k0i05/esp_driver_i2c_ext

readme

# ESP-IDF I2C Component Extension

[![License: MIT](https://cdn.prod.website-files.com/5e0f1144930a8bc8aace526c/65dd9eb5aaca434fac4f1c34_License-MIT-blue.svg)](/LICENSE)
[![Edited with VS Code](https://badgen.net/badge/icon/VS%20Code?icon=visualstudio&label=edited%20with)](https://visualstudio.microsoft.com)
[![Build with PlatformIO](https://img.shields.io/badge/build%20with-PlatformIO-orange?logo=data%3Aimage%2Fsvg%2Bxml%3Bbase64%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)](https://platformio.org/)
[![PlatformIO Registry](https://badges.registry.platformio.org/packages/k0i05/library/esp_driver_i2c_ext.svg)](https://registry.platformio.org/libraries/k0i05/esp_driver_i2c_ext)
[![ESP Component Registry](https://components.espressif.com/components/k0i05/esp_driver_i2c_ext/badge.svg)](https://components.espressif.com/components/k0i05/esp_driver_i2c_ext)

This ESP32 espressif IoT development framework (esp-idf) i2c component extension was developed to extend `i2c_master.h` i2c peripheral driver functionality.  This component is a dependency for all i2c peripheral components.  Information on features and functionality are documented and can be found in the `i2c_master_ext.h` header file.

## Repository

The component is hosted on github and is located here: <https://github.com/K0I05/ESP32-S3_ESP-IDF_COMPONENTS/tree/main/components/peripherals/i2c/esp_driver_i2c_ext>

## General Usage

To get started, simply copy the component to your project's `components` folder and reference the `i2c_master_ext.h` header file as an include.  The component includes documentation for the peripheral such as the datasheet, application notes, and/or user manual where applicable.

```text
components
└── esp_driver_i2c_ext
    ├── CMakeLists.txt
    ├── README.md
    ├── LICENSE
    ├── idf_component.yml
    ├── library.json
    ├── documentation
    │   └── datasheets, etc.
    ├── include
    │   └── i2c_master_ext_version.h
    │   └── i2c_master_ext.h
    └── i2c_master_ext.c
```

## Basic Example

Once the component is referenced as an include, the extended i2c functions should be visible and available for usage.  The below example demonstrates an i2c `get` and `set` transaction which reads the register's contents and/or writes contents to the register.

```c
#include <i2c_master_ext.h>

/* i2c read transaction: i2c_master_bus_read_uint8 function performs an i2c write and then read transaction  */
esp_err_t i2c_bmp280_get_control_measurement_register(i2c_bmp280_handle_t handle, i2c_bmp280_control_measurement_register_t *const reg) {
    /* validate arguments */
    ESP_ARG_CHECK( handle && reg );

    /* attempt i2c read transaction */
    ESP_RETURN_ON_ERROR( i2c_master_bus_read_uint8(handle->i2c_handle, I2C_BMP280_REG_CTRL, &reg->reg), TAG, "read control measurement register failed" );

    /* delay before next i2c transaction */
    vTaskDelay(pdMS_TO_TICKS(I2C_BMP280_CMD_DELAY_MS));

    return ESP_OK;
}

/* i2c read transaction: i2c_master_bus_write_uint8 function performs an i2c write transaction  */
esp_err_t i2c_bmp280_set_control_measurement_register(i2c_bmp280_handle_t handle, const i2c_bmp280_control_measurement_register_t reg) {
    /* validate arguments */
    ESP_ARG_CHECK( handle );

    /* attempt i2c write transaction */
    ESP_RETURN_ON_ERROR( i2c_master_bus_write_uint8(handle->i2c_handle, I2C_BMP280_REG_CTRL, reg.reg), TAG, "write control measurement register failed" );

    /* delay before next i2c transaction */
    vTaskDelay(pdMS_TO_TICKS(I2C_BMP280_CMD_DELAY_MS));

    return ESP_OK;
}
```

Copyright (c) 2024 Eric Gionet (<gionet.c.eric@gmail.com>)