CanDriveHarmonica.cpp

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/****************************************************************
 *
 * Copyright (c) 2010
 *
 * Fraunhofer Institute for Manufacturing Engineering   
 * and Automation (IPA)
 *
 * +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 *
 * Project name: care-o-bot
 * ROS stack name: cob_driver
 * ROS package name: cob_canopen_motor
 * Description:
 *                                                              
 * +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 *                      
 * Author: Christian Connette, email:christian.connette@ipa.fhg.de
 * Supervised by: Christian Connette, email:christian.connette@ipa.fhg.de
 *
 * Date of creation: Feb 2009
 * ToDo: - Assign Adsress of digital input for homing switch "iHomeDigIn" via parameters (in evalReceived Message, Line 116).
 *         - Homing Event should be defined by a parameterfile and handed to CanDrive... e.g. via the DriveParam.h (in inithoming, Line 531).
 *               - Check whether "requestStatus" can/should be done in the class implementing the component
 *
 * +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *       * Redistributions of source code must retain the above copyright
 *         notice, this list of conditions and the following disclaimer.
 *       * 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.
 *       * Neither the name of the Fraunhofer Institute for Manufacturing 
 *         Engineering and Automation (IPA) nor the names of its
 *         contributors may be used to endorse or promote products derived from
 *         this software without specific prior written permission.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License LGPL as 
 * published by the Free Software Foundation, either version 3 of the 
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License LGPL for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public 
 * License LGPL along with this program. 
 * If not, see <http://www.gnu.org/licenses/>.
 *
 ****************************************************************/


#include <assert.h>
#include <cob_canopen_motor/CanDriveHarmonica.h>
#include <unistd.h> 

//-----------------------------------------------
CanDriveHarmonica::CanDriveHarmonica()
{
        // Parameter
        m_Param.iDivForRequestStatus = 10;
        m_Param.dCanTimeout = 6;

        // Variables
        m_pCanCtrl = NULL;

        m_iStatusCtrl = 0;
        m_dPosGearMeasRad = 0;
        m_dAngleGearRadMem  = 0;
        m_dVelGearMeasRadS = 0;

        m_VelCalcTime.SetNow();

        m_bLimSwLeft = false;
        m_bLimSwRight = false;

        m_bLimitSwitchEnabled = false;

        m_iCountRequestDiv = 0;

        m_iMotorState = ST_PRE_INITIALIZED;
        m_bCurrentLimitOn = false;

        m_iNumAttempsRecFail = 0;

        m_SendTime.SetNow();
        m_StartTime.SetNow();

        m_bOutputOfFailure = false;
        
        m_bIsInitialized = false;
        

        ElmoRec = new ElmoRecorder(this);

}

//-----------------------------------------------
void CanDriveHarmonica::setCanOpenParam( int iTxPDO1, int iTxPDO2, int iRxPDO2, int iTxSDO, int iRxSDO )
{
        m_ParamCanOpen.iTxPDO1 = iTxPDO1;
        m_ParamCanOpen.iTxPDO2 = iTxPDO2;
        m_ParamCanOpen.iRxPDO2 = iRxPDO2;
        m_ParamCanOpen.iTxSDO = iTxSDO;
        m_ParamCanOpen.iRxSDO = iRxSDO;

}

//-----------------------------------------------
bool CanDriveHarmonica::evalReceivedMsg(CanMsg& msg)
{
        bool bRet = false;
        int iDigIn;
        int iFailure;
        int iPara;

        int iHomeDigIn = 0x0001; // 0x0001 for CoB3 steering drive homing input; 0x0400 for Scara
        int iTemp1, iTemp2;
        
        m_CanMsgLast = msg;

        //-----------------------
        // eval answers from PDO1 - transmitted on SYNC msg
        if (msg.m_iID == m_ParamCanOpen.iTxPDO1)
        {
                iTemp1 = (msg.getAt(3) << 24) | (msg.getAt(2) << 16)
                                | (msg.getAt(1) << 8) | (msg.getAt(0) );

                m_dPosGearMeasRad = m_DriveParam.getSign() * m_DriveParam.
                        PosMotIncrToPosGearRad(iTemp1);

                iTemp2 = (msg.getAt(7) << 24) | (msg.getAt(6) << 16)
                                | (msg.getAt(5) << 8) | (msg.getAt(4) );
                
                m_dVelGearMeasRadS = m_DriveParam.getSign() * m_DriveParam.
                        VelMotIncrPeriodToVelGearRadS(iTemp2);

                m_WatchdogTime.SetNow();

                bRet = true;
        }       
        
        //-----------------------
        // eval answers from binary interpreter
        if (msg.m_iID == m_ParamCanOpen.iTxPDO2)
        {
                if( (msg.getAt(0) == 'P') && (msg.getAt(1) == 'X') ) // current pos
                {
                }

                else if( (msg.getAt(0) == 'P') && (msg.getAt(1) == 'A') ) // position absolute
                {
                }

                else if( (msg.getAt(0) == 'J') && (msg.getAt(1) == 'V') ) // current velocity
                {
                }

                else if( (msg.getAt(0) == 'B') && (msg.getAt(1) == 'G') ) // begin motion
                {
                }

                else if( (msg.getAt(0) == 'U') && (msg.getAt(1) == 'M') ) // user mode
                {
                        iDigIn = 0x1FFFFF & ( (msg.getAt(7) << 24) | (msg.getAt(6) << 16)
                                | (msg.getAt(5) << 8) | (msg.getAt(4)) );
                }

                else if( (msg.getAt(0) == 'I') && (msg.getAt(1) == 'P') ) // digital in == limit switches
                {
                        iDigIn = 0x1FFFFF & ( (msg.getAt(7) << 24) | (msg.getAt(6) << 16)
                                | (msg.getAt(5) << 8) | (msg.getAt(4)) );
                        iDigIn = 0x1FFFFF & ( (msg.getAt(7) << 24) | (msg.getAt(6) << 16)
                                | (msg.getAt(5) << 8) | (msg.getAt(4)) );

                        if( (iDigIn & iHomeDigIn) != 0x0000 )
                        {
                                m_bLimSwRight = true;
                        }                       
                }

                else if( (msg.getAt(0) == 'S') && (msg.getAt(1) == 'R') ) // status
                {
                        m_iStatusCtrl = (msg.getAt(7) << 24) | (msg.getAt(6) << 16)
                                | (msg.getAt(5) << 8) | (msg.getAt(4) );

                        evalStatusRegister(m_iStatusCtrl);
                        ElmoRec->readoutRecorderTryStatus(m_iStatusCtrl, seg_Data);
                        
