eniac77 / avr128da48-led-blink-interrupt-example

This repository contains examples of bare metal source code for GPIO and interrupt. The code examples were developed for AVR128DA48.

AVR128DA48 LED Blink Using Timer Interrupt Code Example

This repository provides an Atmel Studio solution with a bare metal code example for an LED blink driven by a timer overflow interrupt (Timer/Counter Type A). This example demonstrates a simple toggling of a LED connected to the PC6 (on-board user LED) with an on/off cycle period of 1 second implemented through the use of an interrupt generated by the overflow of TCA0. The on-board user LED on the development board will toggle each 500 milliseconds.

Related Documentation

More details and code examples on the AVR128DA48 can be found at the following links:

• AVR128DA48 Product Page
• AVR128DA48 Code Examples on GitHub
• AVR128DA48 Project Examples in START

Software Used

• Atmel Studio 7.0.2397 or newer (microchip.com/mplab/avr-support/atmel-studio-7)
• AVR-Dx 1.0.18 or newer Device Pack

Hardware Used

• AVR128DA48 Curiosity Nano (DM164151)

Setup

The AVR128DA48 Curiosity Nano Development Board is used as test platform

The following configurations must be made for this project:

TCA0:

• Normal mode
• Input clock Main Clock (4MHz) /256
• Overflow interrupt enabled
• Period 0x2000

CPUINT:

• Global interrupt enabled

Pin	Configuration
PC6 (LED0)	Digital Output

Operation

1. Open the AVRDA_LED_blink_interrupt.atsln solution in Atmel Studio

2. Build the solution: right click on AVRDA_LED_blink_interrupt solution and select Build
   

3. Select the AVR128DA48 Curiosity Nano on-board debugger in the Tool section of the project settings:

• Right click on the project and click Properties;
• Click Tool tab on the left panel, select the corresponding debugger and save the configuration (Ctrl + S)
  

4. Program the project to the board: select AVRDA_LED_blink_interrupt project and click Start Without Debugging:
   

Demo:

Summary

This example represents a basic LED toggling application. The toggling is implemented using the built-in delay function and the on-board LED of the AVR128DA48 Curiosity Nano is toggled every 500 milliseconds.