CSickLaserUSB.cpp

Go to the documentation of this file.

/* +------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)            |
   |                          http://www.mrpt.org/                          |
   |                                                                        |
   | Copyright (c) 2005-2017, Individual contributors, see AUTHORS file     |
   | See: http://www.mrpt.org/Authors - All rights reserved.                |
   | Released under BSD License. See details in http://www.mrpt.org/License |
   +------------------------------------------------------------------------+ */
 
#include "hwdrivers-precomp.h"  // Precompiled headers
 
#include <mrpt/utils/CStream.h>
#include <mrpt/utils/utils_defs.h>
#include <mrpt/system/os.h>
#include <mrpt/utils/crc.h>
#include <mrpt/hwdrivers/CSickLaserUSB.h>
 
#ifdef MRPT_OS_WINDOWS
#include <windows.h>
#endif
 
IMPLEMENTS_GENERIC_SENSOR(CSickLaserUSB, mrpt::hwdrivers)
 
using namespace std;
using namespace mrpt;
using namespace mrpt::utils;
using namespace mrpt::comms;
using namespace mrpt::obs;
using namespace mrpt::hwdrivers;
using namespace mrpt::poses;
 
/*-------------------------------------------------------------
                                                CSickLaserUSB
-------------------------------------------------------------*/
CSickLaserUSB::CSickLaserUSB()
        : m_usbConnection(nullptr), m_serialNumber("LASER001"), m_timeStartUI(0)
{
        MRPT_START
        m_sensorLabel = "SICKLMS";
        m_usbConnection = new CInterfaceFTDI();
        MRPT_END
}
 
/*-------------------------------------------------------------
                                                ~CSickLaserUSB
-------------------------------------------------------------*/
CSickLaserUSB::~CSickLaserUSB()
{
        delete m_usbConnection;
        m_usbConnection = nullptr;
}
 
/*-------------------------------------------------------------
                                                doProcessSimple
-------------------------------------------------------------*/
void CSickLaserUSB::doProcessSimple(
        bool& outThereIsObservation,
        mrpt::obs::CObservation2DRangeScan& outObservation, bool& hardwareError)
{
        outThereIsObservation = false;
        hardwareError = false;
 
        if (!checkControllerIsConnected())
        {
                hardwareError = true;
                return;
        }
 
        vector<float> ranges;
        unsigned char LMS_stat;
        uint32_t board_timestamp;
        bool is_mm_mode;
 
        m_state = ssWorking;
 
        // Wait for a scan:
        if (!waitContinuousSampleFrame(
                        ranges, LMS_stat, board_timestamp, is_mm_mode))
                return;
 
        // Yes, we have a new scan:
 
        // -----------------------------------------------
        //   Extract the observation:
        // -----------------------------------------------
        uint32_t AtUI = 0;
        if (m_timeStartUI == 0)
        {
                m_timeStartUI = board_timestamp;
                m_timeStartTT = mrpt::system::now();
        }
        else
                AtUI = board_timestamp - m_timeStartUI;
 
        mrpt::system::TTimeStamp AtDO =
                mrpt::system::secondsToTimestamp(AtUI * 1e-3 /* Board time is ms */);
        outObservation.timestamp =
                m_timeStartTT + AtDO -
                mrpt::system::secondsToTimestamp(
                        0.05);  // 50 ms delay for scan sending from the scanner
 
        outObservation.sensorLabel = m_sensorLabel;  // Set label
 
        // Extract the timestamp of the sensor:
 
        // And the scan ranges:
        outObservation.rightToLeft = true;
        outObservation.aperture = M_PIf;
        outObservation.maxRange = is_mm_mode ? 32.7 : 81.0;
        outObservation.stdError = 0.003f;
        outObservation.sensorPose = m_sensorPose;
 
        outObservation.resizeScan(ranges.size());
 
        for (size_t i = 0; i < ranges.size(); i++)
        {
                outObservation.setScanRange(i, ranges[i]);
                outObservation.setScanRangeValidity(
                        i, (ranges[i] <= outObservation.maxRange));
        }
 
