eMBException eMBFuncWriteHoldingRegister( uint8_t * pucFrame, uint16_t * usLen ) { uint16_t usRegAddress; eMBException eStatus = MB_EX_NONE; eMBErrorCode eRegStatus; if( *usLen == ( MB_PDU_FUNC_WRITE_SIZE + MB_PDU_SIZE_MIN ) ) { 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 = 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; }
eMBException eMBFuncReadHoldingRegister( uint8_t * pucFrame, uint16_t * usLen ) { uint16_t usRegAddress; uint16_t usRegCount; uint8_t *pucFrameCur; eMBException eStatus = MB_EX_NONE; eMBErrorCode eRegStatus; if( *usLen == ( MB_PDU_FUNC_READ_SIZE + MB_PDU_SIZE_MIN ) ) { usRegAddress = ( uint16_t )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF] << 8 ); usRegAddress |= ( uint16_t )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF + 1] ); usRegAddress++; usRegCount = ( uint16_t )( pucFrame[MB_PDU_FUNC_READ_REGCNT_OFF] << 8 ); usRegCount = ( uint16_t )( pucFrame[MB_PDU_FUNC_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 ) && ( usRegCount <= MB_PDU_FUNC_READ_REGCNT_MAX ) ) { /* Set the current PDU data pointer to the beginning. */ pucFrameCur = &pucFrame[MB_PDU_FUNC_OFF]; *usLen = MB_PDU_FUNC_OFF; /* First byte contains the function code. */ *pucFrameCur++ = MB_FUNC_READ_HOLDING_REGISTER; *usLen += 1; /* Second byte in the response contain the number of bytes. */ *pucFrameCur++ = ( uint8_t ) ( usRegCount * 2 ); *usLen += 1; /* Make callback to fill the buffer. */ eRegStatus = eMBRegHoldingCB( pucFrameCur, usRegAddress, usRegCount, MB_REG_READ ); /* If an error occured convert it into a Modbus exception. */ if( eRegStatus != MB_ENOERR ) { eStatus = prveMBError2Exception( eRegStatus ); } else { *usLen += usRegCount * 2; } } 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; }
eMBException eMBMasterFuncWriteMultipleCoils( UCHAR * pucFrame, USHORT * usLen ) { USHORT usRegAddress; USHORT usCoilCnt; UCHAR ucByteCount; UCHAR ucByteCountVerify; UCHAR *ucMBFrame; eMBException eStatus = MB_EX_NONE; eMBErrorCode eRegStatus; /* If this request is broadcast, the *usLen is not need check. */ if( ( *usLen == MB_PDU_FUNC_WRITE_MUL_SIZE ) || xMBMasterRequestIsBroadcast() ) { vMBMasterGetPDUSndBuf(&ucMBFrame); usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_ADDR_OFF] << 8 ); usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_ADDR_OFF + 1] ); usRegAddress++; usCoilCnt = ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_COILCNT_OFF] << 8 ); usCoilCnt |= ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_COILCNT_OFF + 1] ); ucByteCount = ucMBFrame[MB_PDU_REQ_WRITE_MUL_BYTECNT_OFF]; /* Compute the number of expected bytes in the request. */ if( ( usCoilCnt & 0x0007 ) != 0 ) { ucByteCountVerify = ( UCHAR )( usCoilCnt / 8 + 1 ); } else { ucByteCountVerify = ( UCHAR )( usCoilCnt / 8 ); } if( ( usCoilCnt >= 1 ) && ( ucByteCountVerify == ucByteCount ) ) { eRegStatus = eMBMasterRegCoilsCB( &ucMBFrame[MB_PDU_REQ_WRITE_MUL_VALUES_OFF], usRegAddress, usCoilCnt, 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 write coil register request because the length * is incorrect. */ eStatus = MB_EX_ILLEGAL_DATA_VALUE; } return eStatus; }
