bmpx8x.h

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/*
 * Author: Jon Trulson <jtrulson@ics.com>
 * Copyright (c) 2017 Intel Corporation.
 *
 * This driver was rewritten based on the original driver written by:
 * Author: Yevgeniy Kiveisha <yevgeniy.kiveisha@intel.com>
 *
 * The MIT License
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
#pragma once

#include <unistd.h>
#include <string.h>

#include <mraa/i2c.h>

#include "upm.h"

#include "bmpx8x_defs.h"

#ifdef __cplusplus
extern "C" {
#endif


    typedef struct _bmpx8x_context {
        mraa_i2c_context i2c;

        // our oversampling (precision)
        BMPX8X_OSS_T oversampling;

        // compensated temperature and pressure
        float temperature;
        int pressure;

        // compensation coefficients
        int16_t ac1;
        int16_t ac2;
        int16_t ac3;
        uint16_t ac4;
        uint16_t ac5;
        uint16_t ac6;
        int16_t b1;
        int16_t b2;
        int16_t mb;
        int16_t mc;
        int16_t md;
    } *bmpx8x_context;


    bmpx8x_context bmpx8x_init(int bus, int addr);

    void bmpx8x_close(bmpx8x_context dev);

    uint8_t bmpx8x_get_chip_id(const bmpx8x_context dev);

    upm_result_t bmpx8x_devinit(const bmpx8x_context dev,
                                BMPX8X_OSS_T oss);

    upm_result_t bmpx8x_reset(const bmpx8x_context dev);

    upm_result_t bmpx8x_update(const bmpx8x_context dev);

    void bmpx8x_set_oversampling(const bmpx8x_context dev,
                                 BMPX8X_OSS_T oss);

    int bmpx8x_get_pressure(const bmpx8x_context dev);

    float bmpx8x_get_temperature(const bmpx8x_context dev);

    int bmpx8x_get_sealevel_pressure(const bmpx8x_context dev,
                                     float altitude);

    float bmpx8x_get_altitude(const bmpx8x_context dev, int sealevel);

    uint8_t bmpx8x_read_reg(const bmpx8x_context dev, uint8_t reg);

    int bmpx8x_read_regs(const bmpx8x_context dev, uint8_t reg,
                         uint8_t *buffer, int len);

    upm_result_t bmpx8x_write_reg(const bmpx8x_context dev,
                                  uint8_t reg, uint8_t val);

#ifdef __cplusplus
}
#endif