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INA219
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/home/alex/github/ESP-Nodes/ESP-IDF_Robot/main
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/home/alex/github/ESP-Nodes/ESP-IDF_Robot/managed_components/espressif__led_strip
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/*
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* Copyright (c) 2019 Ruslan V. Uss <unclerus@gmail.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holder nor the names of itscontributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* @file ina219.h
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* @defgroup ina219 ina219
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* @{
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*
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* ESP-IDF driver for INA219/INA220 Zerø-Drift, Bidirectional
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* Current/Power Monitor
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*
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* Copyright (c) 2019 Ruslan V. Uss <unclerus@gmail.com>
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*
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* BSD Licensed as described in the file LICENSE
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*/
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#ifndef __INA219_H__
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#define __INA219_H__
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#include <i2cdev.h>
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#include <esp_err.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define INA219_ADDR_GND_GND 0x40 //!< I2C address, A1 pin - GND, A0 pin - GND
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#define INA219_ADDR_GND_VS 0x41 //!< I2C address, A1 pin - GND, A0 pin - VS+
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#define INA219_ADDR_GND_SDA 0x42 //!< I2C address, A1 pin - GND, A0 pin - SDA
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#define INA219_ADDR_GND_SCL 0x43 //!< I2C address, A1 pin - GND, A0 pin - SCL
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#define INA219_ADDR_VS_GND 0x44 //!< I2C address, A1 pin - VS+, A0 pin - GND
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#define INA219_ADDR_VS_VS 0x45 //!< I2C address, A1 pin - VS+, A0 pin - VS+
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#define INA219_ADDR_VS_SDA 0x46 //!< I2C address, A1 pin - VS+, A0 pin - SDA
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#define INA219_ADDR_VS_SCL 0x47 //!< I2C address, A1 pin - VS+, A0 pin - SCL
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#define INA219_ADDR_SDA_GND 0x48 //!< I2C address, A1 pin - SDA, A0 pin - GND
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#define INA219_ADDR_SDA_VS 0x49 //!< I2C address, A1 pin - SDA, A0 pin - VS+
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#define INA219_ADDR_SDA_SDA 0x4a //!< I2C address, A1 pin - SDA, A0 pin - SDA
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#define INA219_ADDR_SDA_SCL 0x4b //!< I2C address, A1 pin - SDA, A0 pin - SCL
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#define INA219_ADDR_SCL_GND 0x4c //!< I2C address, A1 pin - SCL, A0 pin - GND
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#define INA219_ADDR_SCL_VS 0x4d //!< I2C address, A1 pin - SCL, A0 pin - VS+
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#define INA219_ADDR_SCL_SDA 0x4e //!< I2C address, A1 pin - SCL, A0 pin - SDA
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#define INA219_ADDR_SCL_SCL 0x4f //!< I2C address, A1 pin - SCL, A0 pin - SCL
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/**
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* Bus voltage range
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*/
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typedef enum {
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INA219_BUS_RANGE_16V = 0, //!< 16V FSR
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INA219_BUS_RANGE_32V //!< 32V FSR (default)
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} ina219_bus_voltage_range_t;
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/**
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* PGA gain for shunt voltage
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*/
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typedef enum {
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INA219_GAIN_1 = 0, //!< Gain: 1, Range: +-40 mV
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INA219_GAIN_0_5, //!< Gain: 1/2, Range: +-80 mV
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INA219_GAIN_0_25, //!< Gain: 1/4, Range: +-160 mV
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INA219_GAIN_0_125 //!< Gain: 1/8, Range: +-320 mV (default)
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} ina219_gain_t;
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/**
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* ADC resolution/averaging
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*/
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typedef enum {
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INA219_RES_9BIT_1S = 0, //!< 9 bit, 1 sample, conversion time 84 us
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INA219_RES_10BIT_1S = 1, //!< 10 bit, 1 sample, conversion time 148 us
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INA219_RES_11BIT_1S = 2, //!< 11 bit, 1 sample, conversion time 276 us
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INA219_RES_12BIT_1S = 3, //!< 12 bit, 1 sample, conversion time 532 us (default)
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INA219_RES_12BIT_2S = 9, //!< 12 bit, 2 samples, conversion time 1.06 ms
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INA219_RES_12BIT_4S = 10, //!< 12 bit, 4 samples, conversion time 2.13 ms
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INA219_RES_12BIT_8S = 11, //!< 12 bit, 8 samples, conversion time 4.26 ms
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INA219_RES_12BIT_16S = 12, //!< 12 bit, 16 samples, conversion time 8.51 ms
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INA219_RES_12BIT_32S = 13, //!< 12 bit, 32 samples, conversion time 17.02 ms
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INA219_RES_12BIT_64S = 14, //!< 12 bit, 64 samples, conversion time 34.05 ms
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INA219_RES_12BIT_128S = 15, //!< 12 bit, 128 samples, conversion time 68.1 ms
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} ina219_resolution_t;
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/**
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* Operating mode
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*/
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typedef enum {
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INA219_MODE_POWER_DOWN = 0, //!< Power-done
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INA219_MODE_TRIG_SHUNT, //!< Shunt voltage, triggered
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INA219_MODE_TRIG_BUS, //!< Bus voltage, triggered
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INA219_MODE_TRIG_SHUNT_BUS, //!< Shunt and bus, triggered
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INA219_MODE_DISABLED, //!< ADC off (disabled)
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INA219_MODE_CONT_SHUNT, //!< Shunt voltage, continuous
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INA219_MODE_CONT_BUS, //!< Bus voltage, continuous
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INA219_MODE_CONT_SHUNT_BUS //!< Shunt and bus, continuous (default)
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} ina219_mode_t;
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/**
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* Device descriptor
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*/
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typedef struct
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{
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i2c_dev_t i2c_dev;
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uint16_t config;
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float i_lsb, p_lsb;
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} ina219_t;
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/**
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* @brief Initialize device descriptor
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*
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* @param dev Device descriptor
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* @param addr Device I2C address
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* @param port I2C port
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* @param sda_gpio SDA GPIO
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* @param scl_gpio SCL GPIO
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* @return `ESP_OK` on success
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*/
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esp_err_t ina219_init_desc(ina219_t *dev, uint8_t addr, i2c_port_t port, gpio_num_t sda_gpio, gpio_num_t scl_gpio);
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/**
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* @brief Free device descriptor
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*
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* @param dev Device descriptor
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* @return `ESP_OK` on success
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*/
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esp_err_t ina219_free_desc(ina219_t *dev);
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/**
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* @brief Init device
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*
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* Read current device configuration into `dev->config`
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*
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* @param dev Device descriptor
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* @return `ESP_OK` on success
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*/
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esp_err_t ina219_init(ina219_t *dev);
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/**
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* @brief Reset device
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*
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* Same as power-on reset. Resets all registers to default values.
