1.40 TWIHS EEPROM Read Write

This example application shows how to use the TWIHS peripheral to write and read from the I2C serial EEPROM memory.

Description

This example uses the TWIHS peripheral library to write an array of values to the I2C Serial EEPROM and verify the value written by reading the values back and comparing it to the value written.

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/twihs/master/twihs_eeprom_read_write/firmware.

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

Project NameDescription
sam_a5d29_curiosity.XMPLABX project for SAMA5D29 Curiosity Development Board Kit

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 SAMA5D29 Curiosity Development Board

ADDITIONAL HARDWARE REQUIRED
SETTING UP THE BOARD
  • Connect the Debug USB port on the board to the computer using a Type-C USB 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 08GND
    PIN 073V3

Running the Application

  1. Build the application using its IDE
  2. The LED indicates the 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
SAMA5D29 Curiosity Development BoardRGB_LED (Green)