bmp388_i2c.cpp

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/**
 * @file bmp388_i2c.cpp
 *
 * I2C interface for BMP388
 */

#include <drivers/device/i2c.h>

#include "bmp388.h"

#if defined(PX4_I2C_OBDEV_BMP388) || defined(PX4_I2C_EXT_OBDEV_BMP388)

class BMP388_I2C: public device::I2C, public IBMP388
{
public:
    BMP388_I2C(uint8_t bus, uint32_t device);
    virtual ~BMP388_I2C() = default;

    int init();

    uint8_t get_reg(uint8_t addr);
    int get_reg_buf(uint8_t addr, uint8_t *buf, uint8_t len);
    int set_reg(uint8_t value, uint8_t addr);
    data_s *get_data(uint8_t addr);
    calibration_s *get_calibration(uint8_t addr);

    uint32_t get_device_id() const override { return device::I2C::get_device_id(); }

private:
    struct calibration_s _cal;
    struct data_s _data;
};

IBMP388 *bmp388_i2c_interface(uint8_t busnum, uint32_t device)
{
    return new BMP388_I2C(busnum, device);
}

BMP388_I2C::BMP388_I2C(uint8_t bus, uint32_t device) :
    I2C("BMP388_I2C", nullptr, bus, device, 100 * 1000)
{
}

int BMP388_I2C::init()
{
    return I2C::init();
}

uint8_t BMP388_I2C::get_reg(uint8_t addr)
{
    uint8_t cmd[2] = { (uint8_t)(addr), 0};
    transfer(&cmd[0], 1, &cmd[1], 1);

    return cmd[1];
}

int BMP388_I2C::get_reg_buf(uint8_t addr, uint8_t *buf, uint8_t len)
{
    const uint8_t cmd = (uint8_t)(addr);
    return transfer(&cmd, sizeof(cmd), buf, len);
}

int BMP388_I2C::set_reg(uint8_t value, uint8_t addr)
{
    uint8_t cmd[2] = { (uint8_t)(addr), value};
    return transfer(cmd, sizeof(cmd), nullptr, 0);
}

data_s *BMP388_I2C::get_data(uint8_t addr)
{
    const uint8_t cmd = (uint8_t)(addr);

    if (transfer(&cmd, sizeof(cmd), (uint8_t *)&_data, sizeof(struct data_s)) == OK) {
        return (&_data);

    } else {
        return nullptr;
    }
}

calibration_s *BMP388_I2C::get_calibration(uint8_t addr)
{
    const uint8_t cmd = (uint8_t)(addr);

    if (transfer(&cmd, sizeof(cmd), (uint8_t *)&_cal, sizeof(struct calibration_s)) == OK) {
        return &(_cal);

    } else {
        return nullptr;
    }
}

#endif /* PX4_I2C_OBDEV_BMP388 || PX4_I2C_EXT_OBDEV_BMP388 */