/* 09/23/2017 Copyright Tlera Corporation

    Created by Kris Winer

  This sketch uses SDA/SCL on pins 21/20 (Butterfly default), respectively, and it uses the Butterfly STM32L433CU Breakout Board.
  The LPS22HB is a low power barometerr.

  Library may be used freely and without limit with attribution.

*/

#ifndef LPS22HB_h
#define LPS22HB_h

#include "Arduino.h"
#include "Wire.h"
#include "I2Cdev.h"

// See LPS22H "MEMS pressure sensor: 260-1260 hPa absolute digital output barometer" Data Sheet
// http://www.st.com/content/ccc/resource/technical/document/datasheet/bf/c1/4f/23/61/17/44/8a/DM00140895.pdf/files/DM00140895.pdf/jcr:content/translations/en.DM00140895.pdf
#define LPS22H_INTERRUPT_CFG 0x0B
#define LPS22H_THS_P_L       0x0C
#define LPS22H_THS_P_H       0x0D
#define LPS22H_WHOAMI        0x0F // should return 0xB1
#define LPS22H_CTRL_REG1     0x10
#define LPS22H_CTRL_REG2     0x11
#define LPS22H_CTRL_REG3     0x12
#define LPS22H_FIFO_CTRL     0x14
#define LPS22H_REF_P_XL      0x15
#define LPS22H_REF_P_L       0x16
#define LPS22H_REF_P_H       0x17
#define LPS22H_RPDS_L        0x18
#define LPS22H_RPDS_H        0x19
#define LPS22H_RES_CONF      0x1A
#define LPS22H_INT_SOURCE    0x25
#define LPS22H_FIFO_STATUS   0x26
#define LPS22H_STATUS        0x27
#define LPS22H_PRESS_OUT_XL  0x28
#define LPS22H_PRESS_OUT_L   0x29
#define LPS22H_PRESS_OUT_H   0x2A
#define LPS22H_TEMP_OUT_L    0x2B
#define LPS22H_TEMP_OUT_H    0x2C
#define LPS22H_LPFP_RES      0x33

#define LPS22H_ADDRESS 0x5C   // Address of altimeter

// Altimeter output data rate
#define    P_1shot  0x00;
#define    P_1Hz    0x01;
#define    P_10Hz   0x02;
#define    P_25Hz   0x03;  // 25 Hz output data rate
#define    P_50Hz   0x04;
#define    P_75Hz   0x05;

class LPS22H
{
  public: 
  LPS22H(uint8_t intPin, I2Cdev* i2c_bus);
  void Init(uint8_t PODR);
  uint8_t getChipID();
  uint8_t status();
  int32_t readAltimeterPressure();
  int16_t readAltimeterTemperature();
  void I2Cscan();
  void writeByte(uint8_t address, uint8_t subAddress, uint8_t data);
  uint8_t readByte(uint8_t address, uint8_t subAddress);
  void readBytes(uint8_t address, uint8_t subAddress, uint8_t count, uint8_t * dest);
  private:
  uint8_t   _intPin;
  I2Cdev* _i2c_bus;
};

#endif