A Rust library for the Raspberry Pi Sense HAT LED Screen

The Raspberry Pi Sense HAT has an 8×8 RGB LED matrix that provides its own driver for the Linux framebuffer.

This library provides a thread-safe, strong-typed, high-level API for the LED matrix, treating it as you would any other screen on a Linux box.

Usage

To use this crate with the default features, add this to your Cargo.toml:

[dependencies]
sensehat-screen = "0.1"

or, to manually specify the features::

[dependencies]
sensehat-screen = { version = "0.1", default-features = false, features = ["fonts"] }

Then you can use it with your crate:

extern crate sensehat_screen

use sensehat_screen::{FontCollection, FrameLine, PixelColor, Screen};

Example

The following program shows how to:

Open the framebuffer file-descriptor for the LED matrix screen (screen)
Define a pixel color (red_pixel)
Define a vector of each pixel color that makes up the screen (all_64_pixels)
Turn that vector into a valid screen frame
Show the frame on the screen

extern crate sensehat_screen;

use sensehat_screen::{FrameLine, PixelColor, Screen};

fn main() {
    let mut screen = Screen::new("/dev/fb1")
        .expect("Could not open the framebuffer for the screen");

    let red_pixel = PixelColor::new(255, 0, 0); // The pixel color's RGB components are each in the range of 0 <= c < 256.

    let all_64_pixels = vec![red_pixel; 64];   // A single vector of 8 x 8 = 64 pixel colors (rows are grouped by chunks of 8)

    let all_red_screen = FrameLine::from_pixels(&all_64_pixels); // a screen frame

    screen.write_frame(&all_red_screen); // show the frame on the LED matrix
}

Source Code Examples

Features

`default`

By default, the linux-framebuffer, fonts, and serde-support features are included.

`linux-framebuffer`

Use the Linux framebuffer to write to the LED matrix.

`fonts`

A collection of legacy 8x8 fonts, renderable on the LED matrix.

`serde-support`

Enables support for serialization/deserialization with serde.

Feature Wish List

linux-framebuffer - Use the Linux framebuffer to write to the LED matrix.
fonts - A collection of legacy 8x8 fonts, renderable on the LED matrix.
serde-support - Enables support for serialization/deserialization with serde.
images - Load 8x8 images to the LED matrix with image.
cgmath - Computer-graphics utilities for manipulating the matrix mathematically.

sensehat-screen 0.1.4