/* * FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU. * Copyright (C) 2013 Armink * 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: mbfuncholding_m.c,v 1.60 2013/09/02 14:13:40 Armink Add Master Functions Exp $ */ /* ----------------------- System includes ----------------------------------*/ #include "stdlib.h" #include "string.h" /* ----------------------- Platform includes --------------------------------*/ #include "port.h" /* ----------------------- Modbus includes ----------------------------------*/ #include "mb.h" #include "mb_m.h" #include "mbframe.h" #include "mbproto.h" #include "mbconfig.h" /* ----------------------- Defines ------------------------------------------*/ #define MB_PDU_REQ_READ_ADDR_OFF ( MB_PDU_DATA_OFF + 0 ) #define MB_PDU_REQ_READ_REGCNT_OFF ( MB_PDU_DATA_OFF + 2 ) #define MB_PDU_REQ_READ_SIZE ( 4 ) #define MB_PDU_FUNC_READ_REGCNT_MAX ( 0x007D ) #define MB_PDU_FUNC_READ_BYTECNT_OFF ( MB_PDU_DATA_OFF + 0 ) #define MB_PDU_FUNC_READ_VALUES_OFF ( MB_PDU_DATA_OFF + 1 ) #define MB_PDU_FUNC_READ_SIZE_MIN ( 1 ) #define MB_PDU_REQ_WRITE_ADDR_OFF ( MB_PDU_DATA_OFF + 0) #define MB_PDU_REQ_WRITE_VALUE_OFF ( MB_PDU_DATA_OFF + 2 ) #define MB_PDU_REQ_WRITE_SIZE ( 4 ) #define MB_PDU_FUNC_WRITE_ADDR_OFF ( MB_PDU_DATA_OFF + 0) #define MB_PDU_FUNC_WRITE_VALUE_OFF ( MB_PDU_DATA_OFF + 2 ) #define MB_PDU_FUNC_WRITE_SIZE ( 4 ) #define MB_PDU_REQ_WRITE_MUL_ADDR_OFF ( MB_PDU_DATA_OFF + 0 ) #define MB_PDU_REQ_WRITE_MUL_REGCNT_OFF ( MB_PDU_DATA_OFF + 2 ) #define MB_PDU_REQ_WRITE_MUL_BYTECNT_OFF ( MB_PDU_DATA_OFF + 4 ) #define MB_PDU_REQ_WRITE_MUL_VALUES_OFF ( MB_PDU_DATA_OFF + 5 ) #define MB_PDU_REQ_WRITE_MUL_SIZE_MIN ( 5 ) #define MB_PDU_REQ_WRITE_MUL_REGCNT_MAX ( 0x0078 ) #define MB_PDU_FUNC_WRITE_MUL_ADDR_OFF ( MB_PDU_DATA_OFF + 0 ) #define MB_PDU_FUNC_WRITE_MUL_REGCNT_OFF ( MB_PDU_DATA_OFF + 2 ) #define MB_PDU_FUNC_WRITE_MUL_SIZE ( 4 ) #define MB_PDU_REQ_READWRITE_READ_ADDR_OFF ( MB_PDU_DATA_OFF + 0 ) #define MB_PDU_REQ_READWRITE_READ_REGCNT_OFF ( MB_PDU_DATA_OFF + 2 ) #define MB_PDU_REQ_READWRITE_WRITE_ADDR_OFF ( MB_PDU_DATA_OFF + 4 ) #define MB_PDU_REQ_READWRITE_WRITE_REGCNT_OFF ( MB_PDU_DATA_OFF + 6 ) #define MB_PDU_REQ_READWRITE_WRITE_BYTECNT_OFF ( MB_PDU_DATA_OFF + 8 ) #define MB_PDU_REQ_READWRITE_WRITE_VALUES_OFF ( MB_PDU_DATA_OFF + 9 ) #define MB_PDU_REQ_READWRITE_SIZE_MIN ( 9 ) #define MB_PDU_FUNC_READWRITE_READ_BYTECNT_OFF ( MB_PDU_DATA_OFF + 0 ) #define MB_PDU_FUNC_READWRITE_READ_VALUES_OFF ( MB_PDU_DATA_OFF + 1 ) #define MB_PDU_FUNC_READWRITE_SIZE_MIN ( 1 ) /* ----------------------- Static functions ---------------------------------*/ eMBException prveMBError2Exception( eMBErrorCode eErrorCode ); /* ----------------------- Start implementation -----------------------------*/ #if MB_MASTER_RTU_ENABLED > 0 || MB_MASTER_ASCII_ENABLED > 0 #if MB_FUNC_WRITE_HOLDING_ENABLED > 0 eMBMasterReqErrCode eMBMasterReqWriteHoldingRegister( UCHAR ucSndAddr, USHORT usRegAddr, USHORT usRegData ) { UCHAR *ucMBFrame; eMBMasterReqErrCode eErrStatus = MB_MRE_NO_ERR; if ( xMBMasterGetIsBusy() ) eErrStatus = MB_MRE_MASTER_BUSY; else if ( ucSndAddr > MB_MASTER_TOTAL_SLAVE_NUM ) eErrStatus = MB_MRE_ILL_ARG; else { vMBMasterGetPDUSndBuf(&ucMBFrame); vMBMasterSetDestAddress(ucSndAddr); ucMBFrame[MB_PDU_FUNC_OFF] = MB_FUNC_WRITE_REGISTER; ucMBFrame[MB_PDU_REQ_WRITE_ADDR_OFF] = usRegAddr >> 8; ucMBFrame[MB_PDU_REQ_WRITE_ADDR_OFF + 1] = usRegAddr; ucMBFrame[MB_PDU_REQ_WRITE_VALUE_OFF] = usRegData >> 8; ucMBFrame[MB_PDU_REQ_WRITE_VALUE_OFF + 1] = usRegData ; vMBMasterSetPDUSndLength( MB_PDU_SIZE_MIN + MB_PDU_REQ_WRITE_SIZE ); ( void ) xMBMasterPortEventPost( EV_MASTER_FRAME_SENT ); } return eErrStatus; } eMBException eMBMasterFuncWriteHoldingRegister( UCHAR * pucFrame, USHORT * usLen ) { USHORT usRegAddress; eMBException eStatus = MB_EX_NONE; eMBErrorCode eRegStatus; if( *usLen == ( MB_PDU_SIZE_MIN + MB_PDU_FUNC_WRITE_SIZE ) ) { usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_ADDR_OFF] << 8 ); usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_ADDR_OFF + 1] ); usRegAddress++; /* Make callback to update the value. */ eRegStatus = eMBRegHoldingCB( &pucFrame[MB_PDU_FUNC_WRITE_VALUE_OFF], usRegAddress, 1, MB_REG_WRITE ); /* If an error occured convert it into a Modbus exception. */ if( eRegStatus != MB_ENOERR ) { eStatus = prveMBError2Exception( eRegStatus ); } } else { /* Can't be a valid request because the length is incorrect. */ eStatus = MB_EX_ILLEGAL_DATA_VALUE; } return eStatus; } #endif #if MB_FUNC_WRITE_MULTIPLE_HOLDING_ENABLED > 0 eMBMasterReqErrCode eMBMasterReqWriteMultipleHoldingRegister( UCHAR ucSndAddr, USHORT usRegAddr, USHORT usNRegs, USHORT * pusDataBuffer ) { UCHAR *ucMBFrame; USHORT usRegIndex = 0; eMBMasterReqErrCode eErrStatus = MB_MRE_NO_ERR; if ( xMBMasterGetIsBusy() ) eErrStatus = MB_MRE_MASTER_BUSY; else if ( ucSndAddr > MB_MASTER_TOTAL_SLAVE_NUM ) eErrStatus = MB_MRE_ILL_ARG; else { vMBMasterGetPDUSndBuf(&ucMBFrame); vMBMasterSetDestAddress(ucSndAddr); ucMBFrame[MB_PDU_FUNC_OFF] = MB_FUNC_WRITE_MULTIPLE_REGISTERS; ucMBFrame[MB_PDU_REQ_WRITE_MUL_ADDR_OFF] = usRegAddr >> 8; ucMBFrame[MB_PDU_REQ_WRITE_MUL_ADDR_OFF + 1] = usRegAddr; ucMBFrame[MB_PDU_REQ_WRITE_MUL_REGCNT_OFF] = usNRegs >> 8; ucMBFrame[MB_PDU_REQ_WRITE_MUL_REGCNT_OFF + 1] = usNRegs ; ucMBFrame[MB_PDU_REQ_WRITE_MUL_BYTECNT_OFF] = usNRegs * 2; ucMBFrame += MB_PDU_REQ_WRITE_MUL_VALUES_OFF; while( usNRegs > usRegIndex) { *ucMBFrame++ = pusDataBuffer[usRegIndex] >> 8; *ucMBFrame++ = pusDataBuffer[usRegIndex++] ; } vMBMasterSetPDUSndLength( MB_PDU_SIZE_MIN + MB_PDU_REQ_WRITE_MUL_SIZE_MIN + 2*usNRegs ); ( void ) xMBMasterPortEventPost( EV_MASTER_FRAME_SENT ); } return eErrStatus; } eMBException eMBMasterFuncWriteMultipleHoldingRegister( UCHAR * pucFrame, USHORT * usLen ) { UCHAR *ucMBFrame; USHORT usRegAddress; USHORT usRegCount; UCHAR ucRegByteCount; eMBException eStatus = MB_EX_NONE; eMBErrorCode eRegStatus; if( *usLen == MB_PDU_SIZE_MIN + MB_PDU_FUNC_WRITE_MUL_SIZE ) { vMBMasterGetPDUSndBuf(&ucMBFrame); usRegAddress = ( USHORT )( ucMBFrame[MB_PDU_REQ_WRITE_MUL_ADDR_OFF] << 8 ); usRegAddress |= ( USHORT )( ucMBFrame[MB_PDU_REQ_WRITE_MUL_ADDR_OFF + 1] ); usRegAddress++; usRegCount = ( USHORT )( ucMBFrame[MB_PDU_REQ_WRITE_MUL_REGCNT_OFF] << 8 ); usRegCount |= ( USHORT )( ucMBFrame[MB_PDU_REQ_WRITE_MUL_REGCNT_OFF + 1] ); ucRegByteCount = ucMBFrame[MB_PDU_REQ_WRITE_MUL_BYTECNT_OFF]; if( ucRegByteCount == 2 * usRegCount ) { /* Make callback to update the register values. */ eRegStatus = eMBRegHoldingCB( &ucMBFrame[MB_PDU_REQ_WRITE_MUL_VALUES_OFF], usRegAddress, usRegCount, MB_REG_WRITE ); /* If an error occured convert it into a Modbus exception. */ if( eRegStatus != MB_ENOERR ) { eStatus = prveMBError2Exception( eRegStatus ); } } else { eStatus = MB_EX_ILLEGAL_DATA_VALUE; } } else { /* Can't be a valid request because the length is incorrect. */ eStatus = MB_EX_ILLEGAL_DATA_VALUE; } return eStatus; } #endif #if MB_FUNC_READ_HOLDING_ENABLED > 0 eMBMasterReqErrCode eMBMasterReqReadHoldingRegister( UCHAR ucSndAddr, USHORT usRegAddr, USHORT usNRegs ) { UCHAR *ucMBFrame; eMBMasterReqErrCode eErrStatus = MB_MRE_NO_ERR; if ( xMBMasterGetIsBusy() ) eErrStatus = MB_MRE_MASTER_BUSY; else if ( ucSndAddr > MB_MASTER_TOTAL_SLAVE_NUM ) eErrStatus = MB_MRE_ILL_ARG; else { vMBMasterGetPDUSndBuf(&ucMBFrame); vMBMasterSetDestAddress(ucSndAddr); ucMBFrame[MB_PDU_FUNC_OFF] = MB_FUNC_READ_HOLDING_REGISTER; ucMBFrame[MB_PDU_REQ_READ_ADDR_OFF] = usRegAddr >> 8; ucMBFrame[MB_PDU_REQ_READ_ADDR_OFF + 1] = usRegAddr; ucMBFrame[MB_PDU_REQ_READ_REGCNT_OFF] = usNRegs >> 8; ucMBFrame[MB_PDU_REQ_READ_REGCNT_OFF + 1] = usNRegs; vMBMasterSetPDUSndLength( MB_PDU_SIZE_MIN + MB_PDU_REQ_READ_SIZE ); ( void ) xMBMasterPortEventPost( EV_MASTER_FRAME_SENT ); } return eErrStatus; } eMBException eMBMasterFuncReadHoldingRegister( UCHAR * pucFrame, USHORT * usLen ) { UCHAR *ucMBFrame; USHORT usRegAddress; USHORT usRegCount; eMBException eStatus = MB_EX_NONE; eMBErrorCode eRegStatus; if( *usLen >= MB_PDU_SIZE_MIN + MB_PDU_FUNC_READ_SIZE_MIN ) { vMBMasterGetPDUSndBuf(&ucMBFrame); usRegAddress = ( USHORT )( ucMBFrame[MB_PDU_REQ_READ_ADDR_OFF] << 8 ); usRegAddress |= ( USHORT )( ucMBFrame[MB_PDU_REQ_READ_ADDR_OFF + 1] ); usRegAddress++; usRegCount = ( USHORT )( ucMBFrame[MB_PDU_REQ_READ_REGCNT_OFF] << 8 ); usRegCount = ( USHORT )( ucMBFrame[MB_PDU_REQ_READ_REGCNT_OFF + 1] ); /* Check if the number of registers to read is valid. If not * return Modbus illegal data value exception. */ if( ( usRegCount >= 1 ) && ( 2 * usRegCount == pucFrame[MB_PDU_FUNC_READ_BYTECNT_OFF] ) ) { /* Make callback to fill the buffer. */ eRegStatus = eMBRegHoldingCB( &pucFrame[MB_PDU_FUNC_READ_VALUES_OFF], usRegAddress, usRegCount, MB_REG_READ ); /* If an error occured convert it into a Modbus exception. */ if( eRegStatus != MB_ENOERR ) { eStatus = prveMBError2Exception( eRegStatus ); } } else { eStatus = MB_EX_ILLEGAL_DATA_VALUE; } } else { /* Can't be a valid request because the length is incorrect. */ eStatus = MB_EX_ILLEGAL_DATA_VALUE; } return eStatus; } #endif #if MB_FUNC_READWRITE_HOLDING_ENABLED > 0 eMBMasterReqErrCode eMBMasterReqReadWriteMultipleHoldingRegister( UCHAR ucSndAddr, USHORT usReadRegAddr, USHORT usNReadRegs, USHORT * pusDataBuffer, USHORT usWriteRegAddr, USHORT usNWriteRegs ) { UCHAR *ucMBFrame; USHORT usRegIndex = 0; eMBMasterReqErrCode eErrStatus = MB_MRE_NO_ERR; if ( xMBMasterGetIsBusy() ) eErrStatus = MB_MRE_MASTER_BUSY; else if ( ucSndAddr > MB_MASTER_TOTAL_SLAVE_NUM ) eErrStatus = MB_MRE_ILL_ARG; else { vMBMasterGetPDUSndBuf(&ucMBFrame); vMBMasterSetDestAddress(ucSndAddr); ucMBFrame[MB_PDU_FUNC_OFF] = MB_FUNC_READWRITE_MULTIPLE_REGISTERS; ucMBFrame[MB_PDU_REQ_READWRITE_READ_ADDR_OFF] = usReadRegAddr >> 8; ucMBFrame[MB_PDU_REQ_READWRITE_READ_ADDR_OFF + 1] = usReadRegAddr; ucMBFrame[MB_PDU_REQ_READWRITE_READ_REGCNT_OFF] = usNReadRegs >> 8; ucMBFrame[MB_PDU_REQ_READWRITE_READ_REGCNT_OFF + 1] = usNReadRegs ; ucMBFrame[MB_PDU_REQ_READWRITE_WRITE_ADDR_OFF] = usWriteRegAddr >> 8; ucMBFrame[MB_PDU_REQ_READWRITE_WRITE_ADDR_OFF + 1] = usWriteRegAddr; ucMBFrame[MB_PDU_REQ_READWRITE_WRITE_REGCNT_OFF] = usNWriteRegs >> 8; ucMBFrame[MB_PDU_REQ_READWRITE_WRITE_REGCNT_OFF + 1] = usNWriteRegs ; ucMBFrame[MB_PDU_REQ_READWRITE_WRITE_BYTECNT_OFF] = usNWriteRegs * 2; ucMBFrame += MB_PDU_REQ_READWRITE_WRITE_VALUES_OFF; while( usNWriteRegs > usRegIndex) { *ucMBFrame++ = pusDataBuffer[usRegIndex] >> 8; *ucMBFrame++ = pusDataBuffer[usRegIndex++] ; } vMBMasterSetPDUSndLength( MB_PDU_SIZE_MIN + MB_PDU_REQ_READWRITE_SIZE_MIN + 2*usNWriteRegs ); ( void ) xMBMasterPortEventPost( EV_MASTER_FRAME_SENT ); } return eErrStatus; } eMBException eMBMasterFuncReadWriteMultipleHoldingRegister( UCHAR * pucFrame, USHORT * usLen ) { USHORT usRegReadAddress; USHORT usRegReadCount; USHORT usRegWriteAddress; USHORT usRegWriteCount; UCHAR *ucMBFrame; eMBException eStatus = MB_EX_NONE; eMBErrorCode eRegStatus; if( *usLen >= MB_PDU_SIZE_MIN + MB_PDU_FUNC_READWRITE_SIZE_MIN) { vMBMasterGetPDUSndBuf(&ucMBFrame); usRegReadAddress = ( USHORT )( ucMBFrame[MB_PDU_REQ_READWRITE_READ_ADDR_OFF] << 8U ); usRegReadAddress |= ( USHORT )( ucMBFrame[MB_PDU_REQ_READWRITE_READ_ADDR_OFF + 1] ); usRegReadAddress++; usRegReadCount = ( USHORT )( ucMBFrame[MB_PDU_REQ_READWRITE_READ_REGCNT_OFF] << 8U ); usRegReadCount |= ( USHORT )( ucMBFrame[MB_PDU_REQ_READWRITE_READ_REGCNT_OFF + 1] ); usRegWriteAddress = ( USHORT )( ucMBFrame[MB_PDU_REQ_READWRITE_WRITE_ADDR_OFF] << 8U ); usRegWriteAddress |= ( USHORT )( ucMBFrame[MB_PDU_REQ_READWRITE_WRITE_ADDR_OFF + 1] ); usRegWriteAddress++; usRegWriteCount = ( USHORT )( ucMBFrame[MB_PDU_REQ_READWRITE_WRITE_REGCNT_OFF] << 8U ); usRegWriteCount |= ( USHORT )( ucMBFrame[MB_PDU_REQ_READWRITE_WRITE_REGCNT_OFF + 1] ); if( ( 2 * usRegReadCount ) == pucFrame[MB_PDU_FUNC_READWRITE_READ_BYTECNT_OFF] ) { /* Make callback to update the register values. */ eRegStatus = eMBRegHoldingCB( &ucMBFrame[MB_PDU_REQ_READWRITE_WRITE_VALUES_OFF], usRegWriteAddress, usRegWriteCount, MB_REG_WRITE ); if( eRegStatus == MB_ENOERR ) { /* Make the read callback. */ eRegStatus = eMBRegHoldingCB(&pucFrame[MB_PDU_FUNC_READWRITE_READ_VALUES_OFF], usRegReadAddress, usRegReadCount, MB_REG_READ); } if( eRegStatus != MB_ENOERR ) { eStatus = prveMBError2Exception( eRegStatus ); } } else { eStatus = MB_EX_ILLEGAL_DATA_VALUE; } } return eStatus; } #endif #endif