        // Do filter:
        C2DRangeFinderAbstract::filterByExclusionAreas(outObservation);
        C2DRangeFinderAbstract::filterByExclusionAngles(outObservation);
        // Do show preview:
        C2DRangeFinderAbstract::processPreview(outObservation);
 
        outThereIsObservation = true;
}
 
/*-------------------------------------------------------------
                                                loadConfig_sensorSpecific
-------------------------------------------------------------*/
void CSickLaserUSB::loadConfig_sensorSpecific(
        const mrpt::utils::CConfigFileBase& configSource,
        const std::string& iniSection)
{
        m_serialNumber = configSource.read_string(
                iniSection, "SICKUSB_serialNumber", m_serialNumber);
        m_sensorPose = CPose3D(
                configSource.read_float(iniSection, "pose_x", 0),
                configSource.read_float(iniSection, "pose_y", 0),
                configSource.read_float(iniSection, "pose_z", 0),
                DEG2RAD(configSource.read_float(iniSection, "pose_yaw", 0)),
                DEG2RAD(configSource.read_float(iniSection, "pose_pitch", 0)),
                DEG2RAD(configSource.read_float(iniSection, "pose_roll", 0)));
        // Parent options:
        C2DRangeFinderAbstract::loadCommonParams(configSource, iniSection);
}
 
/*-------------------------------------------------------------
                                                turnOn
-------------------------------------------------------------*/
bool CSickLaserUSB::turnOn() { return true; }
/*-------------------------------------------------------------
                                                turnOff
-------------------------------------------------------------*/
bool CSickLaserUSB::turnOff() { return true; }
/*-------------------------------------------------------------
                                        checkControllerIsConnected
-------------------------------------------------------------*/
bool CSickLaserUSB::checkControllerIsConnected()
{
        // If device is already open, thats ok:
        if (m_usbConnection->isOpen()) return true;
 
        // If it isn't, try to open it now:
        try
        {
                m_usbConnection->OpenBySerialNumber(m_serialNumber);
                m_usbConnection->ResetDevice();
                std::this_thread::sleep_for(10ms);
                m_usbConnection->SetTimeouts(10, 20);  // read, write, in milliseconds
                std::this_thread::sleep_for(10ms);
                m_usbConnection->SetLatencyTimer(1);  // 1ms, the minimum
                std::this_thread::sleep_for(10ms);
 
                MRPT_LOG_INFO_FMT(
                        "[CSickLaserUSB] USB DEVICE S/N:'%s' OPEN SUCCESSFULLY!!!\n",
                        m_serialNumber.c_str());
                return true;
        }
        catch (std::exception& e)
        {
                MRPT_LOG_ERROR_FMT(
                        "[CSickLaserUSB] ERROR TRYING TO OPEN USB DEVICE S/N:'%s'\n%s",
                        m_serialNumber.c_str(), e.what());
                return false;
        }
}
 
/*-------------------------------------------------------------
                                        waitContinuousSampleFrame
-------------------------------------------------------------*/
bool CSickLaserUSB::waitContinuousSampleFrame(
        vector<float>& out_ranges_meters, unsigned char& LMS_status,
        uint32_t& out_board_timestamp, bool& is_mm_mode)
{
        size_t nRead, nBytesToRead;
        size_t nFrameBytes = 0;
        size_t lenghtField;
        unsigned char buf[2000];
        buf[2] = buf[3] = 0;
 
        while (nFrameBytes < (lenghtField = (6 + (buf[2] | (buf[3] << 8)))) +
                                                         5 /* for 32bit timestamp + end-flag */)
        {
                if (lenghtField > 800)
                {
                        cout << "#";
                        nFrameBytes = 0;  // No es cabecera de trama correcta
                        buf[2] = buf[3] = 0;
                }
 
