1.14 PIO Interrupt

This example shows how to generate GPIO interrupt on switch press and release, and indicate the switch status using the LED.

Description

This application uses the PIO Peripheral library to generate callback on switch press and release, and drives the GPIO pin connected to the LED to indicate the switch status. The LED is turned ON when the switch is pressed and turned OFF when the switch is released.

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/pio/pio_led_on_off_interrupt/firmware.

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

Project NameDescription
sam_rh71_ek.XMPLABX project for SAM RH71 Evaluation Kit

Setting Up the Hardware

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

Project NameDescription
sam_rh71_ek.XSAM RH71 Evaluation Kit

Setting Up SAM RH71 Evaluation Kit

  • Connect the debugger probe to J33

Running the Application

  1. Build and Program the application using its IDE
  2. LED is turned ON when the switch is pressed and turned OFF when the switch is released
Following table provides the Switch and LED names:
BoardSwitch NameLED Name
SAM RH71 Evaluation KitPB0LED0