eMBException eMBFuncWriteMultipleHoldingRegister( UCHAR * pucFrame, USHORT * usLen ) { USHORT usRegAddress; USHORT usRegCount; UCHAR ucRegByteCount; eMBException eStatus = MB_EX_NONE; eMBErrorCode eRegStatus; if( *usLen >= ( MB_PDU_FUNC_WRITE_MUL_SIZE_MIN + MB_PDU_SIZE_MIN ) ) { usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_ADDR_OFF] ); usRegAddress <<= 8; usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_ADDR_OFF + 1] ); usRegAddress++; usRegCount = ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_REGCNT_OFF] ); usRegCount <<= 8; usRegCount |= ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_REGCNT_OFF + 1] ); ucRegByteCount = pucFrame[MB_PDU_FUNC_WRITE_MUL_BYTECNT_OFF]; if( ( usRegCount >= 1 ) && ( usRegCount <= MB_PDU_FUNC_WRITE_MUL_REGCNT_MAX ) && ( ucRegByteCount == ( UCHAR ) ( 2 * usRegCount ) ) ) { /* Make callback to update the register values. */ eRegStatus = eMBRegHoldingCB( &pucFrame[MB_PDU_FUNC_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 { /* The response contains the function code, the starting * address and the quantity of registers. We reuse the * old values in the buffer because they are still valid. */ *usLen = MB_PDU_FUNC_WRITE_MUL_BYTECNT_OFF; } } 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; }
eMBException eMBMasterFuncReadWriteMultipleHoldingRegister( UCHAR * pucFrame, USHORT * usLen ) { USHORT usRegReadAddress; USHORT usRegReadCount; USHORT usRegWriteAddress; USHORT usRegWriteCount; UCHAR *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 = ( 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 = 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; }
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; }
eMBException eMBMasterFuncReadHoldingRegister( UCHAR * pucFrame, USHORT * usLen ) { UCHAR *ucMBFrame; USHORT usRegAddress; USHORT 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 = ( 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 = eMBMasterRegHoldingCB( &pucFrame[MB_PDU_FUNC_READ_VALUES_OFF], usRegAddress, usRegCount, MB_REG_READ ); if(eMBMasterGetErrorType() == EV_ERROR_RESPOND_TIMEOUT) nReqTimeOut++; vMBMasterSetErrorType(EV_NO_ERROR); populate(&list_RTC, (DeviceElement){(uint32_t)ucMBMasterGetDestAddress(), "RTC", CONNECTED, nReqTimeOut, nReqs, 3, usRegAddress, usRegCount, 0, 0}); /* If an error occured convert it into a Modbus exception. */ if( eRegStatus != MB_ENOERR ) { eStatus = prveMBError2Exception( eRegStatus ); populate(&list_RTC, (DeviceElement){(uint32_t)ucMBMasterGetDestAddress(), "RTC(E)", CONNECTIONLESS, nReqTimeOut, nReqs, 3, usRegAddress, usRegCount, 0, 0}); } } else { eStatus = MB_EX_ILLEGAL_DATA_VALUE; populate(&list_RTC, (DeviceElement){(uint32_t)ucMBMasterGetDestAddress(), "RTC(IDV)", CONNECTIONLESS, nReqTimeOut, nReqs, 3, usRegAddress, usRegCount, 0, 0}); } } else { /* Can't be a valid request because the length is incorrect. */ eStatus = MB_EX_ILLEGAL_DATA_VALUE; } return eStatus; }
eMBException eMBMasterFuncWriteCoil(uint8_t *pucFrame, uint16_t *usLen) { uint16_t usRegAddress; uint8_t ucBuf[2]; eMBException eStatus = MB_EX_NONE; eMBErrorCode eRegStatus; if (*usLen == (MB_PDU_FUNC_WRITE_SIZE + MB_PDU_SIZE_MIN)) { usRegAddress = (uint16_t) (pucFrame[MB_PDU_FUNC_WRITE_ADDR_OFF] << 8); usRegAddress |= (uint16_t) (pucFrame[MB_PDU_FUNC_WRITE_ADDR_OFF + 1]); usRegAddress++; if ((pucFrame[MB_PDU_FUNC_WRITE_VALUE_OFF + 1] == 0x00) && ((pucFrame[MB_PDU_FUNC_WRITE_VALUE_OFF] == 0xFF) || (pucFrame[MB_PDU_FUNC_WRITE_VALUE_OFF] == 0x00))) { ucBuf[1] = 0; if (pucFrame[MB_PDU_FUNC_WRITE_VALUE_OFF] == 0xFF) { ucBuf[0] = 1; } else { ucBuf[0] = 0; } eRegStatus = eMBMasterRegCoilsCB(&ucBuf[0], usRegAddress, 1, 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 write coil register request because the length is * incorrect. */ eStatus = MB_EX_ILLEGAL_DATA_VALUE; } return eStatus; }