                }

                else if( (msg.getAt(0) == 'M') && (msg.getAt(1) == 'F') ) // motor failure
                {
                        iFailure = (msg.getAt(7) << 24) | (msg.getAt(6) << 16)
                                | (msg.getAt(5) << 8) | (msg.getAt(4) );

                        evalMotorFailure(iFailure);
                }

                // debug eval
                else if( (msg.getAt(0) == 'U') && (msg.getAt(1) == 'M') )
                {
                        iPara = (msg.getAt(7) << 24) | (msg.getAt(6) << 16)
                                | (msg.getAt(5) << 8) | (msg.getAt(4) );

                        std::cout << "um " << iPara << std::endl;
                }
                
                else if( (msg.getAt(0) == 'P') && (msg.getAt(1) == 'M') )
                {
                        iPara = (msg.getAt(7) << 24) | (msg.getAt(6) << 16)
                                | (msg.getAt(5) << 8) | (msg.getAt(4) );

                        std::cout << "pm " << iPara << std::endl;
                }

                else if( (msg.getAt(0) == 'A') && (msg.getAt(1) == 'C') )
                {
                        iPara = (msg.getAt(7) << 24) | (msg.getAt(6) << 16)
                                | (msg.getAt(5) << 8) | (msg.getAt(4) );

                        std::cout << "ac " << iPara << std::endl;
                }

                else if( (msg.getAt(0) == 'D') && (msg.getAt(1) == 'C') )
                {
                        iPara = (msg.getAt(7) << 24) | (msg.getAt(6) << 16)
                                | (msg.getAt(5) << 8) | (msg.getAt(4) );

                        std::cout << "dc " << iPara << std::endl;
                }
                else if( (msg.getAt(0) == 'H') && (msg.getAt(1) == 'M') )
                {
                        // status message (homing armed = 1 / disarmed = 0) is encoded in 5th byte
                        if(msg.getAt(4) == 0)
                        {
                                // if 0 received: elmo disarmed homing after receiving the defined event
                                m_bLimSwRight = true;
                        }
                }
                else if( (msg.getAt(0) == 'I') && (msg.getAt(1) == 'Q') )
                {
                        int iVal=0;
                        iVal = (msg.getAt(7) << 24) | (msg.getAt(6) << 16)
                                | (msg.getAt(5) << 8) | (msg.getAt(4) );
                        float* pfVal;
                        pfVal=(float*)&iVal;
                        m_dMotorCurr = *pfVal;                  
                }

                else
                {
                }

                m_WatchdogTime.SetNow();

                bRet = true;
        }
        
        //-----------------------
        // eval answer from SDO
        if (msg.m_iID == m_ParamCanOpen.iTxSDO)
        {
                m_WatchdogTime.SetNow();

                if( (msg.getAt(0) >> 5) == 0) { //Received Upload SDO Segment (scs = 0)
                        //std::cout << "SDO Upload Segment received" << std::endl;
                        receivedSDODataSegment(msg);
                        
                } else if( (msg.getAt(0) & 0xE2) == 0x40) { //Received Initiate SDO Upload, that is not expedited -> start segmented upload (scs = 2 AND expedited flag = 0)
                        //std::cout << "SDO Initiate Segmented Upload received, Object ID: " << (msg.getAt(1) | (msg.getAt(2) << 8) ) << std::endl;
                        receivedSDOSegmentedInitiation(msg);
                        
                } else if( (msg.getAt(0) >> 5) == 4) { // Received an Abort SDO Transfer message, cs = 4
                        unsigned int iErrorNum = (msg.getAt(4) | msg.getAt(5) << 8 | msg.getAt(6) << 16 | msg.getAt(7) << 24);
                        receivedSDOTransferAbort(iErrorNum);
                }

                bRet = true;
        }

        return bRet;
}

//-----------------------------------------------
bool CanDriveHarmonica::init()
{
        int iCnt, iPosCnt;
        bool bRet = true;
        CanMsg Msg;

        m_iMotorState = ST_PRE_INITIALIZED;


        // Set Values for Modulo-Counting. Neccessary to preserve absolute position for homed motors (after encoder overflow)
        int iIncrRevWheel = int( (double)m_DriveParam.getGearRatio() * (double)m_DriveParam.getBeltRatio()
                                        * (double)m_DriveParam.getEncIncrPerRevMot() * 3 );
        IntprtSetInt(8, 'M', 'O', 0, 0);
        usleep(20000);
        IntprtSetInt(8, 'X', 'M', 2, iIncrRevWheel * 5000);
        usleep(20000);
        IntprtSetInt(8, 'X', 'M', 1, -iIncrRevWheel * 5000);
        usleep(20000);
        

        setTypeMotion(MOTIONTYPE_VELCTRL);
        // ---------- set position counter to zero
        IntprtSetInt(8, 'P', 'X', 0, 0);

        iCnt = 0;
        while(true)
        {
                m_pCanCtrl->receiveMsg(&Msg);
        
                if( (Msg.getAt(0) == 'P') && (Msg.getAt(1) == 'X') )
                {
                        iPosCnt = (Msg.getAt(7) << 24) | (Msg.getAt(6) << 16)
                                | (Msg.getAt(5) << 8) | (Msg.getAt(4) );
                        
                        m_dPosGearMeasRad = m_DriveParam.getSign() * m_DriveParam.PosMotIncrToPosGearRad(iPosCnt);
                        m_dAngleGearRadMem  = m_dPosGearMeasRad;
                        break;
                }

                if ( iCnt > 300 )
                {
                        std::cout << "CanDriveHarmonica: initial position not set" << std::endl;
                        bRet = false;
                        break;
                }

                usleep(10000);
                iCnt++;
        }

        // ---------- set PDO mapping
        // Mapping of TPDO1:
        // - position
        // - velocity
        
        // stop all emissions of TPDO1
        sendSDODownload(0x1A00, 0, 0);
        
        // position 4 byte of TPDO1
        sendSDODownload(0x1A00, 1, 0x60640020);

        // velocity 4 byte of TPDO1
        sendSDODownload(0x1A00, 2, 0x60690020);
        
        // transmission type "synch"
        sendSDODownload(0x1800, 2, 1);
        
        // activate mapped objects
        sendSDODownload(0x1A00, 0, 2);

        m_bWatchdogActive = false;
        
        if( bRet )
                m_bIsInitialized = true;
         
        return bRet;    
}
//-----------------------------------------------
bool CanDriveHarmonica::stop()
{       
        bool bRet = true;
        // motor off
        IntprtSetInt(8, 'M', 'O', 0, 0);
        usleep(20000);
        return bRet;
}
//-----------------------------------------------
bool CanDriveHarmonica::start()
{
        // motor on
        IntprtSetInt(8, 'M', 'O', 0, 1);
        usleep(20000);

