ms5803.h

/*
 * Author: Jon Trulson <jtrulson@ics.com>
 * Copyright (c) 2016 Intel Corporation.
 *
 * 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 <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <upm.h>

#include <mraa/i2c.h>
#include <mraa/spi.h>
#include <mraa/gpio.h>

#include "ms5803_defs.h"

#ifdef __cplusplus
extern "C" {
#endif

    typedef struct _ms5803_context {
        mraa_i2c_context        i2c;
        mraa_spi_context        spi;
        // CS pin, if we are using one
        mraa_gpio_context       gpio;

        // whether we are doing I2C or SPI
        bool                    isSPI;

        // stored calibration coefficients
        uint16_t                C[MS5803_MAX_COEFFICIENTS];

        // the command sent to chip depending on OSR configuration for
        // temperature and pressure measurement.
        MS5803_CMD_T            temperatureCmd;
        MS5803_OSR_T            temperatureDelay;

        MS5803_CMD_T            pressureCmd;
        MS5803_OSR_T            pressureDelay;

        // compensated temperature in C
        float                   temperature;
        // compensated pressure in millibars
        float                   pressure;
    } *ms5803_context;

    ms5803_context ms5803_init(unsigned int bus, int address, int cs_pin);

    void ms5803_close(ms5803_context dev);

    upm_result_t ms5803_reset(const ms5803_context dev);

    upm_result_t ms5803_update(const ms5803_context dev);

    void ms5803_set_temperature_osr(const ms5803_context dev,
                                    MS5803_OSR_T osr);

    void ms5803_set_pressure_osr(const ms5803_context dev,
                                 MS5803_OSR_T osr);

    float ms5803_get_temperature(const ms5803_context dev);

    float ms5803_get_pressure(const ms5803_context dev);

    upm_result_t ms5803_load_coefficients(const ms5803_context dev);

    upm_result_t ms5803_bus_read(const ms5803_context dev, uint8_t cmd,
                                 uint8_t *data, uint8_t len);

    upm_result_t ms5803_bus_write(const ms5803_context dev, uint8_t cmd,
                                  uint8_t *data, uint8_t len);

#ifdef __cplusplus
}
#endif