Adafruit_MCP3421.h

#ifndef ADAFRUIT_MCP3421_H
#define ADAFRUIT_MCP3421_H

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

typedef enum {
  GAIN_1X = 0b00, 
  GAIN_2X = 0b01, 
  GAIN_4X = 0b10, 
  GAIN_8X = 0b11  
} mcp3421_gain;

typedef enum {
  RESOLUTION_12_BIT = 0b00, 
  RESOLUTION_14_BIT = 0b01, 
  RESOLUTION_16_BIT = 0b10, 
  RESOLUTION_18_BIT = 0b11  
} mcp3421_resolution;

typedef enum {
  MODE_CONTINUOUS = 0b1, 
  MODE_ONE_SHOT = 0b0    
} mcp3421_mode;

typedef struct {
  uint8_t gain : 2;       
  uint8_t resolution : 2; 
  uint8_t mode : 1;       
  uint8_t unused : 2;     
  uint8_t ready : 1;      
} mcp3421_config_t;

class Adafruit_MCP3421 {
public:
  Adafruit_MCP3421();
  boolean begin(uint8_t i2c_addr = 0x68, TwoWire *wire = &Wire);

  void setGain(mcp3421_gain gain);
  mcp3421_gain getGain();

  void setResolution(mcp3421_resolution res);
  mcp3421_resolution getResolution();

  void setMode(mcp3421_mode mode);
  mcp3421_mode getMode();

  bool isReady();
  bool startOneShotConversion();
  int32_t readADC();

private:
  Adafruit_I2CDevice *i2c_dev; 
  mcp3421_config_t config;     
  uint8_t adc_data[3];         
  bool readData(); 
};

#endif // ADAFRUIT_MCP3421_H