        // ------------------- request status
        int iCnt;
        bool bRet = true;
        int iStatus;
        CanMsg Msg;

        //  clear the can buffer 
        do
        {
                bRet = m_pCanCtrl->receiveMsg(&Msg);
        }
        while(bRet == true);

        // send request
        IntprtSetInt(4, 'S', 'R', 0, 0);
        
        iCnt = 0;
        while(true)
        {
                m_pCanCtrl->receiveMsg(&Msg);
        
                if( (Msg.getAt(0) == 'S') && (Msg.getAt(1) == 'R') )
                {
                        iStatus = (Msg.getAt(7) << 24) | (Msg.getAt(6) << 16)
                                | (Msg.getAt(5) << 8) | (Msg.getAt(4) );
                        
                        bRet = evalStatusRegister(iStatus);
                        break;
                }

                if ( iCnt > 300 )
                {
                        std::cout << "CanDriveHarmonica::enableMotor(): No answer on status request" << std::endl;
                        bRet = false;
                        break;
                }

                usleep(10000);
                iCnt++;
        }

        // ------------------- start watchdog timer
        m_WatchdogTime.SetNow();
        m_SendTime.SetNow();

        return bRet;
}

//-----------------------------------------------
bool CanDriveHarmonica::reset()
{
        // repeat initialization
        
        // start network
        CanMsg msg;
        msg.m_iID  = 0;
        msg.m_iLen = 2;
        msg.set(1,0,0,0,0,0,0,0);
        m_pCanCtrl->transmitMsg(msg);

        // init and start
        bool bRet = init();
        bRet |= start();

        return bRet;
}
//-----------------------------------------------
bool CanDriveHarmonica::shutdown()
{
        std::cout << "shutdown drive " << m_DriveParam.getDriveIdent() << std::endl;

        IntprtSetInt(8, 'M', 'O', 0, 0);

        return true;
}

//-----------------------------------------------
bool CanDriveHarmonica::startWatchdog(bool bStarted)
{
        if (bStarted == true)
        {
                //save Watchdog state into member variable
                m_bWatchdogActive = true;
                // ------- init watchdog
                // Harmonica checks PC hearbeat
                // note: the COB-ID for a heartbeat message = 0x700 + Device ID
                
                const int c_iHeartbeatTimeMS = 1000;
                const int c_iNMTNodeID = 0x00;
                
                // consumer (PC) heartbeat time
                sendSDODownload(0x1016, 1, (c_iNMTNodeID << 16) | c_iHeartbeatTimeMS);
                
                // error behavior after failure: 0=pre-operational, 1=no state change, 2=stopped"       
                sendSDODownload(0x1029, 1, 2);
                
                // motor behavior after heartbeat failre: "quick stop"
                sendSDODownload(0x6007, 0, 3);

                // acivate emergency events: "heartbeat event"
                // Object 0x2F21 = "Emergency Events" which cause an Emergency Message
                // Bit 3 is responsible for Heartbeart-Failure.--> Hex 0x08
                sendSDODownload(0x2F21, 0, 0x08);
                usleep(20000);
 
        }
        else
        {       
                //save Watchdog state into member variable
                m_bWatchdogActive = false;

                //Motor action after Hearbeat-Error: No Action          
                sendSDODownload(0x6007, 0, 0);

                //Error Behavior: No state change
                sendSDODownload(0x1029, 1, 1);

                // Deacivate emergency events: "heartbeat event"
                // Object 0x2F21 = "Emergency Events" which cause an Emergency Message
                // Bit 3 is responsible for Heartbeart-Failure.
                sendSDODownload(0x2F21, 0, 0x00);
                usleep(25000);
                        
                
        }

        return true;
}

//-----------------------------------------------
bool CanDriveHarmonica::disableBrake(bool bDisabled)
{
        return true;
}

//-----------------------------------------------
double CanDriveHarmonica::getTimeToLastMsg()
{
        m_CurrentTime.SetNow();

        return m_CurrentTime - m_WatchdogTime;
}
//-----------------------------------------------
bool CanDriveHarmonica::getStatusLimitSwitch()
{
        return m_bLimSwRight;
}
//-----------------------------------------------
bool CanDriveHarmonica::initHoming()
{
        const int c_iPosRef = m_DriveParam.getEncOffset();
        
                // 1. make sure that, if on elmo controller still a pending homing from a previous startup is running (in case of warm-start without switching of the whole robot), this old sequence is disabled
                // disarm homing process
                IntprtSetInt(8, 'H', 'M', 1, 0);

                // always give can and controller some time to understand the command
                usleep(20000);

                /* THIS is needed for head_axis on cob3-2!
                
                //set input logic to 'general purpose'
                IntprtSetInt(8, 'I', 'L', 2, 7);                       
                usleep(20000);  
                */

                // 2. configure the homing sequence
                // 2.a set the value to which the increment counter shall be reseted as soon as the homing event occurs
                // value to load at homing event
                IntprtSetInt(8, 'H', 'M', 2, c_iPosRef);
                usleep(20000);
                
                // 2.b choose the chanel/switch on which the controller listens for a change or defined logic level (the homing event) (high/low/falling/rising)
                // home event
                // iHomeEvent = 5 : event according to defined FLS switch (for scara arm)
                // iHomeEvent = 9 : event according to definded DIN1 switch (for full steerable wheels COb3)
                // iHomeEvent =11 : event according to ?? (for COb3 Head-Axis)
                IntprtSetInt(8, 'H', 'M', 3, m_DriveParam.getHomingDigIn());
                //IntprtSetInt(8, 'H', 'M', 3, 11); //cob3-2
                usleep(20000);


                // 2.c choose the action that the controller shall perform after the homing event occured
                // HM[4] = 0 : after Event stop immediately
                // HM[4] = 2 : Do nothing!
                IntprtSetInt(8, 'H', 'M', 4, 2);
                usleep(20000);

                // 2.d choose the setting of the position counter (i.e. to the value defined in 2.a) after the homing event occured
                // HM[5] = 0 : absolute setting of position counter: PX = HM[2]
                IntprtSetInt(8, 'H', 'M', 5, 0);
                usleep(20000);

                // 3. let the motor turn some time to give him the possibility to escape the approximation sensor if accidently in home position already at the beginning of the sequence (done in CanCtrlPltf...)

