ardupilot/libraries/AP_InertialSensor/AP_InertialSensor_L3G4200D.h

/// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-

#ifndef __AP_INERTIAL_SENSOR_L3G4200D_H__
#define __AP_INERTIAL_SENSOR_L3G4200D_H__

#include <AP_HAL.h>
#if CONFIG_HAL_BOARD == HAL_BOARD_LINUX

#include "AP_InertialSensor.h"
#include <Filter.h>
#include <LowPassFilter2p.h>

class AP_InertialSensor_L3G4200D : public AP_InertialSensor_Backend
{
public:

    AP_InertialSensor_L3G4200D(AP_InertialSensor &imu);

    /* update accel and gyro state */
    bool update();

    bool gyro_sample_available(void) { return _have_gyro_sample; }
    bool accel_sample_available(void) { return _have_accel_sample; }

    // detect the sensor
    static AP_InertialSensor_Backend *detect(AP_InertialSensor &imu);

    // return product ID
    int16_t product_id(void) const { return AP_PRODUCT_ID_L3G4200D; }

private:
    bool            _init_sensor(void);
    void            _accumulate(void);
    Vector3f        _accel_filtered;
    Vector3f        _gyro_filtered;
    volatile bool   _have_gyro_sample;
    volatile bool   _have_accel_sample;

    // support for updating filter at runtime
    uint8_t         _last_filter_hz;

    void _set_filter_frequency(uint8_t filter_hz);

    // Low Pass filters for gyro and accel 
    LowPassFilter2pVector3f _accel_filter;
    LowPassFilter2pVector3f _gyro_filter;

    // gyro and accel instances
    uint8_t _gyro_instance;
    uint8_t _accel_instance;
};
#endif
#endif // __AP_INERTIAL_SENSOR_L3G4200D_H__