semi-working snake game

user-apps/snake/src/main.rs

@@ -0,0 +1,69 @@
+#![no_std]
+#![no_main]
+
+extern crate alloc;
+use abi::{
+    KeyCode, Rng,
+    display::{Display, SCREEN_HEIGHT, SCREEN_WIDTH},
+    get_key, lock_display, print, sleep,
+};
+use alloc::format;
+use core::panic::PanicInfo;
+use embedded_graphics::{pixelcolor::Rgb565, prelude::RgbColor};
+use embedded_snake::{Direction, SnakeGame};
+
+#[panic_handler]
+fn panic(info: &PanicInfo) -> ! {
+    print(&format!(
+        "user panic: {} @ {:?}",
+        info.message(),
+        info.location(),
+    ));
+    loop {}
+}
+
+#[unsafe(no_mangle)]
+pub extern "Rust" fn _start() {
+    main()
+}
+
+const CELL_SIZE: usize = 8;
+
+pub fn main() {
+    print("Starting Snake app");
+    let mut display = Display;
+
+    let mut game = SnakeGame::<100, Rgb565, Rng>::new(
+        SCREEN_WIDTH as u16,
+        SCREEN_HEIGHT as u16,
+        CELL_SIZE as u16,
+        CELL_SIZE as u16,
+        Rng,
+        Rgb565::BLACK,
+        Rgb565::GREEN,
+        Rgb565::RED,
+        50,
+    );
+
+    loop {
+        if let Some(event) = get_key() {
+            let direction = match event.key {
+                KeyCode::Up => Direction::Up,
+                KeyCode::Down => Direction::Down,
+                KeyCode::Right => Direction::Right,
+                KeyCode::Left => Direction::Left,
+                KeyCode::Esc => return,
+                _ => Direction::None,
+            };
+            game.set_direction(direction);
+        }
+
+        // ensure all draws show up at once
+        lock_display(true);
+        game.pre_draw(&mut display);
+        game.draw(&mut display);
+        lock_display(false);
+
+        sleep(15);
+    }
+}