ardupilot/libraries/AP_Baro/AP_Baro_BMP388.h

#pragma once

#include <AP_HAL/AP_HAL.h>
#include <AP_HAL/Device.h>
#include <AP_HAL/utility/OwnPtr.h>

#include "AP_Baro_Backend.h"

#ifndef HAL_BARO_BMP388_I2C_ADDR
 #define HAL_BARO_BMP388_I2C_ADDR  (0x76)
#endif
#ifndef HAL_BARO_BMP388_I2C_ADDR2
 #define HAL_BARO_BMP388_I2C_ADDR2 (0x77)
#endif

class AP_Baro_BMP388 : public AP_Baro_Backend
{
public:
    AP_Baro_BMP388(AP_Baro &baro, AP_HAL::OwnPtr<AP_HAL::Device> _dev);

    /* AP_Baro public interface: */
    void update() override;

    static AP_Baro_Backend *probe(AP_Baro &baro, AP_HAL::OwnPtr<AP_HAL::Device> _dev);

private:

    bool init(void);
    void timer(void);
    void update_temperature(uint32_t);
    void update_pressure(uint32_t);

    AP_HAL::OwnPtr<AP_HAL::Device> dev;

    bool has_sample;
    uint8_t instance;
    float pressure;
    float temperature;

    // Internal calibration registers
    struct PACKED {
        int16_t nvm_par_p1; // at 0x36
        int16_t nvm_par_p2;
        int8_t nvm_par_p3;
        int8_t nvm_par_p4;
        int16_t nvm_par_p5;
        int16_t nvm_par_p6;
        int8_t nvm_par_p7;
        int8_t nvm_par_p8;
        int16_t nvm_par_p9;
        int8_t nvm_par_p10;
        int8_t nvm_par_p11;
    } calib_p;

    struct PACKED {
        uint16_t nvm_par_t1; // at 0x31
        uint16_t nvm_par_t2;
        int8_t nvm_par_t3;
    } calib_t;

    // scaled calibration data
    struct {
        float par_t1;
        float par_t2;
        float par_t3;
        float par_p1;
        float par_p2;
        float par_p3;
        float par_p4;
        float par_p5;
        float par_p6;
        float par_p7;
        float par_p8;
        float par_p9;
        float par_p10;
        float par_p11;
        float t_lin;
    } calib;

    void scale_calibration_data(void);
    bool read_registers(uint8_t reg, uint8_t *data, uint8_t len);
};