CRaePID.cpp

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/* +------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)            |
   |                          http://www.mrpt.org/                          |
   |                                                                        |
   | Copyright (c) 2005-2018, 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/hwdrivers/CRaePID.h>
#include <mrpt/system/datetime.h>

#include <iostream>
#include <iterator>
#include <sstream>
#include <thread>

using namespace std;
using namespace mrpt::hwdrivers;

IMPLEMENTS_GENERIC_SENSOR(CRaePID, mrpt::hwdrivers)

/* -----------------------------------------------------
                Constructor
   ----------------------------------------------------- */
CRaePID::CRaePID() { m_sensorLabel = "RAE_PID"; }
/* -----------------------------------------------------
                loadConfig_sensorSpecific
   ----------------------------------------------------- */
void CRaePID::loadConfig_sensorSpecific(
    const mrpt::config::CConfigFileBase& configSource,
    const std::string& iniSection)
{
#ifdef _WIN32
    com_port =
        configSource.read_string(iniSection, "COM_port_PID", "COM1", true);
#else
    com_port =
        configSource.read_string(iniSection, "COM_port_PID", "/dev/tty0", true);
#endif

    com_bauds = configSource.read_int(iniSection, "baudRate", 9600, false);

    pose_x = configSource.read_float(iniSection, "pose_x", 0, true);
    pose_y = configSource.read_float(iniSection, "pose_y", 0, true);
    pose_z = configSource.read_float(iniSection, "pose_z", 0, true);
    pose_roll = configSource.read_float(iniSection, "pose_roll", 0, true);
    pose_pitch = configSource.read_float(iniSection, "pose_pitch", 0, true);
    pose_yaw = configSource.read_float(iniSection, "pose_yaw", 0, true);
}

/* -----------------------------------------------------
                tryToOpenTheCOM
----------------------------------------------------- */
bool CRaePID::tryToOpenTheCOM()
{
    if (COM.isOpen()) return true;  // Already open

    if (m_verbose)
        cout << "[CRaePID] Opening " << com_port << " @ " << com_bauds << endl;

    try
    {
        COM.open(com_port);
        // Config:
        COM.setConfig(com_bauds, 0, 8, 1);
        // COM.setTimeouts( 1, 0, 1, 1, 1 );
        COM.setTimeouts(50, 1, 100, 1, 20);
        // std::this_thread::sleep_for(10ms);
        COM.purgeBuffers();
        // std::this_thread::sleep_for(10ms);

        return true;  // All OK!
    }
    catch (std::exception& e)
    {
        std::cerr << "[CRaePID::tryToOpenTheCOM] Error opening or configuring "
                     "the serial port:"
                  << std::endl
                  << e.what();
        COM.close();
        return false;
    }
    catch (...)
    {
        std::cerr << "[CRaePID::tryToOpenTheCOM] Error opening or configuring "
                     "the serial port."
                  << std::endl;
        COM.close();
        return false;
    }
}

/* -----------------------------------------------------
                doProcess
----------------------------------------------------- */
void CRaePID::doProcess()
{
    // Is the COM open?
    if (!tryToOpenTheCOM())
    {
        m_state = ssError;
        THROW_EXCEPTION("Cannot open the serial port");
    }

    bool have_reading = false;
    std::string power_reading;
    bool time_out = false;

    while (!have_reading)
    {
        // Send command to PID to request a measurement
        COM.purgeBuffers();
        COM.Write("R", 1);

        // Read PID response
        power_reading = COM.ReadString(500, &time_out);
        if (time_out)
        {
            // cout << "[CRaePID] " << com_port << " @ " <<com_bauds << " -
            // measurement Timed-Out" << endl;
            std::this_thread::sleep_for(10ms);
        }
        else
            have_reading = true;
    }

    // cout << "[CRaePID] " << com_port << " @ " <<com_bauds << " - measurement
    // -> " << power_reading << endl;

    // Convert the text to a number (ppm)
    const float readnum = atof(power_reading.c_str());
    const float val_ppm = readnum / 1000;

    // Fill the observation
    mrpt::obs::CObservationGasSensors::TObservationENose obs;
    obs.readingsVoltage.push_back(val_ppm);
    obs.sensorTypes.push_back(0x0001);

    mrpt::obs::CObservationGasSensors obsG;
    obsG.sensorLabel = this->getSensorLabel();
    obsG.m_readings.push_back(obs);
    obsG.timestamp = mrpt::system::now();

    appendObservation(
        mrpt::obs::CObservationGasSensors::Ptr(
            new mrpt::obs::CObservationGasSensors(obsG)));
}

std::string CRaePID::getFirmware()
{
    // Send the command
    cout << "Firmware version: " << endl;
    COM.purgeBuffers();
    size_t B_written = COM.Write("F", 1);
    if (!B_written) return std::string("COMMS.ERROR");