                if (nFrameBytes < 4)
                        nBytesToRead = 1;
                else
                        nBytesToRead =
                                (5 /* for 32bit timestamp + end-flag */ + lenghtField) -
                                nFrameBytes;
 
                try
                {
                        nRead = m_usbConnection->ReadSync(buf + nFrameBytes, nBytesToRead);
                }
                catch (std::exception& e)
                {
                        // Disconnected?
                        MRPT_LOG_ERROR_FMT(
                                "[CSickLaserUSB::waitContinuousSampleFrame] Disconnecting due "
                                "to comms error: %s\n",
                                e.what());
                        m_usbConnection->Close();
                        m_timeStartUI = 0;
                        return false;
                }
 
                if (nRead == 0 && nFrameBytes == 0) return false;
 
                if (nRead > 0)
                {
                        // Lectura OK:
                        // Era la primera?
                        if (nFrameBytes > 1 || (!nFrameBytes && buf[0] == 0x02) ||
                                (nFrameBytes == 1 && buf[1] == 0x80))
                                nFrameBytes += nRead;
                        else
                        {
                                nFrameBytes = 0;  // No es cabecera de trama correcta
                                buf[2] = buf[3] = 0;
                        }
                }
        }
 
        // Frame received
        // --------------------------------------------------------------------------
        // | STX | ADDR | L1 | L2 | COM | INF1 | INF2 | DATA    | STA | CRC1 | CRC2
        // |
        // --------------------------------------------------------------------------
 
        // Trama completa:
        //  Checkear que el byte de comando es 0xB0:
        if (buf[4] != 0xB0) return false;
 
        // GET FRAME INFO
        int info = buf[5] | (buf[6] << 8);  // Little Endian
        int n_points = info & 0x01FF;
        is_mm_mode = 0 != ((info & 0xC000) >> 14);  // 0x00: cm 0x01: mm
 
        out_ranges_meters.resize(n_points);
 
        // Copiar rangos:
        short mask = is_mm_mode ? 0x7FFF : 0x1FFF;
        float meters_scale = is_mm_mode ? 0.001f : 0.01f;
 
        for (int i = 0; i < n_points; i++)
                out_ranges_meters[i] =
                        ((buf[7 + i * 2] | (buf[8 + i * 2] << 8)) & mask) * meters_scale;
 
        // Status
        LMS_status = buf[lenghtField - 3];
 
        // End frame:
        if (buf[nFrameBytes - 1] != 0x55)
        {
// cerr << format("[CSickLaserUSB::waitContinuousSampleFrame] bad end flag") <<
// endl;
#ifdef MRPT_OS_WINDOWS
                OutputDebugStringA(
                        "[CSickLaserUSB::waitContinuousSampleFrame] bad end flag\n");
#endif
                return false;  // Bad CRC
        }
 
        // CRC:
        const uint16_t CRC = mrpt::utils::compute_CRC16(buf, lenghtField - 2);
        const uint16_t CRC_packet =
                buf[lenghtField - 2] | (buf[lenghtField - 1] << 8);
        if (CRC_packet != CRC)
        {
                const string s = format(
                        "[CSickLaserUSB::waitContinuousSampleFrame] bad CRC len=%u "
                        "nptns=%u: %i != %i\n",
                        unsigned(lenghtField), unsigned(n_points), CRC_packet, CRC);
                cerr << s;
#ifdef MRPT_OS_WINDOWS
                OutputDebugStringA(s.c_str());
#endif
                return false;  // Bad CRC
        }
 
        // Get USB board timestamp:
        out_board_timestamp = (uint32_t(buf[nFrameBytes - 5]) << 24) |
                                                  (uint32_t(buf[nFrameBytes - 4]) << 16) |
                                                  (uint32_t(buf[nFrameBytes - 3]) << 8) |
                                                  uint32_t(buf[nFrameBytes - 2]);
 
        // All OK
        return true;
}