Adafruit_DS1841.h

/*!
 *  @file Adafruit_DS1841.h
 *
 * 	I2C Driver for the Adafruit DS1841 I2C Logorithmic Resistor
 *
 * 	This is a library for the Adafruit DS1841 breakout:
 * 	https://www.adafruit.com/products/4570
 *
 * 	Adafruit invests time and resources providing this open source code,
 *  please support Adafruit and open-source hardware by purchasing products from
 * 	Adafruit!
 *
 *
 *	BSD license (see license.txt)
 */

#ifndef _ADAFRUIT_DS1841_H
#define _ADAFRUIT_DS1841_H

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

#define DS1841_IVR 0x00     ///< Initial Value register
#define DS1841_CR0 0x02     ///< controls SEE/EEprom shadowng
#define DS1841_CR1 0x03     ///< Set Adder Mode and Update Mode
#define DS1841_LUTAR 0x08   ///< Address into LUT to use for WR
#define DS1841_WR 0x09      ///< Wiper Resgister for manually setting wiper
#define DS1841_CR2 0x0A     ///< Sets Wiper access and LUTAR mode
#define DS1841_TEMP 0x0C    ///< Temperature; Requires Update Mode = True
#define DS1841_VOLTAGE 0x0E ///< VCC voltage; requires Update Mode=True
#define DS1841_LUT 0x80     ///< LUT offset, up to 0xC7

#define DS1841_VCC_LSB_TO_MA 25.6   ///< LSB Value for Voltage in mA
#define DS1841_I2CADDR_DEFAULT 0x28 ///< LUT Address offset, up to 0x2B

/*!
 *    @brief  Class that stores state and functions for interacting with
 *            the DS1841 I2C Logorithmic Resistor
 */
class Adafruit_DS1841 {
public:
  bool begin(uint8_t i2c_addr = DS1841_I2CADDR_DEFAULT, TwoWire *wire = &Wire);

  int8_t getTemperature(void);
  float getVoltage(void);
  uint8_t getWiper(void);
  bool setWiper(uint8_t new_wiper_value);
  bool setWiperDefault(uint8_t new_wiper_default);
  uint8_t getLUT(uint8_t index);
  bool setLUT(uint8_t index, uint8_t value);
  uint8_t getLUTSelection(void);
  bool setLUTSelection(uint8_t lut_index);

  void enableSaveToEEPROM(bool enable_eeprom);
  void enableUpdateMode(bool enable_update);
  void enableAdderMode(bool enable_adder_mode);
  void enableManualWiper(bool manual_wiper);
  void enableManualLUTAddr(bool manual_lut_addr);
  void enableLUTMode(bool enable_lut_mode);

private:
  bool _init(void);
  Adafruit_I2CDevice *i2c_dev = NULL; ///< Pointer to I2C bus interface
};

#endif