        return true;    
}


//-----------------------------------------------
bool CanDriveHarmonica::execHoming() //not used by CanCtrlPltf, that has its own homing implementation
{

        int iCnt;
        CanMsg Msg;
        bool bRet = true;

        int iNrDrive = m_DriveParam.getDriveIdent();

        // 4. arm the homing process -> as soon as the approximation sensor is reached and the homing event occurs the commands set in 2. take effect
        // arm homing process
        IntprtSetInt(8, 'H', 'M', 1, 1);
                
        // 5. clear the can buffer to get rid of all uneccessary and potentially disturbing commands still floating through the wires
        do
        {
                // read from can
                bRet = m_pCanCtrl->receiveMsg(&Msg);
        }
        while(bRet == true);

        // 6. now listen for status of homing, to synchronize program flow -> proceed only after homing was succesful (homing disarmed by elmo) or timeout occured

        // set timeout counter to zero
        iCnt = 0;

        do
        {
                // 6.a ask for status of homing process (armed/disarmed)
                // ask for first byte in Homing Configuration
                IntprtSetInt(4, 'H', 'M', 1, 0);

                // 6.b read message from can
                m_pCanCtrl->receiveMsgRetry(&Msg, 10);
                
                // 6.c see if received message is answer of request and if so what is the status
                if( (Msg.getAt(0) == 'H') && (Msg.getAt(1) == 'M') )
                {       
                        // status message (homing armed = 1 / disarmed = 0) is encoded in 5th byte
                        if(Msg.getAt(4) == 0)
                        {
                                // if 0 received: elmo disarmed homing after receiving the defined event
                                std::cout << "Got Homing-Signal "  << std::endl;
                                m_bLimSwRight = true;
                                break;
                        }
                }

                // increase count for timeout
                usleep(10000);
                iCnt++;

        }
        while((m_bLimSwRight == false) && (iCnt<2000)); // wait some time
        
        // 7. see why finished (homed or timeout) and log out
        if(iCnt>=2000)
        {
                std::cout << "Homing failed - limit switch " << iNrDrive << " not reached" << std::endl;
                bRet = false;
        }
        else
        {
                std::cout << "Homing successful - limit switch " << iNrDrive << " ok" << std::endl;
                bRet = true;
        }
        //IntprtSetInt(8, 'I', 'L', 2, 9); //cob3-2                  |  -----------------------------------------------------------------------------------
        //usleep(20000);   

        return bRet;
}
//-----------------------------------------------
void CanDriveHarmonica::setGearPosVelRadS(double dPosGearRad, double dVelGearRadS)
{
        int iPosEncIncr;
        int iVelEncIncrPeriod;
                
        m_DriveParam.PosVelRadToIncr(dPosGearRad, dVelGearRadS, &iPosEncIncr, &iVelEncIncrPeriod);
        
        if(iVelEncIncrPeriod > m_DriveParam.getVelMax())
        {
                iVelEncIncrPeriod = (int)m_DriveParam.getVelMax();
        }

        if(iVelEncIncrPeriod < -m_DriveParam.getVelMax())
        {
                iVelEncIncrPeriod = (int)-m_DriveParam.getVelMax();
        }

        if(m_iTypeMotion == MOTIONTYPE_POSCTRL)
        {
                        //new: set VELOCITY for PTP Motion              
                        IntprtSetInt(8, 'S', 'P', 0, iVelEncIncrPeriod);

                        // Position Relativ ("PR") , because of positioning of driving wheel
                        // which is not initialized to zero on a specific position
                        // only when command is for homed steering wheel set absolute
                        if (m_DriveParam.getIsSteer() == true)
                                IntprtSetInt(8, 'P', 'A', 0, iPosEncIncr);
                        else 
                                IntprtSetInt(8, 'P', 'R', 0, iPosEncIncr);

                        IntprtSetInt(4, 'B', 'G', 0, 0);
                
        }

        if(m_iTypeMotion == MOTIONTYPE_VELCTRL)
        {       
                iVelEncIncrPeriod *= m_DriveParam.getSign();
                IntprtSetInt(8, 'J', 'V', 0, iVelEncIncrPeriod);
                IntprtSetInt(4, 'B', 'G', 0, 0);
        }
        
        // request pos and vel by TPDO1, triggered by SYNC msg
        // (to request pos by SDO usesendSDOUpload(0x6064, 0) )
        CanMsg msg;
        msg.m_iID  = 0x80;
        msg.m_iLen = 0;
        msg.set(0,0,0,0,0,0,0,0);
        m_pCanCtrl->transmitMsg(msg);
}

//-----------------------------------------------
void CanDriveHarmonica::setGearVelRadS(double dVelGearRadS)
{
        int iVelEncIncrPeriod;
        
        // calc motor velocity from joint velocity
        iVelEncIncrPeriod = m_DriveParam.getSign() * m_DriveParam.VelGearRadSToVelMotIncrPeriod(dVelGearRadS);

        if(iVelEncIncrPeriod > m_DriveParam.getVelMax())
        {
                std::cout << "SteerVelo asked for " << iVelEncIncrPeriod << " EncIncrements" << std::endl;
                iVelEncIncrPeriod = (int)m_DriveParam.getVelMax();
        }

        if(iVelEncIncrPeriod < -m_DriveParam.getVelMax())
        {
                std::cout << "SteerVelo asked for " << iVelEncIncrPeriod << " EncIncrements" << std::endl;
                iVelEncIncrPeriod = -1 * (int)m_DriveParam.getVelMax();
        }
        
        IntprtSetInt(8, 'J', 'V', 0, iVelEncIncrPeriod);
        IntprtSetInt(4, 'B', 'G', 0, 0);

        // request pos and vel by TPDO1, triggered by SYNC msg
        // (to request pos by SDO use sendSDOUpload(0x6064, 0) )
        // sync msg is: iID 0x80 with msg (0,0,0,0,0,0,0,0)
        CanMsg msg;
        msg.m_iID  = 0x80;
        msg.m_iLen = 0;
        msg.set(0,0,0,0,0,0,0,0);
        m_pCanCtrl->transmitMsg(msg);

        // send heartbeat to keep watchdog inactive
        msg.m_iID  = 0x700;
        msg.m_iLen = 5;
        msg.set(0x00,0,0,0,0,0,0,0);
        m_pCanCtrl->transmitMsg(msg);

        m_CurrentTime.SetNow();
        double dt = m_CurrentTime - m_SendTime;
        if ((dt > 1.0) && m_bWatchdogActive)
        {
                std::cout << "Time between send velocity of motor " << m_DriveParam.getDriveIdent() 
                        << " is too large: " << dt << " s" << std::endl;
        }
        m_SendTime.SetNow();


