TWIHS EEPROM Read Write

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

Parent topic:Harmony 3 Peripheral Library Application Examples for SAMA5D2 Family

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.

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.

Setting Up SAMA5D29 Curiosity Development Board

ADDITIONAL HARDWARE REQUIRED

• To run the demo, the following additional hardware are required:
  • EEPROM 3 click Board

SETTING UP THE BOARD

• Connect the Debug USB port on the board to the computer using a micro USB cable
• Connect EEPROM Click 3 Board to XPRO EXT2 (J19) connector on the board as per below Pin Connections table
• |J19 MikroBus1
  Pins|EEPROM 3 CLICK
  Pins| |--------------------------------------|---------------------------------------| |PIN 11 (PD4)|SDA| |PIN 12 (PD5)|SCL| |PIN 19|GND| |PIN 20|3V3|

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: