1.10 SPI EEPROM AT25 Driver - EEPROM Read Write

This example application shows how to use the AT25 driver to perform read and write operations on AT25 series of EEPROM.

Description

This example uses the AT25 driver to communicate with the SPI based AT25 series of external 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/spi_eeprom/at25/at25_eeprom_read_write.

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

Project NameDescription
sam_a7d65_curiosity.XMPLABX project for SAMA7D65 Curiosity 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
sam_a7d65_curiosity.XSAMA7D65 Curiosity Board

Setting Up SAMA7D65 Curiosity Board

ADDTIONAL HARDWARE REQUIRED
SETTING UP THE BOARD
  • Install an EEPROM 4 Click board on to the mikroBUS1 connector
  • Connect the USBA port J3 on the board to the computer using a Type-C USB cable (to power the board)

Running the Application

  1. Build the application using its IDE.
  2. The LED is turned ON when the value read from EEPROM matches with the written data.
Refer to the following table for LED name:
BoardLED Name
SAMA7D65 Curiosity BoardRGB_LED (Blue)