1.4 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 NameDescription
cec1736_evb.XMPLABX project for CEC 1736 Development Board

Setting Up the Hardware

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

Project NameDescription
cec1736_evb.XCEC 1736 Development Board

Setting Up CEC 1736 Development Board

  • Interface the EEPROM 3 click Board by making the following connections:
    • Connect a wire from GPIO140 (I2C06_SCL) available on Pin 28 of P4 header to the SCL pin of the EEPROM 3 click board
    • Connect a wire from GPIO132 (I2C06_SDA) available on Pin 26 of P4 header to the SDA pin of the EEPROM 3 click board
    • Connect GND and VCC between the EEPROM 3 click Board and the CEC 1736 Development Board
  • 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
    • The 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
CEC 1736 Development BoardLED6