eMBException eMBMasterFuncReadInputRegister_2( UCHAR * pucFrame, USHORT * usLen ) { UCHAR *ucMBFrame; USHORT usRegAddress; USHORT 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_2() ) { eStatus = MB_EX_NONE; } else if( *usLen >= MB_PDU_SIZE_MIN + MB_PDU_FUNC_READ_SIZE_MIN ) { vMBMasterGetPDUSndBuf_2(&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 = eMBMasterRegInputCB_2( &pucFrame[MB_PDU_FUNC_READ_VALUES_OFF], usRegAddress, usRegCount ); /* 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; }
eMBException eMBFuncReadWriteMultipleHoldingRegister( uint8_t * pucFrame, uint16_t * usLen ) { uint16_t usRegReadAddress; uint16_t usRegReadCount; uint16_t usRegWriteAddress; uint16_t usRegWriteCount; uint8_t ucRegWriteByteCount; uint8_t *pucFrameCur; eMBException eStatus = MB_EX_NONE; eMBErrorCode eRegStatus; if( *usLen >= ( MB_PDU_FUNC_READWRITE_SIZE_MIN + MB_PDU_SIZE_MIN ) ) { usRegReadAddress = ( uint16_t )( pucFrame[MB_PDU_FUNC_READWRITE_READ_ADDR_OFF] << 8U ); usRegReadAddress |= ( uint16_t )( pucFrame[MB_PDU_FUNC_READWRITE_READ_ADDR_OFF + 1] ); usRegReadAddress++; usRegReadCount = ( uint16_t )( pucFrame[MB_PDU_FUNC_READWRITE_READ_REGCNT_OFF] << 8U ); usRegReadCount |= ( uint16_t )( pucFrame[MB_PDU_FUNC_READWRITE_READ_REGCNT_OFF + 1] ); usRegWriteAddress = ( uint16_t )( pucFrame[MB_PDU_FUNC_READWRITE_WRITE_ADDR_OFF] << 8U ); usRegWriteAddress |= ( uint16_t )( pucFrame[MB_PDU_FUNC_READWRITE_WRITE_ADDR_OFF + 1] ); usRegWriteAddress++; usRegWriteCount = ( uint16_t )( pucFrame[MB_PDU_FUNC_READWRITE_WRITE_REGCNT_OFF] << 8U ); usRegWriteCount |= ( uint16_t )( pucFrame[MB_PDU_FUNC_READWRITE_WRITE_REGCNT_OFF + 1] ); ucRegWriteByteCount = pucFrame[MB_PDU_FUNC_READWRITE_BYTECNT_OFF]; if( ( usRegReadCount >= 1 ) && ( usRegReadCount <= 0x7D ) && ( usRegWriteCount >= 1 ) && ( usRegWriteCount <= 0x79 ) && ( ( 2 * usRegWriteCount ) == ucRegWriteByteCount ) ) { /* Make callback to update the register values. */ eRegStatus = eMBRegHoldingCB( &pucFrame[MB_PDU_FUNC_READWRITE_WRITE_VALUES_OFF], usRegWriteAddress, usRegWriteCount, MB_REG_WRITE ); if( eRegStatus == MB_ENOERR ) { /* Set the current PDU data pointer to the beginning. */ pucFrameCur = &pucFrame[MB_PDU_FUNC_OFF]; *usLen = MB_PDU_FUNC_OFF; /* First byte contains the function code. */ *pucFrameCur++ = MB_FUNC_READWRITE_MULTIPLE_REGISTERS; *usLen += 1; /* Second byte in the response contain the number of bytes. */ *pucFrameCur++ = ( uint8_t ) ( usRegReadCount * 2 ); *usLen += 1; /* Make the read callback. */ eRegStatus = eMBRegHoldingCB( pucFrameCur, usRegReadAddress, usRegReadCount, MB_REG_READ ); if( eRegStatus == MB_ENOERR ) { *usLen += 2 * usRegReadCount; } } if( eRegStatus != MB_ENOERR ) { eStatus = prveMBError2Exception( eRegStatus ); } } else { eStatus = MB_EX_ILLEGAL_DATA_VALUE; } } return eStatus; }