        // request status
        m_iCountRequestDiv++;
        if (m_iCountRequestDiv > m_Param.iDivForRequestStatus)
        {
                requestStatus();
                m_iCountRequestDiv = 0;
        }
}

//-----------------------------------------------
void CanDriveHarmonica::getGearPosRad(double* dGearPosRad)
{
        *dGearPosRad = m_dPosGearMeasRad;
}

//-----------------------------------------------
void CanDriveHarmonica::getGearPosVelRadS(double* pdAngleGearRad, double* pdVelGearRadS)
{
        *pdAngleGearRad = m_dPosGearMeasRad;
        *pdVelGearRadS = m_dVelGearMeasRadS;
}

//-----------------------------------------------
void CanDriveHarmonica::getGearDeltaPosVelRadS(double* pdAngleGearRad, double* pdVelGearRadS)
{
        *pdAngleGearRad = m_dPosGearMeasRad - m_dAngleGearRadMem;
        *pdVelGearRadS = m_dVelGearMeasRadS;
        m_dAngleGearRadMem = m_dPosGearMeasRad;
}

//-----------------------------------------------
void CanDriveHarmonica::getData(double* pdPosGearRad, double* pdVelGearRadS,
                                                                int* piTorqueCtrl, int* piStatusCtrl)
{
        *pdPosGearRad = m_dPosGearMeasRad;
        *pdVelGearRadS = m_dVelGearMeasRadS;
        *piTorqueCtrl = m_iTorqueCtrl;
        *piStatusCtrl = m_iStatusCtrl;
}

//-----------------------------------------------
void CanDriveHarmonica::requestPosVel()
{
        // request pos and vel by TPDO1, triggered by SYNC msg
        CanMsg msg;
        msg.m_iID  = 0x80;
        msg.m_iLen = 0;
        msg.set(0,0,0,0,0,0,0,0);
        m_pCanCtrl->transmitMsg(msg);
        // (to request pos by SDO use sendSDOUpload(0x6064, 0) )
}

//-----------------------------------------------
void CanDriveHarmonica::sendHeartbeat()
{
        CanMsg msg;
        msg.m_iID  = 0x700;
        msg.m_iLen = 5;
        msg.set(0x00,0,0,0,0,0,0,0);
        m_pCanCtrl->transmitMsg(msg);
}

//-----------------------------------------------
void CanDriveHarmonica::requestStatus()
{
        IntprtSetInt(4, 'S', 'R', 0, 0);
}

//-----------------------------------------------
void CanDriveHarmonica::requestMotorTorque()
{       
        // send command for requesting motor current:
        IntprtSetInt(4, 'I', 'Q', 0, 0);        // active current
        //IntprtSetInt(4, 'I', 'D', 0, 0);      // reactive current
}

//-----------------------------------------------
bool CanDriveHarmonica::isError()
{
        if (m_iMotorState != ST_MOTOR_FAILURE)
        {
                // Check timeout of can communication
                double dWatchTime = getTimeToLastMsg();

                if (dWatchTime>m_Param.dCanTimeout)
                {
                        if ( m_bOutputOfFailure == false)
                        {
                                std::cout << "Motor " << m_DriveParam.getDriveIdent() <<
                                        " has no can communication for " << dWatchTime << " s." << std::endl;
                        }

                        m_iMotorState = ST_MOTOR_FAILURE;
                        m_FailureStartTime.SetNow();
                }
                
        }
        
        return (m_iMotorState == ST_MOTOR_FAILURE);
}
//-----------------------------------------------
bool CanDriveHarmonica::setTypeMotion(int iType)
{
        int iMaxAcc = int(m_DriveParam.getMaxAcc());
        int iMaxDcc = int(m_DriveParam.getMaxDec());
        CanMsg Msg;

        if (iType == MOTIONTYPE_POSCTRL)
        {
                // 1.) Switch to UnitMode = 5 (Single Loop Position Control) //
        
                // switch off Motor to change Unit-Mode
                IntprtSetInt(8, 'M', 'O', 0, 0);
                usleep(20000);
                // switch Unit-Mode
                IntprtSetInt(8, 'U', 'M', 0, 5);
                        
                // set Target Radius to X Increments
                IntprtSetInt(8, 'T', 'R', 1, 15);
                // set Target Time to X ms
                IntprtSetInt(8, 'T', 'R', 2, 100);

                // set maximum Acceleration to X Incr/s^2               
                IntprtSetInt(8, 'A', 'C', 0, iMaxAcc);
                // set maximum decceleration to X Incr/s^2
                IntprtSetInt(8, 'D', 'C', 0, iMaxDcc);  
                usleep(100000);
                
                
        }
        else if (iType == MOTIONTYPE_TORQUECTRL)
        {
                // Switch to TorqueControll-Mode
                // switch off Motor to change Unit-Mode
                IntprtSetInt(8, 'M', 'O', 0, 0);
                usleep(50000);
                // switch Unit-Mode 1: Torque Controlled
                IntprtSetInt(8, 'U', 'M', 0, 1);
                // disable external compensation input
                // to avoid noise from that input pin
                IntprtSetInt(8, 'R', 'M', 0, 0);

                // debugging:
                std::cout << "Motor"<<m_DriveParam.getDriveIdent()<<" Unit Mode switched to: TORQUE controlled" << std::endl;
                usleep(100000);
        }
        else
        {
                //Default Motion Type = VelocityControled
                // switch off Motor to change Unit-Mode
                IntprtSetInt(8, 'M', 'O', 0, 0);
                // switch Unit-Mode
                IntprtSetInt(8, 'U', 'M', 0, 2);
                // set profiler Mode (only if Unit Mode = 2)
                IntprtSetInt(8, 'P', 'M', 0, 1);

                // set maximum Acceleration to X Incr/s^2               
                IntprtSetInt(8, 'A', 'C', 0, iMaxAcc);
                // set maximum decceleration to X Incr/s^2
                IntprtSetInt(8, 'D', 'C', 0, iMaxDcc);  
                usleep(100000);
        }
        
        m_iTypeMotion = iType;
        return true;
}


//-----------------------------------------------
void CanDriveHarmonica::IntprtSetInt(int iDataLen, char cCmdChar1, char cCmdChar2, int iIndex, int iData)
{
        char cIndex[2];
        char cInt[4];
        CanMsg CMsgTr;

