I2C-INA219.h

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/*
 *  Copyright (C) 2023 Swansea University
 *
 *  This file is part of the SELKIELogger suite of tools.
 *
 *  SELKIELogger is free software: you can redistribute it and/or modify it
 *  under the terms of the GNU General Public License as published by the Free
 *  Software Foundation, either version 3 of the License, or (at your option)
 *  any later version.
 *
 *  SELKIELogger is distributed in the hope that it will be useful, but WITHOUT
 *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 *  more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this SELKIELogger product.
 *  If not, see <http://www.gnu.org/licenses/>.
*/
 
#ifndef SELKIELoggerI2C_INA219
#define SELKIELoggerI2C_INA219
 
#include <stdbool.h>
 
#define INA219_REG_CONFIG      0x00
 
#define INA219_REG_SHUNT       0x01
 
#define INA219_REG_BUS         0x02
 
#define INA219_REG_POWER       0x03
 
#define INA219_REG_CURRENT     0x04
 
#define INA219_REG_CALIBRATION 0x05
 
 
#define INA219_CONFIG_DEF      0x3DDF
 
#define INA219_CONFIG_RESET    0x8000
 
typedef struct {
    float scale;  
    float offset; 
    float min;    
    float max;    
} i2c_ina219_options;
 
#define I2C_INA219_DEFAULTS \
    { .scale = 1.0, .offset = 0.0, .min = -INFINITY, .max = INFINITY }
 
bool i2c_ina219_configure(const int busHandle, const int devAddr);
 
uint16_t i2c_ina219_read_configuration(const int busHandle, const int devAddr);
 
float i2c_ina219_read_shuntVoltage(const int busHandle, const int devAddr, const void *opts);
 
float i2c_ina219_read_busVoltage(const int busHandle, const int devAddr, const void *opts);
 
float i2c_ina219_read_power(const int busHandle, const int devAddr, const void *opts);
 
float i2c_ina219_read_current(const int busHandle, const int devAddr, const void *opts);
 
#endif