eMBException eMBFuncReadInputRegister( UCHAR * pucFrame, USHORT * usLen ) { USHORT usRegAddress; USHORT usRegCount; UCHAR *pucFrameCur; eMBException eStatus = MB_EX_NONE; eMBErrorCode eRegStatus; if( *usLen == ( MB_PDU_FUNC_READ_SIZE + MB_PDU_SIZE_MIN ) ) { usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF] << 8 ); usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF + 1] ); //usRegAddress++; usRegCount = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_REGCNT_OFF] << 8 ); usRegCount |= ( USHORT )( pucFrame[MB_PDU_FUNC_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 ) && ( usRegCount < MB_PDU_FUNC_READ_REGCNT_MAX ) ) { /* Set the current PDU data pointer to the beginning. */ pucFrameCur = &pucFrame[MB_PDU_FUNC_OFF]; *usLen = MB_PDU_FUNC_OFF; /* First byte contains the function code. */ *pucFrameCur++ = MB_FUNC_READ_INPUT_REGISTER; *usLen += 1; /* Second byte in the response contain the number of bytes. */ *pucFrameCur++ = ( UCHAR )( usRegCount * 2 ); *usLen += 1; eRegStatus = eMBRegInputCB( pucFrameCur, usRegAddress, usRegCount ); /* If an error occured convert it into a Modbus exception. */ if( eRegStatus != MB_ENOERR ) { eStatus = prveMBError2Exception( eRegStatus ); } else { *usLen += usRegCount * 2; } } else { eStatus = MB_EX_ILLEGAL_DATA_VALUE; } } else { /* Can't be a valid read input register request because the length * is incorrect. */ eStatus = MB_EX_ILLEGAL_DATA_VALUE; } return eStatus; }
eMBException eMBFuncReadDiscreteInputs( uint8_t * pucFrame, uint16_t * usLen ) { uint16_t usRegAddress; uint16_t usDiscreteCnt; uint8_t ucNBytes; uint8_t *pucFrameCur; eMBException eStatus = MB_EX_NONE; eMBErrorCode eRegStatus; if( *usLen == ( MB_PDU_FUNC_READ_SIZE + MB_PDU_SIZE_MIN ) ) { usRegAddress = ( uint16_t )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF] << 8 ); usRegAddress |= ( uint16_t )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF + 1] ); usRegAddress++; usDiscreteCnt = ( uint16_t )( pucFrame[MB_PDU_FUNC_READ_DISCCNT_OFF] << 8 ); usDiscreteCnt |= ( uint16_t )( pucFrame[MB_PDU_FUNC_READ_DISCCNT_OFF + 1] ); /* Check if the number of registers to read is valid. If not * return Modbus illegal data value exception. */ if( ( usDiscreteCnt >= 1 ) && ( usDiscreteCnt < MB_PDU_FUNC_READ_DISCCNT_MAX ) ) { /* Set the current PDU data pointer to the beginning. */ pucFrameCur = &pucFrame[MB_PDU_FUNC_OFF]; *usLen = MB_PDU_FUNC_OFF; /* First byte contains the function code. */ *pucFrameCur++ = MB_FUNC_READ_DISCRETE_INPUTS; *usLen += 1; /* Test if the quantity of coils is a multiple of 8. If not last * byte is only partially field with unused coils set to zero. */ if( ( usDiscreteCnt & 0x0007 ) != 0 ) { ucNBytes = ( uint8_t ) ( usDiscreteCnt / 8 + 1 ); } else { ucNBytes = ( uint8_t ) ( usDiscreteCnt / 8 ); } *pucFrameCur++ = ucNBytes; *usLen += 1; eRegStatus = eMBRegDiscreteCB( pucFrameCur, usRegAddress, usDiscreteCnt ); /* If an error occured convert it into a Modbus exception. */ if( eRegStatus != MB_ENOERR ) { eStatus = prveMBError2Exception( eRegStatus ); } else { /* The response contains the function code, the starting address * and the quantity of registers. We reuse the old values in the * buffer because they are still valid. */ *usLen += ucNBytes;; } } else { eStatus = MB_EX_ILLEGAL_DATA_VALUE; } } else { /* Can't be a valid read coil register request because the length * is incorrect. */ eStatus = MB_EX_ILLEGAL_DATA_VALUE; } return eStatus; }
