Examples of modbuspal.slave.ModbusPduProcessor.processPDU()

modbuspal.slave.ModbusPduProcessor.processPDU()

This function is called to process the *REQUEST* PDU contained in the provided byte buffer, where the data starts at the specified offset. After processing the content of the *REQUEST*, the reply must be written into the same buffer, starting at the same offset. Note that offset+0 contains the function code, and should not be modified (unless the reply is an exception). The createIfNotExist indicates if the "Learn mode" is enabled or not. When the "Learn mode" is enabled, the resources that might be missing to complete the request should be created, so that the request can be serviced. @param functionCode the function code that triggered the call to this PDU processor instance @param slaveID the MODBUS slave address that is the target of the request @param buffer the byte buffer containing the request, and where the reply must be written @param offset offset where the actual data starts in the buffer. @param createIfNotExist true is the "Learn mode" is active, false otherwise. @return the length of the reply. if the returned length is less than or equal tozero, then ModbusPal will react like there was no reply to the request. do not forget that the reply is at least one byte long, because the first byte contains the function code.

            ModbusPalRecorder.recordOutgoing(slaveID,buffer,offset,length);
            modbusPalProject.notifyExceptionResponse();
            return length;
        }


        int length = mspp.processPDU(functionCode, slaveID, buffer, offset, modbusPalProject.isLeanModeEnabled());
        if(length<0)
        {
            System.err.println("Illegal function code "+functionCode);
            length = makeExceptionResponse(functionCode,XC_ILLEGAL_FUNCTION, buffer, offset);
        }

            req.notifyExceptionResponse();
            modbusPalProject.notifyExceptionResponse();
            return false;
        }


        boolean result = mspp.processPDU(req, slaveID, buffer, offset, modbusPalProject.isLeanModeEnabled());
        if(result==false)
        {
            System.err.println("Illegal function code "+functionCode);
            req.notifyPDUnotServiced();
            modbusPalProject.notifyPDUnotServiced();

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