh );
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}
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break;
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}
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/* eat up everything untill return character. */
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while( !bDoExit && ( cCh != '\n' ) )
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{
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cCh = getchar( );
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}
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}
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while( !bDoExit );
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/* Release hardware resources. */
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( void )eMBClose( );
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iExitCode = EXIT_SUCCESS;
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}
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return iExitCode;
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}
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BOOL
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bCreatePollingThread( void )
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{
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BOOL bResult;
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pthread_t xThread;
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if( eGetPollingThreadState( ) == STOPPED )
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{
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if( pthread_create( &xThread, NULL, pvPollingThread, NULL ) != 0 )
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{
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bResult = FALSE;
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}
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else
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{
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bResult = TRUE;
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}
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}
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else
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{
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bResult = FALSE;
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}
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return bResult;
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}
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void *
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pvPollingThread( void *pvParameter )
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{
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vSetPollingThreadState( RUNNING );
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if( eMBEnable( ) == MB_ENOERR )
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{
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do
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{
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if( eMBPoll( ) != MB_ENOERR )
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break;
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usRegInputBuf[0] = ( USHORT ) rand( );
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}
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while( eGetPollingThreadState( ) != SHUTDOWN );
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}
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( void )eMBDisable( );
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vSetPollingThreadState( STOPPED );
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return 0;
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}
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enum ThreadState
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eGetPollingThreadState( )
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{
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enum ThreadState eCurState;
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( void )pthread_mutex_lock( &xLock );
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eCurState = ePollThreadState;
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( void )pthread_mutex_unlock( &xLock );
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return eCurState;
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}
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void
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vSetPollingThreadState( enum ThreadState eNewState )
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{
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( void )pthread_mutex_lock( &xLock );
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ePollThreadState = eNewState;
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( void )pthread_mutex_unlock( &xLock );
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}
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eMBErrorCode
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eMBRegInputCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNRegs )
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{
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eMBErrorCode eStatus = MB_ENOERR;
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int iRegIndex;
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if( ( usAddress >= REG_INPUT_START )
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&& ( usAddress + usNRegs <= REG_INPUT_START + REG_INPUT_NREGS ) )
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{
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iRegIndex = ( int )( usAddress - usRegInputStart );
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while( usNRegs > 0 )
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{
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*pucRegBuffer++ = ( unsigned char )( usRegInputBuf[iRegIndex] >> 8 );
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*pucRegBuffer++ = ( unsigned char )( usRegInputBuf[iRegIndex] & 0xFF );
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iRegIndex++;
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usNRegs--;
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}
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}
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else
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{
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eStatus = MB_ENOREG;
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}
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return eStatus;
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}
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eMBErrorCode
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eMBRegHoldingCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNRegs, eMBRegisterMode eMode )
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{
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eMBErrorCode eStatus = MB_ENOERR;
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int iRegIndex;
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if( ( usAddress >= REG_HOLDING_START ) &&
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( usAddress + usNRegs <= REG_HOLDING_START + REG_HOLDING_NREGS ) )
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{
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iRegIndex = ( int )( usAddress - usRegHoldingStart );
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switch ( eMode )
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{
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/* Pass current register values to the protocol stack. */
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case MB_REG_READ:
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while( usNRegs > 0 )
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{
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*pucRegBuffer++ = ( UCHAR ) ( usRegHoldingBuf[iRegIndex] >> 8 );
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*pucRegBuffer++ = ( UCHAR ) ( usRegHoldingBuf[iRegIndex] & 0xFF );
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iRegIndex++;
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usNRegs--;
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}
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break;
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/* Update current register values with new values from the
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* protocol stack. */
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case MB_REG_WRITE:
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while( usNRegs > 0 )
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{
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usRegHoldingBuf[iRegIndex] = *pucRegBuffer++ << 8;
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usRegHoldingBuf[iRegIndex] |= *pucRegBuffer++;
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iRegIndex++;
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usNRegs--;
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}
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}
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}
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else
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{
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eStatus = MB_ENOREG;
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}
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return eStatus;
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}
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eMBErrorCode
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eMBRegCoilsCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNCoils, eMBRegisterMode eMode )
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{
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return MB_ENOREG;
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}
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eMBErrorCode
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eMBRegDiscreteCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNDiscrete )
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{
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return MB_ENOREG;
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}
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