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; }
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 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 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; }
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; }
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; }