/** ----------------------------------------------------------------------------------------------------------------------- eMBFuncWriteMultipleCoils ----------------------------------------------------------------------------------------------------------------------- * Event Handler for GPI module * * @date DEC/02/2013 * @author FW_DEV_2 * @pre None * @return None ************************************************************************************************************************ */ eMBException eMBFuncWriteMultipleCoils( UCHAR * pucFrame, USHORT * usLen ) { USHORT usRegAddress; USHORT usCoilCnt; UCHAR ucByteCount; UCHAR ucByteCountVerify; eMBException eStatus = MB_EX_NONE; eMBErrorCode eRegStatus; if( *usLen > ( MB_PDU_FUNC_WRITE_SIZE + MB_PDU_SIZE_MIN ) ) { usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_ADDR_OFF] << 8 ); usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_ADDR_OFF + 1] ); usRegAddress++; usCoilCnt = ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_COILCNT_OFF] << 8 ); usCoilCnt |= ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_COILCNT_OFF + 1] ); ucByteCount = pucFrame[MB_PDU_FUNC_WRITE_MUL_BYTECNT_OFF]; /* Compute the number of expected bytes in the request. */ if( ( usCoilCnt & 0x0007 ) != 0 ) { ucByteCountVerify = ( UCHAR )( usCoilCnt / 8 + 1 ); } else { ucByteCountVerify = ( UCHAR )( usCoilCnt / 8 ); } if( ( usCoilCnt >= 1 ) && ( usCoilCnt <= MB_PDU_FUNC_WRITE_MUL_COILCNT_MAX ) && ( ucByteCountVerify == ucByteCount ) ) { eRegStatus = eMBRegCoilsCB( &pucFrame[MB_PDU_FUNC_WRITE_MUL_VALUES_OFF], usRegAddress, usCoilCnt, MB_REG_WRITE ); /* If an error occured convert it into a Modbus exception. */ if( eRegStatus != MB_ENOERR ) { eStatus = prveMBError2Exception( eRegStatus ); } else { /* The response contains the function code, the starting address * and the quantity of registers. We reuse the old values in the * buffer because they are still valid. */ *usLen = MB_PDU_FUNC_WRITE_MUL_BYTECNT_OFF; } } else { eStatus = MB_EX_ILLEGAL_DATA_VALUE; } } else { /* Can't be a valid write coil register request because the length * is incorrect. */ eStatus = MB_EX_ILLEGAL_DATA_VALUE; } return eStatus; }
eMBException eMBMasterFuncReadCoils(uint8_t *pucFrame, uint16_t *usLen) { uint8_t *ucMBFrame; uint16_t usRegAddress; uint16_t usCoilCount; uint8_t ucByteCount; 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++; usCoilCount = (uint16_t) (ucMBFrame[MB_PDU_REQ_READ_COILCNT_OFF] << 8); usCoilCount |= (uint16_t) (ucMBFrame[MB_PDU_REQ_READ_COILCNT_OFF + 1]); /* Test if the quantity of coils is a multiple of 8. If not last byte is * only partially field with unused coils set to zero. */ if ((usCoilCount & 0x0007) != 0) { ucByteCount = (uint8_t) (usCoilCount / 8 + 1); } else { ucByteCount = (uint8_t) (usCoilCount / 8); } /* Check if the number of registers to read is valid. If not return * Modbus illegal data value exception. */ if ((usCoilCount >= 1) && (ucByteCount == pucFrame[MB_PDU_FUNC_READ_COILCNT_OFF])) { /* Make callback to fill the buffer. */ eRegStatus = eMBMasterRegCoilsCB(&pucFrame[MB_PDU_FUNC_READ_VALUES_OFF], usRegAddress, usCoilCount, 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 read coil register request because the length is * incorrect. */ eStatus = MB_EX_ILLEGAL_DATA_VALUE; } return eStatus; }