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# 1.10 I2C EEPROM AT24 Driver - EEPROM Read Write

This example application shows how to use the AT24 driver to perform read and write operations on AT24 series of EEPROM.

## Description

This example uses the AT24 driver to communicate with I2C based On-Board AT24MAC402 series EEPROMs to perform write and read operations in Bare-Metal environment.

## Downloading and Building the Application

To clone or download this application from Github, go to the main page of this repository and then click Clone button to clone this repository or download as zip file. This content can also be downloaded using content manager by following these instructions.

Path of the application within the repository is apps/driver/i2c_eeprom/at24/at24_eeprom_read_write/firmware.

To build the application, refer to the following table and open the project using its IDE.

Project Name | Description
--- | ---
sam_d21_xpro.X | MPLABX project for SAM D21 Xplained Pro Evaluation Kit

## Setting Up the Hardware

The following table shows the target hardware for the application projects.

Project Name | Description
--- | ---
sam_d21_xpro.X | SAM D21 Xplained Pro Evaluation Kit

### Setting Up SAM D21 Xplained Pro Evaluation Kit

- To run the demo, the following additional hardware are required:
  - One EEPROM 3 Click board
  - One mikroBUS Xplained Pro board
- Connect mikroBUS Xplained Pro boards on to the “EXT2” header
- Connect the Debug USB port on the board to the computer using a micro USB cable

## Running the Application

1. Build and program the application using its IDE
2. LED indicates success or failure:
   - The LED is turned ON when the value read from the EEPROM matched with the written value

Refer to the following table for LED name:

Board | LED Name
--- | ---
SAM D21 Xplained Pro Evaluation Kit | LED0