CSickLaserSerial.h

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/* +---------------------------------------------------------------------------+
   |          The Mobile Robot Programming Toolkit (MRPT) C++ library          |
   |                                                                           |
   |                       http://www.mrpt.org/                                |
   |                                                                           |
   |   Copyright (C) 2005-2011  University of Malaga                           |
   |                                                                           |
   |    This software was written by the Machine Perception and Intelligent    |
   |      Robotics Lab, University of Malaga (Spain).                          |
   |    Contact: Jose-Luis Blanco  <jlblanco@ctima.uma.es>                     |
   |                                                                           |
   |  This file is part of the MRPT project.                                   |
   |                                                                           |
   |     MRPT is free software: you can redistribute it and/or modify          |
   |     it under the terms of the GNU General Public License as published by  |
   |     the Free Software Foundation, either version 3 of the License, or     |
   |     (at your option) any later version.                                   |
   |                                                                           |
   |   MRPT 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 General Public License for more details.                          |
   |                                                                           |
   |     You should have received a copy of the GNU General Public License     |
   |     along with MRPT.  If not, see <http://www.gnu.org/licenses/>.         |
   |                                                                           |
   +---------------------------------------------------------------------------+ */
#ifndef CSickLaserSerial_H
#define CSickLaserSerial_H

#include <mrpt/hwdrivers/C2DRangeFinderAbstract.h>
#include <mrpt/hwdrivers/CSerialPort.h>

namespace mrpt
{
        namespace hwdrivers
        {
                /** This "software driver" implements the communication protocol for interfacing a SICK LMS 2XX laser scanners through a standard RS232 serial port (or a USB2SERIAL converter).
                  *   The serial port is opened upon the first call to "doProcess" or "initialize", so you must call "loadConfig" before
                  *   this, or manually call "setSerialPort". Another alternative is to call the base class method C2DRangeFinderAbstract::bindIO,
                  *   but the "setSerialPort" interface is probably much simpler to use.
                  *
                  *   For an example of usage see the example in "samples/SICK_laser_serial_test".
                  *   See also the example configuration file for rawlog-grabber in "share/mrpt/config_files/rawlog-grabber".
                  *
                  *  \code
                  *  PARAMETERS IN THE ".INI"-LIKE CONFIGURATION STRINGS:
                  * -------------------------------------------------------
                  *   [supplied_section_name]
                  *   COM_port_WIN = COM1   // Serial port to connect to
                  *   COM_port_LIN = ttyS0
                  *
                  *   COM_baudRate = 38400 // Possible values: 9600 (default), 38400, 5000000
                  *   mm_mode      = 1/0   // 1: millimeter mode, 0:centimeter mode (Default=0)
                  *   FOV          = 180   // Field of view: 100 or 180 degrees (Default=180)
                  *   resolution   =  50   // Scanning resolution, in units of 1/100 degree. Valid values: 25,50,100 (Default=50)
                  *
                  *
                  *   pose_x=0.21       // Laser range scaner 3D position in the robot (meters)
                  *   pose_y=0
                  *   pose_z=0.34
                  *   pose_yaw=0        // Angles in degrees
                  *   pose_pitch=0
                  *   pose_roll=0
                  *  \endcode
                  *
                  * \sa C2DRangeFinderAbstract
                  * \ingroup mrpt_hwdrivers_grp
                  */
                class HWDRIVERS_IMPEXP CSickLaserSerial : public C2DRangeFinderAbstract
                {
                        DEFINE_GENERIC_SENSOR(CSickLaserSerial)

                private:
                        bool    m_mm_mode;
                        int             m_scans_FOV; //!< 100 or 180 deg
                        int             m_scans_res; //!< 1/100th of deg: 100, 50 or 25

                        /** The sensor 6D pose: */
                        poses::TPose3D          m_sensorPose;

                        static int                      CRC16_GEN_POL;


                        bool    tryToOpenComms(std::string *err_msg=NULL);      //!< Tries to open the com port and setup all the LMS protocol. Returns true if OK or already open.
                        bool    waitContinuousSampleFrame( std::vector<float> &ranges, unsigned char &LMS_status, bool &is_mm_mode );


                        bool LMS_setupSerialComms();    //!< Assures laser is connected and operating at 38400, in its case returns true.
                        bool LMS_setupBaudrate(int baud);       //!< Send a command to change the LMS comms baudrate, return true if ACK is OK. baud can be: 9600, 19200, 38400, 500000
                        bool LMS_statusQuery(); //!< Send a status query and wait for the answer. Return true on OK.
                        bool LMS_waitACK(uint16_t timeout_ms); //!< Returns false if timeout
                        bool LMS_waitIncomingFrame(uint16_t timeout); //!< Returns false if timeout
                        bool LMS_sendMeasuringMode_cm_mm();  //!< Returns false on error
                        bool LMS_startContinuousMode();
                        bool LMS_endContinuousMode();

            bool SendCommandToSICK(const uint8_t *cmd,const uint16_t cmd_len); //!< Send header+command-data+crc and waits for ACK. Return false on error.

