UAS.cc

                sinPhi_2 * sinTheta_2 * cosPsi_2);

        mavlink_message_t msg;
        mavlink_msg_hil_state_quaternion_pack(mavlink->getSystemId(), mavlink->getComponentId(), &msg,
                                   time_us, q, rollspeed, pitchspeed, yawspeed,
                                   lat*1e7f, lon*1e7f, alt*1000, vx*100, vy*100, vz*100, ind_airspeed*100, true_airspeed*100, xacc*1000/9.81, yacc*1000/9.81, zacc*1000/9.81);
        _vehicle->sendMessage(msg);
    }
    else
    {
        // Attempt to set HIL mode
        _vehicle->setHilMode(true);
        qDebug() << __FILE__ << __LINE__ << "HIL is onboard not enabled, trying to enable.";
    }
}
#endif

#ifndef __mobile__
float UAS::addZeroMeanNoise(float truth_meas, float noise_var)
{
    /* Calculate normally distributed variable noise with mean = 0 and variance = noise_var.  Calculated according to
    Box-Muller transform */
    static const float epsilon = std::numeric_limits<float>::min(); //used to ensure non-zero uniform numbers
    static float z0; //calculated normal distribution random variables with mu = 0, var = 1;
    float u1, u2;        //random variables generated from c++ rand();

    /*Generate random variables in range (0 1] */
    do
    {
        //TODO seed rand() with srand(time) but srand(time should be called once on startup)
        //currently this will generate repeatable random noise
        u1 = rand() * (1.0 / RAND_MAX);
        u2 = rand() * (1.0 / RAND_MAX);
    }
    while ( u1 <= epsilon );  //Have a catch to ensure non-zero for log()

    z0 = sqrt(-2.0 * log(u1)) * cos(2.0f * M_PI * u2); //calculate normally distributed variable with mu = 0, var = 1

    //TODO add bias term that changes randomly to simulate accelerometer and gyro bias the exf should handle these
    //as well
    float noise = z0 * sqrt(noise_var); //calculate normally distributed variable with mu = 0, std = var^2

    //Finally gaurd against any case where the noise is not real
    if(std::isfinite(noise)) {
            return truth_meas + noise;
    } else {
        return truth_meas;
    }
}
#endif

/*
* @param abs_pressure Absolute Pressure (hPa)
* @param diff_pressure Differential Pressure  (hPa)
*/
#ifndef __mobile__
void UAS::sendHilSensors(quint64 time_us, float xacc, float yacc, float zacc, float rollspeed, float pitchspeed, float yawspeed,
                                    float xmag, float ymag, float zmag, float abs_pressure, float diff_pressure, float pressure_alt, float temperature, quint32 fields_changed)
{
    if (!_vehicle) {
        return;
    }

    if (this->base_mode & MAV_MODE_FLAG_HIL_ENABLED)
    {
        float xacc_corrupt = addZeroMeanNoise(xacc, xacc_var);
        float yacc_corrupt = addZeroMeanNoise(yacc, yacc_var);
        float zacc_corrupt = addZeroMeanNoise(zacc, zacc_var);
        float rollspeed_corrupt = addZeroMeanNoise(rollspeed,rollspeed_var);
        float pitchspeed_corrupt = addZeroMeanNoise(pitchspeed,pitchspeed_var);
        float yawspeed_corrupt = addZeroMeanNoise(yawspeed,yawspeed_var);
        float xmag_corrupt = addZeroMeanNoise(xmag, xmag_var);
        float ymag_corrupt = addZeroMeanNoise(ymag, ymag_var);
        float zmag_corrupt = addZeroMeanNoise(zmag, zmag_var);
        float abs_pressure_corrupt = addZeroMeanNoise(abs_pressure,abs_pressure_var);
        float diff_pressure_corrupt = addZeroMeanNoise(diff_pressure, diff_pressure_var);
        float pressure_alt_corrupt = addZeroMeanNoise(pressure_alt, pressure_alt_var);
        float temperature_corrupt = addZeroMeanNoise(temperature,temperature_var);

        mavlink_message_t msg;
        mavlink_msg_hil_sensor_pack(mavlink->getSystemId(), mavlink->getComponentId(), &msg,
                                   time_us, xacc_corrupt, yacc_corrupt, zacc_corrupt, rollspeed_corrupt, pitchspeed_corrupt,
                                    yawspeed_corrupt, xmag_corrupt, ymag_corrupt, zmag_corrupt, abs_pressure_corrupt,
                                    diff_pressure_corrupt, pressure_alt_corrupt, temperature_corrupt, fields_changed);
        _vehicle->sendMessage(msg);
        lastSendTimeSensors = QGC::groundTimeMilliseconds();
    }
    else
    {
        // Attempt to set HIL mode
        _vehicle->setHilMode(true);
        qDebug() << __FILE__ << __LINE__ << "HIL is onboard not enabled, trying to enable.";
    }
}
#endif

#ifndef __mobile__
void UAS::sendHilOpticalFlow(quint64 time_us, qint16 flow_x, qint16 flow_y, float flow_comp_m_x,
                    float flow_comp_m_y, quint8 quality, float ground_distance)
{
    if (!_vehicle) {
        return;
    }