        CMsgTr.m_iID = m_ParamCanOpen.iRxPDO2;  
        CMsgTr.m_iLen = iDataLen;

        cIndex[0] = iIndex;
        cIndex[1] = (iIndex >> 8) & 0x3F;  // The two MSB must be 0. Cf. DSP 301 Implementation guide p. 39.

        cInt[0] = iData;
        cInt[1] = iData >> 8;
        cInt[2] = iData >> 16;
        cInt[3] = iData >> 24;

        CMsgTr.set(cCmdChar1, cCmdChar2, cIndex[0], cIndex[1], cInt[0], cInt[1], cInt[2], cInt[3]);
        m_pCanCtrl->transmitMsg(CMsgTr);
}

//-----------------------------------------------
void CanDriveHarmonica::IntprtSetFloat(int iDataLen, char cCmdChar1, char cCmdChar2, int iIndex, float fData)
{
        char cIndex[2];
        char cFloat[4];
        CanMsg CMsgTr;
        char* pTempFloat = NULL;
        
        CMsgTr.m_iID = m_ParamCanOpen.iRxPDO2;  
        CMsgTr.m_iLen = iDataLen;

        cIndex[0] = iIndex;
        // for sending float values bit 6 has to be zero and bit 7 one (according to Elmo Implementation guide)
        cIndex[1] = (iIndex >> 8) & 0x3F;       // setting bit 6 to zero with mask 0b10111111->0xBF
        cIndex[1] = cIndex[1] | 0x80;           // setting bit 7 to one with mask 0b10000000 ->0x80

        pTempFloat = (char*)&fData;
        for( int i=0; i<4; i++ )
                cFloat[i] = pTempFloat[i];
        
        CMsgTr.set(cCmdChar1, cCmdChar2, cIndex[0], cIndex[1], cFloat[0], cFloat[1], cFloat[2], cFloat[3]);
        m_pCanCtrl->transmitMsg(CMsgTr);
}

//-----------------------------------------------
// SDO Communication Protocol, most functions are used for general SDO Segmented Transfer
//-----------------------------------------------

//-----------------------------------------------
void CanDriveHarmonica::sendSDOAbort(int iObjIndex, int iObjSubIndex, unsigned int iErrorCode)
{
        CanMsg CMsgTr;
        const int ciAbortTransferReq = 0x04 << 5;
        
        CMsgTr.m_iLen = 8;
        CMsgTr.m_iID = m_ParamCanOpen.iRxSDO;

        unsigned char cMsg[8];
        
        cMsg[0] = ciAbortTransferReq;
        cMsg[1] = iObjIndex;
        cMsg[2] = iObjIndex >> 8;
        cMsg[3] = iObjSubIndex;
        cMsg[4] = iErrorCode;
        cMsg[5] = iErrorCode >> 8;
        cMsg[6] = iErrorCode >> 16;
        cMsg[7] = iErrorCode >> 24;

        CMsgTr.set(cMsg[0], cMsg[1], cMsg[2], cMsg[3], cMsg[4], cMsg[5], cMsg[6], cMsg[7]);
        m_pCanCtrl->transmitMsg(CMsgTr);
}

//-----------------------------------------------
void CanDriveHarmonica::receivedSDOTransferAbort(unsigned int iErrorCode){
        std::cout << "SDO Abort Transfer received with error code: " << iErrorCode;
        seg_Data.statusFlag = segData::SDO_SEG_FREE;
}

//-----------------------------------------------
void CanDriveHarmonica::sendSDOUpload(int iObjIndex, int iObjSubIndex)
{
        CanMsg CMsgTr;
        const int ciInitUploadReq = 0x40;
        
        CMsgTr.m_iLen = 8;
        CMsgTr.m_iID = m_ParamCanOpen.iRxSDO;

        unsigned char cMsg[8];
        
        cMsg[0] = ciInitUploadReq;
        cMsg[1] = iObjIndex;
        cMsg[2] = iObjIndex >> 8;
        cMsg[3] = iObjSubIndex;
        cMsg[4] = 0x00;
        cMsg[5] = 0x00;
        cMsg[6] = 0x00;
        cMsg[7] = 0x00;

        CMsgTr.set(cMsg[0], cMsg[1], cMsg[2], cMsg[3], cMsg[4], cMsg[5], cMsg[6], cMsg[7]);
        m_pCanCtrl->transmitMsg(CMsgTr);
}

//-----------------------------------------------
void CanDriveHarmonica::sendSDODownload(int iObjIndex, int iObjSubIndex, int iData)
{
        CanMsg CMsgTr;

        const int ciInitDownloadReq = 0x20;
        const int ciNrBytesNoData = 0x00;
        const int ciExpedited = 0x02;
        const int ciDataSizeInd = 0x01;
        
        CMsgTr.m_iLen = 8;
        CMsgTr.m_iID = m_ParamCanOpen.iRxSDO;

        unsigned char cMsg[8];
        
        cMsg[0] = ciInitDownloadReq | (ciNrBytesNoData << 2) | ciExpedited | ciDataSizeInd;
        cMsg[1] = iObjIndex;
        cMsg[2] = iObjIndex >> 8;
        cMsg[3] = iObjSubIndex;
        cMsg[4] = iData;
        cMsg[5] = iData >> 8;
        cMsg[6] = iData >> 16;
        cMsg[7] = iData >> 24;

        CMsgTr.set(cMsg[0], cMsg[1], cMsg[2], cMsg[3], cMsg[4], cMsg[5], cMsg[6], cMsg[7]);
        m_pCanCtrl->transmitMsg(CMsgTr);
}

//-----------------------------------------------
void CanDriveHarmonica::evalSDO(CanMsg& CMsg, int* pIndex, int* pSubindex)
{
        *pIndex = (CMsg.getAt(2) << 8) | CMsg.getAt(1);
        *pSubindex = CMsg.getAt(3);
}

//-----------------------------------------------
int CanDriveHarmonica::getSDODataInt32(CanMsg& CMsg)
{
        int iData = (CMsg.getAt(7) << 24) | (CMsg.getAt(6) << 16) |
                (CMsg.getAt(5) << 8) | CMsg.getAt(4);

        return iData;
}

//-----------------------------------------------
int CanDriveHarmonica::receivedSDOSegmentedInitiation(CanMsg& msg) {

        if(seg_Data.statusFlag == segData::SDO_SEG_FREE || seg_Data.statusFlag == segData::SDO_SEG_WAITING) { //only accept new SDO Segmented Upload if seg_Data is free
                seg_Data.resetTransferData();
                seg_Data.statusFlag = segData::SDO_SEG_COLLECTING;

