#pragma once
//
//    FILE: mcp9808.h
//  AUTHOR: Rob Tillaart
// VERSION: 0.2.1
// PURPOSE: Arduino Library for I2C mcp9808 temperature sensor
//    DATE: 2020-05-03
//     URL: https://github.com/RobTillaart/MCP9808_RT
//


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

// VALID ADDRESSES,
// max 8 sensors on one bus
// 24..31 == 0x18..0x1F


#define MCP9808_LIB_VERSION               (F("0.2.1"))


// CONFIGURATION REGISTER MASKS
// check the datasheet for exact usage
#define MCP9808_THYSTERESIS               0x0600
#define MCP9808_SHUTDOWN                  0x0100
#define MCP9808_CRIT_LOCK                 0x0080
#define MCP9808_WIN_LOCK                  0x0040
#define MCP9808_INT_CLEAR                 0x0020
#define MCP9808_ALERT_STATUS              0x0010
#define MCP9808_ALERT_CTRL                0x0008
#define MCP9808_ALERT_SELECT              0x0004
#define MCP9808_ALERT_POLAR               0x0002
#define MCP9808_ALERT_MODE                0x0001


class MCP9808
{
public:
#if defined(ESP8266) || defined(ESP32)
  // dataPin and clockPin can be used for ESP8266
  MCP9808(const uint8_t address, const uint8_t dataPin = 255, const uint8_t clockPin = 255);
#else
  MCP9808(const uint8_t address);
#endif

  bool      setAddress(const uint8_t address, TwoWire *wire = &Wire);
  bool      isConnected();

  void      setConfigRegister(uint16_t configuration);
  uint16_t  getConfigRegister();

  void      setTupper(float temperature);
  float     getTupper();
  void      setTlower(float temperature);
  float     getTlower();
  void      setTcritical(float temperature);
  float     getTcritical();

  void      setOffset(float offset = 0.0);
  float     getOffset();
  float     getTemperature();

  // getStatus() returns 0..7
  // to get latest status, getTemperature() must be called first 
  uint8_t   getStatus();

  void      setResolution(uint8_t resolution = 3);
  uint8_t   getResolution();

  uint16_t  getManufacturerID();
  uint8_t   getDeviceID();
  uint8_t   getRevision();

  // Reserved Register, not used
  uint16_t  getRFU();


private:
  float     _offset = 0;
  uint8_t   _status = 0;     // 0..7
  uint8_t   _address;
  TwoWire*  _wire;

  void      writeFloat(uint8_t reg, float f);
  float     readFloat(uint8_t reg);

  void      writeReg8(uint8_t reg, uint8_t value);
  uint8_t   readReg8(uint8_t reg);
  void      writeReg16(uint8_t reg, uint16_t value);
  uint16_t  readReg16(uint8_t reg);
};


// -- END OF FILE --