    // FIXME: This needs to be updated for new mavlink_msg_hil_optical_flow_pack api

    Q_UNUSED(time_us);
    Q_UNUSED(flow_x);
    Q_UNUSED(flow_y);
    Q_UNUSED(flow_comp_m_x);
    Q_UNUSED(flow_comp_m_y);
    Q_UNUSED(quality);
    Q_UNUSED(ground_distance);

    if (this->base_mode & MAV_MODE_FLAG_HIL_ENABLED)
    {
#if 0
        mavlink_message_t msg;
        mavlink_msg_hil_optical_flow_pack(mavlink->getSystemId(), mavlink->getComponentId(), &msg,
                                   time_us, 0, 0 /* hack */, flow_x, flow_y, 0.0f /* hack */, 0.0f /* hack */, 0.0f /* hack */, 0 /* hack */, quality, ground_distance);

        _vehicle->sendMessage(msg);
        lastSendTimeOpticalFlow = QGC::groundTimeMilliseconds();
#endif
    }
    else
    {
        // Attempt to set HIL mode
        _vehicle->setHilMode(true);
        qDebug() << __FILE__ << __LINE__ << "HIL is onboard not enabled, trying to enable.";
    }

}
#endif

#ifndef __mobile__
void UAS::sendHilGps(quint64 time_us, double lat, double lon, double alt, int fix_type, float eph, float epv, float vel, float vn, float ve, float vd, float cog, int satellites)
{
    if (!_vehicle) {
        return;
    }

    // Only send at 10 Hz max rate
    if (QGC::groundTimeMilliseconds() - lastSendTimeGPS < 100)
        return;

    if (this->base_mode & MAV_MODE_FLAG_HIL_ENABLED)
    {
        float course = cog;
        // map to 0..2pi
        if (course < 0)
            course += 2.0f * static_cast<float>(M_PI);
        // scale from radians to degrees
        course = (course / M_PI) * 180.0f;

        mavlink_message_t msg;
        mavlink_msg_hil_gps_pack(mavlink->getSystemId(), mavlink->getComponentId(), &msg,
                                   time_us, fix_type, lat*1e7, lon*1e7, alt*1e3, eph*1e2, epv*1e2, vel*1e2, vn*1e2, ve*1e2, vd*1e2, course*1e2, satellites);
        lastSendTimeGPS = QGC::groundTimeMilliseconds();
        _vehicle->sendMessage(msg);
    }
    else
    {
        // Attempt to set HIL mode
        _vehicle->setHilMode(true);
        qDebug() << __FILE__ << __LINE__ << "HIL is onboard not enabled, trying to enable.";
    }
}
#endif

/**
* Connect flight gear link.
**/
#ifndef __mobile__
void UAS::startHil()
{
    if (hilEnabled) return;
    hilEnabled = true;
    sensorHil = false;
    _vehicle->setHilMode(true);
    qDebug() << __FILE__ << __LINE__ << "HIL is onboard not enabled, trying to enable.";
    // Connect HIL simulation link
    simulation->connectSimulation();
}
#endif

/**
* disable flight gear link.
*/
#ifndef __mobile__
void UAS::stopHil()
{
   if (simulation && simulation->isConnected()) {
       simulation->disconnectSimulation();
       _vehicle->setHilMode(false);
       qDebug() << __FILE__ << __LINE__ << "HIL is onboard not enabled, trying to disable.";
   }
    hilEnabled = false;
    sensorHil = false;
}
#endif

/**
* @rerturn the map of the components
*/
QMap<int, QString> UAS::getComponents()
{
    return components;
}

/**
 * @return charge level in percent - 0 - 100
 */
float UAS::getChargeLevel()
{
    return chargeLevel;
}

void UAS::startLowBattAlarm()
{
    if (!lowBattAlarm)
    {
        _say(tr("System %1 has low battery").arg(getUASID()));
        lowBattAlarm = true;
    }
}

void UAS::stopLowBattAlarm()
{
    if (lowBattAlarm)
    {
        lowBattAlarm = false;
    }
}

void UAS::sendMapRCToParam(QString param_id, float scale, float value0, quint8 param_rc_channel_index, float valueMin, float valueMax)
{
    if (!_vehicle) {
        return;
    }

    mavlink_message_t message;

    char param_id_cstr[MAVLINK_MSG_PARAM_MAP_RC_FIELD_PARAM_ID_LEN] = {};
    // Copy string into buffer, ensuring not to exceed the buffer size
    for (unsigned int i = 0; i < sizeof(param_id_cstr); i++)
    {
        if ((int)i < param_id.length())
        {
            param_id_cstr[i] = param_id.toLatin1()[i];
        }
    }

    mavlink_msg_param_map_rc_pack(mavlink->getSystemId(),
                                  mavlink->getComponentId(),
                                  &message,
                                  this->uasId,
                                  0,
                                  param_id_cstr,
                                  -1,
                                  param_rc_channel_index,
                                  value0,
                                  scale,
                                  valueMin,
                                  valueMax);
    _vehicle->sendMessage(message);
    qDebug() << "Mavlink message sent";
}

void UAS::unsetRCToParameterMap()
{
    if (!_vehicle) {
        return;
    }

    char param_id_cstr[MAVLINK_MSG_PARAM_MAP_RC_FIELD_PARAM_ID_LEN] = {};

    for (int i = 0; i < 3; i++) {
        mavlink_message_t message;
        mavlink_msg_param_map_rc_pack(mavlink->getSystemId(),
                                      mavlink->getComponentId(),
                                      &message,
                                      this->uasId,
                                      0,
                                      param_id_cstr,
                                      -2,
                                      i,
                                      0.0f,
                                      0.0f,
                                      0.0f,
                                      0.0f);
        _vehicle->sendMessage(message);
    }
}

void UAS::_say(const QString& text, int severity)
{
    if (!qgcApp()->runningUnitTests())
        qgcApp()->toolbox()->audioOutput()->say(text, severity);
}