Crate sensehat_screen [−] [src]
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.
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::open("/dev/fb1").expect("Could not open the framebuffer for the screen");
let red_pixel = PixelColor::new(255, 0, 0); // rgb colors are 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
}
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
.
Structs
FontCollection |
A set of font symbols that can be printed on a |
FontString |
A string of font symbols valid for rendering. |
FrameLine |
A single frame on the screen. Defaults to an inner capacity for 128 bytes, suitable for the 8x8 pixel screen. |
PixelColor |
A single LED pixel color, with RGB565 rendering. |
Screen |
Framebuffered 8x8 LED screen. |
Functions
font_to_frame |
Render a font symbol with a |
print_collection |
Display the contents of a |