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nuttx-apps/modbus/functions/mbfuncholding_m.c
Xiang Xiao 857158451b Unify the void cast usage 
1.Remove void cast for function because many place ignore the returned value witout cast
2.Replace void cast for variable with UNUSED macro

Change-Id: Ie644129a563244a6397036789c4c3ea83c4e9b09
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
2020-01-02 23:21:01 +08:00

568 lines
20 KiB
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/****************************************************************************
* apps/modbus/functions/mbfuncholding_m.c
*
* FreeModbus Library: A portable Modbus implementation for Modbus ASCII/RTU.
* Copyright (C) 2013 Armink <armink.ztl@gmail.com>
* 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 <nuttx/config.h>
#include <stdlib.h>
#include <string.h>
#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);
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);
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);
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);
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
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