cps_microros_imu/firmware/lib/imu/default_imu.h

// Copyright (c) 2021 Juan Miguel Jimeno
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifndef DEFAULT_IMU
#define DEFAULT_IMU

//include IMU base interface
#include "imu_interface.h"

//include sensor API headers
#include "I2Cdev.h"
#include "ADXL345.h"
#include "ITG3200.h"
#include "HMC5883L.h"
#include "MPU6050.h"
#include "MPU9150.h"
#include "MPU9250.h"
#include "MPU9250_WE.h"

class GY85IMU: public IMUInterface 
{
    private:
        //constants specific to the sensor
        const float accel_scale_ = 1 / 256.0;
        const float gyro_scale_ = 1 / 14.375;

        // driver objects to be used
        ADXL345 accelerometer_;
        ITG3200 gyroscope_;

        // returned vector for sensor reading
        geometry_msgs__msg__Vector3 accel_;
        geometry_msgs__msg__Vector3 gyro_;

    public:
        GY85IMU()
        {
            // accel_cov_ = 0.001; //you can overwrite the convariance values here
            // gyro_cov_ = 0.001; //you can overwrite the convariance values here
        }

        bool startSensor() override
        {
            // here you can override startSensor() function and use the sensor's driver API
            // to initialize and test the sensor's connection during boot time
            Wire.begin();
            bool ret;
            accelerometer_.initialize();
            ret = accelerometer_.testConnection();
            if(!ret)
                return false;

            gyroscope_.initialize();
            ret = gyroscope_.testConnection();
            if(!ret)
                return false;

            return true;
        }

        geometry_msgs__msg__Vector3 readAccelerometer() override
        {
            // here you can override readAccelerometer function and use the sensor's driver API
            // to grab the data from accelerometer and return as a Vector3 object
            int16_t ax, ay, az;
            
            accelerometer_.getAcceleration(&ax, &ay, &az);

            accel_.x = ax * (double) accel_scale_ * g_to_accel_;
            accel_.y = ay * (double) accel_scale_ * g_to_accel_;
            accel_.z = az * (double) accel_scale_ * g_to_accel_;

            return accel_;
        }

        geometry_msgs__msg__Vector3 readGyroscope() override
        {
            // here you can override readAccelerometer function and use the sensor's driver API
            // to grab the data from gyroscope and return as a Vector3 object
            int16_t gx, gy, gz;

            gyroscope_.getRotation(&gx, &gy, &gz);

            gyro_.x = gx * (double) gyro_scale_ * DEG_TO_RAD;
            gyro_.y = gy * (double) gyro_scale_ * DEG_TO_RAD;
            gyro_.z = gz * (double) gyro_scale_ * DEG_TO_RAD;

            return gyro_;
        }
};


class MPU6050IMU: public IMUInterface 
{
    private:
        const float accel_scale_ = 1 / 16384.0;
        const float gyro_scale_ = 1 / 131.0;

        MPU6050 accelerometer_;
        MPU6050 gyroscope_;

        geometry_msgs__msg__Vector3 accel_;
        geometry_msgs__msg__Vector3 gyro_;

    public:
        MPU6050IMU()
        {
        }

        bool startSensor() override
        {
            Wire.begin();
            bool ret;
            accelerometer_.initialize();
            ret = accelerometer_.testConnection();
            if(!ret)
                return false;

            gyroscope_.initialize();
            ret = gyroscope_.testConnection();
            if(!ret)
                return false;

            return true;
        }

        geometry_msgs__msg__Vector3 readAccelerometer() override
        {
            int16_t ax, ay, az;
            
            accelerometer_.getAcceleration(&ax, &ay, &az);

            accel_.x = ax * (double) accel_scale_ * g_to_accel_;
            accel_.y = ay * (double) accel_scale_ * g_to_accel_;
            accel_.z = az * (double) accel_scale_ * g_to_accel_;

            return accel_;
        }

        geometry_msgs__msg__Vector3 readGyroscope() override
        {
            int16_t gx, gy, gz;

            gyroscope_.getRotation(&gx, &gy, &gz);

            gyro_.x = gx * (double) gyro_scale_ * DEG_TO_RAD;
            gyro_.y = gy * (double) gyro_scale_ * DEG_TO_RAD;
            gyro_.z = gz * (double) gyro_scale_ * DEG_TO_RAD;

            return gyro_;
        }
};

class MPU9150IMU: public IMUInterface 
{
    private:
        const float accel_scale_ = 1 / 16384.0;
        const float gyro_scale_ = 1 / 131.0;

        MPU9150 accelerometer_;
        MPU9150 gyroscope_;

        geometry_msgs__msg__Vector3 accel_;
        geometry_msgs__msg__Vector3 gyro_;

    public:
        MPU9150IMU()
        {
        }

        bool startSensor() override
        {
            Wire.begin();
            bool ret;
            accelerometer_.initialize();
            ret = accelerometer_.testConnection();
            if(!ret)
                return false;

            gyroscope_.initialize();
            ret = gyroscope_.testConnection();
            if(!ret)
                return false;

            return true;
        }

        geometry_msgs__msg__Vector3 readAccelerometer() override
        {
            int16_t ax, ay, az;
            
            accelerometer_.getAcceleration(&ax, &ay, &az);

            accel_.x = ax * (double) accel_scale_ * g_to_accel_;
            accel_.y = ay * (double) accel_scale_ * g_to_accel_;
            accel_.z = az * (double) accel_scale_ * g_to_accel_;

            return accel_;
        }

        geometry_msgs__msg__Vector3 readGyroscope() override
        {
            int16_t gx, gy, gz;

            gyroscope_.getRotation(&gx, &gy, &gz);

            gyro_.x = gx * (double) gyro_scale_ * DEG_TO_RAD;
            gyro_.y = gy * (double) gyro_scale_ * DEG_TO_RAD;
            gyro_.z = gz * (double) gyro_scale_ * DEG_TO_RAD;

            return gyro_;
        }
};

class MPU9250IMU: public IMUInterface 
{
    private:
        const float accel_scale_ = 1 / 16384.0;
        const float gyro_scale_ = 1 / 131.0;

