bmp388_i2c.cpp
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/****************************************************************************
*
* Copyright (c) 2019 PX4 Development Team. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name PX4 nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/**
* @file bmp388_i2c.cpp
*
* I2C interface for BMP388
*/
#include <drivers/device/i2c.h>
#include "bmp388.h"
class BMP388_I2C: public device::I2C, public IBMP388
{
public:
BMP388_I2C(uint8_t bus, uint32_t device, int bus_frequency);
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);
calibration_s *get_calibration(uint8_t addr);
uint32_t get_device_id() const override { return device::I2C::get_device_id(); }
uint8_t get_device_address() const override { return device::I2C::get_device_address(); }
private:
struct calibration_s _cal;
};
IBMP388 *bmp388_i2c_interface(uint8_t busnum, uint32_t device, int bus_frequency)
{
return new BMP388_I2C(busnum, device, bus_frequency);
}
BMP388_I2C::BMP388_I2C(uint8_t bus, uint32_t device, int bus_frequency) :
I2C(DRV_BARO_DEVTYPE_BMP388, MODULE_NAME, bus, device, bus_frequency)
{
}
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);
}
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;
}
}