FLEXCOM TWI (I2C) EEPROM

This example application shows how to use the FLEXCOM module in TWI mode.

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

Description

This application configures the FLEXCOM peripheral in TWI mode to read and write data
from an external EEPROM memory chip. Data is written to the EEPROM and then read
back and compared. Successful comparison is indicated by turning on an LED.

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/flexcom/twi/master/flexcom_twi_eeprom/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

• EEPROM 3 click Board

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 RPi 40-pin GPIO (J25) connector on the board as per below Pin Connections table

  XPRO EXT2 (J26) Pins	EEPROM 4 CLICK Pins
  PIN 19	SDA
  PIN 21	SCL
  PIN 17	3V3
  PIN 39	GND

Running the Application

1. Build 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

Following table provides the LED name: