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# 1.12 EIC Interrupt

This example application demonstrates how to generate interrupt using the EIC on switch press and indicate it through an LED.

## Description

The application registers an event callback with EIC Peripheral library and toggles an LED for every switch press event.

## 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/eic/eic_led_on_off/firmware.

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

Project Name | Description
--- | ---
sam_l21_xpro.X | MPLABX project for SAM L21 Xplained Pro Evaluation Kit

## Setting Up the Hardware

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

Project Name | Description
--- | ---
sam_l21_xpro.X | SAM L21 Xplained Pro Evaluation Kit

### Setting Up SAM L21 Xplained Pro Evaluation Kit

- 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. LED toggles on every switch release

Following table provides the Switch and LED name:

Board | Switch Name | LED Name
--- | --- | ---
SAM L21 Xplained Pro Evaluation Kit | SW0 | LED0