demo.c

modbus开发程序包

/*
 * FreeModbus Libary: MCF5235 Demo Application
 * Copyright (c) 2007 Christian Walter <[e-mail]>
 * All rights reserved.
 *
 * 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. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 *
 * File: $Id: demo.c,v 1.1 2007/02/19 00:56:13 wolti Exp $
 */

/* ------------------------ System includes ------------------------------- */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>

/* ------------------------ FreeRTOS includes ----------------------------- */
#include "FreeRTOS.h"
#include "task.h"

/* ------------------------ FreeModbus includes --------------------------- */
#include "mb.h"

/* ------------------------ Project includes ------------------------------ */
#include "mcf5xxx.h"
#include "mcf523x.h"
#include "m523xbcc.h"

/* ------------------------ Defines ------------------------------------------*/
#define REG_INPUT_START 1000
#define REG_INPUT_NREGS 4

/* ----------------------- Static variables ---------------------------------*/
static USHORT   usRegInputStart = REG_INPUT_START;
static USHORT   usRegInputBuf[REG_INPUT_NREGS];

/* ----------------------- Static functions ---------------------------------*/
static void     vModbusTask( void *pvParameters );
static void     vTestTask( void *pvParameters );

/* ------------------------ Implementation -------------------------------- */
void
main( void )
{
    ( void )xTaskCreate( vModbusTask, NULL, configMINIMAL_STACK_SIZE, NULL,
                         tskIDLE_PRIORITY, NULL );
    /* Now all the tasks have been started - start the scheduler. */

    vTaskStartScheduler(  );
}

static void
vModbusTask( void *pvParameters )
{
    ( void )pvParameters;

    /* Select either ASCII or RTU Mode. */
    ( void )eMBInit( MB_RTU, 0x0A, 0, 38400, MB_PAR_EVEN );

    /* Enable the Modbus Protocol Stack. */
    ( void )eMBEnable(  );

    /* Enter main loop. */
    for( ;; )
    {
        /* Call the main polling loop of the Modbus protocol stack. */
        ( void )eMBPoll(  );
    }
}

eMBErrorCode
eMBRegInputCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNRegs )
{
    eMBErrorCode    eStatus = MB_ENOERR;
    int             iRegIndex;

    if( ( usAddress >= REG_INPUT_START )
        && ( usAddress + usNRegs <= REG_INPUT_START + REG_INPUT_NREGS ) )
    {
        iRegIndex = ( int )( usAddress - usRegInputStart );
        while( usNRegs > 0 )
        {
            *pucRegBuffer++ = ( unsigned char )( usRegInputBuf[iRegIndex] >> 8 );
            *pucRegBuffer++ = ( unsigned char )( usRegInputBuf[iRegIndex] & 0xFF );
            iRegIndex++;
            usNRegs--;
        }
    }
    else
    {
        eStatus = MB_ENOREG;
    }

    return eStatus;
}

eMBErrorCode
eMBRegHoldingCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNRegs, eMBRegisterMode eMode )
{
    ( void )pucRegBuffer;
    ( void )usAddress;
    ( void )usNRegs;
    ( void )eMode;
    return MB_ENOREG;
}


eMBErrorCode
eMBRegCoilsCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNCoils, eMBRegisterMode eMode )
{
    ( void )pucRegBuffer;
    ( void )usAddress;
    ( void )usNCoils;
    ( void )eMode;
    return MB_ENOREG;
}

eMBErrorCode
eMBRegDiscreteCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNDiscrete )
{
    ( void )pucRegBuffer;
    ( void )usAddress;
    ( void )usNDiscrete;
    return MB_ENOREG;
}