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# 1.26 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 Name | Description
--- | ---
sam_e70_xult.X | MPLABX project for SAM E70 Xplained Ultra Evaluation Kit
sam_e70_xult_freertos.X | MPLABX project for SAM E70 Xplained Ultra Evaluation Kit
sam_v71_xult.X | MPLABX project for SAM V71 Xplained Ultra Evaluation Kit
sam_v71_xult_freertos.X | MPLABX project for SAM V71 Xplained Ultra Evaluation Kit

## Setting Up the Hardware

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

Project Name | Description
--- | ---
sam_e70_xult.X sam_e70_xult_freertos.X | SAM E70 Xplained Ultra Evaluation Kit
sam_v71_xult.X sam_v71_xult_freertos.X | SAM V71 Xplained Ultra Evaluation Kit

### Setting Up SAM E70 Xplained Ultra Evaluation Kit

- To run the demo, the following additional hardware are required:
  - Two EEPROM 4 click boards
  - One mikroBUS Xplained Pro boards
- Install EEPROM 4 click board on the click board slot on board
- Install another EEPROM 4 click board on to the mikroBUS Xplained Pro board
- Connect the mikroBUS Xplained Pro board on EXT2 header
- Connect a jumper between LED2 and PB08 on J203 header
- Connect the Debug USB port on the board to the computer using a micro USB cable

### Setting Up SAM V71 Xplained Ultra Evaluation Kit

- To run the demo, the following additional hardware are required:
  - Two EEPROM 4 click boards
  - Two mikroBUS Xplained Pro boards
- Install EEPROM 4 click boards on to the mikroBUS Xplained Pro boards
- Connect the mikroBUS Xplained Pro boards on EXT1 and EXT2 headers
- Connect the Debug USB port on the board to the computer using a micro USB cable

## Running the Application

1. Build and program the application using its IDE
2. The LED indicates success or failure
   - 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:

Board | LED Name
--- | ---
SAM E70 Xplained Ultra Evaluation Kit | LED2
SAM V71 Xplained Ultra Evaluation Kit | LED0