123 lines
4.7 KiB
C++
123 lines
4.7 KiB
C++
/***************************************************************************
|
|
This is a library for the BMP085 pressure sensor
|
|
|
|
Designed specifically to work with the Adafruit BMP085 or BMP180 Breakout
|
|
----> http://www.adafruit.com/products/391
|
|
----> http://www.adafruit.com/products/1603
|
|
|
|
These displays use I2C to communicate, 2 pins are required to interface.
|
|
|
|
Adafruit invests time and resources providing this open source code,
|
|
please support Adafruit andopen-source hardware by purchasing products
|
|
from Adafruit!
|
|
|
|
Written by Kevin Townsend for Adafruit Industries.
|
|
BSD license, all text above must be included in any redistribution
|
|
***************************************************************************/
|
|
#ifndef __BMP085_H__
|
|
#define __BMP085_H__
|
|
|
|
#if (ARDUINO >= 100)
|
|
#include "Arduino.h"
|
|
#else
|
|
#include "WProgram.h"
|
|
#endif
|
|
|
|
#include <Adafruit_Sensor.h>
|
|
|
|
#ifdef __AVR_ATtiny85__
|
|
#include "TinyWireM.h"
|
|
#define Wire TinyWireM
|
|
#else
|
|
#include <Wire.h>
|
|
#endif
|
|
|
|
/*=========================================================================
|
|
I2C ADDRESS/BITS
|
|
-----------------------------------------------------------------------*/
|
|
#define BMP085_ADDRESS (0x77)
|
|
/*=========================================================================*/
|
|
|
|
/*=========================================================================
|
|
REGISTERS
|
|
-----------------------------------------------------------------------*/
|
|
enum
|
|
{
|
|
BMP085_REGISTER_CAL_AC1 = 0xAA, // R Calibration data (16 bits)
|
|
BMP085_REGISTER_CAL_AC2 = 0xAC, // R Calibration data (16 bits)
|
|
BMP085_REGISTER_CAL_AC3 = 0xAE, // R Calibration data (16 bits)
|
|
BMP085_REGISTER_CAL_AC4 = 0xB0, // R Calibration data (16 bits)
|
|
BMP085_REGISTER_CAL_AC5 = 0xB2, // R Calibration data (16 bits)
|
|
BMP085_REGISTER_CAL_AC6 = 0xB4, // R Calibration data (16 bits)
|
|
BMP085_REGISTER_CAL_B1 = 0xB6, // R Calibration data (16 bits)
|
|
BMP085_REGISTER_CAL_B2 = 0xB8, // R Calibration data (16 bits)
|
|
BMP085_REGISTER_CAL_MB = 0xBA, // R Calibration data (16 bits)
|
|
BMP085_REGISTER_CAL_MC = 0xBC, // R Calibration data (16 bits)
|
|
BMP085_REGISTER_CAL_MD = 0xBE, // R Calibration data (16 bits)
|
|
BMP085_REGISTER_CHIPID = 0xD0,
|
|
BMP085_REGISTER_VERSION = 0xD1,
|
|
BMP085_REGISTER_SOFTRESET = 0xE0,
|
|
BMP085_REGISTER_CONTROL = 0xF4,
|
|
BMP085_REGISTER_TEMPDATA = 0xF6,
|
|
BMP085_REGISTER_PRESSUREDATA = 0xF6,
|
|
BMP085_REGISTER_READTEMPCMD = 0x2E,
|
|
BMP085_REGISTER_READPRESSURECMD = 0x34
|
|
};
|
|
/*=========================================================================*/
|
|
|
|
/*=========================================================================
|
|
MODE SETTINGS
|
|
-----------------------------------------------------------------------*/
|
|
typedef enum
|
|
{
|
|
BMP085_MODE_ULTRALOWPOWER = 0,
|
|
BMP085_MODE_STANDARD = 1,
|
|
BMP085_MODE_HIGHRES = 2,
|
|
BMP085_MODE_ULTRAHIGHRES = 3
|
|
} bmp085_mode_t;
|
|
/*=========================================================================*/
|
|
|
|
/*=========================================================================
|
|
CALIBRATION DATA
|
|
-----------------------------------------------------------------------*/
|
|
typedef struct
|
|
{
|
|
int16_t ac1;
|
|
int16_t ac2;
|
|
int16_t ac3;
|
|
uint16_t ac4;
|
|
uint16_t ac5;
|
|
uint16_t ac6;
|
|
int16_t b1;
|
|
int16_t b2;
|
|
int16_t mb;
|
|
int16_t mc;
|
|
int16_t md;
|
|
} bmp085_calib_data;
|
|
/*=========================================================================*/
|
|
|
|
class Adafruit_BMP085_Unified : public Adafruit_Sensor
|
|
{
|
|
public:
|
|
Adafruit_BMP085_Unified(int32_t sensorID = -1);
|
|
|
|
bool begin(bmp085_mode_t mode = BMP085_MODE_ULTRAHIGHRES);
|
|
void getTemperature(float *temp);
|
|
void getPressure(float *pressure);
|
|
float pressureToAltitude(float seaLvel, float atmospheric);
|
|
float seaLevelForAltitude(float altitude, float atmospheric);
|
|
// Note that the next two functions are just for compatibility with old
|
|
// code that passed the temperature as a third parameter. A newer
|
|
// calculation is used which does not need temperature.
|
|
float pressureToAltitude(float seaLevel, float atmospheric, float temp);
|
|
float seaLevelForAltitude(float altitude, float atmospheric, float temp);
|
|
void getEvent(sensors_event_t*);
|
|
void getSensor(sensor_t*);
|
|
|
|
private:
|
|
int32_t computeB5(int32_t ut);
|
|
int32_t _sensorID;
|
|
};
|
|
|
|
#endif
|