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//>>> The latest version of this code can be found at https://github.com/jcw/ !!

// Port library interface to BMP085 sensors connected via I2C

// 2009-02-17 <jcw@equi4.com> http://opensource.org/licenses/mit-license.php

// $Id$

class BMP085 : public DeviceI2C {

    int16_t ac1, ac2, ac3, b1, b2, mb, mc, md;

    uint16_t ac4, ac5, ac6;

    uint16_t readWord(uint8_t last) const

        { uint16_t v = read(0) << 8; return v | read(last); }

    void readFromReg(uint8_t reg) const

        { send(); write(reg); receive(); }

public:

    enum { TEMP, PRES };

    int32_t meas[2];

    uint8_t oss;

    BMP085 (const PortI2C& p, uint8_t osrs =0)

        : DeviceI2C (p, 0x77), oss (osrs) {}

    void setOverSampling(uint8_t osrs) { oss = osrs; }

    uint8_t startMeas(uint8_t type) const;

    int32_t getResult(uint8_t type);

    int32_t measure(uint8_t type)

        { delay(startMeas(type)); return getResult(type); }

    void getCalibData();

    void calculate(int16_t& tval, int32_t& pval) const;

};