Adafruit_LPS2X.h

Go to the documentation of this file.

#ifndef _ADAFRUIT_LPS2X_H
#define _ADAFRUIT_LPS2X_H

#include "Arduino.h"
#include <Adafruit_BusIO_Register.h>
#include <Adafruit_I2CDevice.h>
#include <Adafruit_Sensor.h>
#include <Wire.h>

#define LPS2X_I2CADDR_DEFAULT 0x5D 
#define LPS2X_WHOAMI 0x0F          

#define LPS22HB_CHIP_ID 0xB1   
#define LPS22_THS_P_L_REG 0x0C 
#define LPS22_CTRL_REG1 0x10   
#define LPS22_CTRL_REG2 0x11   
#define LPS22_CTRL_REG3                                                        \
  0x12 

#define LPS25HB_CHIP_ID 0xBD 
#define LPS25_CTRL_REG1 0x20 
#define LPS25_CTRL_REG2 0x21 
#define LPS25_CTRL_REG3                                                        \
  0x22 
#define LPS25_CTRL_REG4                                                        \
  0x23 
#define LPS25_INTERRUPT_CFG 0x24 
#define LPS25_THS_P_L_REG 0xB0   

#define LPS2X_PRESS_OUT_XL                                                     \
  (0x28 | 0x80) 
#define LPS2X_TEMP_OUT_L (0x2B | 0x80) 


typedef enum {
  LPS25_RATE_ONE_SHOT,
  LPS25_RATE_1_HZ,
  LPS25_RATE_7_HZ,
  LPS25_RATE_12_5_HZ,
  LPS25_RATE_25_HZ,
} lps25_rate_t;

typedef enum {
  LPS22_RATE_ONE_SHOT,
  LPS22_RATE_1_HZ,
  LPS22_RATE_10_HZ,
  LPS22_RATE_25_HZ,
  LPS22_RATE_50_HZ,
  LPS22_RATE_75_HZ,
} lps22_rate_t;

class Adafruit_LPS2X;

class Adafruit_LPS2X_Temp : public Adafruit_Sensor {
public:
  Adafruit_LPS2X_Temp(Adafruit_LPS2X *parent) { _theLPS2X = parent; }
  bool getEvent(sensors_event_t *);
  void getSensor(sensor_t *);

private:
  int _sensorID = 0x25;
  Adafruit_LPS2X *_theLPS2X = NULL;
};

class Adafruit_LPS2X_Pressure : public Adafruit_Sensor {
public:
  Adafruit_LPS2X_Pressure(Adafruit_LPS2X *parent) { _theLPS2X = parent; }
  bool getEvent(sensors_event_t *);
  void getSensor(sensor_t *);

private:
  int _sensorID = 0x26;
  Adafruit_LPS2X *_theLPS2X = NULL;
};

class Adafruit_LPS2X {
public:
  Adafruit_LPS2X();
  virtual ~Adafruit_LPS2X(){};

  bool begin_I2C(uint8_t i2c_addr = LPS2X_I2CADDR_DEFAULT,
                 TwoWire *wire = &Wire, int32_t sensor_id = 0);

  bool begin_SPI(uint8_t cs_pin, SPIClass *theSPI = &SPI,
                 int32_t sensor_id = 0);
  bool begin_SPI(int8_t cs_pin, int8_t sck_pin, int8_t miso_pin,
                 int8_t mosi_pin, int32_t sensor_id = 0);

  void setPresThreshold(uint16_t hPa_delta);
  bool getEvent(sensors_event_t *pressure, sensors_event_t *temp);
  void reset(void);

  Adafruit_Sensor *getTemperatureSensor(void);
  Adafruit_Sensor *getPressureSensor(void);

protected:
  virtual bool _init(int32_t sensor_id) = 0;

  void _read(void);

  float _temp,   
      _pressure; 

  uint16_t _sensorid_pressure, 
      _sensorid_temp;          
  float temp_scaling = 1;      
  float temp_offset = 1;       
  uint8_t inc_spi_flag =
      0; 
  bool isOneShot = false; 

  Adafruit_I2CDevice *i2c_dev = NULL; 
  Adafruit_SPIDevice *spi_dev = NULL; 

  Adafruit_LPS2X_Temp *temp_sensor = NULL; 
  Adafruit_LPS2X_Pressure *pressure_sensor =
      NULL; 

  Adafruit_BusIO_Register *ctrl1_reg = NULL;   
  Adafruit_BusIO_Register *ctrl2_reg = NULL;   
  Adafruit_BusIO_Register *ctrl3_reg = NULL;   
  Adafruit_BusIO_Register *threshp_reg = NULL; 

private:
  friend class Adafruit_LPS2X_Temp;     
  friend class Adafruit_LPS2X_Pressure; 

  void fillPressureEvent(sensors_event_t *pressure, uint32_t timestamp);
  void fillTempEvent(sensors_event_t *temp, uint32_t timestamp);
};

class Adafruit_LPS25 : public Adafruit_LPS2X {
public:
  ~Adafruit_LPS25();
  lps25_rate_t getDataRate(void);
  void setDataRate(lps25_rate_t data_rate);
  void powerDown(bool power_down);
  void configureInterrupt(bool activelow, bool opendrain,
                          bool pres_high = false, bool pres_low = false);

protected:
  bool _init(int32_t sensor_id);
};

class Adafruit_LPS22 : public Adafruit_LPS2X {
public:
  ~Adafruit_LPS22();
  lps22_rate_t getDataRate(void);
  void setDataRate(lps22_rate_t data_rate);
  void configureInterrupt(bool activelow, bool opendrain, bool data_ready,
                          bool pres_high = false, bool pres_low = false,
                          bool fifo_full = false, bool fifo_watermark = false,
                          bool fifo_overflow = false);

protected:
  bool _init(int32_t sensor_id);
};

#endif