    // Read the returned text
    bool time_out = false;
    std::string s_read = COM.ReadString(2000, &time_out);
    if (time_out) s_read = "Time_out";
    return s_read;
}

std::string CRaePID::getModel()
{
    // Send the command
    COM.purgeBuffers();
    COM.Write("M", 1);

    // Read the returned text
    return COM.ReadString();
}

std::string CRaePID::getSerialNumber()
{
    // Send the command
    COM.purgeBuffers();
    COM.Write("S", 1);

    // Read the returned text
    return COM.ReadString();
}

std::string CRaePID::getName()
{
    // Send the command
    COM.purgeBuffers();
    COM.Write("N", 1);

    // Read the returned text
    return COM.ReadString();
}

bool CRaePID::switchPower()
{
    // Send the command
    COM.purgeBuffers();
    COM.Write("P", 1);

    // Read the returned text
    std::string reading;
    reading = COM.ReadString();

    if (strcmp(reading.c_str(), "Sleep...") == 0)
        return true;
    else
        return false;
}

mrpt::obs::CObservationGasSensors CRaePID::getFullInfo()
{
    // Send the command
    COM.purgeBuffers();
    COM.Write("C", 1);

    // Read the returned text
    std::string reading;
    reading = COM.ReadString();

    // Iterate over each information component (tokenize first)
    // construct a stream from the string (as seen in
    // http://stackoverflow.com/a/53921)
    std::stringstream readings_str(reading);

    // use stream iterators to copy the stream to the vector as whitespace
    // separated strings
    std::istream_iterator<std::string> it(readings_str);
    std::istream_iterator<std::string> endit;
    std::vector<std::string> measurements_text(it, endit);

    // Convert the text to a number (ppm)
    mrpt::obs::CObservationGasSensors::TObservationENose obs;
    mrpt::obs::CObservationGasSensors obsG;

    for (size_t k = 0; k < measurements_text.size(); k++)
    {
        const float readnum = atof(measurements_text[k].c_str());
        const float val_ppm = readnum / 1000.f;

        // Fill the observation
        obs.readingsVoltage.push_back(val_ppm);
        obsG.m_readings.push_back(obs);
    }

    obsG.sensorLabel = this->getSensorLabel();
    obsG.timestamp = mrpt::system::now();

    return obsG;
}

bool CRaePID::errorStatus(std::string& errorString)
{
    // Send the command
    COM.purgeBuffers();
    COM.Write("E", 1);

    // Read the returned text
    std::string reading;
    reading = COM.ReadString();

    // Tokenize to separate the two components:
    // construct a stream from the string (as seen in
    // http://stackoverflow.com/a/53921)
    std::stringstream readings_str(reading);

    // use stream iterators to copy the stream to the vector as whitespace
    // separated strings
    std::istream_iterator<std::string> it(readings_str);
    std::istream_iterator<std::string> endit;
    std::vector<std::string> errors_text(it, endit);

    // Take the first part and check the possible error condition
    if ((strcmp(errors_text[0].c_str(), "0") == 0) &&
        (strcmp(errors_text[1].c_str(), "0") == 0))  // no error
    {
        return false;
    }
    else
    {
        // By the moment, return the raw error; note that if necessary a
        // detailed description of the error can be obtained analyzing the two
        // error strings separately
        errorString = reading;
        return true;
    }
}

void CRaePID::getLimits(float& min, float& max)
{
    // Send the command
    COM.purgeBuffers();
    COM.Write("L", 1);

    // Read the returned text
    std::string reading;
    reading = COM.ReadString();

    // Tokenize to separate the two components:
    // construct a stream from the string (as seen in
    // http://stackoverflow.com/a/53921)
    std::stringstream readings_str(reading);

    // use stream iterators to copy the stream to the vector as whitespace
    // separated strings
    std::istream_iterator<std::string> it(readings_str);
    std::istream_iterator<std::string> endit;
    std::vector<std::string> readings_text(it, endit);

    // read min and max
    max = atof(readings_text[0].c_str());
    min = atof(readings_text[1].c_str());
}