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/**************************************************************************/
/*!
@file Adafruit_INA219.h
@author K. Townsend (Adafruit Industries)
@license BSD (see license.txt)
This is a library for the Adafruit INA219 breakout board
----> https://www.adafruit.com/products/???
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
@section HISTORY
v1.0 - First release
*/
/**************************************************************************/
#if ARDUINO >= 100
#include "Arduino.h"
#else
#include "WProgram.h"
#endif
#include <Wire.h>
/*=========================================================================
I2C ADDRESS/BITS
-----------------------------------------------------------------------*/
#define INA219_ADDRESS (0x40) // 1000000 (A0+A1=GND)
#define INA219_READ (0x01)
/*=========================================================================*/
/*=========================================================================
CONFIG REGISTER (R/W)
-----------------------------------------------------------------------*/
#define INA219_REG_CONFIG (0x00)
/*---------------------------------------------------------------------*/
#define INA219_CONFIG_RESET (0x8000) // Reset Bit
#define INA219_CONFIG_BVOLTAGERANGE_MASK (0x4000) // Bus Voltage Range Mask
#define INA219_CONFIG_BVOLTAGERANGE_16V (0x0000) // 0-16V Range
#define INA219_CONFIG_BVOLTAGERANGE_32V (0x4000) // 0-32V Range
#define INA219_CONFIG_GAIN_MASK (0x1800) // Gain Mask
#define INA219_CONFIG_GAIN_1_40MV (0x0000) // Gain 1, 40mV Range
#define INA219_CONFIG_GAIN_2_80MV (0x0800) // Gain 2, 80mV Range
#define INA219_CONFIG_GAIN_4_160MV (0x1000) // Gain 4, 160mV Range
#define INA219_CONFIG_GAIN_8_320MV (0x1800) // Gain 8, 320mV Range
#define INA219_CONFIG_BADCRES_MASK (0x0780) // Bus ADC Resolution Mask
#define INA219_CONFIG_BADCRES_9BIT (0x0080) // 9-bit bus res = 0..511
#define INA219_CONFIG_BADCRES_10BIT (0x0100) // 10-bit bus res = 0..1023
#define INA219_CONFIG_BADCRES_11BIT (0x0200) // 11-bit bus res = 0..2047
#define INA219_CONFIG_BADCRES_12BIT (0x0400) // 12-bit bus res = 0..4097
#define INA219_CONFIG_SADCRES_MASK (0x0078) // Shunt ADC Resolution and Averaging Mask
#define INA219_CONFIG_SADCRES_9BIT_1S_84US (0x0000) // 1 x 9-bit shunt sample
#define INA219_CONFIG_SADCRES_10BIT_1S_148US (0x0008) // 1 x 10-bit shunt sample
#define INA219_CONFIG_SADCRES_11BIT_1S_276US (0x0010) // 1 x 11-bit shunt sample
#define INA219_CONFIG_SADCRES_12BIT_1S_532US (0x0018) // 1 x 12-bit shunt sample
#define INA219_CONFIG_SADCRES_12BIT_2S_1060US (0x0048) // 2 x 12-bit shunt samples averaged together
#define INA219_CONFIG_SADCRES_12BIT_4S_2130US (0x0050) // 4 x 12-bit shunt samples averaged together
#define INA219_CONFIG_SADCRES_12BIT_8S_4260US (0x0058) // 8 x 12-bit shunt samples averaged together
#define INA219_CONFIG_SADCRES_12BIT_16S_8510US (0x0060) // 16 x 12-bit shunt samples averaged together
#define INA219_CONFIG_SADCRES_12BIT_32S_17MS (0x0068) // 32 x 12-bit shunt samples averaged together
#define INA219_CONFIG_SADCRES_12BIT_64S_34MS (0x0070) // 64 x 12-bit shunt samples averaged together
#define INA219_CONFIG_SADCRES_12BIT_128S_69MS (0x0078) // 128 x 12-bit shunt samples averaged together
#define INA219_CONFIG_MODE_MASK (0x0007) // Operating Mode Mask
#define INA219_CONFIG_MODE_POWERDOWN (0x0000)
#define INA219_CONFIG_MODE_SVOLT_TRIGGERED (0x0001)
#define INA219_CONFIG_MODE_BVOLT_TRIGGERED (0x0002)
#define INA219_CONFIG_MODE_SANDBVOLT_TRIGGERED (0x0003)
#define INA219_CONFIG_MODE_ADCOFF (0x0004)
#define INA219_CONFIG_MODE_SVOLT_CONTINUOUS (0x0005)
#define INA219_CONFIG_MODE_BVOLT_CONTINUOUS (0x0006)
#define INA219_CONFIG_MODE_SANDBVOLT_CONTINUOUS (0x0007)
/*=========================================================================*/
/*=========================================================================
SHUNT VOLTAGE REGISTER (R)
-----------------------------------------------------------------------*/
#define INA219_REG_SHUNTVOLTAGE (0x01)
/*=========================================================================*/
/*=========================================================================
BUS VOLTAGE REGISTER (R)
-----------------------------------------------------------------------*/
#define INA219_REG_BUSVOLTAGE (0x02)
/*=========================================================================*/
/*=========================================================================
POWER REGISTER (R)
-----------------------------------------------------------------------*/
#define INA219_REG_POWER (0x03)
/*=========================================================================*/
/*=========================================================================
CURRENT REGISTER (R)
-----------------------------------------------------------------------*/
#define INA219_REG_CURRENT (0x04)
/*=========================================================================*/
/*=========================================================================
CALIBRATION REGISTER (R/W)
-----------------------------------------------------------------------*/
#define INA219_REG_CALIBRATION (0x05)
/*=========================================================================*/
class Adafruit_INA219{
public:
Adafruit_INA219();
void begin(void);
int16_t getShuntVoltage(void);
int16_t getBusVoltage(void);
int16_t getCurrent(void);
int16_t getCurrent_mA(void);
private:
// The following multipliers are used to convert raw current and power
// values to mA and mW, taking into account the current config settings
uint32_t ina219_currentDivider_mA;
uint32_t ina219_powerDivider_mW;
void wireWriteRegister(uint8_t reg, uint16_t value);
void wireReadRegister(uint8_t reg, uint16_t *value);
void ina219SetCalibration_32V_2A(void);
void ina219SetCalibration_32V_1A(void);
};
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