si7005.hpp

/*
 * Author: Scott Ware <scott.r.ware@intel.com>
 * Copyright (c) 2014 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 <mraa/i2c.hpp>

#include "upm/iTemperatureSensor.hpp"
#include "upm/iHumiditySensor.hpp"

/* ADDRESS AND NOT_FOUND VALUE */
#define SI7005_ADDRESS                     ( 0x40 )
#define SI7005_NOT_FOUND                   ( 0x00 )


namespace upm {

class SI7005 : public ITemperatureSensor, public IHumiditySensor {
    public:
        SI7005 (int bus, int pin);

        ~SI7005 ();

        uint16_t getTemperatureRaw ();

        int getTemperatureCelsius ();

        uint16_t getHumidityRaw ();

        int getHumidityRelative ();

        const char* getModuleName() { return "si7005"; }

        bool isAvailable();

        void enableHeater();

        void disableHeater();

        void enableFastConversionMode();

        void disableFastConversionMode();

    private:
        int m_controlAddr;
        int m_bus;
        int m_pin;
        mraa::I2c* m_i2c;
        mraa::Result status;
        uint8_t config_reg;
        float last_temperature;

        uint16_t getMeasurement(uint8_t configValue);
};

}