                //read out objectIDs
                evalSDO(msg, &seg_Data.objectID, &seg_Data.objectSubID);

                //data in byte 4 to 7 contain the number of bytes to be uploaded (if Size indicator flag is set)
                if( (msg.getAt(0) & 0x01) == 1) {
                        seg_Data.numTotalBytes = msg.getAt(7) << 24 | msg.getAt(6) << 16 | msg.getAt(5) << 8 | msg.getAt(4);
                } else seg_Data.numTotalBytes = 0;

                sendSDOUploadSegmentConfirmation(seg_Data.toggleBit);
        }

        return 0;

}

//-----------------------------------------------
int CanDriveHarmonica::receivedSDODataSegment(CanMsg& msg){

        int numEmptyBytes = 0;

        //Read SDO Upload Protocol:
        //Byte 0: SSS T NNN C | SSS=Cmd-Specifier, T=ToggleBit, NNN=num of empty bytes, C=Finished
        //Byte 1 to 7: Data

        if( (msg.getAt(0) & 0x10) != (seg_Data.toggleBit << 4) ) { 
                std::cout << "Toggle Bit error, send Abort SDO with \"Toggle bit not alternated\" error" << std::endl;
                sendSDOAbort(seg_Data.objectID, seg_Data.objectSubID, 0x05030000); //Send SDO Abort with error code Toggle-Bit not alternated
                return 1;
        }
                
        if( (msg.getAt(0) & 0x01) == 0x00) { //Is finished-bit not set?
                seg_Data.statusFlag = segData::SDO_SEG_COLLECTING;
        } else {
                //std::cout << "SDO Segmented Transfer finished bit found!" << std::endl;
                seg_Data.statusFlag = segData::SDO_SEG_PROCESSING;
        };

        numEmptyBytes = (msg.getAt(0) >> 1) & 0x07;
        //std::cout << "NUM empty bytes in SDO :" << numEmptyBytes << std::endl;
        
        for(int i=1; i<=7-numEmptyBytes; i++) {
                seg_Data.data.push_back(msg.getAt(i));
        }

        if(seg_Data.statusFlag == segData::SDO_SEG_PROCESSING) {
                finishedSDOSegmentedTransfer();         
        } else {
                seg_Data.toggleBit = !seg_Data.toggleBit;
                sendSDOUploadSegmentConfirmation(seg_Data.toggleBit);
        }
                
        return 0;
}

//-----------------------------------------------
void CanDriveHarmonica::sendSDOUploadSegmentConfirmation(bool toggleBit) {

        CanMsg CMsgTr;
        int iConfirmSegment = 0x60; //first three bits must be css = 3 : 011 00000
        iConfirmSegment = iConfirmSegment | (toggleBit << 4); //fourth bit is toggle bit: 011T0000
        
        CMsgTr.m_iLen = 8;
        CMsgTr.m_iID = m_ParamCanOpen.iRxSDO;

        unsigned char cMsg[8];
        
        cMsg[0] = iConfirmSegment;
        cMsg[1] = 0x00;
        cMsg[2] = 0x00;
        cMsg[3] = 0x00;
        cMsg[4] = 0x00;
        cMsg[5] = 0x00;
        cMsg[6] = 0x00;
        cMsg[7] = 0x00;

        CMsgTr.set(cMsg[0], cMsg[1], cMsg[2], cMsg[3], cMsg[4], cMsg[5], cMsg[6], cMsg[7]);
        m_pCanCtrl->transmitMsg(CMsgTr);
}

//-----------------------------------------------
void CanDriveHarmonica::finishedSDOSegmentedTransfer() {
        seg_Data.statusFlag = segData::SDO_SEG_PROCESSING;
        
        if( (seg_Data.data.size() != seg_Data.numTotalBytes) & (seg_Data.numTotalBytes != 0) ) {
                std::cout << "WARNING: SDO tranfer finished but number of collected bytes " 
                        << seg_Data.data.size() << " != expected number of bytes: " << seg_Data.numTotalBytes << std::endl;
                //abort processing?
        }
        
        if(seg_Data.objectID == 0x2030) {
                if(ElmoRec->processData(seg_Data) == 0) seg_Data.statusFlag = segData::SDO_SEG_FREE;
        }
}

//-----------------------------------------------
double CanDriveHarmonica::estimVel(double dPos)
{
        double dVel;
        double dt;

        m_CurrentTime.SetNow();

        dt = m_CurrentTime - m_VelCalcTime;

        dVel = (dPos - m_dOldPos)/dt;

        m_dOldPos = dPos;
        m_VelCalcTime.SetNow();

        return dVel;
}
//-----------------------------------------------
bool CanDriveHarmonica::evalStatusRegister(int iStatus)
{
        bool bNoError;

        // --------- Error status
        if( isBitSet(iStatus, 0) )
        {
                // ------------ Error
                if ( m_bOutputOfFailure == false )
                {
                        std::cout << "Error of drive: " << m_DriveParam.getDriveIdent() << std::endl;

                        if( (iStatus & 0x0000000E) == 2)
                                std::cout << "- drive error under voltage" << std::endl;

                        if( (iStatus & 0x0000000E) == 4)
                                std::cout << "- drive error over voltage" << std::endl;

                        if( (iStatus & 0x0000000E) == 10)
                                std::cout << "- drive error short circuit" << std::endl;

                        if( (iStatus & 0x0000000E) == 12)
                                std::cout << "- drive error overheating" << std::endl;

                        // Request detailed description of failure
                        IntprtSetInt(4, 'M', 'F', 0, 0);
                }

                m_iNewMotorState = ST_MOTOR_FAILURE;

                bNoError = false;
        }
        else if ( isBitSet(iStatus, 6) )
        {
                // General failure 
                if ( m_bOutputOfFailure == false )
                {
                        std::cout << "Motor " << m_DriveParam.getDriveIdent() << " failure latched" << std::endl;

                        // Request detailed description of failure
                        IntprtSetInt(4, 'M', 'F', 0, 0);

                        m_FailureStartTime.SetNow();
                }
                m_iNewMotorState = ST_MOTOR_FAILURE;

                bNoError = false;
        }
        else
        {
                // ---------- No error 
                bNoError = true;

                // Clear flag for failure output only if at least one
                // status message without error has been received.
                // Printing an error message on recovery is avoided.
                m_bOutputOfFailure = false;

                // --------- General status bits
                // check if Bit 4 (-> Motor is ON) ist set
                if( isBitSet(iStatus, 4) )
                {
                        if (m_iMotorState != ST_OPERATION_ENABLED)
                        {
                                std::cout << "Motor " << m_DriveParam.getDriveIdent() << " operation enabled" << std::endl;
                                m_FailureStartTime.SetNow();
                        }

