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INA219 full-featured driver library for general-purpose MCU and Linux.

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## LibDriver INA219

[![MISRA](https://img.shields.io/badge/misra-compliant-brightgreen.svg)](https://raw.githubusercontent.com/libdriver/ina219/main/misra/README.md) [![API](https://img.shields.io/badge/api-reference-blue.svg)](https://www.libdriver.com/docs/ina219/index.html) [![License](https://img.shields.io/badge/license-MIT-brightgreen.svg)](https://raw.githubusercontent.com/libdriver/ina219/main/LICENSE)

The INA219 is a current shunt and power monitor with an I2C- or SMBUS-compatible interface. The device monitors both shunt voltage drop and bus supply voltage, with programmable conversion times and filtering. A programmable calibration value, combined with an internal multiplier, enables direct readouts of current in amperes. An additional multiplying register calculates power in watts. The I2C- or SMBUS-compatible interface features 16 programmable addresses.The INA219 senses across shunts on buses that can vary from 0 to 26 V. The device uses a single 3- to 5.5-V supply, drawing a maximum of 1 mA of supply current.This chip can be used in servers,telecom equipment,notebook computers,power management,battery chargers,welding equipment,power supplies,test equipment and so on.

LibDriver INA219 is a full-featured driver for INA219, launched by LibDriver.It provides continuous reading, single reading, current acquisition, voltage acquisition, power acquisition and additional features. LibDriver is MISRA compliant.

### Table of Contents

- [Instruction](#Instruction)
  - [Install](#Install)
  - [Usage](#Usage)
    - [example basic](#example-basic)
    - [example shot](#example-shot)
  - [Document](#Document)
  - [Contributing](#Contributing)
  - [License](#License)
  - [Contact Us](#Contact-Us)

### Instruction

/src includes LibDriver INA219 source files.

/interface includes LibDriver INA219 IIC platform independent template.

/test includes LibDriver INA219 driver test code and this code can test the chip necessary function simply.

/example includes LibDriver INA219 sample code.

/doc includes LibDriver INA219 offline document.

/datasheet includes INA219 datasheet.

/project includes the common Linux and MCU development board sample code. All projects use the shell script to debug the driver and the detail instruction can be found in each project's README.md.

/misra includes the LibDriver MISRA code scanning results.

### Install

Reference /interface IIC platform independent template and finish your platform IIC driver.

Add the /src directory, the interface driver for your platform, and your own drivers to your project, if you want to use the default example drivers, add the /example directory to your project.

### Usage

You can refer to the examples in the /example directory to complete your own driver. If you want to use the default programming examples, here's how to use them.

#### example basic

```C
#include "driver_ina219_basic.h"

uint8_t res;

res = ina219_basic_init(INA219_ADDRESS_0, 0.1);
if (res != 0)
{
    return 1;
}

...

for (i = 0; i < times; i++)
{
    float mV;
    float mA;
    float mW;

res = ina219_basic_read(&mV, &mA, &mW);
    if (res != 0)
    {
        (void)ina219_basic_deinit();

return 1;
    }

ina219_interface_debug_print("ina219: %d/%d.\n", i + 1, times);
    ina219_interface_debug_print("ina219: bus voltage is %0.3fmV.\n", mV);
    ina219_interface_debug_print("ina219: current is %0.3fmA.\n", mA);
    ina219_interface_debug_print("ina219: power is %0.3fmW.\n", mW);
    ina219_interface_delay_ms(1000);
    
    ...
}

...

(void)ina219_basic_deinit();

return 0;
```

#### example shot

```C
#include "driver_ina219_shot.h"

uint8_t res;

res = ina219_shot_init(INA219_ADDRESS_0, 0.1);
if (res != 0)
{
    return 1;
}

...

for (i = 0; i < times; i++)
{
    float mV;
    float mA;
    float mW;

res = ina219_shot_read(&mV, &mA, &mW);
    if (res != 0)
    {
        (void)ina219_shot_deinit();

return 1;
    }

...

(void)ina219_shot_deinit();

return 0;
```

### Document

Online documents: [https://www.libdriver.com/docs/ina219/index.html](https://www.libdriver.com/docs/ina219/index.html).

Offline documents: /doc/html/index.html.

### Contributing

Please refer to CONTRIBUTING.md.

### License

The MIT License (MIT)

Permission is hereby granted, free of charge, to any person obtaining a copy

of this software and associated documentation files (the "Software"), to deal

in the Software without restriction, including without limitation the rights

to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

copies of the Software, and to permit persons to whom the Software is

furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all

copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

SOFTWARE.

### Contact Us

Please send an e-mail to lishifenging@outlook.com.

ina219

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