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* You still need to calibrate device to read current, otherwise
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* only shunt voltage readings will be valid.
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*
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* @param dev Device descriptor
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* @return `ESP_OK` on success
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*/
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esp_err_t ina219_reset(ina219_t *dev);
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/**
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* @brief Set device configuration
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*
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* @param dev Device descriptor
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* @param u_range Bus voltage range
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* @param gain Shunt voltage gain
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* @param u_res Bus voltage resolution and averaging
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* @param i_res Shunt voltage resolution and averaging
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* @param mode Device operational mode
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* @return `ESP_OK` on success
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*/
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esp_err_t ina219_configure(ina219_t *dev, ina219_bus_voltage_range_t u_range,
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ina219_gain_t gain, ina219_resolution_t u_res,
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ina219_resolution_t i_res, ina219_mode_t mode);
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/**
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* @brief Get bus voltage range
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*
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* @param dev Device descriptor
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* @param[out] range Bus voltage range
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* @return `ESP_OK` on success
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*/
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esp_err_t ina219_get_bus_voltage_range(ina219_t *dev, ina219_bus_voltage_range_t *range);
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/**
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* @brief Get shunt voltage gain
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*
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* @param dev Device descriptor
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* @param[out] gain Shunt voltage gain
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* @return `ESP_OK` on success
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*/
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esp_err_t ina219_get_gain(ina219_t *dev, ina219_gain_t *gain);
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/**
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* @brief Get bus voltage resolution and averaging
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*
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* @param dev Device descriptor
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* @param[out] res Bus voltage resolution and averaging
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* @return `ESP_OK` on success
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*/
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esp_err_t ina219_get_bus_voltage_resolution(ina219_t *dev, ina219_resolution_t *res);
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/**
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* @brief Get shunt voltage resolution and averaging
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*
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* @param dev Device descriptor
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* @param[out] res Shunt voltage resolution and averaging
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* @return `ESP_OK` on success
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*/
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esp_err_t ina219_get_shunt_voltage_resolution(ina219_t *dev, ina219_resolution_t *res);
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/**
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* @brief Get operating mode
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*
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* @param dev Device descriptor
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* @param[out] mode Operating mode
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* @return `ESP_OK` on success
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*/
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esp_err_t ina219_get_mode(ina219_t *dev, ina219_mode_t *mode);
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/**
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* @brief Perform calibration
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*
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* Current readings will be valid only after calibration
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*
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* @param dev Device descriptor
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* @param r_shunt Shunt resistance, Ohm
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* @return `ESP_OK` on success
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*/
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esp_err_t ina219_calibrate(ina219_t *dev, float r_shunt);
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/**
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* @brief Trigger single conversion
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*
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* Function will return an error if current operating
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* mode is not `INA219_MODE_TRIG_SHUNT`/`INA219_MODE_TRIG_BUS`/`INA219_MODE_TRIG_SHUNT_BUS`
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*
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* @param dev Device descriptor
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* @return `ESP_OK` on success
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*/
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esp_err_t ina219_trigger(ina219_t *dev);
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/**
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* @brief Read bus voltage
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*
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* @param dev Device descriptor
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* @param[out] voltage Bus voltage, V
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* @return `ESP_OK` on success
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*/
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esp_err_t ina219_get_bus_voltage(ina219_t *dev, float *voltage);
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/**
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* @brief Read shunt voltage
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*
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* @param dev Device descriptor
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* @param[out] voltage Shunt voltage, V
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* @return `ESP_OK` on success
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*/
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esp_err_t ina219_get_shunt_voltage(ina219_t *dev, float *voltage);
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/**
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* @brief Read current
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*
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* This function works properly only after calibration.
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*
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* @param dev Device descriptor
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* @param[out] current Current, A
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* @return `ESP_OK` on success
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*/
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esp_err_t ina219_get_current(ina219_t *dev, float *current);
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/**
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* @brief Read power
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*
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* This function works properly only after calibration.
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*
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* @param dev Device descriptor
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* @param[out] power Power, W
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* @return `ESP_OK` on success
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*/
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esp_err_t ina219_get_power(ina219_t *dev, float *power);
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#ifdef __cplusplus
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}
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#endif
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/**@}*/
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#endif /* __INA219_H__ */
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