https://github.com/cervm/raspi_dart_led_control

A minimal command-line application demonstrating GPIO control on a Raspberry Pi using Dart's FFI (Foreign Function Interface) to interact with libgpiod.
https://github.com/cervm/raspi_dart_led_control

dartlang ffi gpio raspberry-pi

Last synced: 7 days ago
JSON representation

A minimal command-line application demonstrating GPIO control on a Raspberry Pi using Dart's FFI (Foreign Function Interface) to interact with libgpiod.

• Host: GitHub
• URL: https://github.com/cervm/raspi_dart_led_control
• Owner: cervm
• License: mit
• Created: 2024-08-25T20:50:04.000Z (about 1 month ago)
• Default Branch: main
• Last Pushed: 2024-08-26T21:09:15.000Z (about 1 month ago)
• Last Synced: 2024-09-22T06:03:30.621Z (11 days ago)
• Topics: dartlang, ffi, gpio, raspberry-pi
• Language: Dart
• Homepage:
• Size: 9.77 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

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README

        
# Raspberry Pi Dart LED Control

A minimal command-line application demonstrating GPIO control on a Raspberry Pi using Dart's FFI (Foreign Function Interface) to interact with `libgpiod` v2. This project provides an example of controlling an LED with a push button.

Tested on **Raspberry Pi 5** running **Raspberry Pi OS (64-bit)**.

## Demo

[![Video Demo](https://i3.ytimg.com/vi/NhQ8_xI-70U/maxresdefault.jpg)](https://youtu.be/NhQ8_xI-70U)

## Components

- LED

- 220Ω Resistor

- Push Button

## Prerequisites

- Dart SDK installed on your Raspberry Pi.

- `libgpiod` v2 pre-installed on your Raspberry Pi (needed for GPIO access).

## Limitations

- Only compatible with 64-bit OS.

- Chip name is hard-coded to `gpiochip4` in `gpio_manager.dart`.

## Running the Application

1. **Connect the Components:**

   - Connect the LED to a GPIO pin (set to 03 (BCM) in `main.dart`).

   - Connect the push button to another GPIO pin (set to 21 (BCM) in `main.dart`).

2. **Run the Application:**

   ```bash

   dart run bin/main.dart

   ```

## Usage

- The LED will blink continuously when the button is not pressed.

- When the button is pressed, the LED remains lit continuously.

## Project Structure

- **`bin/`**: Contains the main entry point of the application.

- **`lib/`**: Contains the library code, including FFI bindings and GPIO management logic.

## References

- [Dart FFI Documentation](https://dart.dev/guides/libraries/c-interop)

- [libgpiod Documentation](https://git.kernel.org/pub/scm/libs/libgpiod/libgpiod.git/about/)

- [Raspberry Pi GPIO Documentation](https://www.raspberrypi.com/documentation/computers/os.html#use-gpio-from-python)

- [Raspberry Pi Flutter Installer](https://github.com/Snapp-X/snapp_installer)

- [libgpiod Example](https://github.com/starnight/libgpiod-example)