File content as of revision 1:4c6b41f1203d:

#ifndef BMP180_H
#define BMP180_H

/* BMP180 Digital Pressure Sensor Class for use with Mbed LPC1768 and other platforms
*  BMP180 from Bosch Sensortec
*  Copyright (c) 2013 Philip King Smith
*
* 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.
*/

/** BMP180 Digital Pressure Sensor class using mbed's i2c class
 *
 * Example:
 * @code
 * // show how the BMP180 class works
 * #include "BMP180.h"
 * #include "mbed.h"
 *
 * Serial pc(USBTX, USBRX); // tx, rx  for debug and usb pc comunications
 *
 *
 * @endcode
 */

#include "mbed.h"

#define EEprom 22            // The EEPROM has 176bits of calibration data (176/8 = 22 Bytes)
#define BMP180ADDR 0xEF      // I2C address of BMP180 device
#define BMP180FREQ 1000000   // Data sheet says 3.4 MHz is max but not sure what mbed can do here!
#define CMD_READ_VALUE 0xF6
#define CMD_READ_CALIBRATION 0xAA
#define OVERSAMPLING_ULTRA_LOW_POWER 0
#define OVERSAMPLING_STANDARD 1
#define OVERSAMPLING_HIGH_RESOLUTION 2
#define OVERSAMPLING_ULTRA_HIGH_RESOLUTION 3

class BMP180
{
public:
    /** Create object connected to BMP180 pins ( remember both pins need pull up resisters)
        *
        * Ensure the pull up resistors are used on these pins.  Also note there is no checking on
        *  if you use thes pins p9, p10, p27, p28 so ensure you only use these ones on the LPC1768 device
        *
        * @param sda pin that DS1307 connected to (p9 or p28 as defined on LPC1768)
        * @param slc pin that DS1307 connected to (p10 or p27 ad defined on LPC1768)
        */
    BMP180(PinName sda, PinName slc);  // Constructor

    ~BMP180();          // Destructor

    int readTP(long *t, long *p, int oversample);    // get both temperature and pressure fully compensated values! Note this only returns when measurements are complete

    int startTemperature();             // Start temperature measurement
    int readTemperature(long *t);       // Get the temperature reading that was taken in startTemperature() but ensure 4.5 ms time has elapsed
    int startPressure(int oversample);  // Start pressure measurement!  Note oversample will vary the time to complete this measurement. See defines above for oversampling constants to use!
    int readPressure(long *p);          // Get the pressure reading that was taken in startPressure() but ensure time for the measurement to complete

protected:
    long x1;
    long x2;
    long x3;
    short ac1;
    short ac2;
    short ac3;
    unsigned short ac4;
    unsigned short ac5;
    unsigned short ac6;
    short b1;
    short b2;
    long b3;
    unsigned long b4;
    long b5;
    long b6;
    unsigned long b7;
    short mb;
    short mc;
    short md;
    int oversampling_setting;
    char rReg[3];
    char wReg[2];
    char cmd;
    char data[EEprom];
    char w[2];

    I2C bmp180i2c;              // the I2C class for this bmp180 communication.
    int oversampleCheck(int oversample);
};

#endif