/*
 * This file is part of the BMP280 project.
 * Copyright 2021 Edward V. Emelianov <edward.emelianoff@gmail.com>.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#pragma once
#include <stdint.h>

#define BMP280_I2C_ADDRESS     (0x76)

#define BMP280_CHIP_ID  0x58
#define BME280_CHIP_ID  0x60

typedef enum{ // K for filtering: next = [prev*(k-1) + data_ADC]/k
    BMP280_FILTER_OFF = 0, // k=1, no filtering
    BMP280_FILTER_2   = 1, // k=2, 2 samples to reach >75% of data_ADC
    BMP280_FILTER_4   = 2, // k=4, 5 samples
    BMP280_FILTER_8   = 3, // k=8, 11 samples
    BMP280_FILTER_16  = 4, // k=16, 22 samples
    BMP280_FILTERMAX
} BMP280_Filter;

typedef enum{ // Number of oversampling
    BMP280_NOMEASUR = 0,
    BMP280_OVERS1   = 1,
    BMP280_OVERS2   = 2,
    BMP280_OVERS4   = 3,
    BMP280_OVERS8   = 4,
    BMP280_OVERS16  = 5,
    BMP280_OVERSMAX
} BMP280_Oversampling;

typedef enum{
    BMP280_NOTINIT,     // wasn't inited
    BMP280_BUSY,        // measurement in progress
    BMP280_ERR,         // error in I2C
    BMP280_RELAX,       // relaxed state
    BMP280_RDY,         // data ready - can get it
} BMP280_status;

int BMP280_reset();
int BMP280_init();
void BMP280_read_ID(uint8_t *devid);
void BMP280_setfilter(BMP280_Filter f);
void BMP280_setOSt(BMP280_Oversampling os);
void BMP280_setOSp(BMP280_Oversampling os);
// BME280 (humidity)
void BMP280_setOSh(BMP280_Oversampling os);
BMP280_status BMP280_get_status();
int BMP280_start();
void BMP280_process();
int BMP280_getdata(float *T, float *P, float *H);