1.8 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 External AT24CM0 series EEPROMs to perform write and read operations in Bare-Metal/ RTOS 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 NameDescription
sama5d29_curiosity.XMPLABX project for SAMA5D29 Curiosity Development Board
sama5d29_curiosity_freertos.XMPLABX project for SAMA5D29 Curiosity Development Board

Setting Up AT91Bootstrap loader

To load the application binary onto the target device, we need to use at91bootstrap loader. Refer to the at91bootstrap loader documentation for details on how to configure, build and run bootstrap loader project and use it to bootstrap the application binaries.

Setting Up the Hardware

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

Project NameDescription
sama5d29_curiosity.XSAMA5D29 Curiosity Development Board

sama5d29_curiosity_freertos.X

SAMA5D29 Curiosity Development Board

Setting Up SAMA5D29 Curiosity Development Board

ADDTIONAL HARDWARE REQUIRED
SETTING UP THE BOARD
  • Connect the USB_A port on board to the computer using a USB-C type cable
  • Connect EEPROM Click 3 Board to MikroBus1 (J19) connector on the board as per below Pin Connections table
    J19 MikroBus1 PinsEEPROM 3 CLICK Pins
    PIN 11 (PD4)SDA
    PIN 12 (PD5)SCL
    PIN 19GND
    PIN 203V3

Running the Application

  1. Build and program the application using its IDE
  2. LED indicates the success or failure:
    • LED is turned ON when the value read from the EEPROM matched with the written value
    • LED is turned OFF when the value read from the EEPROM did not match with the written value
Refer to the following table for LED name:
BoardLED Name
SAMA5D29 Curiosity Development BoardRGB_LED (Green)