                        m_iNewMotorState = ST_OPERATION_ENABLED;
                }
                else
                {
                        if (m_iMotorState != ST_OPERATION_DISABLED)
                        {
                                std::cout << "Motor " << m_DriveParam.getDriveIdent() << " operation disabled" << std::endl;
                        }

                        m_iNewMotorState = ST_OPERATION_DISABLED;
                }

                // Current limit
                if( isBitSet(iStatus, 13) )
                {
                        if (m_bCurrentLimitOn == false)
                                std::cout << "Motor " << m_DriveParam.getDriveIdent() << "current limit on" << std::endl;

                        m_bCurrentLimitOn = true;
                }
                else
                        m_bCurrentLimitOn = false;
        }

        // Change state
        m_iMotorState = m_iNewMotorState;

        if (m_iMotorState == ST_MOTOR_FAILURE)
                m_bOutputOfFailure = true;

        return bNoError;
}

//-----------------------------------------------
void CanDriveHarmonica::evalMotorFailure(int iFailure)
{

        std::cout << "Motor " << m_DriveParam.getDriveIdent() << " has a failure: " << iFailure << std::endl;
        
        if( isBitSet(iFailure, 2) )
        {
                std::cout << "- feedback loss" << std::endl;
        }

        if( isBitSet(iFailure, 3) )
        {
                std::cout << "- peak current excced" << std::endl;
        }

        if( isBitSet(iFailure, 7) )
        {
                std::cout << "- speed track error" << std::endl;
        }
        
        if( isBitSet(iFailure, 8) )
        {
                std::cout << "- position track error" << std::endl;
        }

        if( isBitSet(iFailure, 17) )
        {
                std::cout << "- speed limit exceeded" << std::endl;
        }
        
        if( isBitSet(iFailure, 21) )
        {
                std::cout << "- motor stuck" << std::endl;
        }
}

//-----------------------------------------------
void CanDriveHarmonica::setMotorTorque(double dTorqueNm)
{
        // convert commanded motor current into amperes
        float fMotCurr = m_DriveParam.getSign() * dTorqueNm / m_DriveParam.getCurrToTorque();

        // check for limitations
        if  (fMotCurr > m_DriveParam.getCurrMax())
        {
                fMotCurr = m_DriveParam.getCurrMax();
                std::cout << "Torque command too high: " << fMotCurr << " Nm. Torque has been limitited." << std::endl;
        }
        if (fMotCurr < -m_DriveParam.getCurrMax())
        {
                fMotCurr = -m_DriveParam.getCurrMax();
                std::cout << "Torque command too high: " << fMotCurr << " Nm. Torque has been limitited." << std::endl;
        }

        // send Command 
        IntprtSetFloat(8, 'T', 'C', 0, fMotCurr);

        // request pos and vel by TPDO1, triggered by SYNC msg
        CanMsg msg;
        msg.m_iID  = 0x80;
        msg.m_iLen = 0;
        msg.set(0,0,0,0,0,0,0,0);
        m_pCanCtrl->transmitMsg(msg);

        // send heartbeat to keep watchdog inactive
        sendHeartbeat();
        
        m_CurrentTime.SetNow();
        double dt = m_CurrentTime - m_SendTime;
        if (dt > 1.0)
        {
                std::cout << "Time between send current/torque of motor " << m_DriveParam.getDriveIdent() 
                        << " is too large: " << dt << " s" << std::endl;
        }
        m_SendTime.SetNow();


        // request status
        m_iCountRequestDiv++;
        if (m_iCountRequestDiv > m_Param.iDivForRequestStatus)
        {
                requestStatus();
                m_iCountRequestDiv = 0;
        }

}

//-----------------------------------------------
void CanDriveHarmonica::getMotorTorque(double* dTorqueNm)
{
        // With motor sign:
        *dTorqueNm = m_DriveParam.getSign() * m_dMotorCurr * m_DriveParam.getCurrToTorque();
        
}



//----------------
//----------------
//Function, that proceeds (Elmo-) recorder readout

//-----------------------------------------------
int CanDriveHarmonica::setRecorder(int iFlag, int iParam, std::string sParam) {

        switch(iFlag) {
                case 0: //Configure Elmo Recorder for new Record, param = iRecordingGap, which specifies every which time quantum (4*90usec) a new data point is recorded
                        if(iParam < 1) iParam = 1;
                        ElmoRec->isInitialized(true);
                        ElmoRec->configureElmoRecorder(iParam, m_DriveParam.getDriveIdent()); //int startImmediately is default = 1
                        return 0;
                                        
                case 1: //Query upload of previous recorded data, data is being proceeded after complete upload, param = recorded ID, filename
                        if(!ElmoRec->isInitialized(false)) return 1;
                        
                        if(seg_Data.statusFlag == segData::SDO_SEG_FREE) {
                                if( (iParam != 1) && (iParam != 2) && (iParam != 10) && (iParam != 16) ) {
                                        iParam = 1;
                                        std::cout << "Changed the Readout object to #1 as your selected object hasn't been recorded!" << std::endl;
                                }
                                ElmoRec->setLogFilename(sParam);
                                seg_Data.statusFlag = segData::SDO_SEG_WAITING;
                                ElmoRec->readoutRecorderTry(iParam); //as subindex, give the recorded variable
                                return 0;
                        } else {
                                std::cout << "Previous transmission not finished or colected data hasn't been proceeded yet" << std::endl;
                                return 2;
                        }
                        
                        break;
                        
                case 2: //request status, still collecting data during ReadOut process?
                        if(seg_Data.statusFlag == segData::SDO_SEG_COLLECTING) {
                                //std::cout << "Transmission of data is still in progress" << std::endl;
                                return 2;
                        } else if(seg_Data.statusFlag == segData::SDO_SEG_PROCESSING) {
                                //std::cout << "Transmission of data finished, data not proceeded yet" << std::endl;
                                return 2;
                        } else if(seg_Data.statusFlag == segData::SDO_SEG_WAITING) {
                                //std::cout << "Still waiting for transmission to begin" << std::endl;
                                return 2;
                        } else { //finished transmission and finished proceeding
                                return 0;
                        }
                        
                        break;
                        
                case 99: //Abort ongoing SDO data Transmission and clear collected data
                        sendSDOAbort(0x2030, 0x00, 0x08000020); //send general error abort
                        seg_Data.resetTransferData(); 
                        return 0;
        }

        return 0;
}