bmp180.h

Go to the documentation of this file.

/*
 * Copyright (C) 2016 Inria
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */
 
#pragma once

 
#include "saul.h"
#include "periph/i2c.h"
 
#ifdef __cplusplus
extern "C" {
#endif

typedef enum {
    BMP180_ULTRALOWPOWER = 0,
    BMP180_STANDARD,
    BMP180_HIGHRES,
    BMP180_ULTRAHIGHRES
} bmp180_oversampling_mode_t;

typedef struct {
    int16_t ac1;                                
    int16_t ac2;                                
    int16_t ac3;                                
    int16_t b1;                                 
    int16_t b2;                                 
    int16_t mb;                                 
    int16_t mc;                                 
    int16_t md;                                 
    uint16_t ac4;                               
    uint16_t ac5;                               
    uint16_t ac6;                               
} bmp180_calibration_t;

typedef struct {
    i2c_t i2c_dev;                              
    uint8_t i2c_addr;                           
    bmp180_oversampling_mode_t oversampling;    
} bmp180_params_t;

typedef struct {
    bmp180_params_t      params;                
    bmp180_calibration_t calibration;           
} bmp180_t;

enum {
    BMP180_OK = 0,                              
    BMP180_ERR_NODEV,                           
    BMP180_ERR_NOCAL,                           
};

int bmp180_init(bmp180_t *dev, const bmp180_params_t *params);

int16_t bmp180_read_temperature(const bmp180_t *dev);

uint32_t bmp180_read_pressure(const bmp180_t *dev);

int16_t bmp180_altitude(const bmp180_t *dev, uint32_t pressure_0);

uint32_t bmp180_sealevel_pressure(const bmp180_t *dev, int16_t altitude);
 
#ifdef __cplusplus
}
#endif