# avr128da48-led-dimming-pwm-example

**Repository Path**: microchip-pic-avr-examples/avr128da48-led-dimming-pwm-example

## Basic Information

- **Project Name**: avr128da48-led-dimming-pwm-example
- **Description**: AVR128DA48 LED Dimming with PWM Example
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-06-17
- **Last Updated**: 2020-12-19

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

<a href="https://www.microchip.com" rel="nofollow"><img src="images/Microchip.png" alt="MCHP" width="300"/></a>

# AVR128DA48 LED Dimming Using PWM Code Example

This repository provides an Atmel Studio solution with a bare metal code example for an LED dimming implemented using a PWM signal.
The example demonstrates the basic functionality of Timer/Counter Type A (TCA) used to generate a PWM signal. The output waveform is connected to the on-board LED. The PWM duty cycle value is incremented continuously until it reaches the maximum value and then is reloaded to 0. This produces the dimming effect of the LED.

## Related Documentation
More details and code examples on the AVR128DA48 can be found at the following links:
- [AVR128DA48 Product Page](https://www.microchip.com/wwwproducts/en/AVR128DA28)
- [AVR128DA48 Code Examples on GitHub](https://github.com/microchip-pic-avr-examples?q=avr128da48)
- [AVR128DA48 Project Examples in START](https://start.atmel.com/#examples/AVR128DA48CuriosityNano)


## Software Used
- Atmel Studio 7.0.2397 or newer [(microchip.com/mplab/avr-support/atmel-studio-7)](https://www.microchip.com/mplab/avr-support/atmel-studio-7)
- AVR-Dx 1.0.18 or newer Device Pack


## Hardware Used
- AVR128DA48 Curiosity Nano [(DM164151)](https://www.microchip.com/Developmenttools/ProductDetails/DM164151)

## Setup
The AVR128DA48 Curiosity Nano Development Board is used as test platform
<br><img src="images/AVR128DA48_CNANO_instructions.PNG" width="500">

TCA1:
 - Single-slope PWM Mode
 - Compare channel 2 enabled
 - Input clock 4Mhz

The following configurations must be made for this project:

|Pin           | Configuration      |
| :----------: | :----------------: |
|PC6 (LED0)    | Digital Output     |


## Operation

1. Open the *AVR-DA_LED_dimming_PWM.atsln* solution in Atmel Studio

2. Build the solution: right click on *AVR-DA_LED_dimming_PWM* solution and select Build
<br><img src="images/AVR-DA_LED_dimming_pwm_build.png" width="500">

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)
<br><img src="images/AVR-DA_LED_dimming_pwm_tool_settings.png" width="500">


4. Program the project to the board: select *AVR-DA_LED_dimming_PWM* project and click *Start Without Debugging*:
<br><img src="images/AVR-DA_LED_dimming_pwm_program.png" width="500">

Demo:
<br><img src="images/AVR-DA_LED_dimming_pwm.gif" width="500">

## Summary
The example demonstrates the basic functionality of Timer/Counter Type A (TCA) used to generate a PWM signal. The generated PWM signal produces the dimming effect of the on-board LED.