/**************************************************************************** * apps/modbus/functions/mbfuncholding_m.c * * FreeModbus Library: 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. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include "port.h" #include "modbus/mb.h" #include "modbus/mb_m.h" #include "modbus/mbframe.h" #include "modbus/mbproto.h" /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ #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) /**************************************************************************** * Public Function Prototypes ****************************************************************************/ eMBException prveMBError2Exception(eMBErrorCode eErrorCode); /**************************************************************************** * Public Functions ****************************************************************************/ #if defined(CONFIG_MB_RTU_MASTER) || defined(CONFIG_MB_ASCII_MASTER) /**************************************************************************** * Description: * This function will request write holding register. * * Input Parameters: * ucSndAddr salve address * usRegAddr register start address * usRegData register data to be written * lTimeOut timeout (-1 will waiting forever) * * Returned Value: * error code * ****************************************************************************/ #ifdef CONFIG_MB_MASTER_FUNC_WRITE_HOLDING_ENABLED eMBMasterReqErrCode eMBMasterReqWriteHoldingRegister(uint8_t ucSndAddr, uint16_t usRegAddr, uint16_t usRegData, uint32_t lTimeOut) { uint8_t *ucMBFrame; eMBMasterReqErrCode eErrStatus = MB_MRE_NO_ERR; if (ucSndAddr > CONFIG_MB_MASTER_TOTAL_SLAVE_NUM) { eErrStatus = MB_MRE_ILL_ARG; } else if (xMBMasterRunResTake(lTimeOut) == false) { eErrStatus = MB_MRE_MASTER_BUSY; } 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); eErrStatus = eMBMasterWaitRequestFinish(); } return eErrStatus; } eMBException eMBMasterFuncWriteHoldingRegister(uint8_t *pucFrame, uint16_t *usLen) { uint16_t usRegAddress; eMBException eStatus = MB_EX_NONE; eMBErrorCode eRegStatus; if (*usLen == (MB_PDU_SIZE_MIN + MB_PDU_FUNC_WRITE_SIZE)) { usRegAddress = (uint16_t) (pucFrame[MB_PDU_FUNC_WRITE_ADDR_OFF] << 8); usRegAddress |= (uint16_t) (pucFrame[MB_PDU_FUNC_WRITE_ADDR_OFF + 1]); usRegAddress++; /* Make callback to update the value. */ eRegStatus = eMBMasterRegHoldingCB(&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 /**************************************************************************** * This function will request write multiple holding register. * * Input Parameters: * ucSndAddr salve address * usRegAddr register start address * usNRegs register total number * pusDataBuffer data to be written * lTimeOut timeout (-1 will waiting forever) * * Returned Value: * error code * ****************************************************************************/ #ifdef CONFIG_MB_MASTER_FUNC_WRITE_MULTIPLE_HOLDING_ENABLED eMBMasterReqErrCode eMBMasterReqWriteMultipleHoldingRegister(uint8_t ucSndAddr, uint16_t usRegAddr, uint16_t usNRegs, uint16_t *pusDataBuffer, uint32_t lTimeOut) { uint8_t *ucMBFrame; uint16_t usRegIndex = 0; eMBMasterReqErrCode eErrStatus = MB_MRE_NO_ERR; if (ucSndAddr > CONFIG_MB_MASTER_TOTAL_SLAVE_NUM) { eErrStatus = MB_MRE_ILL_ARG; } else if (xMBMasterRunResTake(lTimeOut) == false) { eErrStatus = MB_MRE_MASTER_BUSY; } 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); eErrStatus = eMBMasterWaitRequestFinish(); } return eErrStatus; } eMBException eMBMasterFuncWriteMultipleHoldingRegister(uint8_t *pucFrame, uint16_t *usLen) { uint8_t *ucMBFrame; uint16_t usRegAddress; uint16_t usRegCount; uint8_t ucRegByteCount; eMBException eStatus = MB_EX_NONE; eMBErrorCode eRegStatus; /* If this request is broadcast, the *usLen is not need check. */ if ((*usLen == MB_PDU_SIZE_MIN + MB_PDU_FUNC_WRITE_MUL_SIZE) || xMBMasterRequestIsBroadcast()) { vMBMasterGetPDUSndBuf(&ucMBFrame); usRegAddress = (uint16_t) (ucMBFrame[MB_PDU_REQ_WRITE_MUL_ADDR_OFF] << 8); usRegAddress |= (uint16_t) (ucMBFrame[MB_PDU_REQ_WRITE_MUL_ADDR_OFF + 1]); usRegAddress++; usRegCount = (uint16_t) (ucMBFrame[MB_PDU_REQ_WRITE_MUL_REGCNT_OFF] << 8); usRegCount |= (uint16_t) (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 = eMBMasterRegHoldingCB(&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 /**************************************************************************** * This function will request read holding register. * * Input Parameters: * ucSndAddr salve address * usRegAddr register start address * usNRegs register total number * lTimeOut timeout (-1 will waiting forever) * * Returned Value: * error code * ****************************************************************************/ #ifdef CONFIG_MB_MASTER_FUNC_READ_HOLDING_ENABLED eMBMasterReqErrCode eMBMasterReqReadHoldingRegister(uint8_t ucSndAddr, uint16_t usRegAddr, uint16_t usNRegs, uint32_t lTimeOut) { uint8_t *ucMBFrame; eMBMasterReqErrCode eErrStatus = MB_MRE_NO_ERR; if (ucSndAddr > CONFIG_MB_MASTER_TOTAL_SLAVE_NUM) { eErrStatus = MB_MRE_ILL_ARG; } else if (xMBMasterRunResTake(lTimeOut) == false) { eErrStatus = MB_MRE_MASTER_BUSY; } 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); eErrStatus = eMBMasterWaitRequestFinish(); } return eErrStatus; } eMBException eMBMasterFuncReadHoldingRegister(uint8_t *pucFrame, uint16_t *usLen) { uint8_t *ucMBFrame; uint16_t usRegAddress; uint16_t usRegCount; eMBException eStatus = MB_EX_NONE; eMBErrorCode eRegStatus; /* If this request is broadcast, and it's read mode. This request don't need * execute. */ if (xMBMasterRequestIsBroadcast()) { eStatus = MB_EX_NONE; } else if (*usLen >= MB_PDU_SIZE_MIN + MB_PDU_FUNC_READ_SIZE_MIN) { vMBMasterGetPDUSndBuf(&ucMBFrame); usRegAddress = (uint16_t) (ucMBFrame[MB_PDU_REQ_READ_ADDR_OFF] << 8); usRegAddress |= (uint16_t) (ucMBFrame[MB_PDU_REQ_READ_ADDR_OFF + 1]); usRegAddress++; usRegCount = (uint16_t) (ucMBFrame[MB_PDU_REQ_READ_REGCNT_OFF] << 8); usRegCount |= (uint16_t) (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 = eMBMasterRegHoldingCB(&pucFrame[MB_PDU_FUNC_READ_VALUES_OFF], usRegAddress, usRegCount, MB_REG_READ); /* If an error occurred 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 /**************************************************************************** * Description: * This function will request read and write holding register. * * Input Parameters: * ucSndAddr salve address * usReadRegAddr read register start address * usNReadRegs read register total number * pusDataBuffer data to be written * usWriteRegAddr write register start address * usNWriteRegs write register total number * lTimeOut timeout (-1 will waiting forever) * * Returned Value: * error code * ****************************************************************************/ #ifdef CONFIG_MB_MASTER_FUNC_READWRITE_HOLDING_ENABLED eMBMasterReqErrCode eMBMasterReqReadWriteMultipleHoldingRegister(uint8_t ucSndAddr, uint16_t usReadRegAddr, uint16_t usNReadRegs, uint16_t *pusDataBuffer, uint16_t usWriteRegAddr, uint16_t usNWriteRegs, uint32_t lTimeOut) { uint8_t *ucMBFrame; uint16_t usRegIndex = 0; eMBMasterReqErrCode eErrStatus = MB_MRE_NO_ERR; if (ucSndAddr > CONFIG_MB_MASTER_TOTAL_SLAVE_NUM) { eErrStatus = MB_MRE_ILL_ARG; } else if (xMBMasterRunResTake(lTimeOut) == false) { eErrStatus = MB_MRE_MASTER_BUSY; } 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); eErrStatus = eMBMasterWaitRequestFinish(); } return eErrStatus; } eMBException eMBMasterFuncReadWriteMultipleHoldingRegister(uint8_t *pucFrame, uint16_t *usLen) { uint16_t usRegReadAddress; uint16_t usRegReadCount; uint16_t usRegWriteAddress; uint16_t usRegWriteCount; uint8_t *ucMBFrame; eMBException eStatus = MB_EX_NONE; eMBErrorCode eRegStatus; /* If this request is broadcast, and it's read mode. This request don't need * execute. */ if (xMBMasterRequestIsBroadcast()) { eStatus = MB_EX_NONE; } else if (*usLen >= MB_PDU_SIZE_MIN + MB_PDU_FUNC_READWRITE_SIZE_MIN) { vMBMasterGetPDUSndBuf(&ucMBFrame); usRegReadAddress = (uint16_t) (ucMBFrame[MB_PDU_REQ_READWRITE_READ_ADDR_OFF] << 8U); usRegReadAddress |= (uint16_t) (ucMBFrame[MB_PDU_REQ_READWRITE_READ_ADDR_OFF + 1]); usRegReadAddress++; usRegReadCount = (uint16_t) (ucMBFrame[MB_PDU_REQ_READWRITE_READ_REGCNT_OFF] << 8U); usRegReadCount |= (uint16_t) (ucMBFrame[MB_PDU_REQ_READWRITE_READ_REGCNT_OFF + 1]); usRegWriteAddress = (uint16_t) (ucMBFrame[MB_PDU_REQ_READWRITE_WRITE_ADDR_OFF] << 8U); usRegWriteAddress |= (uint16_t) (ucMBFrame[MB_PDU_REQ_READWRITE_WRITE_ADDR_OFF + 1]); usRegWriteAddress++; usRegWriteCount = (uint16_t) (ucMBFrame[MB_PDU_REQ_READWRITE_WRITE_REGCNT_OFF] << 8U); usRegWriteCount |= (uint16_t) (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 = eMBMasterRegHoldingCB(&ucMBFrame [MB_PDU_REQ_READWRITE_WRITE_VALUES_OFF], usRegWriteAddress, usRegWriteCount, MB_REG_WRITE); if (eRegStatus == MB_ENOERR) { /* Make the read callback. */ eRegStatus = eMBMasterRegHoldingCB(&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