abp.h

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/*
 * Author: Abhishek Malik <abhishek.malik@intel.com>
 * Copyright (c) 2017 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 <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>

#include "upm.h"
#include "mraa/i2c.h"

#ifdef __cplusplus
extern "C" {
#endif

#define ABP_DEFAULT_ADDRESS             0x28
#define OUTPUT_10_PERCENT_COUNT         1638
#define OUTPUT_90_PERCENT_COUNT         14746
#define ABP_PRESSURE_MAX                5
#define ABP_PRESSURE_MIN                0
#define ABP_PRESSURE_HIGH_BYTE_MASK     0x3f
#define ABP_TEMPERATURE_LOW_BYTE_SHIFT  5
#define ABP_TEMPERATURE_MASK            0x7ff

typedef enum {
    NORMAL_OPERATION = 0,
    COMMAND_MODE,
    STALE_DATA,
    DIAGNOSTIC } ABP_STATUS;

typedef struct _abp_context {
    mraa_i2c_context       i2c;
    int                    i2c_bus_number;
    uint8_t                address;
    int                    abp_pressure_max;
    int                    abp_pressure_min;
    uint8_t                readings[4];
    ABP_STATUS             status;
} *abp_context;

abp_context abp_init(int bus, uint8_t dev_address);

void abp_close(abp_context dev);

float abp_get_pressure(abp_context dev);

float abp_get_temperature(abp_context dev);

void abp_set_max_pressure(abp_context dev, int max);

void abp_set_min_pressure(abp_context dev, int min);

upm_result_t abp_update(abp_context dev);

#ifdef __cplusplus
}
#endif