bmp280.h
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/****************************************************************************
*
* Copyright (C) 2016-2019 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 bmp280.h
*
* Shared defines for the bmp280 driver.
*/
#pragma once
#include <drivers/device/spi.h>
#include <inttypes.h>
#define BMP280_ADDR_CAL 0x88 /* address of 12x 2 bytes calibration data */
#define BMP280_ADDR_DATA 0xF7 /* address of 2x 3 bytes p-t data */
#define BMP280_ADDR_CONFIG 0xF5 /* configuration */
#define BMP280_ADDR_CTRL 0xF4 /* controll */
#define BMP280_ADDR_STATUS 0xF3 /* state */
#define BMP280_ADDR_RESET 0xE0 /* reset */
#define BMP280_ADDR_ID 0xD0 /* id */
#define BMP280_VALUE_ID 0x58 /* chip id */
#define BMP280_VALUE_RESET 0xB6 /* reset */
#define BMP280_STATUS_MEASURING (1<<3) /* if in process of measure */
#define BMP280_STATUS_COPING (1<<0) /* if in process of data copy */
#define BMP280_CTRL_P0 (0x0<<2) /* no p measure */
#define BMP280_CTRL_P1 (0x1<<2)
#define BMP280_CTRL_P2 (0x2<<2)
#define BMP280_CTRL_P4 (0x3<<2)
#define BMP280_CTRL_P8 (0x4<<2)
#define BMP280_CTRL_P16 (0x5<<2)
#define BMP280_CTRL_T0 (0x0<<5) /* no t measure */
#define BMP280_CTRL_T1 (0x1<<5)
#define BMP280_CTRL_T2 (0x2<<5)
#define BMP280_CTRL_T4 (0x3<<5)
#define BMP280_CTRL_T8 (0x4<<5)
#define BMP280_CTRL_T16 (0x5<<5)
#define BMP280_CONFIG_F0 (0x0<<2) /* no filter */
#define BMP280_CONFIG_F2 (0x1<<2)
#define BMP280_CONFIG_F4 (0x2<<2)
#define BMP280_CONFIG_F8 (0x3<<2)
#define BMP280_CONFIG_F16 (0x4<<2)
#define BMP280_CTRL_MODE_SLEEP 0x0
#define BMP280_CTRL_MODE_FORCE 0x1 /* on demand, goes to sleep after */
#define BMP280_CTRL_MODE_NORMAL 0x3
#define BMP280_MT_INIT 6400 /* max measure time of initial p + t in us */
#define BMP280_MT 2300 /* max measure time of p or t in us */
namespace bmp280
{
#pragma pack(push,1)
struct calibration_s {
uint16_t t1;
int16_t t2;
int16_t t3;
uint16_t p1;
int16_t p2;
int16_t p3;
int16_t p4;
int16_t p5;
int16_t p6;
int16_t p7;
int16_t p8;
int16_t p9;
}; //calibration data
struct data_s {
uint8_t p_msb;
uint8_t p_lsb;
uint8_t p_xlsb;
uint8_t t_msb;
uint8_t t_lsb;
uint8_t t_xlsb;
}; // data
#pragma pack(pop)
struct fcalibration_s {
float t1;
float t2;
float t3;
float p1;
float p2;
float p3;
float p4;
float p5;
float p6;
float p7;
float p8;
float p9;
};
class IBMP280
{
public:
virtual ~IBMP280() = default;
virtual int init() = 0;
// read reg value
virtual uint8_t get_reg(uint8_t addr) = 0;
// write reg value
virtual int set_reg(uint8_t value, uint8_t addr) = 0;
// bulk read of data into buffer, return same pointer
virtual bmp280::data_s *get_data(uint8_t addr) = 0;
// bulk read of calibration data into buffer, return same pointer
virtual bmp280::calibration_s *get_calibration(uint8_t addr) = 0;
virtual uint32_t get_device_id() const = 0;
virtual uint8_t get_device_address() const = 0;
};
} /* namespace */
/* interface factories */
extern bmp280::IBMP280 *bmp280_spi_interface(uint8_t busnum, uint32_t device, int bus_frequency, spi_mode_e spi_mode);
extern bmp280::IBMP280 *bmp280_i2c_interface(uint8_t busnum, uint32_t device, int bus_frequency);