hdc1000.hpp

/*
 * Author: Norbert Wesp <nwesp@phytec.de>
 * Copyright (c) 2017 Phytec Messtechnik GmbH.
 *
 * based on: RIOT-driver hdc1000 by Johann Fischer <j.fischer@phytec.de>
 *
 * 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 <string>
#include <mraa/i2c.hpp>
#include <math.h>

#define HDC1000_NAME "hdc1000"
#define HDC1000_i2C_ADDRESS         0x43
#define HDC1000_MANUFACTURER_ID     0x5449  /* ID of Texas Instruments */
#define HDC1000_DEVICE_ID           0x1000  /* ID of HDC1000 device */

/* HDC1000 Register Map */
#define HDC1000_TEMPERATURE         0x00
#define HDC1000_HUMIDITY            0x01
#define HDC1000_CONFIGURATION       0x02
#define HDC1000_MANUFACTURER_ID_REG 0xFE
#define HDC1000_DEVICE_ID_REG       0xFF

/* HDC1000 configuration register bitmap */
#define HDC1000_RST_SOFT            0x8000
#define HDC1000_HEAT                (1 << 13)
#define HDC1000_SEQ_MODE            (1 << 12)
#define HDC1000_BTST_LOW            (1 << 11)
#define HDC1000_TRES_14             (0)
#define HDC1000_TRES_11             (1 << 10)
#define HDC1000_HRES_14             (0)
#define HDC1000_HRES_11             (1 << 8)
#define HDC1000_HRES_8              (1 << 9)

#define SLEEP_SEC                   (1000*1000)

namespace upm {

class HDC1000 {
    public:
        HDC1000 (int bus, int devAddr=HDC1000_i2C_ADDRESS);

        int checkID(void);

        void resetSensor(void);

        void sampleData(void);

        float getHumidity(int bSampleData = false);

        float getTemperature(int bSampleData = false);

    private:

        std::string m_name;

        int m_controlAddr;
        int m_bus;
        mraa::I2c m_i2ControlCtx;

        int32_t m_temperature;
        int32_t m_humidity;
};

}