                        uint8_t                 m_received_frame_buffer[2000];

                        std::string             m_com_port;             //!< If set to non-empty, the serial port will be attempted to be opened automatically when this class is first used to request data from the laser.
                        CSerialPort             *m_mySerialPort; //!< Will be !=NULL only if I created it, so I must destroy it at the end.
                        int             m_com_baudRate; //!< Baudrate: 9600, 38400, 500000
                        unsigned int    m_nTries_connect; //!< Default = 1
                        unsigned int    m_nTries_current;

                protected:
                        /** Loads specific configuration for the device from a given source of configuration parameters, for example, an ".ini" file, loading from the section "[iniSection]" (see utils::CConfigFileBase and derived classes)
                          *  See hwdrivers::CSickLaserSerial for the possible parameters
                          */
                        void  loadConfig_sensorSpecific(
                                const mrpt::utils::CConfigFileBase &configSource,
                                const std::string         &iniSection );

                public:
                        /** Constructor  */
                        CSickLaserSerial();

                        /** Destructor  */
                        virtual ~CSickLaserSerial();

                        /** Changes the serial port to connect to (call prior to 'doProcess'), for example "COM1" or "ttyS0".
                          *  This is not needed if the configuration is loaded with "loadConfig".
                          */
                        void  setSerialPort(const std::string &port) { m_com_port = port; }

                        /** \sa setSerialPort */
                        std::string getSerialPort() const { return m_com_port; }

                        /** Changes the serial port baud rate (call prior to 'doProcess'); valid values are 9600,38400 and 500000.
                          *  This is not needed if the configuration is loaded with "loadConfig".
                          *  \sa getBaudRate */
                        void setBaudRate(int baud) {
                                        m_com_baudRate = baud;
                        }
                        /** \sa setBaudRate */
                        int getBaudRate() const { return m_com_baudRate; }


                        /** Enables/Disables the millimeter mode, with a greater accuracy but a shorter range (default=false)
                          *  (call prior to 'doProcess') This is not needed if the configuration is loaded with "loadConfig".
                          */
                        void setMillimeterMode(bool mm_mode=true) { m_mm_mode = mm_mode; }

                        /** Set the scanning field of view - possible values are 100 or 180 (default)
                          *  (call prior to 'doProcess') This is not needed if the configuration is loaded with "loadConfig".
                          */
                        void setScanFOV(int fov_degrees) { m_scans_FOV = fov_degrees; }
                        int getScanFOV() const { return m_scans_FOV; }

                        /** Set the scanning resolution, in units of 1/100 degree - Possible values are 25, 50 and 100, for 0.25, 0.5 (default) and 1 deg.
                          *  (call prior to 'doProcess') This is not needed if the configuration is loaded with "loadConfig".
                          */
                        void setScanResolution(int res_1_100th_degree) { m_scans_res=res_1_100th_degree; }
                        int getScanResolution() const { return m_scans_res; }

            /** If performing several tries in ::initialize(), this is the current try loop number. */
                        unsigned int getCurrentConnectTry() const { return m_nTries_current; }


                        /** Specific laser scanner "software drivers" must process here new data from the I/O stream, and, if a whole scan has arrived, return it.
                          *  This method will be typically called in a different thread than other methods, and will be called in a timely fashion.
                          */
                        void  doProcessSimple(
                                bool                                                    &outThereIsObservation,
                                mrpt::slam::CObservation2DRangeScan     &outObservation,
                                bool                                                    &hardwareError );


                        /** Set-up communication with the laser.
                          *  Called automatically by rawlog-grabber.
                          *  If used manually, call after "loadConfig" and before "doProcess".
                          *
                          *  In this class this method does nothing, since the communications are setup at the first try from "doProcess" or "doProcessSimple".
                          */
                        void initialize();

                        /** Enables the scanning mode (in this class this has no effect).
                          * \return If everything works "true", or "false" if there is any error.
                          */
                        bool  turnOn();

                        /** Disables the scanning mode (in this class this has no effect).
                          * \return If everything works "true", or "false" if there is any error.
                          */
                        bool  turnOff();

                };      // End of class

        } // End of namespace
} // End of namespace

#endif