        MPU9250 accelerometer_;
        MPU9250 gyroscope_;

        geometry_msgs__msg__Vector3 accel_;
        geometry_msgs__msg__Vector3 gyro_;

    public:
        MPU9250IMU()
        {
        }

        bool startSensor() override
        {
            Wire.begin();
            bool ret;
            accelerometer_.initialize();
            ret = accelerometer_.testConnection();
            if(!ret)
                return false;

            gyroscope_.initialize();
            ret = gyroscope_.testConnection();
            if(!ret)
                return false;

            return true;
        }

        geometry_msgs__msg__Vector3 readAccelerometer() override
        {
            int16_t ax, ay, az;
            
            accelerometer_.getAcceleration(&ax, &ay, &az);

            accel_.x = ax * (double) accel_scale_ * g_to_accel_;
            accel_.y = ay * (double) accel_scale_ * g_to_accel_;
            accel_.z = az * (double) accel_scale_ * g_to_accel_;

            return accel_;
        }

        geometry_msgs__msg__Vector3 readGyroscope() override
        {
            int16_t gx, gy, gz;

            gyroscope_.getRotation(&gx, &gy, &gz);

            gyro_.x = gx * (double) gyro_scale_ * DEG_TO_RAD;
            gyro_.y = gy * (double) gyro_scale_ * DEG_TO_RAD;
            gyro_.z = gz * (double) gyro_scale_ * DEG_TO_RAD;

            return gyro_;
        }
};

class MPU9250IMU_WE: public IMUInterface 
{
    private:
        const float accel_scale_ = 1 / 16384.0;
        const float gyro_scale_ = 1 / 131.0;

        MPU9250_WE accelerometer_;
        MPU9250_WE gyroscope_;

        geometry_msgs__msg__Vector3 accel_;
        geometry_msgs__msg__Vector3 gyro_;

    public:
        MPU9250IMU_WE()
        {
        }

        bool startSensor() override
        {
            Wire.begin();
            bool ret;
            accelerometer_.init();
            ret = accelerometer_.init();
            if(!ret)
                return false;

            gyroscope_.init();
            ret = gyroscope_.init();
            if(!ret)
                return false;

            return true;
        }

        geometry_msgs__msg__Vector3 readAccelerometer() override
        {
            //int16_t ax, ay, az;
                
            xyzFloat xyz_Gval = accelerometer_.getGValues();
            // ax = static_cast<int>(xyz_Gval.x); // Convert x to an integer
            // ay = static_cast<int>(xyz_Gval.y); // Convert y to an integer
            // az = static_cast<int>(xyz_Gval.z); // Convert z to an integer

            float ax = xyz_Gval.x; // Convert x to an integer
            float ay = xyz_Gval.y; // Convert y to an integer
            float az = xyz_Gval.z; // Convert z to an integer

            accel_.x = ax * (double) accel_scale_ * g_to_accel_;
            accel_.y = ay * (double) accel_scale_ * g_to_accel_;
            accel_.z = az * (double) accel_scale_ * g_to_accel_;

            return accel_;
        }

        geometry_msgs__msg__Vector3 readGyroscope() override
        {
            //int16_t gx, gy, gz;

            xyzFloat xyz_gyr = gyroscope_.getGyrValues();
            // gx = static_cast<int>(xyz_gyr.x); // Convert x to an integer
            // gy = static_cast<int>(xyz_gyr.y); // Convert y to an integer
            // gz = static_cast<int>(xyz_gyr.z); // Convert z to an integer

            float gx = xyz_gyr.x; // Convert x to an integer
            float gy = xyz_gyr.y; // Convert y to an integer
            float gz = xyz_gyr.z; // Convert z to an integer

            gyro_.x = gx * (double) gyro_scale_ * DEG_TO_RAD;
            gyro_.y = gy * (double) gyro_scale_ * DEG_TO_RAD;
            gyro_.z = gz * (double) gyro_scale_ * DEG_TO_RAD;

            return gyro_;
        }
};

class FakeIMU: public IMUInterface 
{
    private:
        geometry_msgs__msg__Vector3 accel_;
        geometry_msgs__msg__Vector3 gyro_;

    public:
        FakeIMU()
        {
        }

        bool startSensor() override
        {
            return true;
        }

        geometry_msgs__msg__Vector3 readAccelerometer() override
        {
            return accel_;
        }

        geometry_msgs__msg__Vector3 readGyroscope() override
        {
            return gyro_;
        }
};

#endif
//ADXL345 https://www.sparkfun.com/datasheets/Sensors/Accelerometer/ADXL345.pdf
//HMC8553L https://cdn-shop.adafruit.com/datasheets/HMC5883L_3-Axis_Digital_Compass_IC.pdf
//ITG320 https://www.sparkfun.com/datasheets/Sensors/Gyro/PS-ITG-3200-00-01.4.pdf


//MPU9150 https://www.invensense.com/wp-content/uploads/2015/02/PS-MPU-9250A-01-v1.1.pdf
//MPU9250 https://www.invensense.com/wp-content/uploads/2015/02/MPU-9150-Datasheet.pdf
//MPU6050 https://store.invensense.com/datasheets/invensense/MPU-6050_DataSheet_V3%204.pdf

//http://www.sureshjoshi.com/embedded/invensense-imus-what-to-know/
//https://stackoverflow.com/questions/19161872/meaning-of-lsb-unit-and-unit-lsb