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# 1.20 PIT Polling

This example application shows how to use PIT counter in polling mode.

## Description

This example application configures the PIT Peripheral Library in polling mode and it enables PIT counter. Whenever PIT time period expires then LED toggles and then PIT counter restarts again.

## 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 be downloaded using content manager by following these instructions.

Path of the application within the repository is apps/pit/led_toggle_polling/firmware.

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

Project Name | Description
--- | ---
sam_9x75_curiosity.X | MPLABX project for SAM9X75 Curiosity Development Board

## Setting Up AT91Bootstrap Loader

To load the application binary onto the target device, the user needs 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 Name | Description
--- | ---
sam_9x75_curiosity.X | SAM9X75 Curiosity Development Board

### Setting Up SAM9X75 Curiosity Development Board

- Connect the UART DEBUG J35 on board to the computer using a UART-FTDI cable (to enable debug com port)
- Connect the USB port J2 on board to the computer using a micro USB cable (to power the board)

## Running the Application

1. Build the application using its IDE
2. LED toggles every 500 ms

Refer to the following table for LED name:

Board | LED Name
--- | ---
SAM9X75 Curiosity Development Board | RGB_LED (Blue)