1.6 SPI Driver Asynchronous - Multi Client

This example demonstrates how to use single instance of the SPI driver in asynchronous mode to communicate with multiple EEPROMs.

Description

This example write and read data to and from two separate EEPROM connected over the same SPI bus by using the multi client feature of the driver. The example also demonstrates how to setup two different EEPROM transfers at different baud rates.

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/async/spi_multi_slave/firmware.

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

Project NameDescription
sam_a7g5_ek.XMPLABX project for SAMA7G54 Evaluation 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 the Hardware

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

Project NameDescription
sam_a7g5_ek.XSAMA7G54 Evaluation Kit

Setting Up SAMA7G54 Evaluation Kit

ADDTIONAL HARDWARE REQUIRED
SETTING UP THE BOARD
  • Install EEPROM 4 Click1 boards on to the MikroBus1 connector
  • Install EEPROM 4 Click2 boards on to the MikroBus2 connector
  • Connect the USB port J7 on board to the computer using a micro USB cable (to power the board)
  • Connect the USB port J24 on board to the computer using a micro USB cable (to enable debug com port)

Running the Application

  1. Build the application using its IDE
  2. The LED turns ON when the data read from the EEPROMs matches with the data written to the EEPROMs.
Refer to the following table for LED name:
BoardLED Name
SAMA7G54 Evaluation KitRGB_LED (Red)